Fine aggregate interference on the performance of asphalt mixtures

Abstract

Marshall compaction tests of 24 gradations were carried out to study the fine aggregate (2.36 mm and 1.18 mm) interference tendency of volume parameters. An interference coefficient was proposed to analyze the interference rule of different parameters. Then, split test (15°C) was used to measure the tensile property of different mixtures, a comparative analysis of the flow number test (55°C) and rutting test (60°C) was conducted to evaluate the high temperature pavement performance, and the low-temperature property was distinguished by the strain energy density of bending test (0°C, −20°C). The results reveal that the interference effect of fine aggregates (2.36 mm and 1.18 mm) is proportional to the size of an interference particle and the content of coarse aggregates, and is inversely proportional to the nominal maximum aggregate size.