The structure and properties of highly effective anti-mud polycarboxylic acid superplasticizer,which were synthesized underdifferent ratios of acid to ether with different substitution ratios of hydroxyethyl methacrylate(HEMA)to acrylic acid(AA),were studied.The structure of the superplasticizer was characterized by infrared spectrum,and the fluidity and time loss of the cement paste of the synthetic highly mud resistant polycarboxylic acid superplasticizer were tested.The interaction mechanism between the mud resistant superplasticizer and cement and montmorillonite was investigated by X-ray diffraction.The experimental results show that when the ratio of acid to ether is 4∶1 and the proportion of HEMA replacing AA is 10%,the flow loss of sludge resistant polycarboxylic acid superplasticizer is minimal.When the cement is mixed with 0.5%montmorillonite,the fluidity of the sludge resistant polycarboxylic acid superplasticizer can still remain at 280 mm after 2 h,and the mud resistance is good.
关键词
抗泥型聚羧酸减水剂/净浆流动度/经时损失/作用机理
Key words
anti-mud polycarboxylic acid superplasticizer/slurry fluidity/warp loss/mechanism of action
维普
万方数据