This study aims to investigate promising mitigation strategies for improving the cracking performance of high recycled binder ratio (RBR) asphalt mixtures. Moisture-resistant aggregates that do not require anti-stripping agents, reclaimed asphalt pavement (RAP), and recycled asphalt shingles (RAS) were sampled for this study from sources in two climatic zones, south and north. The south-moisture-resistant (SR) mixtures were designed with 0.16 and 0.29 RBRs with RAP, while the north-moisture-resistant (NR) mixtures included 0.21 and 0.37 RBRs with RAP and 0.44 RBR with RAP/RAS. The mitigation strategies evaluated included a softer binder, a different binder source with higher ΔTc, a recycling agent (RA), reduced recycled binder availability (RBA), polymer-modified asphalt (PMA), and hybrid approaches including softer binder + RBA and PMA+RBA. The Indirect Tensile Asphalt Cracking Test (IDEAL-CT) and Disc-Shaped Compact Tension (DCT) test were conducted to capture intermediate-temperature and low-temperature cracking performance, respectively. In addition to the cracking tolerance index (CTindex), an IDEAL-CT interaction diagram analysis was added to further understanding the effect of mixture variables on cracking performance. The findings suggest that while no single strategy works for all RBR mixtures tested, RA, RBA, softer binder, or their combinations yield adequate cracking performance depending on factors including RAP binder stiffness and quantity, RA dose, climatic zone, and RBA.


    Access

    Download

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Establishing Strategies to Improve Cracking Resistance of High Recycled Binder Ratio Asphalt Mixtures


    Additional title:

    Transportation Research Record: Journal of the Transportation Research Board




    Publication date :

    2024-05-05




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Durability Evaluation of High Recycled Binder Ratio Asphalt Mixtures

    Montañez, Juliana / Martin, Amy Epps / Arámbula-Mercado, Edith et al. | Transportation Research Record | 2025


    Performance Characterization of Asphalt Mixtures at High Asphalt Binder Replacement with Recycled Asphalt Shingles

    Ozer, Hasan / Al-Qadi, Imad L. / Kanaan, Ahmad I. et al. | Transportation Research Record | 2013


    Establishing use of asphalt binder cracking tests for prevention of pavement cracking

    Tabatabaee, Hassan A. / Bahia, Hussain U. | British Library Online Contents | 2014



    Low-Temperature Thermal Cracking of Asphalt Binder by Asphalt Binder Cracking Device

    Kim, Sang-Soo / Wysong, Zachary / Kovach, Jonathan | Transportation Research Record | 2006