缓释型聚羧酸系减水剂TP2000的试验研究  

Experimental investigation on performance of a slowly-released type polycarboxylic water-reducer TP2000

作　　者：李崇智[1] 马健 葛挺林 王琴[1] 刘骏超[1] 魏功晓[1] 袁荣辉 刘俊 

机构地区：[1]北京建筑工程学院北京高等学校工程结构与新材料研究中心,北京100044 [2]和创新天(北京)环保科技有限公司,北京100015 [3]广东博众建材科技发展有限公司,广东清远511500

出　　处：《混凝土》2013年第2期50-53,共4页Concrete

基　　金：北京自然科学基金资助项目(2112012);北京教育委员会基金资助项目(KM201210016009)

摘　　要：以含酯基、磺酸基的烯基单体与不饱和聚醚大单体合成了一种缓释型聚羧酸系减水剂,具有很高的分散性和保坍性能,与不同混凝土材料的适应性好,混凝土强度发展正常。单独使用时混凝土含气量3%-5%,混凝土坍落度2-3 h几乎无损失,凝结时间在13 h左右;复配使用时可以任意比例替代其他聚羧酸类减水剂,当掺量满足25%-50%时,基本上可以满足普通预拌混凝土坍落度保持1-2 h无损失的使用要求。A slowly-released type polycarboxylic water-reducer, synthesised with olefin containing esterified group or sulfonic group and macro-monomer of unsaturated polyether, had an ability of very high dispersing and slump retaining, and the good adaptability with different composited materials of concrete,and the concerning concrete had normal strength developing.There would be 3%-5% of air content in concrete, almost no slump loss during 2-3 h, about 13 h of setting time as it used alone.It could satisfy the demand of commercial concrete for keeping no slump loss during 1-2 h as used to substitute other polycarboxylate water-reducers at a content of 25%-50% in the admixture.

关 键 词：聚羧酸减水剂 缓慢释放 保坍 

分 类 号：TU528.042.3[建筑科学—建筑技术科学]