Study on Mechanical Properties of Concrete at Different Ages under Freeze-Thaw Cycles in Plateau
Bibliographic record
Abstract
The purpose of this study is to explore the mechanical properties of concrete at different curing ages after freeze-thaw cycles in most areas of the plateau where freeze-thaw cycles exist. By comparing the compressive strength and splitting strength of concrete at different curing ages after different freeze-thaw cycles, the influence of curing age changes on the mechanical properties of concrete after freeze-thaw damage was analysed. The results show that the compressive strength and splitting strength of concrete can be significantly increased by increasing the curing days of concrete with the same number of freeze-thaw cycles, and sufficient curing age has a significant effect on reducing the influence of freeze-thaw cycles. Under the condition of the same curing days, with the increase of the number of freeze-thaw cycles, the compressive strength of concrete will first increase and strengthen at 50 cycles, and then start to weaken continuously. The splitting strength will continue to decrease with the increase of freeze-thaw cycles.
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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) | 0.000 | 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) | 0.001 | 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".