Validation of time temperature superposition principle for high modulus asphalt concrete in the linear viscoelastic and fatigue domains |
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| Authors: | Mohamed Mounir Boussabnia Daniel Perraton Hervé Di Benedetto Sebastien Lamothe Marc Proteau |
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| Affiliation: | 1. École de technologie supérieure (ÉTS), Construction Engineering Department, Montréal, Canada;2. École nationale des travaux publics de l'État (ENTPE), University of Lyon, LTDS, Lyon, France;3. Centre technique des Amériques (CTA), Brossard, Canada |
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| Abstract: | Validation of time–temperature superposition principle (TTSP) in the fatigue domain for a high modulus asphalt concrete (HMAC) is presented in this paper. All tests were performed in tension-compression under strain control mode. First, TTSP was validated in the linear viscoelastic domain. Then, fatigue tests were performed under three loading conditions, 9.2°C and 5 Hz, 11.0°C and 10 Hz and 12.9°C and 20 Hz, which are equivalent regarding TTSP. Two fatigue protocols were adopted: continuous fatigue test (FT) and fatigue test with rest period (FTRP). For FT, three samples were tested at 180μm/m for each loading condition whereas for FTRP, one sample was tested at 100 μm/m. The data were analysed by comparing the dynamic modulus evolution as a function of time or the fatigue life duration. The results showed that HMAC with fatigue damage remains thermorheologically simple (i.e., respects the TTSP) in the studied temperatures range. |
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| Keywords: | fatigue fatigue test with rest periods polymer modified asphalt tension-compression test time–temperature superposition principle |
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