超早强混凝土内部孔结构和水化热发展规律的研究

Study on Pore Structure and Hydration Heat of Super Early Strength Concrete

添加了聚羧酸高效减水剂和矿物掺和料的混凝土性能得以很好改善,具有可控的流变性、较好的泵送性和工作性,并且能够在低温负温条件下实现较高的早期强度。针对强度实现过程中混凝土内部孔结构和水化热的发展规律进行了试验研究,结果表明:超早强混凝土的细孔分布峰值偏左、偏高,其细孔结构较致密,因此其强度更高。同时,同强度等级的超早强混凝土与传统混凝土对比,超早强混凝土的水化热峰值更高。

Performance of concrete added with polycarboxylic acid water reducing agent and mineral admixtures were improved,the early strength could be realized at low temperature. The development rules of pore structure and hydration heat of super early strength concrete were studied in this paper. The results showed that The peak of pore size distribution moved to the left,and the pore structure was more compact,so the strength of super early strength concrete was higher. At the same time,the peak of hydration heat for the super early strength concrete was higher.