Bibliographic record
Abstract
The coupled effects of ambient temperature and mixing time on the slump loss of self-compacting concrete (SCC) are critical for hot weather concreting. Ordinary Portland cement concrete mixtures were made with a water/cement ratio of 0·38 and incorporating polycarboxylate-, melamine sulfonate-, or naphthalene sulfonate-based superplasticisers. The concrete mixtures were continuously agitated for up to 110 min using a low-shear rate mixer under controlled temperature ranging from 22 to 45°C. The effects of such a prolonged mixing scheme under various temperatures on the slump loss and compressive strength of concrete at ages of 12 h, 1, 3, 7 and 28 days were investigated. The results show that concrete can undergo substantial slump loss when subjected to prolonged mixing at high temperature. Knowledge of the superplasticiser effects at high temperature and prolonged mixing time is critical to achieve adequate rheological properties of concrete in hot weather. The results also indicate that the compressive strength of concrete mixtures is dependent on temperature, mixing time and superplasticiser type. The early-age strength of concrete at high temperature may be about four-fold that at moderate temperature. On the other hand, the long-term compressive strength of concrete subjected to early-age high temperature can decrease by more than 10%.
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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 | 0.000 |
| 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".