硅酸盐通报2024，Vol.43Issue(10)：3686-3693,8.
硫酸盐干湿循环作用下煤矸石喷射混凝土劣化机理
Deterioration Mechanism of Coal Gangue Shotcrete under Dry-Wet Cycles of Sulfate
摘要
Abstract
In order to promote the large-scale utilization of coal gangue in coal mine areas under high sulfate environment,this article prepared shotcrete with different coal gangue substitution rates,and studied the influence law of coal gangue on the sulfate attack resistance of shotcrete under the action of dry-wet cycles.The appearance,mass loss rate,relative dynamic elastic modulus,relative compressive strength,sulfate ion distribution evolution and micromorphology changes before and after erosion were studied,and the influence mechanism of coal gangue on the sulfate attack resistance of shotcrete was obtained.The results show that under the action of sulfate dry-wet cycles,the deterioration process of coal gangue shotcrete(CGS)is divided into three stages:strengthening stage,initial damage and macroscopic damage.The deterioration degree of CGS is synergistically affected by the number of dry-wet cycles and the substitution rate of coal gangue.The sulfate resistance of CGS increases at a substitution rate of 25％(mass fraction).When the substitution rate exceeds 25％,the sulfate attack resistance of CGS decreases with the increase of substitution rate.The research results provide important theoretical support for the application of CGS structures in mines.关键词
硫酸盐侵蚀/煤矸石/喷射混凝土/干湿循环/劣化规律/损伤机理Key words
sulfate attack/coal gangue/shotcrete/dry-wet cycle/deterioration law/damage mechanism分类
建筑与水利引用本文复制引用
刘超,蔡建赟,朱超,姚羿舟..硫酸盐干湿循环作用下煤矸石喷射混凝土劣化机理[J].硅酸盐通报,2024,43(10):3686-3693,8.基金项目
国家自然科学基金(52178251,62276207) （52178251,62276207）
陕西省秦创原"科学家+工程师"队伍建设项目(2023KXJ-242) （2023KXJ-242）
陕西省教育厅科学研究计划项目(23JY041) （23JY041）
陕西省教育厅产业化项目(23JC047) （23JC047）
陕西省科技厅重点研发计划-技术创新引导专项(2023GXLH-049) （2023GXLH-049）
西安市级增材制造核心技术攻关项目(23ZDCYJSGG029-2022) （23ZDCYJSGG029-2022）
陕西高校青年创新团队(2023-2026) （2023-2026）
