机制砂石粉含量对掺火山灰混凝土性能的影响

Influence of Stone Dust Content in Manufactured Sand on Properties of Concrete with Volcanic Ash Incorpoated

以机制砂中石粉含量为参数,对比研究不同石粉含量的机制砂对高性能大山灰混凝土的工作性能、力学性能和耐久性的影响。研究结果表明:当机制砂中石粉含量为7wt%时,高性能火山灰混凝土的工作性能最佳,抗压强度和抗压弹性模量均达到最大值;对于耐久性,当石粉含量达到7wt%的标准,可以判定此时混凝土抗碳化性能水平最高,同时,氯离子扩散系数处在最小数值范围。

Effects of stone dust content on workability, mechanical properties and durability of concrete with volcanic ash incorporated were investigated by controlling the stone dust content in manufactured sand. Experimental results show that concrete with stone dust content in manufactured sand of 7 wt% exhibits optimal workability and maximum compressive strength and elastic modulus. And for durability, the optimal anti-carbonation property and the lowest value of chloride diffusion coefficient were observed for the stone dust content of 7 wt%.