Experimental study of hydromechanical behaviour of a compacted lateritic sandy lean clay
Bibliographic record
Abstract
Lateritic clay is widely distributed in tropical areas and used extensively for foundation materials. Compared to other soils, it is rich in iron and aluminum oxides (sesquioxides), which enhance the formation of soil aggregates. The principal objective of this study is to investigate the hydromechanical behaviour of a lateritic sandy lean clay. All specimens were compacted at the same condition and then wetted to a predefined suction (0, 50, 150 kPa). Suction-controlled isotropic compression and shear tests were carried out. Moreover, soil microstructures at various suctions were determined using the mercury intrusion porosimetry (MIP) and scanning electron microscope (SEM) techniques. The compressibility of the lateritic clay decreased by about 50% as suction decreased from 150 to 0 kPa. This is mainly because as the suction decreased to 0 kPa, the sizes of interaggregate pores decreased, as revealed by MIP data. During shearing, the critical state friction angle appeared to be independent of suction. The contribution of suction to the apparent cohesion is unexpectedly low, likely because the interaggregate pores have a low degree of saturation and the contribution of the water meniscus on shear strength is very low.
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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".