新型聚羧酸系保塑剂的性能研究  

Study on performance of neotype polycarboxylate-plastic retaining admixture

作　　者：龚英[1] 段国荣 黄国泓[1] 

机构地区：[1]南京水利科学研究院瑞迪高新技术公司,江苏南京210024

出　　处：《新型建筑材料》2010年第11期8-10,共3页New Building Materials

基　　金：中国博士后科学基金资助项目(20090461120);江苏省自然科学基金(BK2008520);江苏省博士后科研资助计划项目(0901008C)

摘　　要：针对混凝土坍落度损失较快问题,研制了一种梯形结构聚羧酸系保塑剂,对该保塑剂的性能研究结果表明,在低掺量时具有高坍落度保持能力,其混凝土工作性好,与水泥适应性良好,与减水剂复配后效果明显优于单掺。掺入保塑剂后,可明显减缓水泥早期水化放热速率,有利于提高混凝土的抗裂性。A trapezoidal frame polycarboxylate-plastic retaining admixture was synthesized to solve the problem of quick slump loss in concrete. Performance of the plastic retaining admixture was particularly studied. Results show that even using small dosage of the plastic retaining admixture could have excellent slump retaining capacity and make good workability of concrete： it has good compatibility with cements;effect of product mixed with superplastieizer is obviously better than that of single using. Using the plastic retaining admixture could obviously reduce and delay early hydrated heat release rate,which is benefit for improving the crack resistance of concrete.

关 键 词：聚羧酸 保塑性 适应性 水化热 复配 

分 类 号：TU528.042[建筑科学—建筑技术科学]