Self‐healing of engineered cementitious composites under reversed and sustained loading conditions
Why this work is in the frame
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Bibliographic record
Abstract
Abstract The present study investigates the effects of reversed and sustained flexural loading cycles on the repeatability of self‐healing in engineered cementitious composites (ECC). The experimental work is designed to test three cases of normal (REF), reverse (REV), and reverse‐sustained (RES) loading and three different exposure conditions of tap water, sea water, and open air. A total of 27 prism specimens (100 × 100 × 350 mm) were fabricated, and a four‐point bending test was used for flexural load application at different stages and to further measure the recovery in mechanical properties. The research is proposed to elaborate on the positive/negative impact of compression cycle on the self‐healing of cracks. Ultrasonic pulse velocity (UPV) test was carried out before and after each loading and the wave travel time was compared as an indicator of healing efficiency. To monitor crack propagation patterns and crack widths, digital image correlation (DIC) technique was used. To further analyze the mineralogy and microstructure of the healing products, X‐ray diffraction (XRD) test was conducted on two groups of tap water and sea water exposures. Concluding results proved that sea water and tap water are suitable environments for autogenous self‐healing process. Furthermore, reverse loading cycles were demonstrated to impact the self‐healing results and should be considered for repeatable self‐healing evaluations.
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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 | 0.000 | 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) | 0.007 | 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