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冰川冻土 ›› 2013, Vol. 35 ›› Issue (5): 1202-1208.doi: 10.7522/j.issn.1000-0240.2013.0135

• 寒区科学与技术 • 上一篇    下一篇

氯盐对沥青混凝土冻融劈裂抗拉强度影响的试验与分析

马芹永, 吴金荣, 秦凯   

  1. 安徽理工大学 土木建筑学院, 安徽 淮南 232001
  • 收稿日期:2013-02-10 修回日期:2013-06-24 出版日期:2013-10-25 发布日期:2013-11-07
  • 作者简介:马芹永(1964-),男,安徽宿州人,教授,2005年在北京科技大学获博士学位,现主要从事冻土力学与工程方面的研究.E-mail:qmqm2001@126.com
  • 基金资助:
    安徽省高校省级自然科学研究项目(KJ2013A082)资助

Tests and Analyses of the Influence of Chlorine Salt on Freezing-Thawing Splitting Tensile Strength of Asphalt Concrete

MA Qin-yong, WU Jin-rong, QIN Kai   

  1. School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan Anhui 232001, China
  • Received:2013-02-10 Revised:2013-06-24 Online:2013-10-25 Published:2013-11-07
  • Contact: 吴金荣,E-mail:wujr2000@163.com E-mail:wujr2000@163.com

摘要: 由于昼夜温度交替变化, 盐渍土地区的沥青混凝土路面易发生冻融破坏, 影响沥青路面的使用性能.采用冻融劈裂试验, 以冻融劈裂抗拉强度和冻融腐蚀因子评价沥青混凝土在氯盐侵蚀下强度的变化规律. 结果表明: 经过氯盐侵蚀冻融循环后, 沥青混凝土的冻融劈裂抗拉强度明显下降;而且随着冻融次数的增加, 其冻融劈裂抗拉强度下降的幅度增大.冻融腐蚀因子也呈现同样的变化规律, 氯盐浓度越高, 对沥青混凝土冻融劈裂抗拉强度和冻融腐蚀因子影响也越大. 试验研究结果为盐分地区沥青路面结构设计提供科学依据.

关键词: 沥青混凝土, 冻融劈裂, 氯盐, 腐蚀因子

Abstract: Freezing-thawing damage to asphalt concrete pavement in saline soil areas is more frequent due to diurnal temperature variation, which affect pavement performance directly. So splitting tensile test for asphalt concrete in freezing-thawing condition is conducted. The splitting tensile strength and freezing-thawing corrosion factor are adopted to evaluate the strength variation of asphalt concrete under chlorine salt action. The results show that the splitting tensile strength of asphalt concrete decreases rapidly after chlorine salt erosion with several freeze-thaw cycles, and the decreasing amplitude increases with the times of freezing-thawing cycles. Freezing-thawingcorrosion factor shows the same changing tendency. Moreover, the higher the concentration of chlorine salt, the larger the influence on the splitting tensile strength and freezing-thawingcorrosion factor for asphalt concrete. The results would provide the scientific foundation for structural design of asphalt concrete in salt areas.

Key words: asphalt concrete, freezing-thawing splitting, chlorine salt, erosion factor

中图分类号: 

  • P642.14