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Erschienen in:
2022 | OriginalPaper | Buchkapitel
Experimental Investigation on the Effect of Microwave Heating Technique on the Healing Characteristics of Bituminous Concrete Mixtures
verfasst von : Satya Lakshmi Aparna Noojilla, Kusam Sudhakar Reddy
Erschienen in: Proceedings of the Fifth International Conference of Transportation Research Group of India
Verlag: Springer Nature Singapore
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Abstract
Fatigue cracking is one of the major failures of bituminous pavements. Interestingly, bitumen has an intrinsic property of self-healing the fatigue damage which majorly depends on temperature of the mixture and resting time given to the mixture under no application of load. Researchers explored the application of heat to bituminous mixture for improving its healing ability. Present study investigates the healing characteristics of dense graded bituminous mixes heated under microwaves. Mixtures prepared using the combination of bituminous concrete gradation and VG40 bitumen were heated at different power levels and healing studies with different rest periods were performed. Heating studies indicated the microwave absorbing ability of aggregates and the existence of a thermal gradient of 0.5 °C/mm across the thickness of the specimen. Indirect tensile strength (ITS)-based healing tests implied an increase in the healing ability of mixtures with an increase in the rest period.