Study on the mechanism of the decreasing of polycarboxylates water reduction caused by clay exited in aggregates
In order to investigate the mechanism of clay exited in aggregates on the decreasing of polycarboxylate (PC)s water reduction effect,the dispersal effects of PC on clay and cement were compared,and the influence of the dosage of clay and the adding order of clay and PC on the slump flow of cement paste were also studied.The results showed that PC had no dispersal effect on clay.With the dosage increased of clay,the slump flow of paste reduced,and it could not be improved significantly by the dosage increase of PC.The adding order of PC and clay added into the cement paste could remarkably influence its workability,if PC were added into the paste earlier than clay,the addition of clay had only a little impaction on its workability.Otherwise,it could be obviously effected by the addition of clay if PC were added into the paste later than clay.
Polycarboxylate cement clay absorption
Gao Guibo Wang Yongwei Ba Hengjing Wang Kaiyu
Shandong Provincial Academy of Building Research, Jinan, 250031, China School of Civil Engineering, Harbin Institute of Technology, Harbin 150001, China
国际会议
上海
英文
38-38
2012-10-19（万方平台首次上网日期，不代表论文的发表时间）