岩土力学2012，Vol.33Issue(9)：2619-2624,6.
考虑干湿循环路径的石灰改性红黏土路用性能试验研究
Experimental study of pavement performances of lime-treated laterite soil considering drying-wetting cycle paths
摘要
Abstract
Laterite soil is one kind of high plastic clay being very sensitive to environmental heat and moisture variation, and mixing optimal ratio of lime into laterite soil is made when construction to improve pavement performance and prolong the life span. Engineering properties of subgrade are obviously affected by soil moisture state and its drying-wetting history during excavation and exertion of the expressway. Experimental investigations on strength and deformation properties of lime-treated laterite soil and laterite soil are carried out, considering two drying-wetting paths which are exactly accordant with practices. The results indicate that: with uniformity drying-wetting cycles, lime-treated soil, internal friction angle increase a little and cohesive strength decrease with shearing strength reducing and pavement performance has not improved greatly. With directional drying-wetting cycles, lime-treated soil have less drying-shrinking cracks with unconfined compression strength and deformation resistance decreasing a little and the long-term strength and deformation performance enhanced significantly.关键词
红黏土/干湿循环路径/石灰改性土/路用性能Key words
laterite soil/ drying-wetting cycle path/ lime-treated soil/ pavement performance分类
建筑与水利引用本文复制引用
曹豪荣,李新明,樊友杰,王勇..考虑干湿循环路径的石灰改性红黏土路用性能试验研究[J].岩土力学,2012,33(9):2619-2624,6.基金项目
交通部西部交通建设科技项目(No.200631878530)资助 （No.200631878530）
湖南省交通运输厅2009年度科技进步与创新计划(No.200910) （No.200910）
湖北省自然科学基金(No.2011CDB407). （No.2011CDB407）
