EARLY-AGE SHRINKAGE AND CRACKING OF SELF-COMPACTING CONCRETE: MEASUREMENT TECHNIQUES AND MITIGATION STRATEGIES

摘要：

Self-Compacting Concrete (SCC) has superior flowability and self-compactability, and doesnt need vibration compared with traditional ordinary concrete. However, SCC has generally higher shrinkage and crack attendance, especially at early ages. This paper discusses the early-age shrinkage and cracking behaviour of SCC, particularly the early-age autogenous strain, settlement shrinkage and plastic shrinkage cracking. New measurement techniques are introduced to evaluate the early-age shrinkage and cracking properties. Several mitigation strategies, including shrinkage compensating technique, shrinkage reducing agent, super absorbent polymer, and a new type of water evaporation reducing agent are discussed for restraining both autogenous strain and plastic shrinkage cracking.

作者: Changwen Miao Qian Tian Jiaping Liu

作者单位: Jiangsu Academy of Building Science Co., Ltd,Nanjing,China Jiangsu Academy of Building Science Co., Ltd, Nanjing, China

会议类型: 国际会议

会议名称: 第二届自密实混凝土设计、性能及应用技术国际研讨会(2nd International Symposium on Design,Performance and Use of Self-Consolidating Concrete SCC2009-China)

会议地点: 长沙

会议语种:英文

页码: 74-84

在线出版日期: 2009-06-05（万方平台首次上网日期，不代表论文的发表时间）