矿料级配对沥青混合料路用性能影响的试验分析

以典型的AC—13沥青混合料为基础，通过系统室内对比试验，对5组由粗到细级配的沥青混合料的基本物理性质、高温稳定性、低温抗裂性、水稳定性、疲劳耐久性等路用性能进行了研究。试验结果表明，级配变化对沥青混合料路用性能有直接的影响，且存在一定的规律性，总体表现为靠近规范级配中值附近其综合性能较好；不同级配类型的沥青混合料路用性能的优点表现不一样，粗级配更有利于抗高温变形的提高，细级配更有利于抗水损害、抗弯拉破坏、抗疲劳开裂等性能的提高。研究成果为沥青混合料级配选择和优化设计提供参考。

Experimental Analysis on Effect of Aggregate Gradation on Pavement Performance of Asphalt Mixture

Based on the typical AC-13 asphalt mixture, some basic physical properties and some pavement performance of asphalt mixtures, such as the high temperature stability, low-temperature crack resistance, water stability and fatigue durability, were tested according to the comparison tests included five types of asphalt mixture from coarse-graded to fine-graded. The experimental results show that the different gradations had a great impact on the pavement performance of asphalt mixtures and the median gradation had better comprehensive performance generally. And also the different gradation had different advantages, such as the coarse-graded asphalt mixture was benefit for the improvement of anti-distortion in high temperature, while the fine-graded was benefit for the improvement of anti-water damage, anti- flexural-tensile damage and anti-fatigue cracking. The research results also can be used for reference dur- ing the gradation selection and optimization design of asphalt mixtures.