Laboratory Evaluation of Biobased Epoxy Asphalt Binder for Asphalt Pavement
Publication: Journal of Materials in Civil Engineering
Volume 30, Issue 7
Abstract
In recent years, concerns about the depletion of nonrenewable resources, infrastructure sustainability, and environmental impact in pavement engineering have led to substituting petroleum-based paving materials with their biobased counterparts. Research efforts have been attempted to produce asphalt from renewable bioresources. As a special modifier for asphalt, petroleum-based epoxy resin has been used in a few asphalt paving projects that require superior performance of asphalt mixtures. This paper presents an attempt to develop a biobased epoxy modifier for asphalt using an epoxidized soybean oil (ESO) and a biobased curing agent, maleic anhydride (MA). The proper proportions of ESO, MA, and a base asphalt were determined to achieve a homogenous biobased epoxy asphalt binder (BEAB) with the desired properties evaluated by a rotational viscosity test, a penetration test, and a dynamic shear rheometer test. Pavement performance–related properties of asphalt mixtures using such a BEAB were also preliminarily evaluated using a Marshall stability test. At an optimum ratio of for , the BEAB showed higher Marshall stability than a mixture containing the base asphalt. Further research, however, is still needed to evaluate the asphalt mixtures with more pavement performance–based tests and to refine the BEAB formula.
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Published In
Journal of Materials in Civil Engineering
Volume 30 • Issue 7 • July 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Sep 22, 2017
Accepted: Feb 16, 2018
Published online: May 12, 2018
Published in print: Jul 1, 2018
Discussion open until: Oct 12, 2018
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