环境温度对沥青混合料性能影响的研究进展

Research on Influence of Ambient Temperature on Properties of Asphalt Mixtures

摘要:

作为路面的主要结构形式之一，沥青路面被广泛应用于国内外的道路建设中。由于材料组成的影响，沥青混合料对环境温度较为敏感。在沥青路面服役环境中，环境温度变化会导致沥青混合料性能的劣化，较早的出现各种病害，影响其耐久性，造成服役寿命下降。基于此，介绍常用的蠕变、剪切、车辙试验等沥青混合料高温性能测试方法，半圆弯曲试验、三点弯曲试验等低温性能测试方法，间接拉伸试验、四点弯曲试验等疲劳性能测试方法；重点分析了不同环境温度下沥青混合料高温、低温及疲劳性能的劣化特征及规律，总结了沥青混合料高温、低温及疲劳性能的最新研究进展；最后展望未来的发展方向，以期为沥青混合料的设计和应用提供技术支撑。

Abstract:

As one of the main structural forms of pavement, the asphalt pavement is widely used in the road construction at home and abroad. Due to the influence of material composition, the asphalt mixture is more sensitive to the ambient temperature. In the service environment of asphalt pavement, the change of ambient temperature will lead to the deterioration of the asphalt mixture properties and various diseases will occur early, which will affect its durability and cause the reduction of its service life. Based on this, the test methods of high temperature performance of asphalt mixture such as creep, shear and rutting test, the low-temperature performance testing methods of half-circle bending test and three-point bending test, and the fatigue performance testing methods of indirect tensile test and four-point bending test are introduced. The degradation characteristics and rules of high temperature, low temperature and fatigue properties of asphalt mixture under different ambient temperatures are analyzed. The latest research progress on high temperature, low temperature and fatigue properties of asphalt mixture is summarized. Finally, the future development orientation is prospected in order to provide the support for the design and application of asphalt mixture.