The Mechanistic differences between alkali silica and alkali carbonate reactions as studied by X-ray diffraction
Bibliographic record
Abstract
The differences in the expansive mechanisms of both Alkali Silica (ASR) and Alkali Carbonate Reactive (ACR) rock samples were examined using X-ray diffraction techniques. Reactive aggregates were ground and placed in 1 molar NaOH solution at both 80 and 20°C. Multiple measurements were taken over a 150 day time period. Volume and composition changes were noted. Composition changes were tracked using quantitative Rietveld analysis methods. The observation of a new semi-crystalline tobermorite-like phase common to both ASR and ACR samples raises the possibility of similar mechanisms at work in both processes. However the tobermorite-like phase is less abundant in the alkali silica samples. This new phase only occurred at 80°C, hence the possibility of a temperature induced mechanistic changes is debated.
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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 | 0.001 | 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".