水下不分散混凝土胶凝材料浆体水化性能  

Hydration of the Pastes of Underwater Anti-washout Concrete

作　　者：林鲜[1] 阎培渝[2] 沙林浩[1] 冯爱丽[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 [2]清华大学土木工程系,北京100084

出　　处：《混凝土》2001年第2期24-29,共6页Concrete

摘　　要：本文应用DTA、TG、XRD、SEM等现代分析手段 ,研究目前较多应用的掺聚丙烯酰胺抗分散剂和磨细矿渣的水下不分散混凝土的水化性能。研究表明 ,聚丙烯酰胺将与水泥水化产物Ca(OH ) 2 反应形成有机钙 ,聚丙烯酰胺系抗分散剂将均匀分布在胶凝材料硬化体中 ,形成空间网状结构 ,磨细矿渣加入提高胶凝材料硬化体的机械性能。In this paper,the hydration of a novel underwater anti-washout concrete containing synthetic polyacrylamide and superplasticize and grounding blast furnace slag was studyed by DTA,TG,XRD,SEM.It was shown that anti-washout additive was homogeneously distributed bo form space net structure in concrete.The polyacrylamide was reacted with Ca~ 2+ released from cement hydration to form-COO-Ca-OOC-and HO-Ca-OOC-.As a result,the space net structure of polymer in concrete was strengthened,the crystalline Ca(OH) 2 in pastes were minimized and the density of mature pastes was reduced.The mechanical properties of concrete added blast furnace slag were enhanced.

关 键 词：水下不分散混凝土 复合胶凝材料 抗分散剂 微观结构 水化机理 

分 类 号：TV431[水利工程—水工结构工程]