减缩剂对掺化学外加剂水泥浆体结构的影响

 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。

Influence of Shrinkage-reducing Agent on Cement Paste Structural Formation with Chemical Admixtures

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 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.