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<p>Discrepancies between laboratory-based predictions and field performance of asphalt mixes in terms of fatigue life can be reduced by taking into account the self-healing characteristics of asphalt in experimental protocols. In this study, an unmodified binder and a polymer-modified binder are used to compare their relative performance in terms of healing both in the presence and absence of a warm mix additive (WMA). During the test, rest periods of varied durations (10, 15, and 30 minutes) are introduced at 25%, 50%, and 75% of damage levels prior to reaching failure to examine their influence on the further evolution of damage. The addition of the WMA resulted in an improved healing index of both unmodified and modified binders at all the damage levels pre-failure. The results suggest the potential of WMA additives to enhance the healing of bituminous mixes, in addition to their established benefits in lowering temperatures.</p>

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An investigation on the healing potential of warm mix asphalt binders using linear amplitude sweep test

  • 期刊论文

  • 发表日期：

    2025年5月20日

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  • Sunny Kumar,
  • Deepa Sasidharan,
  • Atanu Behera,
  • Bharath Gottumukkala,
  • Rakesh Kumar

摘要

Discrepancies between laboratory-based predictions and field performance of asphalt mixes in terms of fatigue life can be reduced by taking into account the self-healing characteristics of asphalt in experimental protocols. In this study, an unmodified binder and a polymer-modified binder are used to compare their relative performance in terms of healing both in the presence and absence of a warm mix additive (WMA). During the test, rest periods of varied durations (10, 15, and 30 minutes) are introduced at 25%, 50%, and 75% of damage levels prior to reaching failure to examine their influence on the further evolution of damage. The addition of the WMA resulted in an improved healing index of both unmodified and modified binders at all the damage levels pre-failure. The results suggest the potential of WMA additives to enhance the healing of bituminous mixes, in addition to their established benefits in lowering temperatures.