采用单轴蠕变循环加卸载试验,探讨了热压式沥青混凝土路面柔性基层沥青混合料HRA20在高温、低应力状态下的黏弹塑性。试验结果表明,温度的升高将导致混合料对外荷载的黏弹塑性响应的迅速增长;但是,黏性(特别是黏弹性)变形对时间变化的敏感程度却随温度的升高反而有所下降。所以,高温主要通过应力函数来影响混合料黏滞性对温度的敏感性,促使其由黏弹塑性向塑性稳定流动过渡。 Uniaxial creep cyclic loading and unloading test was carried out to investigate the viscoelasto-plasticity of hot asphalt concrete pavement asphalt mixture HRA20 under high temperature and low stress. The experimental results show that the increase of temperature will lead to the rapid increase of the viscoelasto-plastic response of the mixture to the external load. However, the sensitivity of viscoelastic (especially viscoelastic) deformation to time change decreases with the increase of temperature . Therefore, the high temperature mainly through the stress function to affect the sensitivity of the viscosity of the mixture viscosity to promote its transition from viscoelastic to plastic and stable flow.