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针对目前沥青混合料受动水压力影响机理和动水压力模拟研究存在的不足,在设计以气压方式激发动水压力试验装置的基础上,对沥青混合料在60℃高温、定向动水冲刷模式下的沥青膜剥落规律进行试验研究。结果表明:沥青混合料在定向动水压力作用下,沥青胶浆粘度降低,对集料的粘结力降低,导致试件剪切破坏;沥青层底部存水导致受动水压力作用时间变长,在车轮荷载的补充压实作用下可能发生沥青向上迁移的现象。
Aiming at the shortcomings of the current research on the influence mechanism of hydrodynamic pressure and the hydrodynamic pressure simulation of bituminous mixture, on the basis of design of pneumatic test device to stimulate hydrodynamic pressure, the influence of asphalt mixture on hot water at 60 ℃, Under the asphalt film flaking rule of experimental study. The results show that under the action of directional dynamic water pressure, the viscosity of asphalt mortar decreases and the adhesive force to the aggregate decreases, leading to shear failure of the specimens; , The phenomenon of upward migration of asphalt may occur under the compaction of the wheel load.