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水化硅酸钙早强剂的制备及其混凝土性能研究
作者：朱少宏
（科之杰新材料集团有限公司，福建 厦门 361100）
摘要：水化硅酸钙（C-S-H）是水泥水化的最主要产物，也是混凝土最主要的强度来源。采用溶胶-凝胶法合成了水化硅酸钙早强剂，并进行了测试分析。结果表明，在25 ℃时，通过高速搅拌，以及在特定的分散剂溶液作用下，制备的水化硅酸钙早强剂的粒径最小，分散性最好，将其掺入水泥后，可大大降低其成核能垒，促进水泥水化，显著缩短水泥凝结时间，提高其早期强度。
关键词：水化硅酸钙早强剂；溶胶凝胶法；高速搅拌；分散剂；性能研究
中图分类号：TU528.042+.1 文献标识码：A 文章编号：1001-702X（2020）01-0034-04
Preparation of hydrated calcium silicate early strength agent and stuty on the properties of concrete
ZHU Shaohong
（Prominent Science New Materials Group Co. Ltd.，Xiamen 361100，China）
Abstract：Calcium silicate hydrate（C-S-H） is the most important hydration product of cement hydration and the most critical source of strength for concrete. In this paper，hydrated calcium silicate early strength agent was synthesized by sol-gel method，and a series of tests were carried out. The results show that the hydrated calcium silicate early strength agent prepared by high-speed stirring and under the action of specific dispersant solution has the smallest particle size and the best dispersion at 25 ℃. After being blended into cement，it can greatly reduce its nucleation energy barrier，promote cement hydration，significantly shorten the cement setting time and improve early strength of concrete.
Key words：hydrated calcium silicate early strength agent，sol-gel method，high-speed stirring，dispersant，performance study