合成接枝型聚丙烯酰胺——新一代水下不分散混凝土絮凝剂  

Synthetic graft polyacrylamide——a new flocculating agent of under water anti-washout concrete

作　　者：林鲜[1] 徐海彬[1] 周伟[1] 张长民[1] 沙林浩[1] 丁新龙[1] 

机构地区：[1]中国石油天然气集团公司工程技术研究院,天津300451

出　　处：《混凝土》2003年第4期25-27,共3页Concrete

摘　　要：　本研究首创性地应用自己合成改性的接枝型丙烯系聚合物作为水下不分散混凝土絮凝剂,研究了由该种絮凝剂配制的水下不分散混凝土的性能。结果表明:掺合成改性的聚合物的水下不分散混凝土性能与掺常用的聚合物相比,前者可保持混凝土坍扩度1小时不损失,而后者只有0 5小时;前者的7天和28天水下混凝土抗压强度分别较后者高约2MPa和4MPa;新型改性聚合物成本比传统使用的下降约25%,取得良好的技术经济效果,目前已在山东投产应用。Synthetic graft polyacrylamide(GPAM)was originally used as flocculating agent of under water antiwashout concrete(UWAWC).It showed that the retention of flocability of concrete admixed with GPAM reached one hour,but half an hour with common polyacrylamide.The compressive strengths of UWAWC admixed with GPAM were enhanced 2 and 4MPa,7d and 28d respectivelycompared with addition common polyacrylamide.The cost of GPAM is less 25% compared with common polyacrylamide.It has been put into production.

关 键 词：水下不分散混凝土 聚合物改性 坍扩度损失 抗压强度 絮凝剂 

分 类 号：TU528.042.7[建筑科学—建筑技术科学]