Effect of Aggregate Properties on Long-Term Skid Resistance of Asphalt Mixture
Publication: Journal of Materials in Civil Engineering
Volume 33, Issue 1
Abstract
This research aimed to evaluate the impact of aggregate characteristics on the skid resistance of pavement. Firstly, the mineral composition, wear-resistance property, angularity, and texture of five types of aggregates were determined. Then, the accelerated-wear test for asphalt mixtures was carried out by self-developed accelerated-wear equipment in the laboratory. Then, the degree of influence of each parameter was evaluated through gray correlation degree and linear regression methods. It was found that the mineral composition of different aggregate types is obviously diverse, and the mineral composition has an impact on the wear-resistance property of aggregate. With the increase of wear cycles, the textural depth of the asphalt mixture decreased, but the British Pendulum Number (BPN) increased slightly in the initial stage of wear. Based on the results, it was suggested that to improve the skid resistance of asphalt mixtures, the abrasion resistance index and shape index of aggregate should be taken into consideration. In addition, improving the aggregate processing technology to improve the angularity index (GA) and sphericity (SP) and to reduce flattening rate () will have great practical significance for improving the skid resistance of asphalt pavement.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
This research was financially supported by National Natural Science Foundation of China (No. 51878075), Guangxi Natural Science Foundation (No. 2018GXNSFAA294146), Guangxi Major Science and Technology Project (Gui Ke AA18242032), and Guangxi Major Science and Technology Project (Gui Ke AB19245019).
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Information & Authors
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Published In
Journal of Materials in Civil Engineering
Volume 33 • Issue 1 • January 2021
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Apr 16, 2020
Accepted: Jul 6, 2020
Published online: Oct 24, 2020
Published in print: Jan 1, 2021
Discussion open until: Mar 24, 2021
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