摘要
用Na2SiO3.9H2O,Ca(NO3)2.4H2O化学纯试剂及聚羧酸类减水剂、脂肪族类减水剂合成了纯水化硅酸钙及掺聚羧酸有机大分子的水化硅酸钙、掺脂肪族有机大分子的水化硅酸钙。用氮吸附法测定了上述水化硅酸钙的孔结构参数,运用Frenkel–Halsey–Hill(FHH)模型、Neimark模型分析了它们的表面分形特征且比较了2种模型计算结果的异同。结果表明:2种有机大分子的插层作用和“开孔”效应使水化硅酸钙的比表面积显著增大;聚羧酸有机大分子有利于水化硅酸钙形成小尺寸中孔,而脂肪族有机大分子有利于水化硅酸钙形成大尺寸中孔。掺聚羧酸有机大分子的水化硅酸钙表面最光滑。由FHH方程和Neimark方程计算得到的结果基本一致。
Pure calcium silicate hydrates and two samples containing organic macromolecule were synthesized by chemical agents Na2SiO3·9H2O, Ca（NO3）2·4H2O and organic compounds such as polycarboxylic superplasticzer, polyaliphatic-type superlasticizer. Their pore structure characteristics were determined by N2 adsorption, and the surface fractal characteristics of the three samples were analyzed based on Frenkel-Halsey-Hill （FHH） model and Neimark model, respectively. The differences caused by the two different methods were also compared. The results show that the intercalation and the pore opening effect of the two different organic macromolecule make the specific surface areas of calcium silicate hydrates increase remarkably, polycarboxylic superplasticzer is in favor of forming small mesopore in calcium silicate hydrates, while polyaliphatic-type superlasticizer contributes to generating large mesopore. It also indicates that the surface of calcium silicate hydrates containing polycarboxylic superplasticzer is most smooth, and the computational results of FHH equation and Neimark equation are consistent well.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2006年第12期1497-1502,共6页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金(50302008)
关键词
水化硅酸钙
有机大分子
氮吸附
孔结构
分形维数
calcium silicate hydrates
organic macromolecule
nitrogen adsorption
pore structure
fractal dimension
作者简介
张文生（1969～），男，博士，教授。E-mail：zhangwensheng@cbmamail．com．cn
