煤矿安全2025，Vol.56Issue(5)：153-158,6.DOI:10.13347/j.cnki.mkaq.20241178
煅烧时间对煤矸石基注浆材料中胶凝组分活性的影响机制
Study on the influence mechanism of calcination time on cementitious activity of coal gangue-based grouting material
摘要
Abstract
In order to improve the activity of coal gangue as a key cementitious component in grouting materials,this study investig-ated coal gangue calcined at different durations under 800 ℃.The coal gangue-based geopolymers were prepared through alkaline activation,and their compressive strength,X-ray diffraction(XRD)patterns,and Fourier transform infrared(FTIR)spectra were ana-lyzed to systematically elucidate the effect of calcination time on the gelling activity of coal gangue.The results indicated that coal gangue exhibited higher gelling activity after 2 hours of calcination but underwent a notable decline at 4 hours,followed by a gradu-al increase after 6 hours;calcination facilitated the transformation of kaolinite in coal gangue into reactive amorphous metakaolin,whereas prolonged calcination led to the conversion of metakaolin into less active mullite;additionally,the reduction of residual car-bon during calcination contributed to the gradual recovery of gelling activity.关键词
煤矸石/煅烧时间/胶凝活性/地质聚合物/注浆材料Key words
coal gangue/calcination time/cementitious activity/geopolymers/grouting material分类
矿山工程引用本文复制引用
胡晓宇,王晓东,朱世彬,武博强,张跃宏,韩乐,许晨..煅烧时间对煤矸石基注浆材料中胶凝组分活性的影响机制[J].煤矿安全,2025,56(5):153-158,6.基金项目
陕西省自然科学基础研究计划资助项目(S2022-JC-QN-2433) （S2022-JC-QN-2433）
