水资源与水工程学报2026，Vol.37Issue(1)：195-202,210,9.DOI:10.11705/j.issn.1672-643X.2026.01.22
赤泥基地聚物充填体抗压强度与离子浸出行为研究
Compressive strength and ion leaching behavior of red mud-based geopolymer backfill
摘要
Abstract
To investigate the strength characteristics of slag-and red mud-based geopolymer backfill and its ion slow-release behavior in groundwater environments,unconfined compressive strength(UCS)tests were conducted to characterize its mechanical properties.Meanwhile,long-term underground leaching environ-ments were simulated to analyze its chemical dissolution process and ion release patterns.The results show that the 28-day UCS of the specimens exhibits a nonlinear variation trend of first increasing and then decrea-sing with the rise of water-to-solid ratio,reaching a local peak of 2.55 MPa at a water-to-solid ratio of 0.38.In contrast,the UCS shows a monotonic increasing trend with the increase of calcium carbide slag(CCS)dosage,and the strength rises to 2.71 MPa when the CCS dosage reaches 20%by mass.Various multi-di-mensional water quality indicators of the static leachate,including pH,COD,TOC,TDS,UV275 and EC,all present violent fluctuations in the initial stage.With the elapse of time,the active components in the sys-tem gradually reach a dynamic dissolution-precipitation equilibrium,and the skeletal structure of the back-fill becomes stable.However,microscopic tests indicate that structural loosening and fracture have occurred inside the specimens,and the polymeric products show obvious deterioration and degradation,which reflects the adverse effect of long-term leaching on the durability of the material.The research results not only reveal the coupling mechanism of slag-and red mud-based geopolymer backfill in terms of mechanical properties and environmental response,but also provide scientific basis and technical support for the application of such materials to engineering fields,such as ecological environment protection and groundwater preservation.关键词
赤泥基地聚物/抗压性能/静态浸出/水质变化/材料耐久性Key words
red mud-based geopolymer/compressive performance/static leaching/water quality variation/material durability分类
建筑与水利引用本文复制引用
田博,王昊,樊雨欣,刘书贤,庞帅,孙增春..赤泥基地聚物充填体抗压强度与离子浸出行为研究[J].水资源与水工程学报,2026,37(1):195-202,210,9.基金项目
陕西省教育厅服务地方专项计划项目(24JE022) （24JE022）
陕西省自然科学基础研究计划项目(2024JC-YBQN-0375、2024JC-YBQN-0556) （2024JC-YBQN-0375、2024JC-YBQN-0556）
国家自然科学基金青年基金项目(42407259) （42407259）
