Study on Relationship Between Structure and Properties of Polycarboxylate Superplasticizer

摘要

A polycarboxylate superplasticizer (PCs) was synthesized by copolymerization of allyl polyoxyethylcne ethers (APE), acrylic acid (AA), sodium methylallyl Sulfonate (SMAS) and ethyl acrylate (EA). The effect of functional groups and branch chain on PCs properties was investigated by the test of fluidity of cement paste, retardation performance and Zeta potential of cement particles. The results showed that carboxylic groups and ethyl ester groups can improve water reducing ratio and fluidity of cement paste, and the sulfonic groups has an important contributiion to retardation performance of PCs.