A study on the preparation of anti-clay agent based on polycarboxylate
LUO Yuanbing
ZHANG Zhiqiang
Abstract：Selecting acrylamide(AM),diallyldimethylammonium chloride(DMDACC),acyclic acid(AA),2-(Dimethylamino)ethyl methacrylate(DMAEMA)as polymeric monomers,sodium methallyl sulfonate(SMAS)as the chain transfer agent,ammonium per-sulfate(APS)and ascorbic acid(Vc)as the initiators,the anti-clay agent was synthesized based on polycarboxylate superplasticizer by using aqueous solution polymerization. To optimize the reaction conditions by orthogonal array design and single factor experi-ment. The fluidity of cement paste within doped bentonite was taken as indexes. The test results show that optimized process to be n(AA):n(DMDACC):n(AM):n(SMAS)=3.6:1.4:2.5:0.5,the reaction time is 65℃,m(APS-Vc)is 6% of all monomers. Under the optimized conditions,adding 0.05% anti-clay agent,the fluidity of cement paste mixing with 5% bentonite and 0.15% PCE is 270 mm. Under the same condition without anti-clay agent,the fluidity of cement paste is just 205 mm.
Keywords：anti-clay agentpolycarboxylate superplasticizersynthesis
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 46-49 )