Reactivity assessment of calcined illite, kaolinite, and montmorillonite in R3 mixtures
Why this work is in the frame
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Bibliographic record
Abstract
This study evaluates the pozzolanic reactivity of calcined illite, kaolinite, and montmorillonite using the more recently standardized rapid, relevant, and reliable (R 3 ) test methods as specified in ASTM C1897. The reactions involving calcite and the calcined clay minerals were examined by comparing the cumulative heat release in the R 3 mixtures with and without calcite, and by analyzing the hydrated R 3 mixtures using X-ray diffraction (XRD), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM). The results indicate that the R 3 reactivity of calcined clay minerals exhibits a positive linear relationship with the number of hydroxyl groups present in their original mineral structures. Strong correlations were observed among cumulative heat release, bound water content, and dehydroxylation mass loss of clay minerals. This suggests that the dehydroxylation mass loss can be used as an indicator for the initial screening of potential clay sources for use as supplementary cementitious materials (SCMs). However, the optimal calcination temperatures for illite and montmorillonite do not fall within their dehydroxylation temperature ranges. While calcite has a limited impact on the cumulative heat release, it facilitates the formation of monocarbonate (C 4 A C ¯ H 11 ) and enhances its uniform distribution in the calcined kaolinite R 3 mixture. In comparison, the reactions involving calcite with calcined illite and montmorillonite in their R 3 mixtures are limited.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| 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 it