混凝土缓凝剂辅助塑化效应的试验研究  

Expermental Research of Auxiliary Plastic Effect of Concrete Retarder

作　　者：韩越[1] 张新东[1] 

机构地区：[1]塔里木大学,阿拉尔843300

出　　处：《硅酸盐通报》2007年第1期205-211,共7页Bulletin of the Chinese Ceramic Society

基　　金：塔里木大学校内基金资助项目(TDZKQN05001)

摘　　要：混凝土缓凝剂除了具有抑制水泥水化作用,延长混凝土凝结时间以外,还具有辅助塑化效应和辅助增强效应。本文作者采用水泥净浆和混凝土试验方法,详细研究了缓凝剂的上述辅助效应。研究结果表明:通过低分子的缓凝剂与高分子的高效减水剂的协同效应,不但可以有效地抑制混凝土的坍落度损失,而且由于高效减水剂激发了低分子缓凝剂的辅助减水效应和辅助增强效应,在相同减水率的情况下,可有效降低缓凝高效减水剂及泵送剂等复合外加剂的成本,提高混凝土的强度,特别是后期强度。Besides preventing the hydration of cement, so leading to longer setting and hardening time of concrete, concrete retarter still has auxiliary plasticizing effect and auxiliary enhancing strength. In this paper, by adopting the cement paste and concrete experiments, the above auxiliary effects of retarter were investigated in detail. The results indicate that through superplasticizer motivating the auxiliary water-reducing effect and auxiliary enhancing strength effect, the cost of compounded additives such as retarting and high water-reducing agent and pumping agent can be decreased under the same water-reducing ratio,but the strength of concrete can be enhanced, especially the older age strength.

关 键 词：缓凝剂 高效减水剂 辅助塑化效应 辅助减水率 

分 类 号：TU528.2[建筑科学—建筑技术科学]