The mercury intrusion test was conducted with an automatic mercury porosimeter, and the pore characteristics of five types of aggregates commonly used in road construction were analyzed using mercury injection data obtained under different pressures. The amount of asphalt that infiltrated the aggregate pores under an asphalt–aggregate ratio of 4% was experimentally and numerically determined, and the influence of aggregate pore characteristics on the amount of asphalt that infiltrated the aggregate pores was analyzed using gray relative theory. Aggregate aperture ranged from approximately 0.01 to 334 μm, and the aggregate pores can be classified into large, medium, small, and micropores according to their volume distribution. The volume distribution decreased in the following order: large > medium > small pores; the micropore volume was nearly negligible. Among the factors of pore surface area, pore volume, porosity, and average pore size, the extent of influence on absorption capacity of asphalt is porosity > pore volume > pore surface area > average pore diameter.

中文翻译：

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灰色关联分析揭示的集料表面孔隙率及其与沥青吸收的关系

采用自动压汞仪进行压汞试验，利用不同压力下的压汞数据分析了道路施工常用的五种骨料的孔隙特征。通过实验和数值方法确定了在沥青-集料比为 4% 时沥青渗入集料孔隙的量，并采用灰色相对理论分析了集料孔隙特征对渗入集料孔隙的沥青量的影响。骨料孔径范围约为0.01～334 μm，骨料孔隙按体积分布可分为大孔、中孔、小孔和微孔。体积分布按以下顺序递减：大孔>中孔>小孔；微孔体积几乎可以忽略不计。在孔表面积、孔容、孔隙率和平均孔径等因素中，对沥青吸附能力的影响程度为孔隙率>孔容>孔表面积>平均孔径。