聚羧酸盐减水剂与水泥的吸附性能研究

摘要

Adsorption of polycarboxylate-based superplasticizer in cement-water system was studied by gel chromatography method. Testing results indicated that the adsorption behavior fellows a Langmuir isothermal adsorption model. The structure of polycarboxylate superplasticizer is comb-like, so it has a saturated low adsorption amount and a weak electrostatic repulsive effect, and its dispersion mainly comes from steric effect generated by the adsorption layer.%采用凝胶色谱法研究了自制聚羧酸盐减水剂在水泥-水体系中的吸附情况.试验结果表明,其吸附等温线基本符合Langmuir等温方程.聚羧酸盐减水剂为梳状结构,吸附量较小,静电斥力效应较弱,其分散作用主要来自于吸附层空间位阻效应.