硅酸盐通报2025，Vol.44Issue(12)：4325-4331,7.DOI:10.16552/j.cnki.issn1001-1625.2025.0615
Na2SO4对瓦斯封孔复合水泥性能的影响
Influence of Na2SO4 on Performance of Gas Sealing Composite Cement
摘要
Abstract
This paper investigated the effects of Na2SO4 on setting time,slump flow,hydration heat,expansion rate,compressive strength,and micromechanical properties of gas sealing composite cement(composed of ordinary Portland cement and sulphoaluminate cement).The results show that Na2SO4 accelerated the setting and hydration processes of composite cement,and its setting acceleration effect is positively correlated with the dosage(0.5％～2.0％,mass fraction).Meanwhile,both the expansion rate and compressive strength of composite cement increase with the increase in Na2SO4 dosage.By incorporating 0.5％～2.0％Na2SO4,the increase rates of compressive strength of the composite cement are 23.3％～100.0％(1d),10.4％～30.8％(3d),6.8％～23.9％(7 d),and 11.0％～29.9％(28 d).Micromechanical property analysis indicates that the hydration of composite cement is more complete,with a more uniform distribution of elastic modulus and a notable increase in the formation of gel-like products with low elastic modulus.These findings provide a technical basis for performance regulation of high-performance gas sealing materials.关键词
瓦斯封孔材料/复合水泥/凝结时间/微观力学性质/抗压强度Key words
gas sealing material/composite cement/setting time/micromechanical property/compressive strength分类
建筑与水利引用本文复制引用
ZHU Jiafeng,LIANG Xueyan,YANG Wenwang..Na2SO4对瓦斯封孔复合水泥性能的影响[J].硅酸盐通报,2025,44(12):4325-4331,7.基金项目
国家自然科学基金委员会国家重大科研仪器研制项目(部门推荐)(52227901) （部门推荐）
