损伤沥青混合料渗透性模型与水稳定性试验

发布时间：2018-08-27 10:26

【摘要】：为研究沥青路面力学损伤与水损坏的相互驱动作用对损伤沥青混合料的渗透性和水稳定性演化规律的影响,利用由SPT(简单性能试验方法)试验得到的动态模量定义了沥青混合料损伤,并考虑试件尺寸效应,通过大量试验提出了基于超声波波速的沥青混合料损伤表征方法;通过渗透试验研究了沥青混合料损伤-渗透性模型,并通过汉堡模型试验研究了损伤和不良应力状态等对沥青路面水损坏的影响。结果表明:沥青混合料渗透性与压剪损伤呈开口向上的抛物线关系,随压剪损伤先减小后增大;沥青混合料渗透性与拉伸损伤呈Lorentzian函数关系,随拉伸损伤持续增大;损伤和不良应力状态对饱水沥青路面的水损坏有很大影响,特别是在湿热环境下;在对沥青混合料渗透性和水稳定性进行评价时应考虑沥青路面损伤对水损坏的影响,以反映全寿命周期内沥青路面性能的变化,同时要重视不良应力状态对路面运营状态的不利影响。
[Abstract]:In order to study the influence of mechanical damage and water damage of asphalt pavement on the permeability and water stability evolution of damaged asphalt mixture. The damage of asphalt mixture is defined by the dynamic modulus obtained from SPT (simple performance Test method) test, and considering the size effect of the specimen, a new method of asphalt mixture damage characterization based on ultrasonic wave velocity is put forward through a large number of tests. The damage permeability model of asphalt mixture and the influence of damage and bad stress state on the water damage of asphalt pavement were studied by penetration test and Hamburg model test. The results show that the permeability of asphalt mixture has a parabola relationship with compression shear damage, which decreases first and then increases with compression shear damage, and the permeability and tensile damage of asphalt mixture show Lorentzian function relationship, and increase continuously with tensile damage. Damage and adverse stress state have great influence on water damage of saturated asphalt pavement, especially in humid and hot environment, and the influence of asphalt pavement damage on water damage should be considered when evaluating the permeability and water stability of asphalt mixture. In order to reflect the change of asphalt pavement performance in the whole life cycle, we should pay attention to the adverse influence of the bad stress state on the pavement operation state at the same time.
【作者单位】：山东大学土建与水利学院;
【基金】：国家自然科学基金项目(51279094,51078222,50708056) 山东省自然科学基金项目(ZR2011EEM012) 山东大学自主创新基金项目(2012HW003) 教育部新世纪优秀人才支持计划项目(NCET-13-0372)
【分类号】：U414

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