机制砂中石粉对混凝土性能的影响试验研究

Experimental Study on the Influence of Stone Powder in Manufactured Sand on Concrete Performance

本文主要介绍了各国各地区对机制砂的石粉限定标准的不同及其原由,分析了机制砂中石粉的影响机理,阐述了机制砂代替天然砂生产各类混凝土的应用前景,进而探究机制砂中石粉对配置自密实混凝土和常态混凝土的性能影响,选取了超过国家标准不同范围内的机制砂进行混凝土的配制,对机制砂代替天然砂生产不同强度的混凝土进行了试验,对机制砂代替天然砂配置不同强度的混凝土的可行性进行了分析,对机制砂中石粉的进一步研究提出了相应建议。

This paper mainly introduces the difference of the standard of stone powder in the mechanism sand and its original causes in different regions of various countries, and the influence mechanism of stone powder in mechanism sand is analyzed in this paper. It expounds the application prospect of the mechanism sand replacing the natural sand to produce all kinds of concrete, and then explores the influence of the stone powder in the mechanism sand on the performance of the self-compacting concrete and normal concrete. And the mechanism sand of more than national standards within different ranges is selected to the preparation of the concrete. So, mechanism sand, not the natural sand, is tested to produce concrete with different strength. And in this paper, not only the feasibility of the mechanism sand instead of natural sand to configure concrete with different strength is analyzed, but also the corresponding suggestions for further study of stone powder in the mechanism sand are put forward.