论文部分内容阅读
为分析再生粗集料棱角性对混合料高温性能的影响,采用动态颗粒图像分析仪测试了石灰岩、花岗岩、旧集料(花岗岩)3种集料不同粒径颗粒的形态结构,以球形度、凸形度、粗糙度3个指标定量评价集料颗粒的棱角性,分析集料棱角性的变化特征及不同掺配比例再生粗集料的棱角性与再生沥青混合料高温稳定性的相关性。结果表明:集料颗粒棱角性与其粒径大小呈线性相关,随着集料颗粒粒径的增大,其棱角性降低;旧集料与所选新集料相比,其棱角性会有一定程度降低;再生粗集料的棱角性随着旧集料掺配比例增大而减小,再生粗集料的棱角性与再生沥青混合料高温性能呈高度线性相关。
In order to analyze the influence of the angularity of recycled coarse aggregate on the high temperature performance of the mixture, the dynamic particle image analyzer was used to test the morphology of particles with different particle sizes of limestone, granite and old aggregate (granite) Convexity and roughness were evaluated quantitatively to evaluate the angularity of aggregate particles. The variation characteristics of aggregate angularity were analyzed. The correlation between the angularity of recycled aggregate with different blending ratio and the high temperature stability of recycled asphalt mixture was also analyzed. The results show that the angularity of the aggregates is linearly correlated with the size of the aggregates, and the angularity decreases with the increase of the aggregate size. The angularity of the old aggregates will be certain The degree of reclaimed coarse aggregate decreases with the increase of the blending ratio of the old aggregate, and the angularity of the recycled coarse aggregate is highly linear with the high temperature performance of the recycled asphalt mixture.