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Open AccessArticle

Performance Analysis of Asphalt Mixtures Modified with Ground Tire Rubber Modifiers and Recycled Materials

1
Department of Civil and Environmental Engineering, University of Missouri, Columbia, MO 65211, USA
2
Department of Industrial and Enterprise Systems Engineering, University of Illinois, Urbana-Champaign, IL 61801, USA
*
Author to whom correspondence should be addressed.
Sustainability 2019, 11(6), 1792; https://doi.org/10.3390/su11061792
Received: 20 February 2019 / Revised: 10 March 2019 / Accepted: 21 March 2019 / Published: 25 March 2019
(This article belongs to the Special Issue Sustainable Infrastructure Materials and Systems)
The usage of Ground Tire Rubber (GTR) in asphalt pavements has gained renewed interest due to its potential sustainability, economic, and performance benefits. This study focuses on asphalt mixtures designed with three different rubber modifier products including (1) a terminal-blend GTR, (2) a dry-process, chemically processed rubber product, and (3) a terminal-blend rubber-polymer hybrid product. The modifications were incorporated into Illinois Tollway’s approved Stone Matrix Asphalt (SMA) designs using (1) a base binder (PG 58-28), (2) a softer binder (PG 46-34), and (3) a softer binder with higher recycled content. Disk-shaped Compact Tension (DC(T)) test, Hamburg Wheel Tracking Test (HWTT) and Acoustic Emission (AE) tests were performed to characterize the mixtures. The fracture energy for most mixtures met the stringent criteria of 690 J/m2 and the rut depths measured were less than 6 mm at 20,000 wheel passes. A Hamburg-DC(T) plot suggests that higher amounts of RAP/RAS (RAP: Reclaimed Asphalt Pavement; RAS: Reusable Asphalt Shingles) can be successfully used if a suitably soft base binder is employed. View Full-Text
Keywords: ground tire rubber (GTR); disk-shaped compact tension (DC(T)); rubber modifier; reclaimed asphalt pavement (RAP); reusable asphalt shingles (RAS); pavement ground tire rubber (GTR); disk-shaped compact tension (DC(T)); rubber modifier; reclaimed asphalt pavement (RAP); reusable asphalt shingles (RAS); pavement
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MDPI and ACS Style

Rath, P.; Love, J.E.; Buttlar, W.G.; Reis, H. Performance Analysis of Asphalt Mixtures Modified with Ground Tire Rubber Modifiers and Recycled Materials. Sustainability 2019, 11, 1792. https://doi.org/10.3390/su11061792

AMA Style

Rath P, Love JE, Buttlar WG, Reis H. Performance Analysis of Asphalt Mixtures Modified with Ground Tire Rubber Modifiers and Recycled Materials. Sustainability. 2019; 11(6):1792. https://doi.org/10.3390/su11061792

Chicago/Turabian Style

Rath, Punyaslok; Love, Joshua E.; Buttlar, William G.; Reis, Henrique. 2019. "Performance Analysis of Asphalt Mixtures Modified with Ground Tire Rubber Modifiers and Recycled Materials" Sustainability 11, no. 6: 1792. https://doi.org/10.3390/su11061792

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