Shrinkage behavior of self-compacting concrete  

作　　者：Farhad ASLANI Shami NEJADI 

机构地区：[1]Centre for Built Infrastructure Research, School of Civil and Environmental Engineering, University of Technology Sydney, Australia

出　　处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2012年第6期407-419,共13页浙江大学学报（英文版）A辑（应用物理与工程）

摘　　要：In the structures where long-term behavior should be monitored and controlled, creep and shrinkage effects have to be included precisely in the analysis and design procedures. Shrinkage varies with the constituent and mixture proportions, and depends on the curing conditions and the work environment as well. Self-compacting concrete (SCC) contains combinations of various components, such as aggregate, cement, superplasticizer, water-reducing agent and other ingredients which affect the properties of the SCC including shrinkage. Hence, the realistic prediction shrinkage strains of SCC are an important requirement of the design process for this type of concrete structures. This study reviews the accuracy of the conventional concrete (CC) shrinkage prediction models proposed by the international codes of practice, including CEB-FIP (1990), ACI 209R (1997), Eurocode 2 (2001), JSCE (2002), AASHTO (2004; 2007) and AS 3600 (2009). Also, SCC shrinkage prediction models proposed by Poppe and De Schutter (2005), Larson (2007), Cordoba (2007) and Khayat and Long (2010) are reviewed. Further, a new shrinkage prediction model based on the comprehensive analysis on both of the available models, i.e., the CC and the SCC is proposed. The predicted shrinkage strains are compared with the actual measured shrinkage strains in 165 mixtures of SCC and 21 mixtures of CC.In the structures where long-term behavior should be monitored and controlled, creep and shrinkage effects have to be included precisely in the analYSiS and design procedures. Shrinkage varies with the constituent and mixture proportions, and depends on the curing conditions and the work environment as well. Self-compacting concrete （SCC） contains combinations of various components, such as aggregate, cement, superplasticizer, water-reducing agent and other ingredients which affect the properties of the SCC including shrinkage. Hence, the realistic prediction shrinkage strains of SCC are an important requirement of the design process for this type of concrete structures. This study reviews the accuracy of the conventional concrete （CC） shrinkage prediction models proposed by the international codes of practice, including CEB-FIP （1990）, ACI 209R （1997）, Eurocode 2 （2001）, JSCE （2002）, AASHTO （2004; 2007） and AS 3600 （2009）. Also, SCC shrinkage prediction models proposed by Poppe and De Schutter （2005）, Larson （2007）, Cordoba （2007） and Khayat and Long （2010） are reviewed. Further, a new shrinkage prediction model based on the comprehensive analysis on both of the available models, i.e., the CC and the SCC is proposed. The predicted shrinkage strains are compared with the actual measured shrinkage strains in 165 mixtures of SCC and 21 mixtures of CC.

关 键 词：Self-compacting concrete （SCC） Conventional concrete （CC） SHRINKAGE Long-term behavior Concrete structures 

分 类 号：TU528[建筑科学—建筑技术科学]