Development of a recycled polymer modified binder for use in stone mastic asphalt

Title: Development of a recycled polymer modified binder for use in stone mastic asphalt
Authors: Casey, Donnchadh
McNally, Ciaran
Gibney, Amanda
Gilchrist, M. D.
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Date: Aug-2008
Abstract: The number of commercial vehicles using Irish roads has increased considerably in recent years, leading to higher demands being placed on pavement materials and increased use of polymer modified bitumens. This has also coincided with significant changes in Governmental policy which has produced large increases in Irish recycling rates. Improved recycling levels are set to provide Ireland with a new challenge: to find potential uses for the large quantities of recycled polymer that are becoming available. Towards this end, the potential of developing a recycled polymer modified binder was investigated. The polymers most commonly recycled in Ireland were identified and sourced from industry. Fundamental bitumen tests were conducted to assess the effect of the recycled polymer and a mixing methodology developed. It was found that the addition of 4% recycled HDPE into a pen grade binder produced the most promising results, and the mixing process was then optimised with respect to mixing parameters and binder additives. A developmental recycled binder was produced and compared in performance tests to binders currently used in road construction practice. Results obtained from wheel track and fatigue tests show that although the binder does not deliver equivalent performance levels to a proprietary polymer modified binder, it does out-perform traditional binders used in stone mastic asphalt. Recommendations are offered on the further development of the recycled polymer modified binder to achieve the standards currently required.
Funding Details: Other funder
Type of material: Journal Article
Publisher: Elsevier
Copyright (published version): 2008 Elsevier B.V.
Keywords: Polymer modified binder;Recycled plastic;Road construction
Subject LCSH: Polymer asphalt
Recycled products
Roads--Design and construction
DOI: 10.1016/j.resconrec.2008.06.002
Language: en
Status of Item: Peer reviewed
Appears in Collections:Mechanical & Materials Engineering Research Collection
Critical Infrastructure Group Research Collection
Civil Engineering Research Collection

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