Investigation of Mechanical Properties of Short- and Long-Term Aged Asphaltite Modified Asphalt Mixtures
Publication: Journal of Materials in Civil Engineering
Volume 25, Issue 5
Abstract
In this study, the effects of asphaltite and long-term aging (LTA) on the mechanical properties of hot-mix asphalt were investigated. The asphaltite entrained as filler at five different proportions into the hot-mix asphalt samples, and the obtained results were compared against the control mixtures. The pure and asphaltite-containing compacted mixtures were exposed to LTA in an oven. Marshall stability, resistance to moisture-induced damage, and resistance to crack propagation tests in accordance with the principles of elastic-plastic fracture and linear-elastic fracture mechanics were carried out on the mixtures. It was determined that the optimal proportion of asphaltite usage as filler with respect to volumetric design is 3% by weight. The test results demonstrated that asphaltite use enhances resistance against permanent deformation, moisture-induced damage, and crack propagation, especially at normal temperatures, albeit at the cost of causing the hot-mix asphalt to exhibit a more brittle behavior. The use of asphaltite would be recommended to reduce the long-term effects of aging in general, specifically on account of the results of the stability, moisture-induced damage, and fracture toughness tests.
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Acknowledgments
This study was performed under TUBİTAK (Scientific and Technological Research Council of Turkey) Research Project MAG-109M608 and FUBAP (Fırat University Scientific Research Projects Unit) Research Project FUBAP–2018. The financial contribution of TUBİTAK and FUBAP is gratefully acknowledged.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 25 • Issue 5 • May 2013
Pages: 563 - 572
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Jul 18, 2011
Accepted: Jun 25, 2012
Published online: Aug 25, 2012
Published in print: May 1, 2013
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