【作者】 张宜洛；

【Author】 Zhang Yiluo;Key Laboratory of Highway Engineering in Special Region of Ministry of Education,Chang’an university;

【机构】 长安大学特殊地区公路工程教育部重点实验室；

【摘要】 复杂的气候条件和严苛的交通条件会要求沥青路面具有更高的抗车辙性能。本文以温度、轮压和行车速度等为因素条件,通过室内试验进行各因素对沥青混合料动稳定度的影响研究。研究结果认为,沥青混合料的动稳定度均随温度升高、轮压的增大、车速的降低而减小;当温度超过70℃时,SMA混合料还保持着较高的动稳定度,AC混合料的车辙变形量会急剧增大;SMA的高温抗车辙性能对轮压的敏感性比基质沥青AC小56.5%,比改性沥青AC小42.7%;行车速度的变化对SMA的抗车辙性能影响很小,而对基质沥青混合料影响很大;基于沥青混合料动稳定度等效的原则,提出了各因素的等效关系式,建立了温度、荷载、车速等多因素的动稳定度标准值的计算模型。更多还原

【Abstract】 Asphalt pavement requires higher anti-rutting performance under complex climate conditions and harsh traffic conditions. This paper studied influence on dynamic stability of asphalt mixture for various factors such as temperature, wheel pressure and driving speed conditions by the indoor test. The results indicate that dynamic stability of asphalt mixture decreases along with the increase of temperature, wheel pressure, speed reduction; When the temperature over 70 ℃, the SMA mixture also maintained a high degree of stability, AC rut deformation will increase sharply; SMA anti-rutting performance of wheel pressure sensitivity 56.5% smaller thanordinary asphalt AC, AC 42.7% smaller than the modified asphalt; Driving speed changes have little impact on rutting resistance of SMA, and a great influence on the ordinary asphalt mixture; Based on equivalent principle, the dynamic stability of asphalt mixture was put forward the equivalent relation of various factors, established the multiple factors such as temperature, load, speed, the dynamic stability of the calculation of standard model.更多还原