长春工程学院学报（自然科学版）2025，Vol.26Issue(1)：1-5,5.DOI:10.3969/j.issn.1009-8984.2025.01.001
冻融条件下铁尾矿渣改良路基混合料的力学特性试验研究
Experimental Study on the Mechanical Properties of Iron Tailings Improved Subgrade Mixture under Freeze-Thaw Conditions
摘要
Abstract
To investigate the quality,strength,and frost heave characteristics of iron tailings slag improved roadbed mixtures under freeze-thaw conditions,unconfined compressive strength tests and frost heave thaw settlement tests are conducted on undisturbed soil and iron tailings slag improved soil under different freeze-thaw cycles.The stress-strain characteristics,strength,frost heave thaw settlement rate,and influ-ence of quality loss of iron tailings slag improved soil and undisturbed soil are compared.The results show that as the number of freeze-thaw cycles increases,the unconfined compressive strength of the iron tailings slag mixture gradually decreases.After 10 freeze-thaw cycles,it tends to stabilize,and the gap to the undis-turbed soil also gradually decreases.Through freeze-thaw tests,it is shown that the freeze-thaw rate and thaw settlement rate of iron tailings slag improved soil are lower than those of undisturbed soil,and with the increase of freeze-thaw cycles,the freeze-thaw rate and thaw settlement rate continued to decrease,e-ventually approaching 0.It is proved that the freeze-thaw resistance of iron tailings slag improved soil has been improved compared to undisturbed soil under freeze-thaw cycles,and the freeze-thaw rate and thaw settlement rate of the iron tailings slag improved roadbed mixture with 3%(mass fraction)cement content are both less than 1%.Compared with the undisturbed soil before improvement,the improvement effect is analyzed and evaluated.关键词
冻融循环/无侧限抗压强度/应力-应变曲线/质量变化率/冻胀融沉Key words
freeze-thaw cycle/unconfined compressive strength/stress-strain curve/mass change rate/freeze-thaw settlement分类
交通运输引用本文复制引用
李长雨,王率,徐明杨,武晓伟,姜岩,刘晓铮..冻融条件下铁尾矿渣改良路基混合料的力学特性试验研究[J].长春工程学院学报（自然科学版）,2025,26(1):1-5,5.基金项目
吉林省科技发展计划项目(20210203129SF)吉林省教育厅"十三五"科学技术研究项目(JJKH20200628KJ) （20210203129SF）
