Incorporating additives into asphalt binders or mixtures to mitigate the adverse effects of aging can improve the resistance to fatigue cracking and, thus, prolong asphalt pavement service life. This study aimed to assess five candidate anti-aging technologies through a comprehensive laboratory testing matrix that can reduce the aging susceptibility and enhance the cracking resistance of asphalt mixtures. Two base binders were modified with the additives. The resultant asphalt mixtures were tested at three aging conditions, including short-term and long-term oven aging and the National Center for Asphalt Technology (NCAT) Accelerated Weathering System. The study assessed the impact of additive technology on cracking performance through dynamic modulus and cyclic fatigue testing. The results were utilized to calculate the Sapp and Glover–Rowe mix ( G-Rm) indexes to gauge the cracking resistances and aging susceptibilities of the asphalt mixtures. A 20-year pavement structural analysis was conducted using FlexPAVE™ 1.1 software to determine the evolution of each mixture’s percent cracking damage. The results consistently indicated that additives 3, 4, and 5 increased the cracking resistance of asphalt mixtures for both base binders. FlexPAVE™ 1.1 pavement analysis also showed that all tested additives reduced the percent damage over 20 years, except for additive 4 with one of the base binders. Implementing and developing promising additives to counteract aging effects is vital for creating more sustainable and durable asphalt pavements.


    Access

    Download

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Innovative Rheological Modifiers for Decreasing the Cracking Susceptibility of Asphalt Mixtures


    Additional title:

    Transportation Research Record: Journal of the Transportation Research Board


    Contributors:


    Publication date :

    2024-08-08




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Relationship between Rheological Indices and Cracking Performance of Virgin, Recycled, and Rejuvenated Asphalt Binders and Mixtures

    Kaseer, Fawaz / Martin, Amy Epps / Arámbula-Mercado, Edith | Transportation Research Record | 2021


    Mixture-based rheological evaluation tool for cracking in asphalt pavements

    Ogbo, Chibuike / Kaseer, Fawaz / Oshone, Mirkat et al. | British Library Online Contents | 2019


    Characterizing Cracking of Asphalt Mixtures with Fiber Reinforcement

    Gibson, Nelson / Li, Xinjun | Transportation Research Record | 2019


    Low Temperature Cracking Resistance of Asphalt Concrete Mixtures

    Jung, D. / Vinson, T. S. | British Library Online Contents | 1993