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.
出处
《建筑材料学报》
EI
CAS
CSCD
北大核心
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)
关键词
氨基磺酸盐高效减水剂
吸附
分散
分散保持
aminosulfonic acid-based superplasticizer
adsorption
dispersion
fluidity retention
