华东交通大学学报2023，Vol.40Issue(6)：32-38,7.
水泥-水玻璃改良粉质黏土渗透性能与微观机理研究
Study on Permeability and Microscopic Mechanism of Cement-Wa-ter Glass Improved Silty Clay
摘要
Abstract
In this paper,the effects of cement content,water glass content and curing age on the impermeability performance of silty clay were discussed by indoor penetration test,scanning electron microscopy(SEM)and X-ray diffraction(XRD)test on the typical silty clay in Nanchang.The results showed that the permeability coeffi-cient of improved silty clay decreased at a rate of 3 orders of magnitude higher than that of 14～28 d at a curing age of 7～14 d.With the continuous increase of cement content,the permeability coefficient of improved silty clay decreased and the decline rate gradually decreased.The increase of water glass content can significantly reduce the permeability coefficient of improved silty clay.Cement-water glass can synergistically improve the imperme-ability of silty clay,and the optimal ratio of 24%cement + 6%water glass has an optimal dosage.Compared with the improved silty clay with single cement,the incorporation of water glass does not change the main phase composition of the hydration product,but promotes the hydration reaction,and increases the yield of hydration products such as C-S-H gel and C-A-S-H calcium vanadite,and greatly reduced the number of pores and frac-tures between soil particles.关键词
粉质黏土/水泥-水玻璃/微观机理/渗透Key words
silty clay/cement-water glass/microscopic mechanism/infiltration分类
建筑与水利引用本文复制引用
胡扬扬,刘银芳,苏德垠,郭易盟,朱碧堂,胡椿华..水泥-水玻璃改良粉质黏土渗透性能与微观机理研究[J].华东交通大学学报,2023,40(6):32-38,7.基金项目
国家自然科学基金面上项目(4197229) （4197229）
国家自然科学基金委重点国际合作研究项目(5202010500) （5202010500）
