Preparation and performance study of EPEG mud-resistant polycarboxylic acid water reducing agent
In this paper,the EPEG mud-resistant polycarboxylic acid water reducing agent KN-E was synthesized by free rad-ical copolymerisation reaction under constant temperature with ethylene glycol monovinyl polyglycol ether(EPEG)as the macromonomer,and small monomers such as acrylic acid(AA)and isomer ester(MA).The effect of KN-E mud-resistant polycar-boxylic acid water reducing agent synthesized under different reaction conditions on the dispersion and adaptability of cement was investigated by using cement paste test,and the mud-resistant property of KN-E mud-resistant polycarboxylic acid water reducing agent was verified by concrete test.The results showed that the mud-resistant polycarboxylic acid water reducing agent KN-E pre-pared when the monomer ratio was n(AA)∶n(TPEG)∶n(MA)=4.0∶1∶0.2 had good dispersion properties and good adaptability,and showed good mud-resistant properties and good workability when it was applied to concrete,and it contributed to the early concrete strength development.
EPEGpolycarboxylic acid water reducing agentfunctional monomermud resistance
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