交通运输研究2016，Vol.2Issue(3)：63-68,6.DOI:10.16503/j.cnki.2095-9931.2016.03.010
拉萨地区不同空隙率的半柔性路面材料冻融试验研究
Freezing-Thawing Test Research of Semi-Flexible Pavement Materials with Different Void Fraction in Lhasa
摘要
Abstract
In order to solve the problem that the cement concrete and asphalt concrete pavement materi⁃al were damaged by freezing-thawing action during their popularization and application in Lhasa, a re⁃search about the application of semi-flexible pavement materials with different void fraction in Lhasa was carried out. Test specimens were made by the way of pouring cement mortar into open-graded as⁃phalt mixture matrix with different void fraction. The time and temperature of freezing-thawing test were set based on the special environment of Lhasa. Then the high-temperature stability test and low-temper⁃ature crack resistance test were carried out to obtain the test data closing to the real environment. By ana⁃lyzing the test data, it was educed that:when semi-flexible pavement material was destroyed by freezing-thawing action, with the increasing of void fraction, the low-temperature crack resistance increased grad⁃ually, and the split displacement decreased gradually; meanwhile, the dynamic stability characterizing high temperature stability presented a trend that it increased first and then decreased with the increasing of void fraction, and the rate of deformation presented a trend that it decreased first and then increased. The results show that the semi-flexible pavement material with 27%void fraction and addition of elastic plastic material is beneficial for resisting the freezing-thawing damage, after that it can be generalized and applied in plateau region.关键词
半柔性路面材料/空隙率/冻融试验/拉萨/高原Key words
semi-flexible pavement material/void fraction/freezing-thawing text/Lhasa/plateau分类
交通工程引用本文复制引用
李成洋,张鹏,王文奇,田荣燕..拉萨地区不同空隙率的半柔性路面材料冻融试验研究[J].交通运输研究,2016,2(3):63-68,6.基金项目
西藏自治区大学生创新性实验训练计划项目（2014QCX033）；四川省教育厅项目（16ZB0164）；四川省道路工程省重点实验室开放研究基金资助项目 （）
