聚丙烯纤维和膨胀剂对高强轻质混凝土收缩和抗开裂性能的影响  

Effect of Polyethylene Fiber and Expanding Agent on Shrinkage and Cracking Resistance of High-strength Lightweight Concrete

作　　者：朱涵[1,2] 杨建涛[1] 于泳[1] 

机构地区：[1]天津大学建筑工程学院,天津300072 [2]天津大学滨海土木工程结构与安全教育部重点实验室,天津300072

出　　处：《硅酸盐通报》2015年第12期3617-3621,共5页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(51078261)

摘　　要：试验配制了等强的普通混凝土和高强轻质混凝土,为改善高强轻质混凝土的收缩和抗开裂性能,向其中分别单掺、双掺了膨胀剂和聚乙烯纤维。通过自由收缩试验和约束收缩试验研究了聚丙烯纤维和膨胀剂对高强轻质混凝土收缩和抗开裂性能的影响。试验结果表明,聚丙烯纤维和膨胀剂均可以改善高强轻质混凝土的收缩和抗开裂性能;按照本试验的掺量进行双掺,制成的高强轻质混凝土的收缩和抗开裂性能均优于普通混凝土。High-strength lightweight concrete and ordinary concrete of same strength were made in the test. In order to improve the shrinkage and cracking resistance of the high strength lightweight concrete,expanding agent and polyethylene fiber were used,separately or together. Free shrinkage test and constraint shrinkage test were used to study the expanding agent and polyethylene fiber＇s effects on highstrength lightweight concrete. The test results showed that the polypropylene fiber and expansion agent could improve the shrinkage and cracking resistance of high strength lightweight concrete,and the shrinkage and cracking resistance of high strength lightweight concrete with two types mixing were better than the ordinary concrete.

关 键 词：高强轻质混凝土 膨胀剂 聚乙烯纤维 自由收缩 抗开裂 

分 类 号：TU528[建筑科学—建筑技术科学]