01596181

Component

https://doi.org/10.3141/2506-06

The use of recycled asphalt shingles (RAS) as a partial replacement for aggregates and petroleum-based virgin asphalt cement binder has gained interest; however, many state departments of transportation are still cautious about adopting high RAS content in their designs because of construction concerns and durability issues. The objective of this study was to conduct a comprehensive laboratory evaluation of asphalt mixtures containing RAS with and without recycling agents. The study used postconsumer waste shingles. Five 12.5-mm asphalt mixtures were designed to meet Superpave® design criteria, with three of the five mixtures containing no recycling agents and two mixtures containing recycling agents (a naphthenic and a vegetable oil). Laboratory testing evaluated rutting performance, moisture susceptibility, fracture resistance, and the critical cracking temperature of laboratory produced mixtures. The testing used the Hamburg loaded-wheel tester, the semicircular bending test, and the thermal stress restrained specimen test in addition to the dynamic modulus test. The results from the experimental program indicated that asphalt mixtures containing 5% RAS without recycling agents had similar performance compared with the control asphalt mixture containing no RAS at high, intermediate, and low temperatures. The inclusion of RAS with and without recycling agents showed an improvement in rutting performance with no adverse effect on moisture sensitivity compared with the control mixture without RAS. However, because the use of recycling agents increased the recycled binder ratio, the intermediate- and low-temperature performances of the mixture were adversely affected.

01596058

15-4737

English

pp 54–61

2015

Transportation Research Record: Journal of the Transportation Research Board

9780309369299

Print

Figures (5) ; References (13) ; Tables (5)

Asphalt additives; Asphalt mixtures; Chemical agents; Laboratory studies; Recycled materials; Shingles

Highways; Materials; Pavements

TRIS, TRB, ATRI

Dec 30 2014 1:34PM

• Biomodification of Rubberized Asphalt and Its High Temperature Properties
• Characterization of Adhesion and Healing at the Interface Between Asphalt Binders and Aggregate Using Atomic Force Microscopy
• Correlating Laboratory Test Methodologies to Measure Skid Resistance of Pavement Surfaces
• Development of an Analytical Model to Predict the Field Permeability of Asphalt Pavements
• Effect of Mineral Fillers on the Oxidative Aging of Asphalt Binders: Laboratory Study with Mastics
• Effect of Water Content on Binder Foaming Characteristics and Foamed Mixture Properties
• Fatigue and Rutting Evaluation of Laboratory-Produced Asphalt Mixtures Containing Reclaimed Asphalt Pavement
• Fatigue Performance Evaluation of Rubberized Porous European Mixture by Simplified Viscoelastic Continuum Damage Model
• Improved Methodology to Evaluate Fracture Properties of Warm-Mix Asphalt Using Overlay Test
• Laboratory Tests and Numerical Simulations of Mixing Superheated Virgin Aggregate with Reclaimed Asphalt Pavement Materials
• Nanomechanical Evaluation of Vapor-Conditioned and Unconditioned Asphalt
• Numerically Supported Experimental Determination of the Behavior of the Interlayer Bond in Asphalt Pavement
• Precision of the Hamburg Wheel-Track Test
• Quantitative Characterization of Binder Blending: How Much Recycled Binder Is Mobilized During Mixing?
• Use of the Resilient Modulus Test to Characterize Asphalt Mixtures with Recycled Materials and Recycling Agents