What is it about?
Asphalt mixture is an important part of the road surface, and it directly affects the performance of the road. The aging characteristics of AC-13, AC-16 and SMA-13 SBS-modified asphalt mixtures are analyzed and evaluated by nuclear magnetic resonance technology, and it is found that aging reduced the deformation ability of asphalt mixtures. The self-healing performance of asphalt mixture can be well evaluated by calculating the cumulative dissipated energy. Through the improved flexural creep self-healing test, it is found that the self-healing performance of SMA-13 asphalt mixture is the best, and the addition of fibers can improve the adhesion between asphalt and aggregate.
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Why is it important?
We carried out a detailed analysis of the aging and self-healing properties of asphalt mixtures with different grades from a macro and mesoscopic perspective by means of nuclear magnetic resonance technology and an improved flexural creep self-healing test. Our results show that fibers can improve the adhesion of asphalt and aggregates very well. SMA-13 SBS modified asphalt mixture has the strongest anti-aging performance and self-healing ability.
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This page is a summary of: Multi-scale Evaluation of Aging and Damage-Healing Performance of Asphalt Mixtures of Various Gradations, Journal of Testing and Evaluation, January 2022, ASTM International,
DOI: 10.1520/jte20210244.
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