Prediction of the intrinsic damage during bituminous mixes fatigue tests

Title: Prediction of the intrinsic damage during bituminous mixes fatigue tests
Author(s): D. Bodin, C. de La Roche, J. M. Piau, G. Pijaudier-Cabot
Paper category : conference
Book title: Sixth International RILEM Symposium on Performance Testing and Evaluation of Bituminous Materials
Editor(s): M. N. Partl
Print-ISBN: 2-912143-35-7
e-ISBN: 2912143772
Publisher: RILEM Publications SARL
Publication year: 2003
Pages: 380 - 386
Total Pages: 7
Nb references: 8
Language: English

Abstract: The cyclic character of pavement loads induces material micro-structural changes inside the pavement layers leading to macro-cracks. Fatigue resistance of asphalt concrete is assessed using different constant strain or stress amplitude cyclic laboratory tests. Two major phenomenological aspects cause the stiffness decrease rate: microcracking which provides mechanical damage and viscoelastic thermal dissipation which affects the binder stiffness. A uncoupled thermomechanical and damage approach is presented for the interpretation of laboratory fatigue tests and applied here to displacement controlled tests. This fatigue interpretation allows a more intrinsic damage evaluation corrected from the thermal effects that do not occur in the field.

Online publication: 2003-03-02
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143772.047