{"title":"Discrete Element Modelling of Powder-compacted C-S-H Matrix","authors":"Zhe Zhang, Guoqing Geng","doi":"10.3151/jact.21.889","DOIUrl":null,"url":null,"abstract":"</p><p>The usage of supplementary cementitious materials often alters the chemical composition of the main binding phase in modern concrete, i.e., C-S-H. The consequent influence on the mechanical properties is not completely clear, due to the lack of study on the inter-particle interaction of C-S-H. Recent papers published by the authors have provided experimental evidence, and in this work, a subsequent numerical study based on discrete element method (DEM) is provided. Models of compacted C-S-H were established with various surface interaction parameters between particles, e.g., surface energy and friction coefficient, and subjected to simulated triaxial load. The results revealed that increased surface energy and friction coefficient enhance the stiffness of C-S-H and densifies its microstructure. The work may inspire methods to design stronger cementitious composite materials.</p>\n<p></p>","PeriodicalId":14868,"journal":{"name":"Journal of Advanced Concrete Technology","volume":"5 1","pages":""},"PeriodicalIF":1.6000,"publicationDate":"2023-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Advanced Concrete Technology","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.3151/jact.21.889","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
The usage of supplementary cementitious materials often alters the chemical composition of the main binding phase in modern concrete, i.e., C-S-H. The consequent influence on the mechanical properties is not completely clear, due to the lack of study on the inter-particle interaction of C-S-H. Recent papers published by the authors have provided experimental evidence, and in this work, a subsequent numerical study based on discrete element method (DEM) is provided. Models of compacted C-S-H were established with various surface interaction parameters between particles, e.g., surface energy and friction coefficient, and subjected to simulated triaxial load. The results revealed that increased surface energy and friction coefficient enhance the stiffness of C-S-H and densifies its microstructure. The work may inspire methods to design stronger cementitious composite materials.
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Scope:
*Materials:
-Material properties
-Fresh concrete
-Hardened concrete
-High performance concrete
-Development of new materials
-Fiber reinforcement
*Maintenance and Rehabilitation:
-Durability and repair
-Strengthening/Rehabilitation
-LCC for concrete structures
-Environmant conscious materials
*Structures:
-Design and construction of RC and PC Structures
-Seismic design
-Safety against environmental disasters
-Failure mechanism and non-linear analysis/modeling
-Composite and mixed structures
*Other:
-Monitoring
-Aesthetics of concrete structures
-Other concrete related topics