玻璃粉对掺矿粉和掺粉煤灰混凝土的抗氯离子渗透性的影响  

The influence of glass powder on the anti-chloride ionpermeability of slag powder and fly ash concrete

作　　者：金霞 JIN Xia(Wuhan Urban Construction Group Co.,Ltd.,Wuhan 430010,China)

机构地区：[1]武汉城市建设集团有限公司,湖北武汉430010

出　　处：《粘接》2022年第8期88-91,共4页Adhesion

摘　　要：为了保护环境减少污染,降低二氧化碳排放量,提高混凝土抗氯离子渗透性,展开玻璃粉对掺矿粉与掺粉煤灰混凝土的影响试验研究。对实验中胶凝材料,选用矿物掺合料,分别设计不同的掺合料取代等质量水泥,设计了不同的试验条件,对于水泥取代率、水胶比和龄期差异化试验条件下,对比NEL法测定混凝土的抗氯离子扩散系数。通过对比相关系数,发现玻璃粉、粉煤灰、矿渣粉、煤矸石粉,均有良好火山灰活性,掺入这些优质矿物掺合料,能够有效降低混凝土的氯离子扩散系数,改善混凝土的孔隙结构增强渗透性,在30%取代率时抗氯离子渗透性最优;取代率在40%以内,这几类矿物掺合料等质量取代水泥混凝土,所得抗压强度、劈裂抗拉强度密切相关水胶比;表明具有可行性,能够优化混凝土力学性能。In order to protect the environment,reduce pollution,reduce carbon dioxide emissions,and improve the resistance of concrete to chloride ion permeability,an experimental study on the effect of glass powder on concrete mixed with slag powder and fly ash was carried out.For the cementing material in the experiment,mineral admixtures were selected,and different admixtures were designed to replace cement of equal quality,and different test conditions were designed.For the cement substitution rate,water-binder ratio and age difference test conditions,compare The NEL method determines the anti-chloride ion diffusion coefficient of concrete.By comparing the correlation coefficients,it is found that glass powder,fly ash,slag powder,and coal gangue powder all have good pozzolanic activity.The incorporation of these high-quality mineral admixtures can effectively reduce the chloride ion diffusion coefficient of concrete and improve the pore structure of concrete enhanced permeability,the best resistance to chloride ion permeability when the substitution rate is 30%;the substitution rate is less than 40%,these types of mineral admixtures replace cement concrete,and the resulting compressive strength and split tensile strength are closely related to the water-binder ratio,indicating that it is feasible and can optimize the mechanical properties of concrete.

关 键 词：玻璃粉 掺矿粉 掺粉煤灰混凝土 抗氯离子渗透性 

分 类 号：TU502[建筑科学—建筑技术科学]