自密实混凝土的收缩性能研究

近年来,自密实混凝土由于具有良好的施工性能和填充性能,并在硬化后具有良好的力学性能和耐久性,从而在工程应用中得到越来越多的关注.但随着水胶比的降低和矿物掺合料的掺入,使得自密实混凝土的体积稳定性变得不容忽视,尤其是自收缩,它已经成为产生裂缝的主要原因之一,严重影响到自密实混凝土的耐久性.基于自密实混凝土的研究和应用现状,对自密实混凝土收缩的影响因素、试验方法以及研究的重要性进行了探讨.从工程实际出发,考虑自密实混凝土的复杂特性,对自密实混凝土的收缩性能进行综合分析.

Shrinkage of self-compacting concrete

Self-compacting concrete features good construction and filling performance.The good mechanical properties and durability are obvious when concrete was hardened.In recent years,it is obtained more and more attention on projects.However,with the reduction of water to cement ratio and the incorporation of mineral admixture,the volume stability of self-compacting concrete can not be ignored.Especially the autogenous shrinkage,it has already become one of the main reasons for cracking and influenced the durabil...