ADSORPTION BEHAVIOR OF POLYCARBOXYLATE WATER REDUCERSON CEMENTITIOUS MATERIALS

摘要：

　　The adsorption behavior of polycarboxylate water reducers (PCs) on cementitiousmaterials was researched from the respect of molecular mass and its distribution.The effects of adsorption behavior of PCs on the dispersibility and dispersion retention capability were analyzed.The results show that adsorption amount of PCs with a higher average molecular mass on the surface of cement particle is higher compared with that of PCs with a lower molecular mass.And those PCs fractions with a high molecular mass adsorb preferentially on the surface of cement particle.For the same PCs, the fluidity of cement paste increases with the increasing adsorption amount on the surface of cement particles, and the fluidity of cement paste and adsorption amount of PCs presents a positive correlation.For the different PCs, however, the correlation between the two mentioned above is poor.The research on the different adsorption behavior of PCs on the surface of cement, fly ash and ground granulated blast-furnace slag(GGBFS) contributes to guiding the design of molecular structure and to improving the compatibility between PCs and cementitious materials.

关键词： Polycarboxylate water reducers Molecular mass and its distribution Adsorption Dispersibility Cementitious materials

作者: Shun Li Shengnian Wang Qijun Yu

作者单位: Key Laboratory of Building Material of China Communications Construction Company,Fourth Harbor Engin School of Materials Science and Engineering, South China University of Technology,Guangzhou 510640,

会议类型: 国际会议

会议名称: The 3rd International Conference on Service Life Design for Infrastructure(2014第三届基础设施服役寿命设计国际会议)

会议地点: 珠海

会议语种:英文

页码: 483-490

在线出版日期: 2014-10-15（万方平台首次上网日期，不代表论文的发表时间）