铁道科学与工程学报Issue(6)：68-71,4.
贵州地区石灰改良膨胀土无侧限抗压强度的试验研究
Experiment study on unconfined compressive strength of lime stabilized expansive soil in Guizhou province
摘要
Abstract
An experimental investigation was undertaken to study the effects of lime stabilized soil on the strength behavior of expansive soil.In the present investigation,a series of laboratory tests (unconfined compression tests)were conducted on lime stabilized expansive soil which was from Guizhou province.Lime contents,ran-ging from 3%,5%,7%,9%,to 1 1%of dry weight of expansive soil were used in the stabilized soil.In addi-tion,the stabilized soil was compressed at compacting factor of 0.90,0.92,and 0.95.Tests on expansive soils were conducted at different curing periods i.e.,7,14,and 28 days.The test results reveal that unconfined compressive strength (USC)increases significantly with the increase of the compacting factor and the curing peri-od.Also,the results show that USC of the treated expansive soil tend to increase with increasing lime content up to 9%,beyond which it slightly decreases.Grey correlation analysis which was about the factors of USC indi-cates that compacting factor is the most important factor affecting USC of the sample,followed by the curing peri-od,and lime content enhanced USC the least.The brittle failure occurs for all the samples of the lime treated ex-pansive soil,when the stress-strain relationship presents strain softening characteristics.The research results are of reference value to design and construction for other similar projects.关键词
膨胀土/石灰改良土/无侧限抗压强度/灰色关联度分析/脆性破坏Key words
expansive soil/lime-treated soil/USC/grey correlation analysis/brittle failure分类
建筑与水利引用本文复制引用
高晓波,阮波,田晓涛,吕有缘,李思嘉,汤彬彬..贵州地区石灰改良膨胀土无侧限抗压强度的试验研究[J].铁道科学与工程学报,2014,(6):68-71,4.基金项目
中南大学实验室开放专项基金资助项目 （）
