关于减少混凝土收缩的几点探讨

分析研究了混凝土沉降、离析、泌水时内部颗粒的运动特征和利用混凝土养护条件、粗骨料骨架作用以及非均态成核等方法来降低混凝土的收缩．结果表明，混凝土内各颗粒的相对运动及水的高速运动导致混凝土的沉降、离析和泌水．用上述三种方法减少混凝土的收缩效果明显。

Discussion on some measures for reducing concrete shrinkage

Some features of the movement of internal particles within the concrete accompanied with settlement, segregation,and bleeding are analysed and investigated in this paper,and some methods for reducing the concrete shrinkage such as stipulating the concrete curing conditions,employing the skeleton effect of coarse aggregate,and creating nonhomogeneous phase coring are also investigated. The investigation result shows that the settlement,segregation,and bleeding of concrete is caused by the relative movement of the partieles within the concrete as well as the high-speed flow of water within it,so that the foregoing three methods can be used to reduce the concrete shrinkage with remarkable effect.