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冰川冻土 ›› 2015, Vol. 37 ›› Issue (2): 422-427.doi: 10.7522/j.issn.1000-0240.2015.0047

• 寒区科学与技术 • 上一篇    下一篇

温度与侵蚀对沥青混凝土冻融疲劳寿命的影响

吴金荣, 马芹永, 王文娟   

  1. 安徽理工大学 土木建筑学院, 安徽 淮南 232001
  • 收稿日期:2014-10-18 修回日期:2015-01-20 出版日期:2015-04-25 发布日期:2015-06-06
  • 通讯作者: 马芹永, E-mail: qmqm2001@126.com. E-mail:qmqm2001@126.com
  • 作者简介:吴金荣(1977-), 女, 吉林洮南人, 副教授, 2007年毕业于安徽理工大学, 现为博士研究生, 主要从事沥青路面材料的研究. E-mail: wujr2000@163.com
  • 基金资助:

    安徽省高校省级自然科学研究重点项目(KJ2013A082)资助

Influence of temperature and corrosion on freezing-thawing fatigue life of asphalt concrete

WU Jinrong, MA Qinyong, WANG Wenjuan   

  1. School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, China
  • Received:2014-10-18 Revised:2015-01-20 Online:2015-04-25 Published:2015-06-06

摘要:

为了提高盐渍土地区沥青路面的疲劳性能, 对SBS改性沥青混凝土进行了清水与饱和氯盐溶液的冻融劈裂疲劳试验, 研究了温度与氯盐侵蚀共同作用下, 沥青混凝土冻融疲劳寿命衰减规律. 结果表明: 温度与氯盐侵蚀是影响沥青混凝土冻融疲劳寿命的重要因素. 当冻融次数相同时, 沥青混凝土冻融疲劳寿命随冻融温度降低而不断减小; 当冻融温度相同时, 其冻融疲劳寿命随冻融次数增加而不断减小. 饱和氯盐溶液中沥青混凝土冻融疲劳寿命明显低于清水条件, 说明氯盐能够加速沥青混凝土冻融疲劳寿命衰减, 冻融温度越低, 盐冻破坏越严重. 通过对试验数据回归分析可知, 沥青混凝土冻融疲劳寿命与冻融循环次数之间具有较好的相关性, 可以利用两者之间的指数函数关系来预测沥青混凝土冻融疲劳寿命.

关键词: 劈裂疲劳试验, 沥青混凝土, 冻融疲劳寿命, 温度, 氯盐侵蚀

Abstract:

In order to improve the fatigue performance of asphalt pavement in saline soil areas, the freezing-thawing split fatigue tests of SBS asphalt concrete immersed in water or saturated chlorine solution were carried out. The attenuation laws of freezing-thawing fatigue life of asphalt concrete were studied under the combined action of temperature and chlorine salt corrosion. The results indicate that temperature and chlorine salt corrosion are important factors which affect the freezing-thawing fatigue life of asphalt concrete. When the freezing-thawing cycles are the same, the freezing-thawing fatigue life of asphalt concrete will decrease with freezing-thawing temperature decreasing. When freezing-thawing temperature is the same, the freezing-thawing fatigue life of asphalt concrete will decrease with the freezing-thawing cycles. The freezing-thawing fatigue life of asphalt concrete in saturated chlorine salt solution is obviously lower than that in water, which shows that chlorine salt can accelerate the fatigue failure of asphalt concrete; the lower the freezing-thawing temperature is, the more serious frost damage is. Regression analysis of the test data found that there is a good exponential relation between freezing-thawing fatigue life and freezing-thawing cycles in asphalt concrete, which can be used to predict the freezing-thawing fatigue life of asphalt concrete.

Key words: split fatigue test, asphalt concrete, freezing-thawing fatigue life, temperature, chlorine salt corrosion

中图分类号: 

  • U414.1+8