长江科学院院报2017，Vol.34Issue(9)：110-114,5.DOI:10.11988/ckyyb.20160511
冻融循环下废旧轮胎颗粒改性膨胀土无侧限抗压强度试验
Unconfined Compressive Strength Test on Expansive Soil Improved byWaste Tire Rubber Particles under Freeze-thaw Cycles
摘要
Abstract
In order to investigate the relationship among unconfined compressive strength of expansive soil improved by waste rubber particles, rubber particle ratio and freeze-thaw cycle times,we conducted unconfined compressive strength test on expansive soil samples improved by waste tire rubber particles at given water content.Results show that adding rubber particles could improve the unconfined compressive strength to some extent and reduce the stiffness.When the number of freeze-thaw cycle was the same, the unconfined compressive strength of the improved expansive soil increased and then decreased with the increasing of rubber particle ratio.In particular, unconfined compressive strength reached the maximum when rubber particle ratio was 3%.When rubber particle ratio was the same, unconfined compressive strength of the expansive soil and the influence of single freeze-thaw cycle on strength weakening both decreased with the increase of freeze-thaw cycle times.When water content was 20%,the rate of change in expansive soil size increased in general with the increase of rubber particle ratio in freeze-thaw cycles.Finally, when rubber particle ratio was low (≤7%), the size of the expansive soil shrank under freezing and expanded under thawing;while when rubber particle ratio was higher (=9%), the change was the opposite.关键词
废旧轮胎颗粒/膨胀土/冻融循环/无侧限抗压强度/尺寸变化率Key words
waste tire rubber particles/expansive soil/freeze-thaw cycle/unconfined compressive strength/rate of size change分类
建筑与水利引用本文复制引用
宗佳敏,宋迎俊,鲁洋,许雷,张雨灼..冻融循环下废旧轮胎颗粒改性膨胀土无侧限抗压强度试验[J].长江科学院院报,2017,34(9):110-114,5.基金项目
江苏省研究生科研与实践创新计划项目(SJCX17_0127) （SJCX17_0127）
