基于沥青特性和矿料级配改善沥青混凝土高温稳定性分析

Analysis of improving high temperature stability of asphalt concrete based on asphalt characteristics and mineral gradation

探讨了沥青性能和矿料级配对沥青混凝土高温稳定性能的影响。通过不同软化点、不同针入度的沥青或掺天然岩沥青拌制沥青混合料高温性能试验,并使用最佳理想级配曲线优化矿料级配,对沥青混合料高温稳定性进行分析。分析表明,采用级配偏粗,软化点高、低针入度的沥青或掺天然岩沥青的密级配沥青混合料,能够显著提高动稳定度。

This article explores the influence of asphalt performance and mineral grade on the high-temperature stability performance of asphalt concrete.By conducting high-temperature performance tests on asphalt mixtures with different softening points and penetration points or mixed with natural rock asphalt,and using the optimal ideal gradation curve to optimize the mineral aggregate gradation,the high-temperature stability of asphalt mixtures is analyzed.Analysis shows that using asphalt with coarse grading,high softening point,and low penetration,or dense graded asphalt mixtures mixed with natural rock asphalt,can significantly improve dynamic stability.