摘要
通过对水泥浆体干缩、电阻率和强度性能的分析,研究了减缩剂对化学外加剂作用下水泥浆体结构形成与发展的影响。结果表明:从减缩的角度来看,减缩剂与减水剂的相容性较好,且基本上不受调凝组分的影响;从浆体强度的角度来看,减缩剂与减水剂的相容性较差,减缩剂与调凝组分的相容性与缓凝剂类型、金属阳离子有关;减缩剂抑制了浆体水化初期离子的溶出,具有一定的缓凝作用,对结构形成期具有一定的促进作用,但结构的形成并没有伴随着力学性能的增强。
The influence of shrinkage-reducing agent on cement paste structural formation was studied by the analysis of drying-shrinkage, resistivity and compressive strength. The results showed that：from from the view point of drying-shrinkage, the compatibility of shrinkage-reducing agent and water-reducing agent is well, and is not affected by retarders or accelerators; from the view point of compressive strength, the compatibility of shrinkage-reducing agent and water-reducing agent is faint, and the compatibility of shrinkage-reducing agent and retarders or accelerators is related to the kinds of retarders and cations. Ion solution is restrained initially by shrinkage-reducing agent, also the cement hydration retarded slightly, the stage of structural formation accelerated, but the cement strength dropped.
出处
《长江科学院院报》
CSCD
北大核心
2006年第3期40-42,46,共4页
Journal of Changjiang River Scientific Research Institute
基金
国家"973"项目(2001CB6107043)
湖北省科技攻关项目(200410G0121)
关键词
减缩剂
化学外加剂
浆体
结构形成
shrinkage-reducing agent
chemical admixture
cement paste
structural formation
