新型聚羧酸水泥助磨剂的合成及应用  

Synthesis and application of new polycarboxylate cement grinding aids

作　　者：卫晓慧[1] 王自为[1] 任建国 裴继凯 何强 

机构地区：[1]山西大学化学化工学院,山西太原030006 [2]山西合盛邦砼建材有限公司,山西太原030006

出　　处：《混凝土》2013年第2期147-151,共5页Concrete

摘　　要：以马来酸酐MA与三乙醇胺TEA反应合成小单体M,后与烯丙基聚乙二醇APEG、MA在水溶液中进行自由基共聚合成新型聚羧酸水泥助磨剂,并对该聚合物进行性能测试。结果表明:n(APEG)∶n(MA)∶n(M)=1∶1∶0.6,引发剂用量为单体总质量的4%,在75℃下反应5 h时,合成的助磨剂效果最佳。将该助磨剂应用于水泥粉磨试验,相比于空白水泥样,45μm筛余量降低19.5%,80μm筛余量降低30.5%,3 d抗压强度提高14.2%,28 d抗压强度提高10.8%,助磨效果良好,且明显优于TEA小分子助磨剂。A new type of polycarboxylate cement grinding aids was synthesized by radical copolymerization of allyl polyethylene glycol, maleic anhydride and small monomer prepared by and triethanolamine in aqueous solution.The optimum synthesis conditions were as follow： n （APEG） ：n （MA） ：n （M）=I ： 1：0.6, initiator of monomer 4%, reaction temperature of 75℃ for 5 h.The polymer was characterized by clinker grinding test and the results showed that polycarboxylate cement grinding aids had more effective grinding property, compared to standard sample and triethanolamine series grinding aids.

关 键 词：水泥助磨剂 聚羧酸盐 三乙醇胺 助磨效果 

分 类 号：TU528.042[建筑科学—建筑技术科学]