Preparation and Cement Fluidity of Slow-Release Polycarboxylate-Type Superplasticizer

Xia Lv; Cheng Bing Yu; Wen Ying Qi

doi:10.4028/www.scientific.net/AMR.399-401.1307

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Preparation and Cement Fluidity of Slow-Release Polycarboxylate-Type Superplasticizer

Abstract:

High performance polycarboxylate-type superplasticizer (PCSP) was synthesized with acrylic acid (AA), polyethylene glycol allyl ether (APEG) and one monomer of methyl acrylate (MA), methacrylate acid (MAA), acrylamide (AM), and ethyleneglycol dimethacrylate (EGDMA). Ammonium persulfate and thioglycolic acid, as an initiator and a molecular weight regulator respectively, were used for radical polymerization in aqueous solution. Influence of superplasticizer on the cement fluidity of grout was investigated. The results showed that plasticizer admixture compounded with EGDMA-APEG-AA had excellent dispersibility and slump retention.