Mechanisms in Healing of Bitumen and the Impact of Normal Force

Mechanisms in Healing of Bitumen and the Impact of Normal Force

Leegwater, G.A. (TU Delft Pavement Engineering)
Scarpas, Athanasios (TU Delft Pavement Engineering)
Erkens, S. (TU Delft Pavement Engineering)

Chabot, A. (editor)
Buttlar, W.G. (editor)
Dave, E.V. (editor)
Petit, C. (editor)
Tebaldi, G. (editor)

2016

Damage in pavements is known to reduce over time when the material is left to rest, this phenomenon is known as healing. It has been shown that healing is an important influence factor in pavement performance. However, an accepted method to assess the healing capability of a pavement is currently not available. Healing of cracks is assumed to be the sum of two processes, cracked surfaces coming into contact (wetting) and strength gain of surfaces in contact (intrinsic healing). The paper describes influencing parameters of these two processes. The healing potential of bitumen is assessed using a novel test method. In this method two pieces of bitumen are brought together and left to heal under controlled condi-tions. After healing the amount of healing is assessed by testing the specimens us-ing a direct tensile test. From the results it can be seen that normal force has a sig-nificant impact on the observed healing, indicating that the process of two surfaces coming into contact (wetting) has a significant impact on healing behavior of the bitumen.

Healing test
Bitumen
Intrinsic healing
Wetting

http://resolver.tudelft.nl/uuid:4a174fd6-670a-4722-95ab-c21ba8eec3bb

https://doi.org/10.1007/978-94-024-0867-6_35

978-94-024-0866-9

8th RILEM International Conference on Mechanisms of Cracking and Debonding in Pavements

8th RILEM International Conference on Mechanisms of Cracking and Debonding in Pavements, 2016-06-07 → 2016-06-09, Nantes, France

RILEM Bookseries, 13

Institutional Repository

conference paper

© 2016 G.A. Leegwater, Athanasios Scarpas, S. Erkens