Performance of rice husk ash blended cement concretes subjected to sulfate environment
Bibliographic record
Abstract
This work assessed the performance of rice husk ash (RHA)-based ASTM type I and type V (low tricalcium aluminate (C 3 A)) blended cement concrete mixtures subjected to a mixed magnesium–sodium sulfate environment for an immersion period up to 48 months. The concrete mixtures comprised a combination of two Portland cements (type I and type V) and two RHA-blended cements with two water-to-binder ratios of 0·35 and 0·45. In addition to fresh and strength properties, X-ray diffraction, differential scanning calorimetry, mercury intrusion porosimetry and rapid chloride permeability tests were conducted on all concrete mixtures to determine phase composition, pozzolanic activity, porosity and chloride ion resistance. Deterioration of concrete due to mixed sulfate attack and corrosion of reinforcing steel were evaluated by assessing concrete weight loss and measuring corrosion potentials and polarisation resistance at periodic intervals throughout the immersion period of 48 months. Plain (type I/V) cement concretes performed better in terms of deterioration and corrosion resistance than RHA-based type I/V blended cement concrete mixtures in a mixed sulfate environment.
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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 | 0.003 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.001 |
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".