Thermomechanical Coupling in Bituminous Mixtures Considered as Bonded Granular Media
Bibliographic record
Abstract
Bituminous mixtures can be seen as granular media composed by particles (larger aggregates) and a viscoelastic bonding phase (a mix of smaller aggregates and bitumen, called bituminous mastic). During fatigue experiments, a decrease in norm of complex modulus, increases in phase angle and in temperature are observed. This stiffness change is commonly misinterpreted as damage, supposedly irreversible. Literature proposed an explanation for that initial modulus decrease based on local thermal effects (local self-heating, creating a thermomechanical coupling), but considering no thermal diffusion. This work investigates thermal diffusion in the mastic phase. A non-uniform (local) heat production in the mastic is considered with simplified geometry (monodisperse rigid particles in a mastic phase). The local effects of temperature on stiffness were analyzed for the first 100 cycles of loading at 10 Hz (10 s). Results showed that the calculated modulus decrease is not sufficient to explain the changes during fatigue tests observed experimentally. That suggests the existence of another phenomenon (consistent with the definition of thixotropy) responsible for the reversible modulus decrease in bituminous mixtures.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".