岩土工程学报2026，Vol.48Issue(z2)：58-62,5.DOI:10.11779/CJGE2026S20017
碱激发矿粉改良压实黏土的强度特性及防渗阻气性能研究
Mechanical properties,hydraulic and gas barrier performance of alkali-activated slag-amended compacted clay
摘要
Abstract
To enhance the performance of compacted clay as the cover barrier material,alkali-activated slags together with or without bentonite are used as amendment materials to amend the compacted clays.The alkali materials include quicklime,calcium carbide residue,and magnesium oxide.Unconfined compression tests and flexible-wall hydraulic conductivity and rigid-wall gas permeability tests are conducted to evaluate the mechanical properties,hydraulic and gas barrier performance of the amended compacted clays.Test results show that unconfined compressive strength(qu)increased by 5～12 times after 28 days of curing and it increased by 6.0%～56.7%after 60 days of curing as compared to 28 days of curing.All amended compacted clays exhibit acceptably low hydraulic conductivity(kw)below 10-9 m/s,and calcium carbide residue-activated slag amendment reduces kw by over one order of magnitude.All alkali-activated slag amendment lowers gas permeability(kg)by over one order of magnitude.Calcium carbide residue-activated slag amendment yields the lowest kw and kg.关键词
压实黏土/碱激发/防渗/阻气/电石渣Key words
compacted clay barrier/alkali activated/hydraulic conductivity/gas permeability/calcium carbide residue分类
建筑与水利引用本文复制引用
车驰,王敏,李颖臻,姜哲元,陈勇战,汪军,杜延军..碱激发矿粉改良压实黏土的强度特性及防渗阻气性能研究[J].岩土工程学报,2026,48(z2):58-62,5.基金项目
国家自然科学基金项目(42477178) （42477178）
江苏省重点研发计划项目(BE2022830) （BE2022830）
海南省科技专项基金(ZDYF2024SHFZ141) （ZDYF2024SHFZ141）
