聚羧酸系与萘系复合高效减水剂的吸附特性及ζ电位研究  

Study of Adsorption and C Potential of Polycarboxylate and Naphthalene Compounded Superplasticizer

作　　者：吴芳[1] 李乐民[1] 杨长辉[1] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400045

出　　处：《化学建材》2005年第5期50-54,共5页Chemical Materials for Construction

摘　　要：研究了聚羧酸系减水剂与萘系减水剂在水泥-水体系中的吸附情况,以及两种减水剂复合后对体系ζ电位的影响。试验结果表明,聚羧酸系减水剂的饱和吸附量和饱和掺量都比萘系减水剂低;复合减水剂的ζ电位低于萘系减水剂,但复合减水剂ζ电位随时间的降低程度低于萘系减水剂。本文对复合减水剂的吸附规律和作用机理也进行了分析。Study was made of adsorption of polycarboxylate-based water reducer and naphthalene-based water reducer in cement-water system as well as effects of these two water reducers after compounding on ξ potential. Testing results indicated that both saturated adsorbance and saturated dosage of polycarboxylate-based water reducer were lower than those of naphthalene-based water reducer, ξ potential of compounded superplasticizer was lower than that of naphthalene-based water reducer yet ξ potential of compounded superplasticizer became lower along with time decrease than that of naphthalene-based water reducer, Adsorotion law and effect mechanism of compounded superplasticizer was also analyzed.

关 键 词：高效减水剂 聚羧酸系 萘系 复合 吸附 ξ电位 

分 类 号：TU528.042[建筑科学—建筑技术科学]