Production and engineering application of C60 high-performance pump pebble concrete containing ultra-fine fly ash
Bibliographic record
Abstract
C60 grade high-performance pump concrete incorporating river pebbles and ultra-fine fly ash (UFA) was successfully prepared, with UFA replacing 30% of the cement, for the second-stage of construction of the Hunan Xiangtan Power Plant. Some of the properties of this pump concrete were studied using both laboratory and on-site testing. The results indicated that workability of UFA concrete was excellent. The initial slump surpassed 180 mm, and the slump loss was small. The 28 d strength of the concrete met the engineering requirement of conforming to C60 strength grade. It is shown that the resistance–chloride ion penetration of UFA pump concrete is better than that of ordinary concrete in terms of Association for Testing and Materials test method C1202-94. Dry shrinkage of concrete slightly reduced with the addition of UFA, and UFA concrete shows better crack resistance compared with ordinary concrete. The production technology of UFA pump pebble concrete is summarized based on test and engineering applications.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 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) | 0.001 | 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 source (direct Gemma or distilled Codex), 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".