Elasticity control through overburden and adsorption competition in porous media
Bibliographic record
Abstract
Adsorption-induced deformation is common in porous rocks, but its role in stressed porous rocks remains unclear. These changes in elasticity have critical implications for geological stability, particularly in regions experiencing alternating droughts and wet conditions. This study investigates elastic deformation in fine-grained sandstone under cyclic loading over 34 days, with humidity increased to near dew point. Adsorption-induced weakening decreases from over 40% to less than 10% as overburden pressure rises from 1 MPa to levels below crack initiation. Similar trends are observed in fine-grained granite. A multi-scale model combining contact mechanics and nanopore adsorption explains these results, highlighting stress competition between adsorption effects and overburden pressure. Adsorption weakening becomes negligible beyond burial depths of 200 meters in sandstone and 700 meters in granite. These findings improve understanding of near-surface geological hazards, such as exfoliation, landslides, and cliff failure, under extreme climatic events. 
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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 | 0.001 |
| 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".