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采用伺服液压多功能材料试验系统(UTM-25)测量了2种沥青路面结构多种病害的芯样在不同温度和荷载作用频率下的间接拉伸回弹模量。结果表明,外部环境和所承受的行车荷载对回弹模量影响较大;罩面层与原有的上面层相比,其回弹模量的变化幅度更大;横向裂缝较为严重的区域,其罩面层试件回弹模量均小于同位置原沥青上面层试件回弹模量;间接拉伸回弹模量实验可作为评价沥青路面材料路用性能的一种可靠方法。
The indirect tensile modulus of elasticity of core samples of two kinds of asphalt pavement structures with different temperature and load frequency was measured by using servo hydraulic multi-functional material testing system (UTM-25). The results show that the external environment and the bearing load exert a great influence on the springback modulus. The overlay modulus of the overlay changes more greatly than that of the original overlay, and the area where the transverse crack is more serious, The rebound modulus of the overlay specimens are all less than that of the original specimen on the same position. The indirect tensile modulus test can be used as a reliable method to evaluate the road performance of asphalt pavement materials.