现代混凝土收缩研究评述
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摘要
混凝土收缩开裂是影响现代混凝土结构耐久性的一项重要因素。科研及工程技术人员时常需面临混凝土收缩所带来的难题。从收缩机理、预测模型、测量方法及收缩调控措施等几方面出发,评述了国内外混凝土收缩研究现状,在此基础上分析总结了已有研究中存在的若干问题,并为今后的研究工作提出了若干建议。
Shrinkage-induced crack is commonly occurred in modern concrete projects,which is difficult to solve and significantly affects the concrete durability.Both scientific researchers and construction technicians frequently confront problems caused by concrete shrinkage-induced cracks in practice.Micro-mechanism,prediction models,measuring and controlling methods of concrete shrinkage were systematically analyzed in present work.Based on the review,some limitations of previous researches and suggestions for future work were discussed.
Shrinkage-induced crack is commonly occurred in modern concrete projects,which is difficult to solve and significantly affects the concrete durability.Both scientific researchers and construction technicians frequently confront problems caused by concrete shrinkage-induced cracks in practice.Micro-mechanism,prediction models,measuring and controlling methods of concrete shrinkage were systematically analyzed in present work.Based on the review,some limitations of previous researches and suggestions for future work were discussed.
引文
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[15]LURA P,JENSEN O M,BREUGEL K.Autogenous shrinkage in high performance cement paste:an evaluation of basic mechanisms[J].Cement and Concrete Research,2003,33(2):223-232.
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[22]POWERS T C.The thermodynamics of volume change and creep[J].Materials and structures,1968,1(6):487-507.
[23]FELDMAN R F,SEREDA P J.A model for hydrated portland cement paste as deduced from sorption-length change and mechanical properties[J].Materials and structures,1968,1(6):509-520.
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[31]VAN BREUGEL K.Numerical modelling of volume changes at early ages-Potential,pitfalls and challenges[J].Materials and Structures,2001,34(5):293-301.
[32]HUA C,ACKER P,EHRLACHER A.Analyses and models of the autogenous shrinkage of hardening cement paste:I.Modelling at macroscopic scale[J].Cement and Concrete Research,1995,25(7):1457-1468.
[33]HUA C,EHRLACHER A,ACLER P.Analyses and models of the autogenous shrinkage of hardening cement paste II.Modelling at scale of hydrating grains[J].Cement and Concrete Research,1997,27(2):245-258.
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