The Compatibility of Polycarboxylate-Type Superplasticizers with Cement  

作　　者：李崇智 

机构地区：[1]Department of Civil Engineering, Beijing Institute of Civil Engineering and Architecture

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2005年第3期95-98,共4页武汉理工大学学报（材料科学英文版）

基　　金：SupportedbyFoundationofDoctor’sScientificResearchStartupofBeijingInstituteofCivilEngineeringandArchitecture(ky2005)

摘　　要：Four polycarboxylate- type （ PC ） superplasticizers of different functional groups were used ; their dispersing and retaining behaviors were analyzed through ZETA potential measurement, mini-slump test of cement paste and performance test of concrete. The experimental results show that the dispersing and flow-retaining ability of PC was determined by two factors of anionic groups and nonionic groups ： the density of anionic groups - COO^- or - SO3^- acted on the electronic repulsive force. and the length and proportion of nonionic graft groups of PEO in PC chemical stracture affected the steric effect. The compatibility between PC superplasticizers and cement mainly depended on the type of PEO groups ; furtlwrmore, adding mineral powders is good to the compatibility for high performance concretes （ HPCs ）.Four polycarboxylate- type （ PC ） superplasticizers of different functional groups were used ; their dispersing and retaining behaviors were analyzed through ZETA potential measurement, mini-slump test of cement paste and performance test of concrete. The experimental results show that the dispersing and flow-retaining ability of PC was determined by two factors of anionic groups and nonionic groups ： the density of anionic groups - COO^- or - SO3^- acted on the electronic repulsive force. and the length and proportion of nonionic graft groups of PEO in PC chemical stracture affected the steric effect. The compatibility between PC superplasticizers and cement mainly depended on the type of PEO groups ; furtlwrmore, adding mineral powders is good to the compatibility for high performance concretes （ HPCs ）.

关 键 词：PC superplasticizers CEMENT compatibility 

分 类 号：TU528[建筑科学—建筑技术科学]