高性能防水喷射混凝土用粉状速凝剂的研究及应用

Research and application of powder setting accelerator for high performance water-proof sprayed concrete

本文对目前国内普遍生产的用于C2 0喷射混凝土的粉状速凝剂从作用机理、最佳掺量、铝氧熟料 (AOC)的生产控制 ,填充料、增强料的配合使用等方面进行了改进研究。生产出了具有早期强度更高、抗渗指标高、2 8天强度比达到约 90 % (现粉状速凝剂普遍为 70 %左右 ,一般超不过 75 % )的用于高性能防水喷射混凝土的粉状速凝剂。并对该新产品进行了工程应用 ,强度、抗渗指标均取得了满意的效果。期望通过本研究 ,提高粉状速凝剂的各项性能指标 ,促进干法喷射混凝土的施工技术水平和经济技术综合效益 。

The author of this paper aimed at improving the powder accelerative admixture of shotcrete at present time in China to meet the need of tunnel construction and studied the powder accelerative admixture in several aspects.According to the study results,the author produced high performance powder accelerative admixture of shotcrete,and apply it in tunnel engineering successfully.