Evaluation of Aggregate Crushing Tests and Their Correlation with Superpave Mix Design Properties
Publication: Journal of Materials in Civil Engineering
Volume 32, Issue 6
Abstract
This paper evaluated alternative test methods to determine the crushing potential of aggregates and documented the influence of aggregate characteristics on the engineering properties of asphalt mixes. Six aggregates sampled from different sources were subjected to various aggregate tests, including the Los Angeles abrasion, micro-Deval, soundness magnesium, and acid insoluble tests. A Superpave mix with a 12.5-mm (1/2-in.) nominal maximum aggregate size gradation was produced with each aggregate source using the same PG 64-22 asphalt binder. The mixtures were produced to investigate the impact of aggregate properties on their volumetric properties as well as the tensile strength from the indirect tension tests and rutting potential from the Hamburg wheel tracking tests. Correlation analyses among the measured parameters identified the aggregate crushing value as a promising alternative test method to quantify the crushing potential of aggregates and to adjust the gradation accordingly to produce mixtures with optimized volumetric properties.
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Data Availability Statement
Some or all data, models, or code generated or used during the study are available from the corresponding author by request, including performance tests raw data.
Acknowledgments
Gratitude is extended to the Federal Highway Administration (FHWA) and the Texas Department of Transportation for the help and support provided. The authors greatly appreciate the guidance and technical assistance provided by Ryan Barborak and Robert Lee, the present and former managers of the TxDOT Flexible Pavement Branch. The authors extend their gratitude to the research staff and asphalt research group from the Center for Transportation Infrastructure Systems (CTIS) for their help and assistance during this study.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 32 • Issue 6 • June 2020
Copyright
©2020 American Society of Civil Engineers.
History
Received: Jun 17, 2019
Accepted: Oct 28, 2019
Published online: Mar 27, 2020
Published in print: Jun 1, 2020
Discussion open until: Aug 27, 2020
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