CAJ | 학술논문

聚羧酸减水剂是一种新型高性能减水剂，相比前两代减水剂（木质素、萘系等）具有突出优点。该文以甲基烯丙基聚醚（ TPEG）、丙烯酸（ AA）和丙烯酸酯（ HA）等单体原材料合成聚羧酸减水剂。通过水泥净浆、砂浆和混凝土性能测试结果表明，合成聚羧酸减水剂最佳工艺条件为：引发剂和链转移剂总摩尔量分别为大单体的3％和2％，聚合温度为60℃。当n[ TPEG]∶n[ AA]＝1∶4时合成聚羧酸减水剂分散性能较佳，砂浆减水率可达38.97％；当n[ TPEG]∶n[ AA]∶[ HA]＝1∶2∶2时合成聚羧酸减水剂保坍性能突出，水泥净浆流动度2 h时保持放大，3 h内无损失。该试验合成两种聚羧酸减水剂在水泥净浆、砂浆和混凝土中对应的分散性能和保坍性能均优越于所选市售同类型的减水剂。
취최산감수제시일충신형고성능감수제，상비전량대감수제（목질소、내계등）구유돌출우점。해문이갑기희병기취미（ TPEG）、병희산（ AA）화병희산지（ HA）등단체원재료합성취최산감수제。통과수니정장、사장화혼응토성능측시결과표명，합성취최산감수제최가공예조건위：인발제화련전이제총마이량분별위대단체적3％화2％，취합온도위60℃。당n[ TPEG]∶n[ AA]＝1∶4시합성취최산감수제분산성능교가，사장감수솔가체38.97％；당n[ TPEG]∶n[ AA]∶[ HA]＝1∶2∶2시합성취최산감수제보담성능돌출，수니정장류동도2 h시보지방대，3 h내무손실。해시험합성량충취최산감수제재수니정장、사장화혼응토중대응적분산성능화보담성능균우월우소선시수동류형적감수제。
As a new type of high performance water reducer polycarboxylate superplasticizers possess outstanding advantages compared with previous ones such as lignin and naphthalene .In this article, methyl alkenyl polyoxyethylene polyoxypropylene ether (TPEG), acrylic acid(AA) and acrylate(HA) are used as raw materials to synthesize polycarboxylate superplasticizers which are tested by cement paste , mortar and concrete .And the result shows that the optimum synthesis condition i Total molar weight of initiator is 3% of macromonomer and chain transfer agent is 2%, the polymerization temperature is 60 ℃.The dispersibility of polycarboxylate superplasticizer is comparatively better when the monomer system is n[ TPEG]∶n[ AA] =1∶4.And the maximum mortar water reducing rate reaches 38.97%.The slump retaining property of polycarboxylate superplasticizer is outstanding when the monomer system is n[TPEG]∶n[AA]∶[HA] =1∶2∶2, the fluidity of cement paste keep amplifying in 2h and losses little in 3h.The dispersibility and slump retaining property of corresponding polycarboxylate superplasticizer synthesized in the test behaves better respectively in cement paste , mortar and concrete compared with the same type of commercial polycarboxylate superplasticizer .