Influence of angularity and roughness of coarse aggregates on asphalt mixture performance

• Published in: Construction & building materials Vol. 200; pp. 681 - 686
• Main Authors: Kuang, Dongliang, Wang, Xueting, Jiao, Yuan, Zhang, Ben, Liu, Yanjin, Chen, Huaxin
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 10.03.2019
• Subjects: Aggregate; Asphalt mixtures; Characteristics; Interphase strength; Interphase strength; Aggregate; Characteristics; Asphalt mixtures
• ISSN: 0950-0618; 1879-0526
• DOI: 10.1016/j.conbuildmat.2018.12.176

•The interfacial strength of asphalt-aggregate was associated with mixture performance.•Relationship between the mean angularity coefficient and the dynamic stability of mixture.•Asphalt-aggregate interphase strength and pavement performance index of asphalt mixture were established. The damage of asphalt mixture occurs in asphalt-aggregate interphase. The strength was directly associated with the overall performance of mixture. In this paper, Marshall test was applied to investigate the high-temperature stability. The high-temperature stability, water stability and low-temperature performance of five types of asphalt mixtures were tested through Marshall test, and the correlation between road performance dynamic stability, freeze-thaw split strength ratio, and low-temperature flexural tensile strength and average angular coefficient of coarse aggregate was studied. Moreover, the correlations of asphalt-aggregate interphase strength to the pavement performance index of asphalt mixture were also established.