硅酸盐通报2018，Vol.37Issue(2)：391-397,7.
纳米SiO2对聚羧酸减水剂的吸附作用研究
Study of Adsorption Effect of Nano-SiO2 on Polycarboxylate Superplasticizer
摘要
Abstract
The adsorption effect of nano-SiO2 on superplasticizer were studied by using the infrared spectroscopy,ultraviolet-visible spectrophotometer,and zetasizer nano was used to study the effect of superplasticizer on the dispersion of nano-SiO2 and the fluidity of the paste.The research results show that polycarboxylate superplasticizer is adsorbed by nano-SiO2 and the adsorption amount increase with the increasing of the concentration of the superplasticizer,when the concentration of the superplasticizer increased to 5 g/L,the adsorption amount approach saturation.With the addition of superplasticizer,the dispersion of nano-SiO2 is greatly reduced,the particle size of the nano-SiO2 increase and the particle size distribution curve shift to the larger particles.The nano-SiO2 is dissolved in the mixed water firstly,next mixing with cement,and then adding water reducing agent,which can reduce the adsorption of nano-SiO2 to water superplasticizer,increase the utilization efficiency of superplasticizer,and improve the fluidity of cement paste.关键词
纳米SiO2/聚羧酸减水剂/吸附作用/分散性/流动性Key words
nano-SiO2/polycarboxylate superplasticizer/adsorption/fluidity/dispersion分类
建筑与水利引用本文复制引用
肖佳,申闯,李允,王大富,左胜浩..纳米SiO2对聚羧酸减水剂的吸附作用研究[J].硅酸盐通报,2018,37(2):391-397,7.基金项目
国家自然科学基金(51278497) （51278497）
