EFFECT OF LIGHTWEIGHT AGGREGATE ON THE PERFORMANCE OF HIGH PERFORMANCE CONCRETE CONTAINING EXPANSION AGENT

摘要：

Expansion agent was used to reduce the shrinkage of high performance concrete(HPC) for a few years. However,due to the absence of water in HPC,expansion agent couldhardly perform its function. Although some researchers used the pre-wetted lightweightaggregate (LWA) to reduce the shrinkage of high performance concrete,there is still no reportabout using the LWA to improve the performance of expansion agent in HPC,Studyintroduced in this paper aimed to reveal the influence of LWA on the performance of HPCcontaining expansion agent. Results of experiments show that,when replacing ordinaryaggregate with LWA,the strength and elastic modulus of HPC decrease,otherwise addingsilica fume can restore the strength,but not the elastic modulus. At the same time,HPCcontaining LWA expand during the age of 180 d,and HPC without LWA shrink. Creep ofHPC with LWA is analogous to the ordinary concrete.

关键词： high performance concrete lightweight aggregate expansion agent

作者: ZOU Dinghua DING Qingjun MA Baoguo HU Shuguang

作者单位: Key laboratory for silicate materials science and engineering of Ministry of Education,Wuhan University of technology,Wuhan 430070,PR China

会议类型: 国际会议

会议名称: The International Conference on Durability of Concrete Structures(2008年混凝土结构耐久性国际学术会议)

会议地点: 杭州

会议语种:英文

页码: 388-393

在线出版日期: 2008-11-01（万方平台首次上网日期，不代表论文的发表时间）