影响自密实混凝土抗渗性能因素研究  

Study on the Impermeability of Serf-compacting Concrete Under Different Influence Factors

作　　者：杜艳廷[1] 董进秋[1] 闻宝联[1] 孟庆营[1] 

机构地区：[1]天津市市政工程研究院,天津300074

出　　处：《中国包装科技博览（混凝土技术）》2011年第1期66-69,共4页China Science and Technology Review

摘　　要：本文以混凝土的收缩变形为辅助指标，通过试验研究了水胶比、膨胀剂掺量和引气剂等三个因素对自密实混凝土抗渗性能的影响。结果表明：自密实混凝土的收缩变形与其抗渗性能存在一定的关系；水胶比在0．35～0．36之间，膨胀剂在30～40kg／m3之间时，自密实混凝土的收缩变形小，抗渗性能最佳，并且在自密实混凝土中应用引气剂能够有效抑制其收缩变形，提高抗渗性能。The impermeability of self-compacting concrete with different water-binder ratios, dosage of UEA and air-entraining admixture were studied with the aid of concrete shrinkage strain as auxiliary characteristics. The results show that the impermeability of SCC was related to its shrinkage strain. When the water-binder ratios were 0.35-0.36 and the dosage of UEA were 30-40 kg/m3, concrete specimens have little shrinkage strain and show excellent impermeability, and in addition, a small quantity of air-entraining admixture can effectively restrain the shrinkage and improve the impermeability.

关 键 词：自密实混凝土 抗渗性能 收缩 辅助指标 

分 类 号：TU528.31[建筑科学—建筑技术科学]