新型聚羧酸系保坍剂的合成与性能研究  

Research on Synthesis and Performance of Polycarboxylic Slump Retaining Admixture

作　　者：廖国胜[1] 何正恋[1] 刘佩[1] 

机构地区：[1]武汉科技大学,武汉430065

出　　处：《建材世界》2013年第4期1-4,共4页The World of Building Materials

基　　金：湖北省自然科学基金(2010CDZ062)

摘　　要：根据减水剂的"吸附-分散"作用机理,通过一步法使改性聚醚与不饱和羧酸共聚,在引入阴离子表面活性基团的条件下,制备出一种具有羧基、羟基、磺酸基等阴离子活性基团的高性能聚羧酸保坍剂。通过对掺加该聚羧酸保坍剂进行水泥净浆流动度试验、水泥适应性试验、混凝土应用性能试验以及对其进行红外光谱分析,测试聚羧酸保坍剂的性能。Based on the ＂adsorption-dispersion＂ mechanism of polycarboxylate water reducer, under the condition of the introduction of anionic surface active groups, this paper compounded a high performance of carboxyl, hydroxyl, sulfa anionic active groups polycarboxylic slump retaining admixture by one-step method modified polyether with unsaturated carboxylic acid copolymer. By experiment with polycarboxylic adding slump retaining admixture for cement slurry flu- idity test, cement adaptability test, concrete application performance test and the infrared spectrum analysis, the per- formance of the potycarboxylic slump retaining admixture was tested.

关 键 词：共聚 阴离子活性基团 保坍剂 

分 类 号：TU528.042[建筑科学—建筑技术科学]