适合碾压混凝土的缓凝型聚羧酸类减水剂的研制  

Research on polycarboxylic series set-retarding water-reducer for RCC

作　　者：高培伟[1] 吴胜兴[1] 卢小琳[1] 林萍华[1] 吴中如[1] 

机构地区：[1]河海大学土木工程学院,江苏南京210098

出　　处：《河海大学学报（自然科学版）》2005年第5期563-566,共4页Journal of Hohai University(Natural Sciences)

基　　金：国家重点基础研究发展规划"973"资助项目(2001CB61070503);江苏省博士后基金资助项目

摘　　要：根据碾压混凝土的性能特点和施工要求,研制开发了一种水溶性高分子化合物,即含有磺酸根、羧酸根、羟基和氨基等多种官能团的缓凝型非萘系高效减水剂.与萘系类相比,该高效减水剂具有掺量低,减水率大,坍落度损失小,能延缓凝结时间,提高碾压混凝土的可碾性、耐久性,减少水化温升和水泥适应性较好等特点.According to experimental study and construction practice of roller compacted concrete（RCC）, a new type of set-retarding water-reducer with-COO^-,-SO^3-,-OH, and-NH2 for construction of RCC dams under high temperature condition was developed. This kind of water-reducing agent is of such advantages as low admixing volume, high water reduction, and low slump loss as compared with naphthalene water-reducing agent. The agent also prolongs the RCC setting time, improves its compaction, decreases hydration heat-induced temperature rise, and enhances its durability, and is of high adaptability to cement.

关 键 词：缓凝型高效减水剂 碾压混凝土 羧酸基 磺酸基 低坍落度损失 

分 类 号：TU528[建筑科学—建筑技术科学]