氨基磺酸系减水剂ASP的吸附分散特性研究  

Investigation on Adsorption-Dispersion Characteristics of Aminosulfonic Acid-Based Superplasticizer

作　　者：刘加平[1,2] 俞寅辉[2] 冉千平[1] 周栋梁[1] 

机构地区：[1]江苏省建筑科学研究院有限公司高性能土木工程材料国家重点实验室,江苏南京210008 [2]南京工业大学材料科学与工程学院,江苏南京210008

出　　处：《建筑材料学报》2011年第6期824-828,共5页Journal of Building Materials

基　　金：国家重点基础研究发展规划(973计划)项目(2009CB623205)

摘　　要：合成了不同苯酚(P)/对氨基苯磺酸钠(SS)摩尔比(n(P)/n(SS))的系列氨基磺酸盐高效减水剂(ASP),并研究了其吸附特性与分散及分散保持性能之间的关系.结果表明:n(P)/n(SS)越大,ASP在水泥颗粒上的吸附速率越快,分散及分散保持性能出现先增强后减弱的现象.n(P)/n(SS)相同的样品,其分散能力与吸附量线性正相关.分散保持性能受其他作用影响,与溶液中ASP的浓度非线性相关.Various aminosulfonic acid-based superplasticizers(ASP) were synthesized with different mole ratios of phenol to sodium sulfanilate(n(P)/n(SS)).The effects of adsorption characteristics on dispersion and fluidity retention for cement suspensions were investigated to elucidate the action mechanism.It is found that the adsorption rate of ASP on cement grains increases with the increasing n(P)/n(SS) while dispersibility and slump retention-ability improve evidently at first and decline greatly afterward.A linear positive correlation between dispersion and adsorption amount is observed at the same n(P)/n(SS), whereas no similar conclusion is drawn between fluidity retention and the concentration of ASP in the pore solution probability due to other mechanisms.

关 键 词：氨基磺酸盐高效减水剂 吸附 分散 分散保持 

分 类 号：TU528.042.2[建筑科学—建筑技术科学]