Journal
EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
Volume 13, Issue 9, Pages 1095-1107Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/19648189.2009.9693176
Keywords
thermal sensitivity; linear viscoelasticity; linear behaviour; Time-Temperature Superposition Principle (TTSP); master curve; shift factor; non linear domain; thermo-viscoplastic model
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In the small strain domain (amplitudes below about 10(-4)), when considering ID approach, the bituminous mixtures behaviour is linear viscoelastic, with a great thermal sensitivity and respects the Time-Temperature Superposition Principle (TTSP). In this paper, the generalisation of the TTSP is proposed for 3D. Measurements of complex Young's modulus (E*) and complex Poisson's ratio (v*) during cyclic loadings are presented. v* is also shown dependent on frequency and temperature and respects the TTSP. A key result is that a very close shift factor is obtained for E* and v*. In a second step, experiments in the non linear domain (considering strains up to some percents) allow to propose a generalisation in the non linear domain of the TTSP. This work is associated with modeling development using the general thermo-viscoplastic model DBN (Di Benedetto & Neifar).
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