Print Email Facebook Twitter Direct Tensile Test to Assess Healing in Asphalt Title Direct Tensile Test to Assess Healing in Asphalt Author Leegwater, G.A. (TU Delft Pavement Engineering) Scarpas, Athanasios (TU Delft Pavement Engineering) Erkens, S. (TU Delft Pavement Engineering) Date 2016 Abstract Asphalt concrete has the advantageous ability to heal. During restperiods, damage present In the material is restored to a certain extent.Healing of the material can be observed in iis regaining of strengthand stiffness after rest periods. In this paper, a new test method is presented.It was developed to increase the understanding of the healingphenomenon. The test method focused on asphalt as it v/ss assumed tobe the driver of the healing performance. The test method assessedthe heaUng performance of asphalt In stiffness and strength by testingthe bond strength In tensile mode of two pieces of asphalt that wereassembled under controlled temperature and stress conditions. Withthe test method, healing tests ^yere performed on one type of binder;the load level during healing and the healing tune were varied. The tesiresults showed that after a short healing time of only 6 min, a significantamount of healing could be detected. That finding indicates the importanceof adhesion between two crack surfaces v/hen the healing capacityis assessed. It v/as also found that the maximum tensile stress reached aplateau value after 24 h of healing; the finding indicates thatfull healingcan be realized in short time periods for pure, unaged, soft binders. Itv/as also shov/n that the load level perpendicular to the damage duringheaUng had a significant effect on the observed healing. Subject Bond strength (MaterialsAsphaltStiffnesstension testsTest proceduresHealing To reference this document use: http://resolver.tudelft.nl/uuid:109485d6-3fa2-4a74-8a33-90d52381f9f4 DOI https://doi.org/10.3141/2574-14 ISSN 0361-1981 Source Transportation Research Record (2574), 124-130 Event Transportation Research Board 95th annual meeting, 2016-01-10 → 2016-01-14, Washington, United States Part of collection Institutional Repository Document type journal article Rights © 2016 G.A. Leegwater, Athanasios Scarpas, S. Erkens Files PDF 2016_2_Direct_Tensile_Tes ... 016_2_.pdf 861.07 KB Close viewer /islandora/object/uuid:109485d6-3fa2-4a74-8a33-90d52381f9f4/datastream/OBJ/view