Abstract:To discuss the effect of interlayer interface pollution on the overall usability of asphalt pavement, the asphalt beams composited of the different mixtures with interlayer interface are used to carry out the shear strength test and four-point bending fatigue test. Taking the machine oil pollution and loess pollution as the Pollution sources, the amount of pollution is adjusted to simulate the pollution conditions possibly existing in the construction. Its interlayer shear strength and the overall fatigue life are measured in the different construction conditions. The test results show that: (1) for the sensibility of various factors influencing the interlayer shear strength, the sensibility of machine oil pollution is higher than that of loess pollution. (2) Under the same test conditions, the fatigue life of composite beams decreases significantly with the increase of the amount of pollution, and gradually stabilizes after a certain extent. (3) Under the same amount of pollution, the effect of machine oil on the interlayer bonding performance is greater than that of loess pollution. (4) According to the loss of bending stiffness modulus, when the amount of pollution reaches a certain level, the interlayer adhesion of composite beams will be lost.