硅酸盐通报2012，Vol.31Issue(6)：1438-1444,7.
磷酸钾镁水泥水化体系的微结构演化
Microstructure Evolution of Magnesium-potassium Phosphate Cement Paste
摘要
Abstract
In order to study microstructure evolution of magnesium-potassium phosphate cement paste, its hydration heat and compressive strength development of magnesium-potassium phosphate cement (MKPC) paste were tested, and its phase composition and microstructure were analyzed. The results show that the hydration of MKPC paste is rapid and releases large amounts of hydration heat at the beginning. The hydration reaction of MKPC paste almost completes in first 3 d, and which generates main hydrates magnesium potassium phosphate hexahydrate (MgKP04·6H2O-MKP) and some phosphate hydrates with low-bound water. The hydrates crystals have many defects and poor stability due to quick hydration and produce large internal stress in growing. The phosphate hydrates with low-bound water gradually absorb water in air and transform into MKP. The factors above result in deterioration of the structure of hardened MKPC paste, namely more cracks and defects in the section of hardened MKPC paste with curing age, and that lead to quick development of compressive strength of MKPC paste in first 3 d, the retraction of compressive strength later and gradual recovery of compressive strength further.关键词
磷酸钾镁水泥(MKPC)/水化热/抗压强度/微结构演化Key words
potassium and magnesium phosphate cement ( MKPC ) / hydration heat/ compressive strength/microstructure分类
建筑与水利引用本文复制引用
周序洋,杨建明,王进..磷酸钾镁水泥水化体系的微结构演化[J].硅酸盐通报,2012,31(6):1438-1444,7.基金项目
建设部科研开发项目(2010-K4-38),(2011-K4-23) （2010-K4-38）
