Abstract
Long term aging, or the oxidation and subsequent stiffening of hot mix asphalt (HMA) mixtures, is a contributing cause of the pavement’s performance loss. Laboratory testing protocols simulating field aging characteristics, such as SHRP-A-417, have been developed to test asphalt mixtures in order to evaluate their aging resistance in the field.
However, the SHRP-A-417 protocol requires some specialized equipment to age open graded mixtures. This study focused on evaluating alternative aging methods for Asphalt Rubber Friction Course (ARFC) mixtures. Compacted laboratory specimens (cores) as well as loose mixtures (pan) were aged under similar temperatures and time durations. Aging effects were assessed using the E* dynamic modulus test and the modular aging ratio developed in this study. Specimen geometry, air voids, and compaction parameters were also examined before and after the aging process to evaluate the effectiveness of the aging procedures. The core aging procedure proved to be a better alternative to the pan aging method; pan aging was ineffective in simulating aging characteristics.
Rheological and Engineering Properties of Rubberized Asphalt Concrete Mixtures Containing Warm Mix Asphalt Additive 
Research on The Terminal Blend Rubberized Asphalt With High-Volume of Rubber Crumbs and its Gap Graded Mixture 
Comparison of Laboratory and Field Aging Properties of Asphalt-Rubber and Other Binders in Arizona 
Effect of Crumb Rubber on the Aging of Asphalt Binders 
Performance of Recycled Rubber Modified Binders in Warm Mix Asphalt Mixtures 
Studies on Adhesive Performance of Waste Crumb Rubber Modified Asphalt Mixtures 
Reflection Cracking and Permanent Deformation of Overlays with Recycled Tire Rubber and Polymer Modifiers Under HVS Loading 
Pavement Monitoring Results After Seven Years of Using Crumb Rubber Modified Asphalt in Brazil 
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Research findings on the use of Rubberized Warm-Mix Asphalt in California