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ASAMOTO SHINGO
| Environmental Science and Civil Engineering Division | Associate Professor |
| Department of Civil and Environmental Engineering |
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Researcher information
■ Degree■ Research Keyword
■ Field Of Study
- Social infrastructure (civil Engineering, architecture, disaster prevention), Civil engineering (materials, implementation, construction management)
- Mar. 2006, The University of Tokyo, The Graduate School of Engineering, Department of Civil Engineering, Japan
- Mar. 2003, The University of Tokyo, The Graduate School of Engineering, Department of Civil Engineering, Japan
- Mar. 2001, The University of Tokyo, The Faculty of Engineering, Department of Civil Engineering, Japan
- Oct. 2024, Outstanding Reviewers, Aug. 2023-Jul. 2024, Journal of Advanced Concrete Technology
Shingo Asamoto - 2024, The best paper of the year from Japan Concrete Institute, Japan Concrete Institute
Yuriko Okazaki, Shiichiro Okazaki, Shingo Asamoto, Keiichi Imamoto - Oct. 2023, Outstanding Reviewers, Aug. 2022-Jul. 2023, Journal of Advanced Concrete Technology
Shingo Asamoto - Oct. 2021, Outstanding Reviewers, Aug. 2020-Jul. 2021, Journal of Advanced Concrete Technology
Shingo Aasmoto - Oct. 2020, Outstanding Reviewers, Aug. 2019-Jul. 2020, Journal of Advanced Concrete Technology
Shingo Asamoto - Oct. 2019, Outstanding Reviewers, Aug. 2018-Jul. 2019, Journal of Advanced Concrete Technology
Shingo Asamoto - 2012, The excellent presentation award in the 67th Japan Cement Association Annual Convention, Japan Cement Association
Shingo Asamoto - 2012, Encouragement award of the year by a young researcher, Japan Concrete Institute
Shingo Asamoto - 2010, The excellent presentation award in the 65th JSCE Annual Convention, Japan Society of Civil Engineers
Shingo Asamoto - 2010, The excellent presentation award in the Japan Concrete Institute Annual Convention, Japan Concrete Institute
Shingo Asamoto - 2010, The excellent presentation award in the 64th Japan Cement Association Annual Convention, Japan Cement Association
Shingo Asamoto - 2008, Encouragement award of the year by a young researcher, Japan Society of Civil Engineers
Shingo Asamoto - 2005, The best paper of the year, Japan Society of Civil Engineers
Tetsuya. Ishida;Koichi Maekawa;Yinbang Z. Zhu;Shingo Asamoto
Performance information
■ Paper- 3D RBSM-based mesoscale simulation on the fracture behavior of high-strength concrete under compression: considering aggregate strength grade and shape
Yi Wang; Xunjie Zhang; Faxing Ding; Kohei Nagai; Shingo Asamoto
Journal of Building Engineering, Oct. 2025
Scientific journal
DOI：https://doi.org/10.1016/j.jobe.2025.113235
DOI ID：10.1016/j.jobe.2025.113235, ORCID：186305176 - Multiscale analysis on microstructural changes in hardened cement paste dried under different relative humidity levels: A comparison with cement paste containing water-dispersible polyurethane ether compound
Shingo Asamoto; Keisuke Takahashi; Naoki Sakamoto; Tokio Sampei; Kunio Matsui
Cement and Concrete Research, Volume：194, First page：107896, Last page：107896, Aug. 2025, [Reviewed], [Lead, Corresponding]
Elsevier BV, Scientific journal
DOI：https://doi.org/10.1016/j.cemconres.2025.107896
DOI ID：10.1016/j.cemconres.2025.107896, ISSN：0008-8846 - Mesoscale simulation of cracking and shrinking during drying under coupled effect of environmental factors using 3D RBSM
Haoyu Wang; Jie Luo; Shingo Asamoto; Yuya Sakai; Kohei Nagai
Case Studies in Construction Materials, Volume：22, Jul. 2025, [Reviewed]
Scientific journal
DOI：https://doi.org/10.1016/j.cscm.2025.e04317
Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85216077911&origin=inward
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85216077911&origin=inward
DOI ID：10.1016/j.cscm.2025.e04317, ISSN：2214-5095, SCOPUS ID：85216077911 - Investigation of the compressive behaviour of restrained concrete with DEF and ASR-DEF deteriorations
Hakmana Vidana Arachchige Nuwan Sanjeewa; Shingo Asamoto; Kohei Nagai; Jie Luo
Construction and Building Materials, Volume：481, First page：141586, Last page：141586, Jun. 2025, [Reviewed]
Elsevier BV, Scientific journal
DOI：https://doi.org/10.1016/j.conbuildmat.2025.141586
DOI ID：10.1016/j.conbuildmat.2025.141586, ISSN：0950-0618, ORCID：183378309 - Strength changes associated with water transport in unsaturated tuff during drying
Yota Togashi; Haruhiko Kotabe; Masahiko Osada; Shingo Asamoto; Ken Hatakeyama
International Journal of Rock Mechanics and Mining Sciences, Volume：186, Feb. 2025, [Reviewed]
Scientific journal
DOI：https://doi.org/10.1016/j.ijrmms.2024.105984
Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85211155098&origin=inward
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85211155098&origin=inward
DOI ID：10.1016/j.ijrmms.2024.105984, ISSN：1365-1609, SCOPUS ID：85211155098 - Experimental study on flexural behaviour of DEF–ASR-affected prestressed concrete beams
Hakmana Vidana Arachchige Nuwan Sanjeewa; Ayumu Matsumoto; Shingo Asamoto; Renaud Pierre Martin; François Toutlemonde
Engineering Structures, Volume：319, Nov. 2024, [Reviewed], [Corresponding]
Scientific journal
DOI：https://doi.org/10.1016/j.engstruct.2024.118835
Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85202173746&origin=inward
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85202173746&origin=inward
DOI ID：10.1016/j.engstruct.2024.118835, ISSN：0141-0296, eISSN：1873-7323, SCOPUS ID：85202173746 - Why sorption hysteresis in tobermorite is limited
Tulio Honorio; Farid Benboudjema; Shingo Asamoto
Microporous and Mesoporous Materials, Sep. 2024, [Reviewed]
Scientific journal
DOI：https://doi.org/10.1016/j.micromeso.2024.113205
DOI ID：10.1016/j.micromeso.2024.113205, ORCID：161483910 - Conditions of DEF Development in Various Climatic Conditions: Laboratory and Field Investigation
Renaud-Pierre Martin; Shingo Asamoto; Yuichiro Kawabata; Célia Khetib; François Toutlemonde
May 2024, [Reviewed]
DOI：https://doi.org/10.1007/978-3-031-59349-9_64
DOI ID：10.1007/978-3-031-59349-9_64, ORCID：159020298 - Mechanical Properties of ASR/DEF Damaged Concrete Under External Restraints
Hakmana Vidana Arachchige Nuwan Sanjeewa; Shingo Asamoto
May 2024, [Reviewed], [Corresponding]
DOI：https://doi.org/10.1007/978-3-031-59349-9_24
DOI ID：10.1007/978-3-031-59349-9_24, ORCID：159020296 - Effect of Cement and Exposed Environment Differences on DEF Expansion: Joint Investigation Using Constituents from Japan and France
Shingo Asamoto; Azusa Izumi; Yuichiro Kawabata; Celia Khetib; Renaud-Pierre Martin; François Toutlemonde; Takumi Shimomura; Jun Tomiyama
May 2024, [Reviewed], [Corresponding]
DOI：https://doi.org/10.1007/978-3-031-59419-9_18
DOI ID：10.1007/978-3-031-59419-9_18, ORCID：158951656 - Interaction of ASR and DEF in Determining the Cause of Cracks in Prestressed Sleepers in India
Yoko Ando; Shinichi Hirono; Shingo Asamoto; Kohei Nagai
RILEM Bookseries, Volume：50, First page：301, Last page：308, May 2024, [Reviewed]
In book
DOI：https://doi.org/10.1007/978-3-031-59349-9_35
Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85194576403&origin=inward
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85194576403&origin=inward
DOI ID：10.1007/978-3-031-59349-9_35, ISSN：2211-0844, eISSN：2211-0852, SCOPUS ID：85194576403 - A review of mechanical properties of deteriorated concrete due to delayed ettringite formation and its influence on the structural behavior of reinforced concrete members
Hakmana Vidana Arachchige Nuwan Sanjeewa; Shingo Asamoto
Construction and Building Materials, Apr. 2024, [Reviewed], [Corresponding]
Scientific journal
DOI：https://doi.org/10.1016/j.conbuildmat.2024.135795
DOI ID：10.1016/j.conbuildmat.2024.135795, ORCID：155335572 - Influence of Reinforcing Rebar on Expansion due to Delayed Ettringite Formation along the Bonding Length – Part II: Bond Performance of Reinforced Concrete Affected by DEF Expansion
Taito Miura; Misato Fujishima; Yuichiro Kawabata; Stéphane Multon; Renaud-Pierre Martin; Naoshi Ueda; Yuya Takahashi; Shingo Asamoto; Jean-Francois Seignol
Journal of Advanced Concrete Technology, Volume：21, Number：11, First page：869, Last page：888, Nov. 2023, [Reviewed]
Japan Concrete Institute, Scientific journal
DOI：https://doi.org/10.3151/jact.21.869
DOI ID：10.3151/jact.21.869, ISSN：1346-8014, eISSN：1347-3913 - Influence of Reinforcing Rebar on Expansion due to Delayed Ettringite Formation along the Bonding Length – Part I: The Role of Bond on Expansive Behavior of Concrete
Yuichiro Kawabata; Taito Miura; Misato Fujishima; Naoshi Ueda; Yuya Takahashi; Shingo Asamoto; Stéphane Multon; Renaud-Pierre Martin; Jean-Francois Seignol
Journal of Advanced Concrete Technology, Volume：21, Number：11, First page：851, Last page：868, Nov. 2023, [Reviewed]
Japan Concrete Institute, Scientific journal
DOI：https://doi.org/10.3151/jact.21.851
DOI ID：10.3151/jact.21.851, ISSN：1346-8014, eISSN：1347-3913 - Standardized models for cracking due to restraint of imposed strains—The state of the art
Agnieszka Jędrzejewska; Mariusz Zych; Fragkoulis Kanavaris; Fangjie Chen; Shintaro Ito; Jean Michel Torrenti; Dirk Schlicke; Shingo Asamoto; Miguel Azenha
Structural Concrete, Aug. 2023, [Reviewed]
Scientific journal
DOI：https://doi.org/10.1002/suco.202200301
DOI ID：10.1002/suco.202200301, ORCID：127448739 - Length Change and Water Uptake Characteristics of Synthesized Calcium Silicate Hydrates
Shingo Asamoto; Rintaro Koyama; Kunio Matsui; Keisuke Takahashi
International RILEM Conference on Synergising Expertise towards Sustainability and Robustness of Cement-based Materials and Concrete Structures, First page：773, Last page：783, Jun. 2023, [Reviewed], [Corresponding]
Springer Nature Switzerland, In book
DOI：https://doi.org/10.1007/978-3-031-33187-9_71
DOI ID：10.1007/978-3-031-33187-9_71, ISSN：2211-0844, eISSN：2211-0852 - Effect of High Temperature at Early Age and Mineral Additives on Drying Shrinkage of Concrete with Blast Furnace Slag Cement
Tatsuya Usui; Shingo Asamoto; Shintaro Miyamoto
Jun. 2023, [Reviewed]
DOI：https://doi.org/10.1007/978-3-031-33211-1_90
DOI ID：10.1007/978-3-031-33211-1_90, ORCID：136660035 - Effect of high temperature at early ages on drying shrinkage and creep of concrete focusing on microcracking damage
Shingo Asamoto; Isao Kurashige; Pang-Jo Chun
Materials and Structures, Volume：56, Number：4, May 2023, [Reviewed], [Corresponding]
English, Scientific journal
DOI：https://doi.org/10.1617/s11527-023-02156-2
DOI ID：10.1617/s11527-023-02156-2, ISSN：1359-5997, eISSN：1871-6873, ORCID：132404762, Web of Science ID：WOS:000962747100001 - INVESTIGATION INTO WATER UPTAKE CHARACTERISTICS OF HARDENED CEMENT PASTE BASED ON DIFFUSION EQUATION
ASAMOTO Shingo; SHIREN Ryota; MATSUI Kunio; TAKAHASHI Keisuke
Cement Science and Concrete Technology, Volume：76, Number：1, First page：290, Last page：298, Mar. 2023, [Reviewed], [Corresponding]
The previous studies have reported that the water absorption amount with time can be proportional to the fourth root of absorption time. In this study, the water uptake characteristics of hardened cement paste was studied from a viewpoint of fourth root of uptake time. The one bottom surface of cement paste specimen was exposed to liquid water after drying equilibrium at 20, 40 and 105℃. The amount of water absorption was proportional to the fourth root of time as reported in the previous studies. In the case of drying at 105℃, the relationship was bilinear, which suggests that the water can penetrate into relatively large capillary pores and then fine gel pores as two processes. The model to apply different diffusion equations to the assumed capillary and gel pores can reproduce the water uptake behavior of cement paste dried at 105℃ when the constant diffusivities are used for each pore. The diffusion equations were applied to divided pore diameters, respectively when the simple pore distribution was assumed. It was found that the model to use constant large and small diffusivities according to threshold of pore diameter can represent the bilinear relationship between the water absorption amount and fourth root of time rather than the model to use the decreasing diffusivity with decreasing pore diameter.
Japan Cement Association, Japanese
DOI：https://doi.org/10.14250/cement.76.290
DOI ID：10.14250/cement.76.290, ISSN：0916-3182, eISSN：2187-3313 - Estimator for generalization performance of machine learning model trained by biased data collected from multiple references
Yuriko Okazaki; Shinichiro Okazaki; Shingo Asamoto; Toru Yamaji; Minoru Ishige
Computer-Aided Civil and Infrastructure Engineering, First page：early view, Mar. 2023, [Reviewed]
Wiley, English, Scientific journal
DOI：https://doi.org/10.1111/mice.12992
DOI ID：10.1111/mice.12992, ISSN：1093-9687, ORCID：132635878 - Experimental study on mortar with the addition of hydrophobic silicone oil for water absorption, strength, and shrinkage
Yao Luan; Shingo Asamoto
Construction and Building Materials, Volume：367, First page：130323, Last page：130323, Feb. 2023, [Reviewed], [Last]
Elsevier {BV}, English, Scientific journal
DOI：https://doi.org/10.1016/j.conbuildmat.2023.130323
DOI ID：10.1016/j.conbuildmat.2023.130323, ISSN：0950-0618, ORCID：132635845 - Mesoscale simulation of compression-induced cracking and failure of ASR-damaged concrete with stirrup confinement
Jie Luo; Shingo Asamoto; Kohei Nagai
Engineering Fracture Mechanics, Volume：277, First page：108977, Last page：108977, Jan. 2023, [Reviewed]
Elsevier {BV}, English, Scientific journal
DOI：https://doi.org/10.1016/j.engfracmech.2022.108977
Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85143591881&origin=inward
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85143591881&origin=inward
DOI ID：10.1016/j.engfracmech.2022.108977, ISSN：0013-7944, ORCID：132635940, SCOPUS ID：85143591881 - An analytical investigation of bond deterioration between rebar and ASR/DEF-damaged concrete with and without stirrup confinement using 3D RBSM
Jie Luo; Shingo Asamoto; Kohei Nagai
Construction and Building Materials, Volume：351, First page：128923, Last page：128923, Oct. 2022, [Reviewed]
Elsevier BV, English, Scientific journal
DOI：https://doi.org/10.1016/j.conbuildmat.2022.128923
Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85136613293&origin=inward
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85136613293&origin=inward
DOI ID：10.1016/j.conbuildmat.2022.128923, ISSN：0950-0618, ORCID：132635972, SCOPUS ID：85136613293 - Mesoscopic simulation of crack propagation and bond behavior in ASR damaged concrete with internal/external restraint by 3D RBSM
Jie Luo; Yi Wang; Shingo Asamoto; Kohei Nagai
Cement and Concrete Composites, Volume：129, First page：104488, Last page：104488, May 2022, [Reviewed]
Elsevier BV, Scientific journal
DOI：https://doi.org/10.1016/j.cemconcomp.2022.104488
Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85126468039&origin=inward
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85126468039&origin=inward
DOI ID：10.1016/j.cemconcomp.2022.104488, ISSN：0958-9465, ORCID：109731917, SCOPUS ID：85126468039 - Investigation of the mechanical behaviour of concrete with severe delayed ettringite formation expansion focusing on internal damage propagation under various compressive loading patterns
Nirmal Raj Joshi; Ayumu Matsumoto; Shingo Asamoto; Taito Miura; Yuichiro Kawabata
Cement and Concrete Composites, Volume：128, First page：104433, Last page：104433, Apr. 2022, [Reviewed], [Corresponding]
Elsevier BV, Scientific journal
DOI：https://doi.org/10.1016/j.cemconcomp.2022.104433
DOI ID：10.1016/j.cemconcomp.2022.104433, ISSN：0958-9465, ORCID：107474875 - Multiscale structural changes and drying shrinkage of Portland cement pastes: effects of a fatty-alcohol-based shrinkage reducing agent
Keisuke Takahashi; Kunio Matsui; Shingo Asamoto; Naoki Sakamoto
Materials and Structures, Volume：55, Number：2, Mar. 2022, [Reviewed]
Springer Science and Business Media {LLC}, English, Scientific journal
DOI：https://doi.org/10.1617/s11527-022-01889-w
DOI ID：10.1617/s11527-022-01889-w, ISSN：1359-5997, eISSN：1871-6873, ORCID：132636076 - Microstructural properties and water penetration resistance of cementitious binder combined with water-dispersible polyurethane
Keisuke Takahashi; Shingo Asamoto; Makoto Babazono; Yoshinori Matsuda
Cement and Concrete Composites, Volume：125, First page：104326, Last page：104326, Jan. 2022, [Reviewed]
Elsevier {BV}, Scientific journal
DOI：https://doi.org/10.1016/j.cemconcomp.2021.104326
DOI ID：10.1016/j.cemconcomp.2021.104326, ORCID：102575102 - The Cover Depth Effect on Corrosion-Induced Deterioration of Reinforced Concrete Focusing on Water Penetration: Field Survey and Laboratory Study
Shingo Asamoto; Junya Sato; Shinichiro Okazaki; Pang-jo Chun; Raktipong Sahamitmongkol; Giang Hoang Nguyen
Materials, Volume：14, Number：13, First page：3478, Last page：3478, Jun. 2021, [Reviewed], [Lead, Corresponding]
Reinforced concrete bridges were visually surveyed in Japan, Thailand, and Vietnam to study the deterioration caused by internal steel corrosion under different climates, focusing on the concrete cover depth. Spalling or cracking arising from corrosion is likely where water is supplied. According to prior studies and our surveys, a concrete cover depth of more than 40 mm was found to prevent spalling, regardless of environmental conditions and structure age. Because water supply at steel is a key corrosion factor, it was hypothesised that under natural conditions, the water penetration in concrete would remain at a depth of approximately 40 mm. Our laboratory study examined water penetration under drying and wetting conditions. The results also suggested that under periodic rainfall conditions, the threshold of water penetration was not exceeded. The numerical study indicated maximum moisture evaporation to facilitate oxygen diffusion occurred at a depth of approximately 30–40 mm unless the concrete was exposed to continuous drying for more than one month. It was experimentally and numerically concluded that an adequate cover depth of greater than 40 mm could inhibit moisture and oxygen penetration at the steel, which supported the survey findings of cover depth effect on a high resistance to corrosion-induced deterioration despite an increase in service life.
MDPI AG, English, Scientific journal
DOI：https://doi.org/10.3390/ma14133478
DOI ID：10.3390/ma14133478, ISSN：1996-1944, eISSN：1996-1944, ORCID：99902223 - Present status and issues of control technology for cracking of mass concrete in Japan
Toshiaki Mizobuchi; Shingo Asamoto
RILEM Technical Letters, Volume：6, First page：25, Last page：35, May 2021, [Reviewed]
This paper presents the current state of the control technology for cracks caused by heat generation due to the hydration of cement during construction in Japan. For the prediction analysis for thermal cracking of mass concrete, this paper presents the CP method that was developed for the first time in the world, the thermal cracking probability, the simple evaluation method that can predict and estimate the thermal cracking without performing complicated analysis and the evaluation method for expansive materials using the mechanical energy conservation hypothesis. In addition, issues are introduced for the next revision of the guidelines.
Rilem Publications {SARL}, Scientific journal
DOI：https://doi.org/10.21809/rilemtechlett.2021.137
DOI ID：10.21809/rilemtechlett.2021.137, ISSN：2518-0231, eISSN：2518-0231, ORCID：99902171 - Time-Dependent Deformation of a Concrete Arch Dam in Thailand - Numerical Study on Effect of Alkali Silica Reaction on Deflection of Arch
Nirmal R. Joshi; Thanadet Sriprasong; Shingo Asamoto; Pakawat Sancharoen
Journal of Advanced Concrete Technology, Volume：19, Number：3, First page：181, Last page：195, Mar. 2021, [Reviewed], [Corresponding]
Japan Concrete Institute, English, Scientific journal
DOI：https://doi.org/10.3151/jact.19.181
DOI ID：10.3151/jact.19.181, ISSN：1346-8014, eISSN：1347-3913, ORCID：99902249 - DEF膨張が生じたコンクリートの圧縮応力下での内部損傷進行の検討
松本歩; JOSHI Nirmal Raj; 浅本晋吾; 川端雄一郎
Volume：43, 2021, [Reviewed]
ISSN：2424-0281, J-Global ID：202102230064430839 - PRACTICAL PREDICTION MODEL VERIFICATION AND REGRESSION ANALYSIS BY MACHINE LEARNING USING CONCRETE DRYING SHRINKAGE DATABASE
石毛成; 浅本晋吾; 岡崎百合子; 岡崎慎一郎
AI・データサイエンス論文集(Web), Volume：2, Number：J2, 2021, [Reviewed], [Corresponding]
ISSN：2435-9262, J-Global ID：202202263621386215 - Undersampling Strategy for Machine-learned Deterioration Regression Model in Concrete Bridges
Yuriko Okazaki; Shinichiro Okazaki; Shingo Asamoto; Pang-jo Chun
Journal of Advanced Concrete Technology, Volume：18, Number：12, First page：753, Last page：766, Dec. 2020, [Reviewed]
Japan Concrete Institute, English, Scientific journal
DOI：https://doi.org/10.3151/jact.18.753
DOI ID：10.3151/jact.18.753, ISSN：1346-8014, ORCID：99902260 - STUDY ON THE COMBINED ALKALI SILICA REACTION AND DELAYED ETTRINGITE FORMATION
Thanadet Sriprasong
International Journal of GEOMATE, Volume：19, Number：75, Nov. 2020, [Reviewed], [Corresponding]
International Journal of Geomate, Scientific journal
DOI：https://doi.org/10.21660/2020.75.38051
DOI ID：10.21660/2020.75.38051, ISSN：2186-2982, ORCID：99902394 - Applicability of machine learning to a crack model in concrete bridges
Yuriko Okazaki; Shinichiro Okazaki; Shingo Asamoto; Pang jo Chun
Computer-Aided Civil and Infrastructure Engineering, Volume：35, Number：8, First page：775, Last page：792, Aug. 2020, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.1111/mice.12532
Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85078732704&origin=inward
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85078732704&origin=inward
DOI ID：10.1111/mice.12532, ISSN：1093-9687, eISSN：1467-8667, ORCID：69306406, SCOPUS ID：85078732704, Web of Science ID：WOS:000508563800001 - A mesoscale discrete model for mechanical performance of concrete damaged by coupled ASR and DEF
Yi Wang; Punyawut Jiradilok; Kohei Nagai; Shingo Asamoto
Engineering Fracture Mechanics, Volume：232, First page：107055, Last page：107055, Jun. 2020, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.1016/j.engfracmech.2020.107055
Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85084063351&origin=inward
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85084063351&origin=inward
DOI ID：10.1016/j.engfracmech.2020.107055, ISSN：0013-7944, eISSN：1873-7315, ORCID：99902298, SCOPUS ID：85084063351, Web of Science ID：WOS:000536482400007 - Regression analysis of concrete shrinkage and creep laboratory data by machine learning
浅本晋吾; 岡崎百合子; 岡崎慎一郎; CHUN Pang-jo
AI・データサイエンス論文集(Web), Volume：1, Number：J1, 2020, [Reviewed], [Lead, Corresponding]
ISSN：2435-9262, J-Global ID：202102260048305615 - 高級アルコール系収縮低減剤が極初期材齢の細孔構造に及ぼす影響と乾燥収縮の抑制との関係
高橋恵輔; 松井久仁雄; 浅本晋吾
Volume：42, 2020, [Reviewed]
ISSN：2424-0281, J-Global ID：202002232799474938 - Evaluation of Autoclaved Aerated Concrete Fines for Removal of Cd(II) and Pb(II) from Wastewater
G. M.P. Kumara; Ken Kawamoto; Takeshi Saito; Shoichiro Hamamoto; Shingo Asamoto
Journal of Environmental Engineering (United States), Volume：145, Number：11, Nov. 2019, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.1061/(ASCE)EE.1943-7870.0001597
Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85071765777&origin=inward
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85071765777&origin=inward
DOI ID：10.1061/(ASCE)EE.1943-7870.0001597, ISSN：0733-9372, eISSN：1943-7870, ORCID：62552645, SCOPUS ID：85071765777, Web of Science ID：WOS:000486511200004 - Expansive cracking and compressive failure simulations of ASR and DEF damaged concrete using a mesoscale discrete model
Yi Wang; Yushi Meng; Punyawut Jiradilok; Koji Matsumoto; Kohei Nagai; Shingo Asamoto
Cement and Concrete Composites, Volume：104, Nov. 2019, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.1016/j.cemconcomp.2019.103404
Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85071619029&origin=inward
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85071619029&origin=inward
DOI ID：10.1016/j.cemconcomp.2019.103404, ISSN：0958-9465, eISSN：1873-393X, ORCID：62552290, SCOPUS ID：85071619029, Web of Science ID：WOS:000501649500069 - コンクリート橋梁のひび割れ損傷に対する回帰モデルに適した機械学習アルゴリズムの選択
岡崎 百合子; 岡崎 慎一郎; 浅本 晋吾; 全 邦釘
Volume：41, Number：1, First page：581, Last page：586, Sep. 2019, [Reviewed]
Japanese
ISSN：2424-0281, J-Global ID：201902227102153897 - Concrete cold joint formation in hot weather conditions
Gayan Buddhika Illangakoon; Shingo Asamoto; Anura Nanayakkara; Lam Nguyen Trong
Construction and Building Materials, Volume：209, First page：406, Last page：415, Jun. 2019, [Reviewed], [Corresponding]
English, Scientific journal
DOI：https://doi.org/10.1016/j.conbuildmat.2019.03.093
Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85062859933&origin=inward
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85062859933&origin=inward
DOI ID：10.1016/j.conbuildmat.2019.03.093, ISSN：0950-0618, eISSN：1879-0526, ORCID：55348635, SCOPUS ID：85062859933, Web of Science ID：WOS:000468713000038 - Study on Strength and Characteristics of Cement Paste for Well Exposed to 200 °C
浅本晋吾; 塚原美晴; 伊藤貴康; 松井久仁雄
材料, Volume：68, Number：6, 2019, [Reviewed], [Lead, Corresponding]
ISSN：0514-5163, J-Global ID：201902285089283014 - Effects of fatty alcohol-based shrinkage reducing agents on early-age shrinkage under high temperature conditions
Keisuke Takahashi; Shingo Asamoto; Mari Kobayashi; Thomas Bier
Journal of Advanced Concrete Technology, Volume：17, Number：11, First page：648, Last page：658, 2019, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.3151/jact.17.648
Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85077467498&origin=inward
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85077467498&origin=inward
DOI ID：10.3151/jact.17.648, ISSN：1346-8014, eISSN：1347-3913, ORCID：69306426, SCOPUS ID：85077467498, Web of Science ID：WOS:000500240800004 - Sorption isotherm and length change behavior of autoclaved aerated concrete
Lam Nguyen Trong; Shingo Asamoto; Kunio Matsui
Cement and Concrete Composites, Volume：94, First page：136, Last page：144, Nov. 2018, [Reviewed], [Corresponding]
English, Scientific journal
DOI：https://doi.org/10.1016/j.cemconcomp.2018.09.003
Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85053374181&origin=inward
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85053374181&origin=inward
DOI ID：10.1016/j.cemconcomp.2018.09.003, ISSN：0958-9465, eISSN：1873-393X, ORCID：48086278, SCOPUS ID：85053374181, Web of Science ID：WOS:000451493000014 - Microstructure and shrinkage behavior of Autoclaved Aerated Concrete (AAC) -Comparison of Vietnamese and Japanese AACs-
Nguyen Trong Lam; Shingo Asamoto; Kunio Matsui
Journal of Advanced Concrete Technology, Volume：16, Number：8, First page：333, Last page：342, Aug. 2018, [Reviewed], [Corresponding]
English, Scientific journal
DOI：https://doi.org/10.3151/jact.16.333
Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85052108041&origin=inward
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85052108041&origin=inward
DOI ID：10.3151/jact.16.333, ISSN：1346-8014, eISSN：1347-3913, ORCID：62552516, SCOPUS ID：85052108041, Web of Science ID：WOS:000444853300002 - インドで発生したPC枕木のひび割れの原因究明とASRおよびDEFの相互作用
安藤陽子; 片山哲哉; 浅本晋吾; 長井宏平
Volume：40, 2018, [Reviewed]
ISSN：2424-0281, J-Global ID：201802244599310725 - Study on internal water repellency and mechanical characteristics of cementitious materials with the addition of hydrophobic agent
Asamoto Shingo; Furuta Haruka; Luan Yao; Yoneda Taiju
Concrete Research and Technology, Volume：29, Number：0, First page：11, Last page：19, 2018, [Reviewed], [Lead, Corresponding]In order to inhibit water penetration into concrete, hydrophobic surface impregnation is generally used to protect concrete, but there is concern that water repellency may decrease greatly when cracks occur. This study aims to develop an internal hydrophobic cementitious material by mixing several hydrophobic agents. Two mixing methods of the agents, direct mixing and sand spraying, were carried out. It was found that mortar with sand sprayed with silicone-based agent had a relatively high contact angle and hydrophobicity under wetting and drying cycles even if cracks occurred, although compressive strength decreased to some extent. Further, mortar with the addition of an alkyl-modified siloxane agent could greatly inhibit the water penetration after partial drying, and drying shrinkage was also found to be smaller than that of normal mortar.
Japan Concrete Institute, Japanese
DOI：https://doi.org/10.3151/crt.29.11
DOI ID：10.3151/crt.29.11, ISSN：1340-4733, CiNii Articles ID：130006309080 - Reviews on the applicability of construction and demolition waste as low-cost adsorbents to remove-heavy metals in wastewater
G. M.P. Kumara; Takashi Saito; Shingo Asamoto; Ken Kawamoto
International Journal of GEOMATE, Volume：14, Number：42, First page：44, Last page：51, 2018, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.21660/2018.42.7148
Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85040908556&origin=inward
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85040908556&origin=inward
DOI ID：10.21660/2018.42.7148, ISSN：2186-2982, eISSN：2186-2990, ORCID：62552537, SCOPUS ID：85040908556, Web of Science ID：WOS:000429528700008 - CRACK PROPERGATION MODEL OF CONCRETE BRIDGES IN SHIKOKU BASED DATA DRIVEN APPROACH
岡崎百合子; 岡崎慎一郎; CHUN Pang-jo; 浅本晋吾; 大窪和明
土木学会論文集 F4(建設マネジメント)(Web), Volume：74, Number：4, First page：I_107, Last page：I_118, 2018, [Reviewed]
Japanese
ISSN：2185-6605, J-Global ID：201902262620823617 - データ駆動型アプローチによるコンクリート橋梁のひび割れ発生・進展の回帰モデルの構築および要因分析
岡崎 百合子; 岡崎 慎一郎; 全 邦釘; 浅本 晋吾
Volume：40, Number：2, First page：1381, Last page：1386, 2018, [Reviewed]
Japanese
ISSN：2424-0281, J-Global ID：201802269745598532 - Effect of carbonate ions on delayed ettringite formation
Shingo Asamoto; Kohki Murano; Isao Kurashige; Anura Nanayakkara
Construction and Building Materials, Volume：147, First page：221, Last page：226, Aug. 2017, [Reviewed], [Lead, Corresponding]
English, Scientific journal
DOI：https://doi.org/10.1016/j.conbuildmat.2017.04.107
Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85018904156&origin=inward
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85018904156&origin=inward
DOI ID：10.1016/j.conbuildmat.2017.04.107, ISSN：0950-0618, eISSN：1879-0526, ORCID：32263208, SCOPUS ID：85018904156, Web of Science ID：WOS:000403854100022 - Investigation on possible causes of expansion damages in concrete – a case study of sleepers in Indian Railways
Anupam Awasthi; Koji Matsumoto; Kohei Nagai; Shingo Asamoto; Seishi Goto
Volume：3, Number：1, First page：49, Last page：66, Jul. 2017, [Reviewed]
DOI：https://doi.org/10.18702/acf.2017.06.3.1.49
DOI：https://doi.org/10.1016/j.engfracmech.2020.107055_references_DOI_AqmJ6XWu5iIgqxa3LaaUI7BmtcO
DOI ID：10.18702/acf.2017.06.3.1.49, ISSN：2465-7964, eISSN：2465-7972 - 各種撥水材を活用したセメント系材料の内部撥水性の評価と材料特性の検討
古田悠佳; 欒堯; 浅本晋吾; 米田大樹
Volume：38, 2016, [Reviewed]
ISSN：2424-0281, J-Global ID：201702231789691792 - 遅延エトリンガイト生成に及ぼす炭酸イオンの影響に関する検討
浅本晋吾; 村野耕基; 蔵重勲; NANAYAKKARA Anura
Volume：38, 2016, [Reviewed], [Lead]
ISSN：2424-0281, J-Global ID：201702269523539606 - 200°Cに曝露された坑井セメントペーストの物性変化に基づく強度特性の検討
塚原美晴; 浅本晋吾
Volume：38, 2016, [Reviewed]
ISSN：2424-0281, J-Global ID：201702239664170841 - Study on Pore Structure and Air Permeability Variations by Carbonation of Cementitious Materials Exposed to Supercritical CO2
ASAMOTO Shingo; HIRAI Ryosuke
Journal of the Society of Materials Science, Japan, Volume：65, Number：2, First page：155, Last page：161, 2016, [Reviewed], [Lead, Corresponding]
CCS (Carbon dioxide Capture and Storage) projects have been focused on as one of state-of-art technologies to prevent the CO2 emission in the atmosphere. In a project, the CO2 collected from factories is injected into the geological reservoir at deep underground through well and stored in the reservoir. It is expected that the well will have gradual degradations due to high temperature, high pressure and high concentration CO2 at deep underground. The process of the degradations should be investigated to prevent from leaking the CO2 through the well. In this study, the variation of pore structure and air permeability by the carbonation of the hardened cement paste exposed to the supercritical CO2 under water, salt water and sealed condition was examined focusing on the carbonation progress. The pore structure of small sample (diameter 4mm and height 4 mm) became denser at 1 day of exposure all cases because of the precipitation of CaCO3 in capillary pores while the carbonation of C-S-H occurred at 7 days to make pores coarse in the case of supercritical CO2 in water. It was experimentally found that the slight carbonation makes pores denser and leads to the reduction of the air permeability. The hardened cement paste using oil well cement with fly ash had denser pore structure to make permeability smaller than that using only oil well cement. It is attributed to Pozzolanic reaction of fly ash at high temperature. Thus, it was suggested that fly ash has a potential to apply to the CCS well from a view point of the prevention of CO2 gas leakage.
The Society of Materials Science, Japan, Japanese
DOI：https://doi.org/10.2472/jsms.65.155
DOI ID：10.2472/jsms.65.155, ISSN：0514-5163, J-Global ID：201602213756571410, CiNii Articles ID：130005126270, CiNii Books ID：AN00096175 - Effect of creep induction at an early age on subsequent prestress loss and structural response of prestressed concrete beam
Shingo Asamoto; Kyosuke Kato; Takeshi Maki
Construction and Building Materials, Volume：70, First page：158, Last page：164, Nov. 2014, [Reviewed], [Lead, Corresponding]
English, Scientific journal
DOI：https://doi.org/10.1016/j.conbuildmat.2014.07.028
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=84906546016&origin=inward
DOI ID：10.1016/j.conbuildmat.2014.07.028, ISSN：0950-0618, eISSN：1879-0526, ORCID：25696227, SCOPUS ID：84906546016, Web of Science ID：WOS:000343337500018 - 混合セメントを用いたRC部材の持続荷重下の曲げひび割れ進展に対する養生日数,乾湿繰り返しの影響
浅本晋吾; 横井太一; 平林雅也; 小林薫
Volume：36, 2014, [Reviewed], [Lead]
ISSN：2424-0281, J-Global ID：201402203840611736 - INFLUENCE OF HIGH TEMPRATURE HISTORY ON MECHANICAL PROPERTIES OF CEMENTITIOUS MATERIALS WITH LOW WATER-TO-BINDER RATIO
MURANO Koki; ASAMOTO Shingo; KURASHIGE Isao; MINATO Daisuke
Cement Science and Concrete Technology, Volume：68, Number：1, First page：140, Last page：147, 2014, [Reviewed]
In this study, the effect of high temperature history arising from the hydration heat on mechanical properties of concrete with low water-to-binder ratio was experimentally investigated. Cement paste and mortar specimens using Ordinary Portland cement, slag cement and fly ash cement were exposed to constant temperatures（20℃ and 80℃）and fictitious temperature rise at early age due to the hydration reaction under sealing conditions soon after casting. At an age of 28 days, mercury intrusion porosimetry test and compressive strength test were carried out for each specimen to compare different temperature histories and cement types. The compressive strength of cement paste with mineral admixture at 28 days of age was increased when it was exposed high temperature. It is attributed to the promotions of latent hydraulic reactions of slag and pozzolanic reaction of fly ash under high temperature. The mercury intrusion porosimetry test revealed denser porosity of cement paste exposed to high temperature than that of cement paste cured at 20℃. The compressive strength of mortar cured at 80℃ was reduced in all cement cases. It is speculated that the continuous high temperature exposure may make interfacial transition zone between cement paste and aggregate damaged due to the self-desiccation under high temperature. In addition, the compressive strength of mortar with high temperature rise at an early age was reduced at an age of 91 ages comparing to the strength at an age of 28 days in all cases. It is suggested that the strength of mortar with low water-to-binder ratio may be gradually decreased when it has a high temperature history at an early age.
Japan Cement Association, Japanese
DOI：https://doi.org/10.14250/cement.68.140
DOI ID：10.14250/cement.68.140, ISSN：0916-3182, CiNii Articles ID：130005129354 - Well integrity assessment for CO2 injection: A numerical case study on thermo-mechanical behavior in downhole CO2 environments
Shingo Asamoto; Yvi Le Guen; Olivier Poupard; Bruno Capra
Engineering Computations (Swansea, Wales), Volume：30, Number：6, First page：842, Last page：853, Aug. 2013, [Reviewed], [Lead, Corresponding]
English, International conference proceedings
DOI：https://doi.org/10.1108/EC-05-2012-0117
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=84883398285&origin=inward
DOI ID：10.1108/EC-05-2012-0117, ISSN：0264-4401, eISSN：1758-7077, ORCID：20393214, SCOPUS ID：84883398285, Web of Science ID：WOS:000324897000007 - 超臨界二酸化炭素に曝露されたセメント硬化体の炭酸化進行および空隙構造変化に関する研究
平井遼介; 磯崎光; 浅本晋吾
Volume：35, 2013, [Reviewed]
ISSN：2424-0281, J-Global ID：201302276411769127 - STUDY ON VOLUMETRIC CHANGE MECHANISM OF HARDENED CEMENT PASTE BASED ON LIQUID CHARACTERISTICS IN FINE PORES
ASAMOTO Shingo; MATSUI Kunio; KATO Kyosuke
Cement Science and Concrete Technology, Volume：67, Number：1, First page：195, Last page：202, 2013, [Reviewed], [Lead]
In this study, the authors investigate the volumetric change of hardened cement paste when the dried specimens under various conditions are soaked in different polar or non-polar liquids. The objective is to comprehend the dominant phenomena to cause the shrinkage of the cement paste based on liquid characteristics. When the oven dried specimens are submerged in various liquids other than water, the shrinkage due to the oven dry is hardly recovered while the shrinkage of the specimens is almost recovered by submerging in water. This could be because the adsorption of the liquids to cement paste is much smaller than that of water and could have little reduction of the solid surface energy of cement paste. The large shrinkage is observed after moist-cured specimens are soaked in polar solvents which are dissolved in water. It could be attributed to the decrease of disjoining pressure and increase of solid surface energy due to the absorption of liquid water and adsorbed water in fine pores and C-S-H gel. The shrinkage of partially dried specimens is recovered soon after soaking in both polar and non-polar liquids. It is speculated that the decrease of capillary tension or the increase of disjoining pressure cause the immediate recovery of the shrinkage.
Japan Cement Association, Japanese
DOI：https://doi.org/10.14250/cement.67.195
DOI ID：10.14250/cement.67.195, ISSN：0916-3182, J-Global ID：201402221054628070, CiNii Articles ID：130004745753 - Characteristic of Chloride Ion Diffusion in Mortar Mixed with Ion-Exchange Resin
Sanada Osamu; Mutsuyoshi Hiroshi; Asamoto Shingo; Inoue Nobuhito
Concrete Research and Technology, Volume：24, Number：3, First page：123, Last page：134, 2013, [Reviewed]
Recently, a number of concrete structures constructed several decades earlier are showing significant degradation, especially in coastal areas. For the effective repair and reinforcement of such structures, the development of high performance repairing material is required. Meanwhile, ion exchange resin has traditionally been used to remove impurities such as chloride in the process of cleaning industrial wastewater and manufacturing pure water. In this study, for the purpose of removing the chloride in deteriorated concrete structures, the application of ion exchange resin to repairing material is investigated. Firstly, the effect of ion exchange resin on the adsorption of chloride ion in mortar is examined by chemical analysis. The diffusion of chloride in mortar with ion exchange resin is experimentally and numerically studied. Finally, it is experimentally verified that the chloride in mortar is removed by inverse diffusion due to the ion exchange resin.
Japan Concrete Institute, Japanese
DOI：https://doi.org/10.3151/crt.24.123
DOI ID：10.3151/crt.24.123, ISSN：1340-4733, CiNii Articles ID：130003378375 - INVESTIGATION INTO EFFECT OF CURING TEMPEARTURE AND MINERAL ADMIXTURES ON SHRINKAGE CRACKING RESISTANCE BY ADVANCED SHRINKAGE RESTRAIN TEST
ASAMOTO Shingo; KATO Masanori; MAKI Takeshi; KURASHIGE Isao
Cement Science and Concrete Technology, Volume：66, Number：1, First page：95, Last page：102, 2012, [Reviewed], [Lead]
The authors consistently investigate the shrinkage cracking resistance of mortar containing blast furnace slag or fly ash, based on the proposed experimental method：it can intentionally induce a shrinkage crack in the drying area of small mortar specimens under restrained condition. In order to clarify the dominant material properties in shrinkage cracking, the water curing at 20℃ and the extreme condition of water curing at 60℃ were provided for each specimen to have the different pore structures. The shrinkage cracking resistance of mortar with blast furnace slag is likely to be reduced than that of mortar without mineral admixture or with fly ash as indicated in previous studies. The mortar cured in water at 60℃ without mineral admixture has higher shrinkage cracking resistance than the one cured in water at 20℃ has, while it takes a slightly long or not much different time to cause the shrinkage cracks on the mortar cured in water at 60℃ with slag compared to the one cured in water at 20℃. On the other hand, the stress was greatly decreased when the mortar with fly ash were dried after curing under water at 60℃. It is deduced that the dense pore structure of mortar with fly ash due to water curing at 60℃ could cause the shrinkage gradient from surface to internal and lead to micro-crack generation on the surface due to the internal confinement. It is concluded that the micro-crack could decrease the tensile strength and result in the reduction of shrinkage cracking resistance.
Japan Cement Association, Japanese
DOI：https://doi.org/10.14250/cement.66.95
DOI ID：10.14250/cement.66.95, ISSN：0916-3182, J-Global ID：201302249296221786, CiNii Articles ID：130004574772 - Well Integrity: Modeling of Thermo-Mechanical Behavior and Gas Migration along Wells-Application to Ketzin Injection Well
Le Guen Yvi; Asamoto Shingo; Houdu Emmanuel; Poupard Olivier
Energy Procedia, Volume：23, First page：462, Last page：471, 2012
Scientific journal
DOI：https://doi.org/10.1016/j.egypro.2012.06.042
Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84897135551&origin=inward
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=84897135551&origin=inward
DOI ID：10.1016/j.egypro.2012.06.042, ISSN：1876-6102, ORCID：20393216, SCOPUS ID：84897135551, Web of Science ID：WOS:000314116000046 - Study on effects of solar radiation and rain on shrinkage, shrinkage cracking and creep of concrete
Shingo Asamoto; Ayumu Ohtsuka; Yuta Kuwahara; Chikako Miura
Cement and Concrete Research, Volume：41, Number：6, First page：590, Last page：601, Jun. 2011, [Reviewed], [Lead, Corresponding]
English, Scientific journal
DOI：https://doi.org/10.1016/j.cemconres.2011.03.003
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=79955476911&origin=inward
DOI ID：10.1016/j.cemconres.2011.03.003, ISSN：0008-8846, ORCID：20393217, SCOPUS ID：79955476911, Web of Science ID：WOS:000291298000003 - 浸漬熱と吸着測定によるセメントペーストと軽量気泡コンクリートの細孔構造の比較
松井久仁雄; 浅本晋吾
Volume：33, 2011, [Reviewed]
ISSN：2424-0281, J-Global ID：201102203569685069 - 養生・乾燥温度に依存する混和材混入モルタルの収縮特性に関する研究
辻貴大; 加藤優典; 浅本晋吾; 蔵重勲
Volume：33, 2011, [Reviewed]
ISSN：2424-0281, J-Global ID：201102250877915227 - Structural behavior of hybrid FRP composite I-beam
Nguyen Duc Hai; Hiroshi Mutsuyoshi; Shingo Asamoto; Takahiro Matsui
Construction and Building Materials, Volume：24, Number：6, First page：956, Last page：969, Jun. 2010, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.1016/j.conbuildmat.2009.11.022
Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=77949570810&origin=inward
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=77949570810&origin=inward
DOI ID：10.1016/j.conbuildmat.2009.11.022, ISSN：0950-0618, ORCID：20393218, SCOPUS ID：77949570810, Web of Science ID：WOS:000277781000012 - Study on Shrinkage and Shrinkage Cracking Behavior of Concrete under Actual Environmental Condition
ASAMOTO Shingo; OHTSUKA Ayumu; MIURA Chikako; KUWAHARA Yuta
Concrete Research and Technology, Volume：21, Number：2, First page：35, Last page：43, May 2010, [Reviewed], [Lead]
In this study, the influences of both rain and solar radiation on shrinkage and shrinkage cracking under actual environmental conditions are investigated. Moisture loss, shrinkage, shrinkage cracks were measured under three different outdoor conditions in order to examine the effects of rain and solar radiation separately. It was experimentally found that the penetration of rain into concrete greatly inhibits moisture loss, shrinkage and shrinkage cracking. While the solar radiation accelerates the evaporation of moisture in concrete, shrinkage of plain concrete cannot increase so much due to the drying but shrinkage cracking can be significantly promoted by solar radiation. It is concluded that the actual environmental actions such as rain and solar radiation should be taken into account in design in order to appropriately predict the deterioration of concrete structure.
Japan Concrete Institute, Japanese
DOI：https://doi.org/10.3151/crt.21.2_35
DOI ID：10.3151/crt.21.2_35, ISSN：1340-4733, J-Global ID：201002272452659207, CiNii Articles ID：10026450743, CiNii Books ID：AN1053282X - 固体表面に吸着する液体特性に依存するセメント硬化体の体積変化
浅本晋吾; 宮腰良太; 辻貴大; 松井久仁雄
Volume：32, 2010, [Reviewed], [Lead]
ISSN：2424-0281, J-Global ID：201002240177955195 - 高炉スラグ微粉末を用いたモルタル供試体の水分逸散と収縮特性に与える養生及び乾燥温度履歴の影響
加藤優典; 辻貴大; 浅本晋吾
Volume：32, 2010, [Reviewed]
ISSN：2424-0281, J-Global ID：201002299303714659 - 超高強度コンクリートを用いたRC梁のせん断性状
武田亮祐; 睦好宏史; 浅本晋吾; 渡邉光
Volume：32, 2010, [Reviewed]
ISSN：2424-0281, J-Global ID：201002215465890150 - AN INVESTIGATION INTO WATER BEHAVIOR IN MICROPORES BASED ON MOLECULAR DYNAMICS SIMULATION
OKAZAKI Shinichiro; ASAMOTO Shingo; KISHI Toshiharu
Journal of Japan Society of Civil Engineers, Ser. E1 (Pavement Engineering), Volume：65, Number：3, First page：311, Last page：321, 2009, [Reviewed]
For estimation of durability of concrete, it is important to understand the behavior of liquid water in micro pores. It is well-known that water permeability in concrete can be idealized by Darcy's law and water penetration is usually calculated based on the permeability coefficient. It was found, however, that there exists a non-linear relationship between permeation of water and hydraulic gradient through the Output-Method permeability test under different pressures and the friction phenomenon of water movement in fine pores was suggested. This research reveals that such static and kinetic friction behavior between micro pores and water were clarified using a molecular dynamics (MD) simulation.
Japan Society of Civil Engineers, Japanese
DOI：https://doi.org/10.2208/jsceje.65.311
DOI ID：10.2208/jsceje.65.311, ISSN：1880-6066, J-Global ID：200902284956097649, CiNii Articles ID：80020392067 - 内部液体特性に基づく多孔質材料の体積変化機構に関する研究
加藤恭介; 浅本晋吾; 松井久仁雄
コンクリート工学年次論文集, Volume：Vol.31, Number：No.1, First page：619, Last page：624, 2009, [Reviewed]
ISSN：2424-0281, J-Global ID：201002213930818573 - Investigations into volumetric stability of aggregates and shrinkage of concrete as a composite
Shingo Asamoto; Tetsuya Ishida; Koichi Maekawa
Journal of Advanced Concrete Technology, Volume：6, Number：1, First page：77, Last page：90, Feb. 2008, [Reviewed], [Lead]
English, Scientific journal
DOI：https://doi.org/10.3151/jact.6.77
Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=77949350383&origin=inward
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=77949350383&origin=inward
DOI ID：10.3151/jact.6.77, ISSN：1346-8014, eISSN：1347-3913, CiNii Articles ID：130000080438, ORCID：20393226, SCOPUS ID：77949350383, Web of Science ID：WOS:000255404000005 - 3138 SHEAR CRACKING BEHAVIOR OF ULTRA-HIGH-STRENGTH PRESTRESSED REINFORCED CONCRETE BEAMS :
DE SILVA Sudhira; MUTSUYOSHI Hiroshi; ASAMOTO Shingo; MAEKAWA Atsushi
Proceedings of the Japan Concrete Institute, Volume：Vol.30, Number：No.3, First page：823, Last page：828, 2008, [Reviewed]
English
ISSN：1347-7560, CiNii Articles ID：110009697879, CiNii Books ID：AA12600419 - 超高強度コンクリートを用いたPRC梁のひび割れ性状
前川敦; 睦好宏史; S. Silvia; 浅本晋吾
Volume：Vol.30, Number：No.3, First page：637, Last page：642, 2008, [Reviewed]
本研究では,160N/mm^2を超える超高強度コンクリートの曲げおよびせん断ひび割れ特性を明らかにするためRCおよびPRC梁の載荷実験を行い,普通強度コンクリートのひび割れ挙動との比較・検討を行った。高強度コンクリートのひび割れは骨材を貫通して進展するため,ひび割れ幅のばらつきが普通強度コンクリートと比べ大きくなった。また,初期のひび割れ幅が普通強度に比べ大きく,それに伴い曲げひび割れ幅は大きくなることが確認された。せん断挙動は非常に脆性的な破壊となり,せん断補強鉄筋の破断が観察された。せん断ひび割れ幅に関しては,超高強度コンクリートを用いたPRC部材で小さくなることが確認された。
Japanese
ISSN：1347-7560, J-Global ID：200902259141379874, CiNii Articles ID：110009697848, CiNii Books ID：AA12600419 - Corrosion of reinforcements in RC and PRC beams by electrically accelerated corrosion test
KAWANA Keiko; NISHIOKA Tomoki; MUTSUYOSHI Hiroshi; ASAMOTO Shingo
Proceedings of the Japan Concrete Institute, Volume：Vol.30, Number：No.1, First page：825, Last page：830, 2008, [Reviewed]
本研究は,ひび割れを人為的に導入したRC部材よびPRC部材を対象に,腐食促進実験を行って各部材の劣化メカニズムについて実験的検討を行い,鋼材腐食による劣化後の供試体の状態を実環境下における供用年数と関連付けるために,Fickの拡散則やファラデーの法則を用いて解析的検討を行った。その結果,腐食環境下においては,ひび割れの発生を許容するRC部材に比べ,ひび割れ幅を制御することができるPRC部材の方が銅材腐食の進行を抑制できることが明らかとなった。飛沫帯環境下で供用されたと仮定した場合,PRC供試体は通電を開始してから,2週間で実構造物の約32年間に相当することが確認された。
Japanese
ISSN：1347-7560, J-Global ID：200902215782854141, CiNii Articles ID：110009697535, CiNii Books ID：AA12600419 - 1076 Influence of Rain and Sun Radiation on Shrinkage Behavior of Concrete
OTSUKA Ayumu; MIURA Chikako; ASAMOTO Shingo; MUTSUYOSHI Hiroshi
Proceedings of the Japan Concrete Institute, Volume：Vol.30, Number：No.1, First page：501, Last page：506, 2008, [Reviewed]
本研究では,貝射および降雨がコンクリートの収縮に与える影響の抽出を目的に系統的な実験を行った。環境条件が異なる三ヶ所の屋外環境に供試体を暴露し収縮の経時変化を計測した結果,降雨浸透によって収縮が大きく抑制されることが確認された。また,コンクリートの収縮ひずみが概ね等しい場合でも,乾燥を促進する日射の有無によって表面の収縮ひび割れ発生に顕著な差が現れることが分かった。さらに,既存の収縮予測式との比較を通じ,乾燥中に計測した平均湿度では雨水浸透による収縮回復の予測は難しく,境界条件によって異なる収縮挙動を予測するには局所的な降雨の影響を考慮する必要があることが分かった。
Japanese
ISSN：1347-7560, J-Global ID：200902227094184840, CiNii Articles ID：110009697481, CiNii Books ID：AA12600419 - 長期屋外乾燥させたPRC梁の曲げひび割れ性状に関する研究
浅本晋吾; 篠崎裕生; 三上浩; 睦好宏史
Volume：Vol.30, Number：No.3, First page：559, Last page：565, 2008, [Reviewed], [Lead]
本研究は,PRC梁を約1年半屋外で乾燥させたときの時間依存変形挙動,収縮ひび割れ,および乾燥後の曲げひび割れ性状について検討を行った。収縮ひび割れ進展を含む時間依存変形挙動について,材料と構造解析を組み合わせたマルチスケール統合解析システムで検討を行った結果,目視で確認できない微細ひび割れの存在が示唆された。また,膨張材及びビニロン短繊維を混入した際の収縮ひび割れ抑制,曲げひび割れ特性について実験的検討を行い,収縮ひび割れ抑制には膨張材が効果的であり,わずかな短繊維混入は曲げひび割れ性状に対しては影響が小さいが,ひび割れ発生後の曲げ剛性向上には寄与することが分かった。
Japanese
ISSN：1347-7560, J-Global ID：200902266454849258, CiNii Articles ID：110009697835, CiNii Books ID：AA12600419 - Enhancement of RC Bridge Management System and Application to Actual bridges
TAKASE Hayato; MUTSUYOSHI Hiroshi; NODA Kazuhiro; ASAMOTO Shingo
Proceedings of the Japan Concrete Institute, Volume：Vol.29,No.3, Number：3, First page：1711, Last page：1716, 2007, [Reviewed]
本研究では,昨年度提案したRC橋梁健全度診断システムの高度化,及び実橋梁への適用範囲について検討を行った。健全度診断システム内で用いる重みを変更することで,目視による点検が困難な点検項目のある橋梁に対しての適用範囲拡大を試みた。点検未記入項を診断時に危険側に評価しないことにより,点検者によるばらつきを抑え,より妥当な健全度評価実現を図った。高度化した本診断システムの妥当性を検証するため,埼玉県の実RC橋梁に対し点検を行い,健全度を診断した°その結果,本診断システムは目視点検が困難な橋梁に対しても適用可能であることが確認され,健全度評価改善に成功した。
Japanese
ISSN：1347-7560, J-Global ID：200902251303419190, CiNii Articles ID：110009697391, CiNii Books ID：AA12600419 - 高強度コンクリートを用いたPRC梁におけるひび割れ特性
高木真由子; 睦好宏史; S. Silvia; 浅本晋吾
Volume：Vol.29,No.3, Number：3, First page：577, Last page：582, 2007, [Reviewed]
ISSN：1347-7560, J-Global ID：200902287150901188 - 膨張剤およびビニロン短繊維を用いたコンクリートのひび割れ特性に関する実験的研究
玉置一清; 睦好宏史; 浅本晋吾; 三上浩
Volume：Vol.29,No.1, Number：1, First page：807, Last page：812, 2007, [Reviewed]
本研究は,経済的なひび割れ制御の一方策として,収縮補償レベルの膨張材量および少量のビニロン短繊維混入の有効性を検証する目的で,の軸鉄筋拘束試験体を実環境下で暴露した後,引張試験を実施したものである。検討の結果,膨張材の効果は5ヶ月後においても持続し,定量的な評価が可能であること,ビニロン短繊維を少量混入した場合,テンションステフィニング効果としてはばらつきがあるものの,微細な初期ひび割れの影響を緩和する効果があることなどが明らかになった。
Japanese
ISSN：1347-7560, J-Global ID：200902263552221055, CiNii Articles ID：110009696863, CiNii Books ID：AA12600419 - 実環境作用に着目したコンクリートの収縮特性に関する研究
浅本晋吾; 玉置一清; 大塚歩; 睦好宏史
Volume：Vol.29,No.1, Number：1, First page：681, Last page：686, 2007, [Reviewed], [Lead]
本研究は,外気温・湿度変動,雨天,日射といった実環境作用がコンクリートの収縮挙動に与える影響に着目して検討を行った。温湿度変化が概ね等しい屋内外の各環境条件に供試体を暴露し収縮の経時変化を計測した結果,降雨による水分浸透の影響は大きく,屋内に比べ屋外の収縮量は小さいことが分かった。さらに,マルチスケール複合構成モデルの適用性を検討した結果,降雨の影響を除いた実環境作用下における収縮挙動は平均湿度境界条件で概ね追跡が可能であるが,雨天による局所的な収縮回復を再現するには降雨浸透境界モデルが必要であることがわかった。また,骨材自体の収縮特性の違いにより収縮挙動が異なることが示唆された。
Japanese
ISSN：1347-7560, J-Global ID：200902278505785398, CiNii Articles ID：110009696842, CiNii Books ID：AA12600419 - ANALYSIS OF CONCRETE SHRINKAGE COUPLING WITH PROPERTIES OF AGGREGATE
ASAMOTO Shingo; ISHIDA Tetsuya; MAEKAWA Koichi
Doboku Gakkai Ronbunshuu E, Volume：63, Number：2, First page：327, Last page：340, 2007, [Reviewed], [Lead]
In this research, authors aim to quantitatively understand the influence of various aggregate properties on behaviors of concrete shrinkage based on both experimental and numerical approach. A multi-scale constitutive model revealed that only difference of aggregate Young’s modulus cannot cause significantly different shrinkage behaviors of concrete. Thus, the shrinkage of aggregate itself was focused on and aggregate shrinkage model that depends on its surface area and saturation degree according to experimental results of previous researches was proposed. The proposed model can reasonably simulate largely different shrinkage behaviors of concrete with various types of aggregates.
Japan Society of Civil Engineers, Japanese
DOI：https://doi.org/10.2208/jsceje.63.327
DOI ID：10.2208/jsceje.63.327, ISSN：1880-6066, J-Global ID：200902258896811770, CiNii Articles ID：130004943117 - SHEAR CRACKING BEHAVIOR OF HIGH-STRENGTH PRESTRESSED REINFORCED CONCRETE BEAMS
Sudhira DE SILVA; MUTSUYOSH Hiroshi; ASAMOTO Shingo; TAKAGI Mayuko
Proceedings of the Japan Concrete Institute, Volume：29, Number：3, First page：679, Last page：684, 2007, [Reviewed]
English
ISSN：1347-7560, CiNii Articles ID：110009697219, CiNii Books ID：AA12600419 - Time-Dependent Constitutive Model of Solidifying Concrete Based on Thermodynamic State of Moisture in Fine Pores
Shingo Asamoto; Tetsuya Ishida; Koichi Maekawa
Journal of Advanced Concrete Technology, Volume：4, Number：2, First page：301, Last page：323, Jun. 2006, [Reviewed], [Lead]
Japan Concrete Institute, Scientific journal
DOI：https://doi.org/10.3151/jact.4.301
Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=33845640530&origin=inward
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=33845640530&origin=inward
DOI ID：10.3151/jact.4.301, ISSN：1346-8014, eISSN：1347-3913, CiNii Articles ID：130000080306, ORCID：20393227, SCOPUS ID：33845640530 - 温度履歴に依存するセメント硬化体の細孔内水分状態と体積変化機構の連関
浅本晋吾; 石田哲也
Volume：Vol.27, No.1, Number：1, First page：451, Last page：456, 2005, [Reviewed], [Lead]
本研究では,細孔空隙中の水分状態が体積変化に与える影響を,温度履歴の観点から捉えることを目的とした。一定の高温乾燥後,封緘状態を与えた場合,収縮の顕著な回復が観察された。これは高温履歴のみに見られる挙動であり,封緘下での内在水分の再分配により,相対湿度の上昇が生じたと推察した。さらに常温・高温乾燥実験の比較検討を行い,細孔内水分の温度依存性がもたらす力学的特性について考察を行った。以上の検討を通じて,任意の温度環境における水分状態と体積変化機構の連関を強化したコンクリートの複合構成則の提案を行った。
Japanese
ISSN：1347-7560, J-Global ID：200902282612887630, CiNii Articles ID：110009695574, CiNii Books ID：AA12600419 - MICROSCOPIC APPROACH TO TIME-DEPENDENT DEFORMATION MECHANISM OF CONCRETE BASED ON LIQUID CHARACTERISTICS
ASAMOTO Shingo; ISHIDA Tetsuya
Number：760, First page：159, Last page：172, 2004, [Reviewed], [Lead]
Japanese
DOI：https://doi.org/10.2208/jscej.2004.760_159
DOI ID：10.2208/jscej.2004.760_159, ISSN：0289-7806, CiNii Articles ID：10012364562, CiNii Books ID：AN10014020 - コンクリートのクリープ・収縮に与える微細空隙中の液体特性及び分布の影響
浅本晋吾; 石田哲也
Volume：Vol.25, Number：No.1, First page：509, Last page：514, 2003, [Reviewed], [Lead]
本研究では,コンクリートの内部にある液体の特性及び分布がクリープ・収縮に与える影響について検討を行った。セメントペースト硬化後に絶乾を施し,各種液体に浸漬させ,収縮ひずみ・飽和度の経時変化の検討及びクリープ実験を行った。その結果,水を浸漬したときのみ飽和度・絶乾による収縮が大きく回復し,クリープ挙動も発生した。水以外の液体は微細空隙に浸漬しないことから,nmレベルのゲル・層間空隙,結晶といった微視的空隙にある水の特異な特性がクリープ・収縮に大きく影響していることが解った。
Japanese
ISSN：1347-7560, J-Global ID：200902222835338481, CiNii Articles ID：110009694291, CiNii Books ID：AA12600419 - ECCの疲労解析モデルの構築
松本高志; S. Peerapong; 浅本晋吾
Volume：vol.24, Number：No.1, First page：237, Last page：242, 2002, [Reviewed]
歪み硬化型高靭性セメント複合材料(ECC)の疲労解析モデルを構築した。ECCの複数ひび割れによる損傷領域の広がりとひび割れ局所化・進展を考慮している。ひび割れにおける伝達応力の疲労劣化が繊維疲労破断に起因するとし,伝達応力劣化関数の形で含めることにより疲労解析を行っている。ECCの曲げ疲労実験によるS-N曲線を解析モデルによる計算値と比較することにより妥当性を検証した。
Japanese
ISSN：1347-7560, J-Global ID：200902168141674293, CiNii Articles ID：110009693683, CiNii Books ID：AA12600419
- コンクリートとAI/2.設計分野 機械学習によるコンクリートの乾燥収縮の回帰分析と定式化
岡崎百合子; 岡崎慎一郎; 浅本晋吾; 今本啓一
Volume：62, Number：9, 2024
ISSN：0387-1061, J-Global ID：202402263879197091 - Development of teaching materials and educational methods for AI and data science (Report of Results: WG-I, IV)
NISHIO Mayuko; DANG Ji; MIYOSHI Takao; ASAMOTO Shingo; NAGAYAMA Tomonori; SHIRAHATA Hiromi; KURUMATANI Mao; OBAMA Kengo; KANDA Shinya; SHIMOSHO Takahiro; SUGISAKI Koichi; TADA Keiichi; MIZUTANI Daijiro; CHUN Pang-jo; ABE Masato
Artificial Intelligence and Data Science, Volume：4, Number：L3, First page：1, Last page：7, 2023
This paper summarizes the research activities of WG-I, IV from FY 2019 to FY 2021. The purpose of the activities of these WGs was to examine AI teaching materials and educational methods. In this paper, we briefly introduce the cases studied by each member of these WGs.
Japan Society of Civil Engineers, Japanese
DOI：https://doi.org/10.11532/jsceiii.4.l3_1
DOI ID：10.11532/jsceiii.4.l3_1, eISSN：2435-9262 - 日本インフラの「強み」と「オリジナリティ」はどこに?-求められる将来に向けた『進化』-第11回 No.10 マスコンクリートのひび割れ制御技術-大型構造物の新規建設の少ない今,目指す展開は?-
浅本晋吾
Volume：105, Number：9, 2020
ISSN：0021-468X, J-Global ID：202002261963754471 - Influence of High Temperature on Concrete Performance
浅本晋吾; 岡崎慎一郎; 蔵重勲; 千々和伸浩; 川端雄一郎
コンクリート工学, Volume：57, Number：6, First page：426, Last page：432, Jun. 2019, [Reviewed]
ISSN：0387-1061, J-Global ID：201902291702079683 - 熱力学的相平衡計算に基づく系内に存在する炭酸カルシウムがettringiteの安定性に及ぼす影響
浅本晋吾; 宮本慎太郎
Volume：JCI-C98, 2019
J-Global ID：202002222255679300 - 「DEFのリスクを考える」に関するシンポジウム 委員会報告書
川端雄一郎; 羽原俊祐; 小川彰一; 兵頭彦次; 吉田夏樹; 浅本晋吾; 東洋輔; 五十嵐豪; 上原元樹; 臼井達哉; 蔵重勲; 斎藤豪; 玉滝浩司; 寺本篤史; 取違剛; 松下哲郎; 野村博史; 宮本慎太郎; 村岡史朗; 森泰一郎; 西岡由紀子
Volume：JCI-C98, 2019
J-Global ID：202002219324875042 - Hydration and heat development
Laurie Lacarrière; Agnieszka Knoppik; Wilson Ricardo Leal da Silva; Tulio Honorio; Vit Šmilauer; Shingo Asamoto; Eduardo M.R. Fairbairn
RILEM State-of-the-Art Reports, Volume：27, First page：13, Last page：46, 2019
DOI：https://doi.org/10.1007/978-3-319-76617-1_2
Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85047660969&origin=inward
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85047660969&origin=inward
DOI ID：10.1007/978-3-319-76617-1_2, ISSN：2213-204X, eISSN：2213-2031, SCOPUS ID：85047660969 - Cracking risk and regulations
Agnieszka Knoppik; Jean Michel Torrenti; Shingo Asamoto; Eduardus Koenders; Dirk Schlicke; Luis Ebensperger
RILEM State-of-the-Art Reports, Volume：27, First page：257, Last page：306, 2019
DOI：https://doi.org/10.1007/978-3-319-76617-1_8
Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85047664807&origin=inward
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85047664807&origin=inward
DOI ID：10.1007/978-3-319-76617-1_8, ISSN：2213-204X, eISSN：2213-2031, SCOPUS ID：85047664807 - コンクリートの性能に及ぼす高温作用の影響評価研究小委員会(352委員会)成果報告書
佐藤良一; 坂井悦郎; 浅本晋吾; 蔵重勲; 岡崎慎一郎; 川端雄一郎; 千々和伸浩; 伊藤隼人; 上田尚史; 上原元樹; 臼井達哉; 大野拓也; 小川由布子; 木ノ村幸士; 久我龍一郎; 車谷麻緒; 斎藤豪; 坂本亮; 佐々木謙二; 佐藤正己; 高橋恵輔; 高橋佑弥; 玉滝浩司; 取違剛; 芳賀和子; 人見尚; 藤井隆史; 矢ノ倉ひろみ; 山田雅宏; 米田大樹; 関健吾
コンクリート技術シリーズ, Number：120, First page：140P, 16 Oct. 2018
Japanese
J-Global ID：201902286436417676 - Template for paper submission to the Eleventh U.S. National Conference on Earthquake Engineering
J. Dang; A. Shrestha; X. Wang; S. Matsunaga; P. J. Chun; S. Asamoto
11th National Conference on Earthquake Engineering 2018, NCEE 2018: Integrating Science, Engineering, and Policy, Volume：10, First page：6165, Last page：6175, 2018
Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85085625400&origin=inward
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85085625400&origin=inward
SCOPUS ID：85085625400 - LOW COST BRIDGE SEISMIC MONITORING APPLYING USED SMART PHONES AND CLOUD SERVER
Ji Dang; Ashish Shrestha; Xin Wang; Shogo Matsunaga; Pang-jo Chun; Shingo Asamoto
Proceedings of Eleventh U.S. National Conference on Earthquake Engineering, First page：1124, 2018
English - 地域アセットマネジメントにおける簡易点検手法の適用に関する一考察
大窪 和明; 全 邦釘; 浅本 晋吾; 岡崎 慎一郎
First page：117, Last page：122, Dec. 2017
Japanese - Mesoscopic analysis of different expansion causes in concrete by 3D Rigid Body Spring Model
EDDY Liyanto; AWASTHI Anupam; 松本浩嗣; 長井宏平; 浅本晋吾
生産研究, Volume：69, Number：4, 2017
ISSN：0037-105X, J-Global ID：201702273465439025 - Bridge Health Monitoring System Based on Smart Devices in Takamatsu Bridge
Ashish Shrestha; Ji Dang; Xin Wang; Shogo Matsunaga; Shingo Asamoto; Okubo Kazuaki; Pang-jo Chun
Proceedings of 2nd JSCE-CICHE Joint Workshop, Volume：2, 2017
English - Characteristics of Bridge Deterioration based on inspection data in Japan
Kazuaki Okubo; Pang-jo Chun; Shingo Asamoto
Proceedings of the Eastern Asia Society of Transportation Studies, Volume：11, 2017
English - セメント系構築物と周辺地盤の化学的相互作用研究小委員会(345委員会)成果報告書
小峯秀雄; 坂井悦郎; 名和豊春; 前川宏一; 石田哲也; 半井健一郎; 乾徹; 蔵重勲; 斎藤豪; 芳賀和子; 細川佳史; 吉田亮; 浅本晋吾; 五十嵐豪; 伊代田岳史; 入江正明; 上田隆雄; 上田洋; 内村太郎; 梅村靖弘; 枝松良展; 大石幹太; 大和田仁; 川本健; 菊地道生; 木ノ村幸士; 清田正人; 黒澤進; 桑野玲子; 小高猛司; 酒井雄也; 佐藤周之; 杉橋直行; 杉山大輔; 須田裕哉; 高橋佑弥; 取違剛; 中村弘典; 二戸信和; 庭瀬一仁
コンクリート技術シリーズ, Number：103, First page：I(1)-I(7),I-V,1-425,427-431, 03 Jul. 2014
Japanese
J-Global ID：201502242272304516 - 若材齢にクリープを促進したPC梁のプレストレス変化と構造性能に関する研究
浅本晋吾; 牧剛史; 加藤恭介; 今野由香里
Volume：22nd, 2013
J-Global ID：201302214554586494 - Detection of corrosion-induced damage in reinforced concrete beams based on structural damping identification
S. Shahzad; H. Yamaguchi; R. Takanami; S. Asamoto
Proceedings of the 13th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC 2013, 2013
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=84905223561&origin=inward
ORCID put code：20393215, SCOPUS ID：84905223561 - Multi-scale modeling to link observed behavior, characterization and analysis
H. Mihashi; K. Maekawa; T. Ishida; S. Asamoto; I. Maruyama
Creep, Shrinkage and Durability Mechanics of Concrete and Concrete Structures - Proceedings of the 8th Int. Conference on Creep, Shrinkage and Durability Mechanics of Concrete and Concrete Structures, Volume：1, First page：117, Last page：143, 2009
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=79952341754&origin=inward
ORCID put code：20393222, SCOPUS ID：79952341754 - Multi-scale constitutive model of solidifying concrete coupled with micro-physical properties of cementitious composites
T. Ishida; K. Maekawa; A. Bongochgetsakul; S. Asamoto
Creep, Shrinkage and Durability Mechanics of Concrete and Concrete Structures - Proceedings of the 8th Int. Conference on Creep, Shrinkage and Durability Mechanics of Concrete and Concrete Structures, Volume：1, First page：145, Last page：151, 2009
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=79952324030&origin=inward
ORCID put code：20393220, SCOPUS ID：79952324030 - Multi-scale analysis of concrete shrinkage coupling with aggregate properties
S. Asamoto; T. Ishida; K. Maekawa
Creep, Shrinkage and Durability Mechanics of Concrete and Concrete Structures - Proceedings of the 8th Int. Conference on Creep, Shrinkage and Durability Mechanics of Concrete and Concrete Structures, Volume：1, First page：161, Last page：167, 2009
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=79952332456&origin=inward
ORCID put code：20393219, SCOPUS ID：79952332456 - Influences of environmental factors on shrinkage behavior of concrete
A. Otsuka; S. Asamoto; C. Miura
Creep, Shrinkage and Durability Mechanics of Concrete and Concrete Structures - Proceedings of the 8th Int. Conference on Creep, Shrinkage and Durability Mechanics of Concrete and Concrete Structures, Volume：2, First page：1419, Last page：1425, 2009
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=79952337955&origin=inward
ORCID put code：20393221, SCOPUS ID：79952337955 - Concept of Concrete Bridge Maintenance and its Application
MUTSUYOSHI H.; ASAMOTO S.; TAKASE H.
コンクリート工学, Volume：46, Number：3, First page：10, Last page：16, 01 Mar. 2008
Japanese
ISSN：0387-1061, J-Global ID：200902254193557981, CiNii Articles ID：10020242486, CiNii Books ID：AN00094169 - Multi-scale time-dependent deformation model of solidifying cementitious materials coupling with aggregate properties
S. Asamoto; T. Ishida; K. Maekawa
First page：225, Last page：232, 2008 - Hybrid FRP composite I-beams consisting of CF/GFRP
H. Mutsuyoshi; N. D. Hai; S. Asamoto; A. C. Manalo; T. Matsui
Proceedings of the 4th International Conference on FRP Composites in Civil Engineering, CICE 2008, 2008, [Reviewed]
Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=79952209100&origin=inward
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=79952209100&origin=inward
SCOPUS ID：79952209100 - Mechanical behavior of hybrid FRP composites with bolted joints
A. C. Manalo; H. Mutsuyoshi; S. Asamoto; T. Aravinthan; T. Matsui
Futures in Mechanics of Structures and Materials - Proceedings of the 20th Australasian Conference on the Mechanics of Structures and Materials, ACMSM20, First page：47, Last page：53, 2008, [Reviewed]
Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=79952224570&origin=inward
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=79952224570&origin=inward
ORCID put code：20393224, SCOPUS ID：79952224570 - Experimental investigation of innovative hybrid composite girders with GFRP and CFRP
S. Asamoto; H. Mutsuyoshi; T. Aravinthan; K. Suzukawa
Proceedings of the 4th International Structural Engineering and Construction Conference, ISEC-4 - Innovations in Structural Engineering and Construction, Volume：1, First page：669, Last page：675, 2008, [Reviewed]
English
Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=55549147546&origin=inward
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=55549147546&origin=inward
ORCID put code：20393225, SCOPUS ID：55549147546, Web of Science ID：WOS:000253973500102 - Composite behavior of hybrid CFRP-GFRP bridge girders
H. Mutsuyoshi; N. D. Hai; S. Asamoto; H. Minn; T. Matsui
Futures in Mechanics of Structures and Materials - Proceedings of the 20th Australasian Conference on the Mechanics of Structures and Materials, ACMSM20, First page：61, Last page：67, 2008, [Reviewed]
Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=79952213274&origin=inward
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=79952213274&origin=inward
ORCID put code：20393223, SCOPUS ID：79952213274 - Flexural behavior of hybrid FRP girder with concrete deck
H. Mutsuyoshi; T. Aravinthan; S. Asamoto; A. C. Manalo; K. Suzukawa
Proceedings of the 1st Asia-Pacific Conference on FRP in Structures, APFIS 2007, Volume：2, First page：1107, Last page：1112, 2007
Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85083566815&origin=inward
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85083566815&origin=inward
SCOPUS ID：85083566815 - Multi-scale Constitutive Model of Solidifying Cementitious Composites and Application to Cracking Assessment of a Concrete Structure
Ishida, T; Asamoto, S; Maekawa, K
First page：85, Last page：99, 2006 - Effect of aggregate stiffness and porosity on shrinkage of concrete
Yasuaki Furuya; Shingo Asamoto; Tetsuya Ishida
Materials, Experimentation, Maintenance and Rehabilitation - Proceedings of the 10th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC 2010, First page：737, Last page：742, 2006
Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=84886704338&origin=inward
ORCID put code：20393228, SCOPUS ID：84886704338 - Influence of Thermo-Hygro Profile and Micro-Pore Characteristic on Time-Dependent Mechanical Behavior of Concrete
Shingo ASAMOTO; Tetsuya ISHIDA
Proceedings of the 9th East Asia-Pacific Conference on Structural Engineering and Construction (EASEC9), Volume：CMD, First page：8, Last page：13, 2003 - Influence of liquid characteristic and its distribution in micro-pore on time-dependent mechanical behavior of concrete
Shingo ASAMOTO; Tetsuya ISHIDA
Engineering Conference on Advances in Cement and Concrete, First page：181, Last page：190, 2003
- 日本インフラの「技」 : 原点と未来
中居, 楓子; 浅本, 晋吾; 家田, 仁; 土木学会; 土木学会土木学会誌編集委員会
Dec. 2022
Japanese, Total pages：288p
CiNii Books：http://ci.nii.ac.jp/ncid/BD00514739
ISBN：9784810610550, CiNii Books ID：BD00514739
■ Research projects
- 高炉セメントコンクリートのひび割れ要件解明と水和物形態に基づく収縮抑制手法の開発
01 Apr. 2023 - 31 Mar. 2026
Grant amount(Total)：18460000, Direct funding：14200000, Indirect funding：4260000
Grant number：23K26173 - Study on CO2 capture technology utilizing construction wastes and the corresponding composites of organic and inorganic materials
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), 01 Apr. 2023 - 31 Mar. 2026
Kagawa University
Grant amount(Total)：4680000, Direct funding：3600000, Indirect funding：1080000
Grant number：23K03987 - 高炉セメントコンクリートのひび割れ要件解明と水和物形態に基づく収縮抑制手法の開発
01 Apr. 2023 - 31 Mar. 2026
Grant amount(Total)：18460000, Direct funding：14200000, Indirect funding：4260000
Grant number：23H01479 - 塩化物を高含有したコンクリートの腐食抑制効果と物性評価
30 Jun. 2023 - 31 Mar. 2025
Grant amount(Total)：6240000, Direct funding：4800000, Indirect funding：1440000
Grant number：23K17768 - 深層学習を実装した微細構造解析による鉄筋コンクリート内部損傷の逆推定と性能評価
01 Apr. 2022 - 31 Mar. 2025
Grant amount(Total)：42640000, Direct funding：32800000, Indirect funding：9840000
Grant number：22H00224 - A New AI Method for Bridge Inspection and Diagnosis that Combines CNN with Highly Accurate Damage Detection and Expertises
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), 01 Apr. 2021 - 31 Mar. 2024
The University of Tokyo
Grant amount(Total)：17420000, Direct funding：13400000, Indirect funding：4020000
Grant number：21H01417 - 材料及び環境条件に基づくDEF膨張の発生・抑制機構の解明と構造性能への影響評価
01 Apr. 2020 - 31 Mar. 2023
Grant amount(Total)：17680000, Direct funding：13600000, Indirect funding：4080000
Grant number：20H02219 - Multiscale Modeling of Cementitious Materials and Structures based on Properties of Calcium Silicate Hydrates
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A), Grant-in-Aid for Scientific Research (A), 01 Apr. 2017 - 31 Mar. 2020
Ishida Tetsuya, The University of Tokyo
Grant amount(Total)：44200000, Direct funding：34000000, Indirect funding：10200000
The objective of this study was to construct a multiscale thermodynamic model and a time-dependent constitutive law that take into account the properties of calcium silicate hydrates, whose characters are different depending on the type of binder, and to develop a numerical analysis scheme to directly evaluate both the microscopic properties of cementitious materials and the macroscopic behavior of structures. A model describing the hydration reaction of fly ash with various physico-chemical compositions was developed in a unified framework, and a generalized model including both artificial pozzolans and natural pozzolans was successfully constructed. In addition, we focused on the connectivity of pore structures and attempted to elucidate the mechanism of water and ion transport in microstructures, and found that the threshold value of water content that ensures pore connectivity can be uniquely determined regardless of the porosity.
Grant number：17H01284 - Study on interface variation between different materials in concrete depending on temperature history during hardening and its association with durability
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B), Grant-in-Aid for Scientific Research (B), 01 Apr. 2017 - 31 Mar. 2020
Asamoto Shingo, Saitama University
Grant amount(Total)：16770000, Direct funding：12900000, Indirect funding：3870000
This study investigated the damage around constitutive materials of concrete and the subsequent change of material properties when the high temperature over 70 C is exposed to concrete at early ages. It is suggested that the high temperature can cause the micro damages at the interfacial zones depending on the materials and the resistivity of concrete to mass transfer of harmful materials may be decreased due to the damage. It is also found that the volumetric change and deformation characteristics can increase according to the materials and initial temperature history. The experimental and numerical analysis indicated that the swelling arising from the high temperature at early ages can be accelerated by carbonate ion. The long-term inhibition of the swelling by the coal ash was also experimentally confirmed.
Grant number：17H03285 - Heat transfer phenomena and its suitable boundary conditions of geomaterials under cooling and heating process
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A), Grant-in-Aid for Scientific Research (A), 01 Apr. 2014 - 31 Mar. 2019
Yamabe Tadashi, Saitama University
Grant amount(Total)：30680000, Direct funding：23600000, Indirect funding：7080000
To investigate the heat transfer characteristics of sand stone due to cooling and heating process, cylinder of 50mm diameter and sphere of 50mm and 100mm diameter were used as the samples. Two types of boundary conditions had been used for the derivation of exact solutions of the governing equations. They were Dirichlet boundary (DB) and heat transfer boundary (HTB) conditions. Hence, comparison had been made on these two boundary conditions to identify their suitability on heat transfer characteristics. The results show that the exact solutions derived using HTB has been fitted better than DB for both cooling and heating phenomenon in cylinders as well as in spheres.
Grant number：26249068 - Maintenance and Long Life Sustainabilty of Prestressed Concrete Bridges
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B), Grant-in-Aid for Scientific Research (B), 01 Apr. 2015 - 31 Mar. 2018
MUTSUYOSHI Hiroshi; SANADA Osamu; AOKI Keiichi, Saitama University
Grant amount(Total)：17810000, Direct funding：13700000, Indirect funding：4110000
In order to clarify the flexural behavior of prestressed concrete (PC) beams having damaged tendons. The tendons of the PC beams were intentionally broken by a core drilling machine or accelerated corrosion process. The loading tests were carried out to investigate the influence of location and degree of damage of the tendons on the load carrying capacity of the PC beams. A nonlinear pushover analysis was also performed using fiber model and the analytical results were verified by the experimental results. From the analysis it was found that the load carrying capacity of the PC beams having damaged tendons can be estimated with good accuracy. Furthermore, the fiber model was applied for actual PC box bridges assuming the degree of corrosion damage of the PC tendons and the location of the corrosion. The analytical results were used to estimate the safety of the PC box bridges when the tendons are heavily corroded.
Grant number：15H04029 - Long-term behavior of joint connection in steel-concrete hybrid structural system
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B), Grant-in-Aid for Scientific Research (B), 01 Apr. 2015 - 31 Mar. 2018
Maki Takeshi, Saitama University
Grant amount(Total)：18460000, Direct funding：14200000, Indirect funding：4260000
The long-term external load acting on steel-concrete joint connection in steel-concrete hybrid structural system may induce additional deformation in shear connectors and their surrounding concrete. The long-term slip increment in shear connecting system leading to the deformation of joint connection is experimentally and numerically clarified in this research. The push-out test specimens with headed stud shear connectors were loaded with sustained external shear force for a month, and the long-term slip was numerically simulated by nonlinear finite element analysis. Furthermore, the long-term sustained loading test of joint connection between composite girder and prestressed concrete girder was also conducted so that the long-term deflection increment under various load level was quantified.
Grant number：15H04030 - Study on characteristics change and its mechanism of cementitious materials exposed to 60-80 degrees C
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B), Grant-in-Aid for Scientific Research (B), 01 Apr. 2013 - 31 Mar. 2016
ASAMOTO Shingo; KURAHIGE Isao; NAWA Toyoharu, Saitama University
Grant amount(Total)：17420000, Direct funding：13400000, Indirect funding：4020000
In this study, mechanical properties such as compressive strength and chemical degradation of cementitious materials exposed to 60-80 °C was examined. As a result, history of 80 °C during the curing can retard the strength development comparing to 20 °C curing case based on the pore structure change. It was also found that the cement with limestone powder is more probable to cause a map cracking on the surface of cementitious materials when they are exposed to high temperature at early ages. It is suggested that the replacement of cement with fly ash can be effective to inhibit the chemical degradation and to avoid the large strength reduction depending on the aggregate type.
Grant number：25289130 - Long-Term Dynamic Simulation of Large-Scale RC-PC Infrastructures Based on Quasi Thermo-hygral Modeling
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (S), Grant-in-Aid for Scientific Research (S), 01 Apr. 2011 - 31 Mar. 2016
MAEKAWA KOICHI; ISHIDA Tetsuya; ISHIHARA Takeshi; MISHIMA Tetsuya; ISHIBASHI Tadayoshi; TANABE Shigeru; SAKATA Noboru, The University of Tokyo
Grant amount(Total)：224640000, Direct funding：172800000, Indirect funding：51840000
By coupling micro-pore networks with nano-channel hydraulics, the hygral-mechanical model on thermodynamic equilibrium of moisture and momentum is upgraded. Rapid adsorption of rain and following evaporation can be accurately reproduced and the model is verified by the continuous monitoring of internal moisture and curvature of the box PC mockups exposed to natural environment. Long-term varying natural frequency of tall buildings and nuclear facilities is successfully simulated by the thermo-hygral model. Delayed shear failure of underground RC culverts was also simulated by the on-site existing facilities, and the remaining risk of failure can be estimated. A unified poro-mechanics with ASR silica & corrosion gels and condensed-ice is established with strong full coupling. Based upon the simulation platform as mention above, the complex deterioration of RC bridge decks under fatigue loads and ASR & freeze/thawing cycles is investigated and the strong coupling is fairly predicted.
Grant number：23226011 - Analysis of deleterious gas leakage risk in injection well and development of high performance oil cement
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research, Grant-in-Aid for Challenging Exploratory Research, 01 Apr. 2013 - 31 Mar. 2015
ASAMOTO Shingo; OSADA Msahiko, Saitama University
Grant amount(Total)：3900000, Direct funding：3000000, Indirect funding：900000
This study focused on the development of the well cement which has a high resistance to harmful gas leakage in Carbon dioxide Captured and Storage (CCS) and Steam Assisted Gravity Drainage (SAGD) projects; CCS is a technology to reduce CO2 emission from power plant and factory by injecting CO2 into a couple of 1000m deep ground and SAGD is a heavy oil recovery technology to reduce heavy oil viscosity by the injection of hot steam and extract it from underground. As a result, it is experimentally found that the addition of fly ash and silica fume in oil well cement can be effective for the inhibition of mechanical deterioration and gas leakage. It is also suggested that the polymer may inhibit the chemical deterioration due to the CO2 in CCS project.
Grant number：25630182 - Mechanism of damage-induced local damping and structural health monitoring of bridges based on damping change
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A), Grant-in-Aid for Scientific Research (A), 01 Apr. 2011 - 31 Mar. 2015
YAMAGUCHI Hiroki; MATSUMOTO Yasunao; OKUI Yoshiaki; ASAMOTO Shingo; MUTSUYOSHI Hiroshi, Saitama University
Grant amount(Total)：42250000, Direct funding：32500000, Indirect funding：9750000
Damages (such as tension crack, corrosion and partial fracture) and damage –induced local damping increment in steel member, concrete member and steel-concrete interface are first experimentally studied to discuss the mechanism of local damping increased by local damages. The evaluation method of structural health condition for steel, RC and PC bridges is then proposed by developing a hybrid method of experimental and analytical modal syntheses based on ambient vibration measurement and global damping change monitoring. The method of ambient vibration measurement is carefully studied for optimizing it as a system and the identification of global damping change in bridges is refined with FE model updating method. How to implement the proposed method of bridge health evaluation to the Bridge Management System was finally discussed.
Grant number：23246082 - Reduction of Chloride Ion in RC Structures by Inverse Diffusion Method
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research, Grant-in-Aid for Challenging Exploratory Research, 01 Apr. 2012 - 31 Mar. 2014
MUTSUYOSHI Hiroshi; ASAMOTO Shingo, Saitama University
Grant amount(Total)：3640000, Direct funding：2800000, Indirect funding：840000
Chloride ingress in Reinforced Concrete (RC) structures is the most aggressive phenomenon that causes the corrosion of steel reinforcement bars and warrants untimely expensive repair of the existing structures. To ensure the durability of RC structures, the development of high performing repairing material is immensely expected. This study was carried out using ion-exchange resin admixture to develop a high durable resin mixed cement mortar for reducing the chloride induced corrosion of RC structures. A set of experiments including immersion tests, inverse diffusion tests were conducted to investigate the chloride absorption behavior and corrosion reducing potentiality of resin mixed cement mortar. The test results revealed that, newly developed mortar could effectively reduce chloride concentration at the reinforcement area and restrain the chloride induced corrosion of RC structures.
Grant number：24656266 - Development of Rational Design Method of RC and Steel-Concrete Hybrid Structures considering Local Creep Deformation between Concrete and Steel
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C), Grant-in-Aid for Scientific Research (C), 2011 - 2013
MAKI Takeshi; ASAMOTO Shingo, Saitama University
Grant amount(Total)：5330000, Direct funding：4100000, Indirect funding：1230000
In the investigation on the shrinkage cracks of concrete, the tensile stress and tensile creep strain measured in concrete specimens with and without deformed bar showed different tendencies and the influence of time-dependency in bond behavior between concrete and deformed bar was clarified. By conducting the finite element analysis of underground RC structure-soil system, the active soil pressure reduction due to creep deformation of side wall and the possibility of reduction of wall thickness and reinforcement amount were clarified, which may lead to the rational design of underground RC structures. Furthermore, the influence of sustained shear and compression forces on the deformation of joint connection with stud shear connector in steel-concrete hybrid structures was quantitatively clarified.
Grant number：23560563 - Development of risk management system for long-term stability of cementitious materials in important structures at deep underground
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (A), Grant-in-Aid for Young Scientists (A), 2011 - 2012
ASAMOTO Shingo; KURASHIGE Isao; OKAZAKI Shinichiro; BRUNO Capra; OLIVIER POUPARD; YVI LE GUEN, Saitama University
Grant amount(Total)：28080000, Direct funding：21600000, Indirect funding：6480000
In this study, the risk of CO_2 leakage through the well for Carbon Captured and Storage and the long-term performance of artificial cement barrier in the facility of nuclear waste disposal are numerically and experimentally analyzed. The leakage risk is examined focusing on the cracking of cement paste in the well due to CO_2 injection pressure and the chemical deterioration of the cement paste exposed to high temperature, high pressure and high concentration of CO_2 at deep underground. The calcium leaching to increase the risk of radioactive nuclide leakage is investigated using previous numerical models to deliberate dominant parameters for the leaching.
Grant number：23686063 - Technological development for reducing shrinkage cracking in cold climates
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B), Grant-in-Aid for Scientific Research (B), 2010 - 2012
NAWA Toyoharu; KURUMISAWA Kiyofumi; ASAMOTO Singo, Hokkaido University
Grant amount(Total)：17030000, Direct funding：13100000, Indirect funding：3930000
For technological development of shrinkage cracking suppression in cold climates, we have elucidated the frost damage degradation mechanisms and drying shrinkage reduction of shrinkage reducing agent, and developed a new shrinkage reducing agent (SRA) with improved freeze-thaw resistance. In addition, our shrinkage reducing agents had been optimized the molecular structure of shrinkage reducing agent according to an integrated model for the freezing and thawing action deterioration and drying shrinkage. In laboratory we examined the properties of fresh and hardened concrete such as workability, setting, mechanical properties, drying shrinkage, carbonation, rebar corrosion and the freeze-thaw resistance, and confirmed that the properties of SRA concrete were equivalent to those of concrete without SRA. Finally, we had also manufactured SRA concrete at ready-mixed concrete plant and fabricated in the actual structures, and confirmed that the performance of SRA concretes satisfied the target requirements.
Grant number：22360220 - 塩化物イオン吸着材を繊維に取り組んだ高耐久繊維補強コンクリートの開発
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research, Grant-in-Aid for Challenging Exploratory Research, 2009 - 2010
Saitama University
Grant amount(Total)：3100000, Direct funding：3100000
Grant number：21656110 - Development of shrinkage cracking assessment system of concrete containing mineral admixture
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B), Grant-in-Aid for Young Scientists (B), 2009 - 2010
ASAMOTO Shingo, Saitama University
Grant amount(Total)：4420000, Direct funding：3400000, Indirect funding：1020000
The comprehensive experimental study for the assessment of the shrinkage cracking of concrete with industrial waste such as blast furnace slag and fly ash is carried out. The experimental results suggest that the shrinkage cracking resistance after curing at elevated temperature is likely to be decreased due to reductions of tensile creep and tensile strength when the mineral admixture is replaced with cement, while the dense pore structure arising from the promoted chemical reaction under high temperature can mitigate the shrinkage. It is significant to take into account the effect of temperature history of concrete with mineral admixture to predict the shrinkage cracking.
Grant number：21760342 - Shear Cracks of Prestressed Reinforced Concrete Members
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B), Grant-in-Aid for Scientific Research (B), 2007 - 2008
MUTSUYOSHI Hiroshi; MAKI Takeshi; ASAMOTO Shingo; HA Minh, Saitama University
Grant amount(Total)：11830000, Direct funding：9100000, Indirect funding：2730000
Grant number：19360199 - Development of model to predict deterioration of concrete structuresb ased on actual environmental conditions
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B), Grant-in-Aid for Young Scientists (B), 2007 - 2008
ASAMOTO Shingo, Saitama University
Grant amount(Total)：3660000, Direct funding：3300000, Indirect funding：360000
Grant number：19760301 - 微視的機構に立脚したコンクリート材料の時間依存構成モデルの構築
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for JSPS Fellows, Grant-in-Aid for JSPS Fellows, 2003 - 2005
The University of Tokyo
Grant amount(Total)：2400000, Direct funding：2400000
Grant number：03J52271 - コンクリート工学
Competitive research funding - Concrete Engineering
Competitive research funding