Study on synthesis and properties of EPEG type amphoteric polycarboxylate superplasticizer
EPEG type amphoteric polycarboxylate superplasticizer PCE-EADS were synthesized by free radical aqueous solution polymerization reaction of a new type of macromonomer ethylene glycol monovinyl polyethylene glycol ether(EPEG),acrylic acid(AA),acryloyloxyethyl trimethyl ammonium chloride(DAC)and sodium p-styrenesulfonate(SSS)as macromonomer,and the structure of the target product was analyzed and characterized by FTIR and 1H NMR,the dispersion performance of water reducing agents on cement was tested through the flowability of cement slurry and concrete properties.The results show that PCE-EADS has better dispersion than ordinary EPEG type polycarboxylate superplasticizer.PCE-EADS has better dispersion and slump retaining proper-ties than the commercial polycarboxylate superplasticizer product Point-S,and under the same conditions,the dosage is less than that of Point-S,and the compressive strength of concrete at 7 and 28 days is higher.
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维普
