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Illinois highway materials sustainability efforts of 2013.
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Published Date:2014-08-01
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Language:English
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[PDF-3.67 MB]
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Abstract:This report presents the sustainability efforts of the Illinois Department of Transportation (IDOT) in
recycling and reclaiming materials for use in highway construction. This report meets the requirements of
Illinois Public Act 097-0314 by documenting IDOT’s efforts to reduce the carbon footprint and achieve
cost savings through the use of recycled materials in asphalt paving projects. This report also covers the
development, construction, and initial performance after one winter of demonstration projects that used
total recycle asphalt (TRA). TRA may consist of reclaimed asphalt pavement (RAP), recycled concrete
material (RCM), steel slag, reclaimed asphalt shingles (RAS), and less than 3% new soft liquid asphalt.
No newly mined aggregate is used in the mix. The results of Hamburg wheel tracking and Semi-circular
bending (SCB) for fracture energy are presented for durability aspects of both rutting and pavement
cracking on three demonstration projects that used TRA mix. Crack surveys were performed to establish
early performance history of the TRA mixes. Included in this report is an environmental evaluation of 16
mixes including the TRA mixes used on the three demonstration projects.
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