Quantification of different effects occurring during fatigue tests on bituminous mixtures |
| |
| Authors: | Cong Viet Phan Hervé Di Benedetto Cédric Sauzéat Josselin Dayde Simon Pouget |
| |
| Affiliation: | 1. Univ Lyon, école Nationale des TPE, LTDS (CNRS UMR 5513), Vaulx‐en‐Velin Cedex, France;2. LHOIST Southern Europe Carrières et Chaux Balthazard et Cotte, Sassenage, France;3. Research and Innovation Department, EIFFAGE Infrastructures, Corbas Cedex, France |
| |
| Abstract: | Quantification of different effects (nonlinearity, heating, thixotropy, and fatigue) occurring during fatigue tests on bituminous mixtures is presented in this paper. A focus is given on the nonlinearity phenomenon. Continuous fatigue tests and a test with specific protocol (called fatigue tests to estimate biasing effects) were performed in tension/compression mode on cylindrical samples of the same material. The analysis of results reveals that reversible effects (nonlinearity, heating, and thixotropy) are important (more than 90% decrease at 100,000 cycles for a strain amplitude of 100 μm/m at 10 Hz) and cannot be ignored when interpreting classical fatigue tests. The nonlinearity effects respect the time‐temperature superposition principle, and they are more pronounced at “high” temperature (at the same frequency). Direction of nonlinearity curve in the Cole‐Cole axes is shown to be independent of temperature and frequency for the considered range. |
| |
| Keywords: | biasing effects bituminous mixtures fatigue test heating nonlinearity thixotropy |
|
|
