长沙理工大学学报（自然科学版）2013，Vol.10Issue(2)：8-14,7.
高温湿热地区沥青混合料抗水损害性能评价
Evaluation of asphalt mixture resistance to water damage in high temperature hot and humid regions
摘要
Abstract
This paper analyzes the influence of immersion with high temperature and gradational segregation on the tensile strength of asphalt mixture by tests in laboratory.The method of four points bending test in immersion is presented to evaluate the asphalt mixture's resistance to water damage at high temperature and humid regions due to the deficiency of retained Marshall stability index and the retained strength of freeze-thaw splitting test.It is mainly discussed the influence of the level of different porosities and gradational segregation on splitting tensile strength and four points bending strength of asphalt mixture.The results showed that the porosity develops toward two extremes as the level of segregation of asphalt mixture increases,and the error of porosity is about 10％ as the segregations of coarse aggregate and fine aggregate seriously.The influence of segregation of coarse aggregate is more than the segregation of fine aggregate on splitting tensile strength and bending strength.The porosity should be controlled strictly beyond 4.5 ％ ～ 10 ％ to ensure that asphalt mixture's ability is enough to resist water damage.And the four points bending strength in immersion with high temperature can be used to evaluate water damage resistibility of asphalt mixtures more preferably.关键词
沥青混合料/水损害/级配离析/四点弯曲强度/劈裂强度Key words
asphalt mixture/ water damage/ gradational / four points bending strength/splitting tensile strength分类
交通工程引用本文复制引用
周志刚,蒋腾腾,姜旺恒..高温湿热地区沥青混合料抗水损害性能评价[J].长沙理工大学学报（自然科学版）,2013,10(2):8-14,7.基金项目
国家自然科学基金资助项目(51178065) （51178065）
海南省交通厅科技资助项目(JT20090898002) （JT20090898002）
