硅酸盐通报2024，Vol.43Issue(11)：4150-4158,9.
花岗岩废石粉对砂浆强度及耐久性能的影响
Effect of Granite Waste Powder on Strength and Durability of Mortar
摘要
Abstract
In view of the problems of large output and serious environmental pollution of granite waste powder(GWP),the activity of GWP at different ball milling times(0,10,20 and 30 min)and the effect of equal mass substitution(0%,10%,20%and 30%)on the macro and micro properties of GWP mortar were investigated.The experimental results show that the GWP activity after ball milling for30 min is high,reaching72.98%.As the GWP replacement rate increases from 10%to 30%,the flexural strength,compressive strength and dynamic elastic modulus of the mortar decrease by6.31%～23.94%,3.02%～26.11%and 5.35%～24.29%,respectively.The carbonization depth and chloride ion permeability coefficient of the mortar increase by20.43%～81.40%and2.31%～20.61%,respectively.The addition of GWP makes the mortar microstructure deteriorate,cracks and holes increase,and harmful holes increase.Based on the established relationship between the GWP replacement rate and the strength,durability of the mortar,the optimal replacement rate of GWP is from 12.37%to 21.74%,in which the performance of GWP mortar is still close to that of the benchmark group although there is a certain degree of decrease.Comparing the energy consumption and economic cost of GWP mortar with different substitution rates,each additional 10%of GWP used to prepare unit volume of mortar can reduce energy consumption by 107.08 MJ and economic cost by 46.01 yuan.关键词
花岗岩废石粉/活性/取代率/强度/耐久性能/微观结构Key words
granite waste powder/activity/replacement rate/strength/durability/microstructure分类
化学化工引用本文复制引用
申屠存,郑广远,谭幸淼,周明素,胡赛群,梁超锋..花岗岩废石粉对砂浆强度及耐久性能的影响[J].硅酸盐通报,2024,43(11):4150-4158,9.基金项目
2022年国家级大学生创新创业训练计划(202210349019) （202210349019）
