矿产综合利用2024，Vol.45Issue(2)：41-45,5.DOI:10.3969/j.issn.1000-6532.2024.02.007
磷矿渣改性水泥基充填料的渗透性能及其微观结构
Permeability and Microstructure of Phosphate Slag Modified Cement-Based Filling Material
摘要
Abstract
This is an article in the field of ceramics and composites.In order to improve the impermeability and microstructure of the impermeable wall materials,four kinds of calcium-based bentonite modified and filling material with different dosages were prepared under the action of alkali excitation reaction.The modified and filling material samples in the curing process were tested by flexible wall penetration(FWPT),nuclear magnetic resonance(NMR)scanning and electron microscope scanning(SEM).The results show that the permeability coefficient of filling material samples decreases first and then increases with the increase of bentonite content,and reaches a minimum value when the content of bentonite is 4％.The relaxation time(T2)distribution curves of the filled material specimens after curing from 1 to 28 d were all bimodal,with more than 80％of the peaks representing small pores,and the percentage of the peaks representing large pores decreasing with the increase of curing time.According to SEM images,it can be seen that a certain amount of calcium bentonite can promote the occurrence of hydration reaction,and the porosity of the material is significantly reduced.At 4％phosphate slag,the cementitious filler has the best compactness and better impermeability and strength.Accordingly,it can be determined that the better dosage of phosphate slag modified cementitious filler is 4％.关键词
陶瓷及复合材料/充填料/磷矿渣/强度/渗透系数/微观结构Key words
Ceramics and composites/Filling material/Phosphate slag/Strength/Permeability coefficient/Microstructure分类
矿业与冶金引用本文复制引用
付洋,韩亮,陈泰霖..磷矿渣改性水泥基充填料的渗透性能及其微观结构[J].矿产综合利用,2024,45(2):41-45,5.基金项目
四川省科技厅资助项目(K20190056) （K20190056）
江苏省重点研发项目(212400410184) （212400410184）
