柔性基层沥青路面沥青混合料优化设计研究

沥青混合料的抗疲劳性能是影响柔性基层沥青路面结构长期使用性能的重要指标之一，文章在综合分析国外柔性基层沥青路面结构使用性能、沥青混合料疲劳试验方法和疲劳特性的基础上，通过对沥青混合料的疲劳试验及不同影响因素间相关性的分析，采用综合优化的方法，建立了优化设计模型，研究提出了柔性基层沥青混合料疲劳性能与高温性能的综合优化指标。研究分析表明，5％～7％的矿粉用量能保证疲劳性能和高温稳定性均达到最佳。而3％－4．5％空隙率的沥青混合料综合性能较好。

Study on Optimum Design of Mixture for Asphalt Pavement with Flexible Base

Fatigue performance of asphalt mixture is one of the most important properties of asphalt pavement with flexible base.On the basis of the application experience of west country,flexible asphalt pavement structure's performance,asphalt mixture fatigue life and fatigue test methods are briefly reviewed in this paper.The authors analyzed the not only fatigue performance and high temperature property of asphalt mixture with the optimum design method,but also the correlative main influence factors and established the optimum design model.It is recognized that 5 to 7 percent mineral filler of asphalt mixture by mass have best ability of anti-fatigue performance and high temperature property;3 to 4.5 percent air voids of asphalt mixture has good long-term performance.