混凝土减缩剂的作用机理及其应用效果

Action mechanism and effect of application of concrete shrinkage reducing admixture

由于混凝土干燥收缩及自收缩而产生的应力 ,对于脆性较大的混凝土结构来说 ,当其受到来自结构内部或外部的限制时 ,往往会导致材料的开裂 ,这会严重地影响混凝土结构的强度和耐久性。本文讨论了混凝土干燥收缩及自收缩的机理 ,然后给出了减缩剂 (SRA)

? Due to the stress which has been formed from the dry shrinkuge and autogenous shrinkage in concrete,for the brittle concrete structure.When it is restrained by the inner or outer stress,it is likely to crack.Thus can ceriously affect the strength and durability of concrete structutre.This paper mainly explain the dry shrinkage and autogenous shrinkage mechanism in concrete,then discuss how the concrete shrinkage reducing admixture efficiently deals with the free dry shrinkage、autogenous shrinkage and restraince shrinkage in concrete. 〔