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

Punyaslok Rath, Joshua E. Love, William G. Buttlar and Henrique Reis
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Punyaslok Rath: Department of Civil and Environmental Engineering, University of Missouri, Columbia, MO 65211, USA
Joshua E. Love: Department of Industrial and Enterprise Systems Engineering, University of Illinois, Urbana-Champaign, IL 61801, USA
William G. Buttlar: Department of Civil and Environmental Engineering, University of Missouri, Columbia, MO 65211, USA
Henrique Reis: Department of Industrial and Enterprise Systems Engineering, University of Illinois, Urbana-Champaign, IL 61801, USA

Sustainability, 2019, vol. 11, issue 6, 1-20

Abstract: 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/m 2 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.

Keywords: ground tire rubber (GTR); disk-shaped compact tension (DC(T)); rubber modifier; reclaimed asphalt pavement (RAP); reusable asphalt shingles (RAS); pavement (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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