重庆大学学报：自然科学版2012，Vol.35Issue(1)：86-92,7.
泥对掺聚羧酸减水剂的水泥浆体分散性的影响
Effects of clay on the dispersibility of cement paste mixed with polycarboxylate superplasticizer
摘要
Abstract
To reveal the effect of clay on the dispersibility of polycarboxylate superplasticizer （PC）, the fluidity and viscosity of cement paste are chosen as performance indexes to study the effect of clay on the theological properties of cement paste mixed with PC. The influence of filtrate of clay on molecular structure and the regularity of adsorption of PC on the surface of clay particles in alkaline environment are also analyzed by IR and UV. The results show that PC has no dispersing effect on the cement paste when clay content reaches to 15%. Increasing the dosage of PC can reduce the negative impact of clay. The filtrate of clay can＇t change the molecular structure of PC and doesn＇t affect the dispersibility of PC. In simulated alkaline environment （saturated solution of calcium hydroxide）, the adsorption speed of clay on PC is rapid, whose adsorption capacity of clay on PC is about 4 times of cement＇s, and clay will have been reached its equilibrium adsorption amount in the initial period （within 6 min）.关键词
泥/聚羧酸减水剂/分散性/吸附/碱性环境Key words
clay/polycarboxylate superplasticizer（PC）/dispersion/adsorption/alkaline solution分类
建筑与水利引用本文复制引用
李有光,李苑,万煜,邓成,王智,钱觉时..泥对掺聚羧酸减水剂的水泥浆体分散性的影响[J].重庆大学学报：自然科学版,2012,35(1):86-92,7.基金项目
国家重点基础研究发展计划项目 （）
高性能土木工程材料国家重点实验室开放基金课题 （）
重庆大学“211工程”三期建设研究生开放实验室资助项目 （）
