INFLUENCE OF PRE-SOAKED LIGHTWEIGHT AGGREGATE ON THE SHRINKAGE OF SELF-COMPACTING CONCRETE
Influence of substituting volume fraction of two different pre-soaked lightweight aggregates (LWA A and LWA B) on the fresh properties, compressive strength, early-age autogenous shrinkage, and drying shrinkage of self-compacting concrete (SCC) was investigated.The results indicate that the autogenous shrinkage of mortars in SCC within 3 days significantly decreased with the increasing of internal curing (IC) water.When the internal water in SCC was identical, the LWA A improves the autogenous shrinkage more significantly than LWA B during the first 3 days.Autogenous swelling of mortars in SCC was noticed during the first day, which was mainly caused by reabsorption of bleeding water.The compressive strength of SCC decreased with the increase of substituting volume fraction of pre-soaked LWAs.No significant influence of LWAs on drying shrinkage of SCC was found in this study.
Self-compacting concrete Lightweight aggregate Autogenous shrinkage Drying shrinkage Internal curing
Kuixi Lv Caijun Shi Shu Wan Jiake Zhang
College of Civil Engineering, Hunan University, Changsha 410082, PR China
国际会议
厦门
英文
276-287
2014-06-05（万方平台首次上网日期，不代表论文的发表时间）