Shear Strength of Steel Fiber-Reinforced Recycled Aggregates Concrete Deep Beams
Why this work is in the frame
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Bibliographic record
Abstract
The effectiveness of steel fibers to improve the shear behavior of recycled aggregates concrete deep beams is investigated experimentally in this paper. Three large-scale concrete deep beams with a shear span-to-depth ratio (a/h) of 1.6 were tested. Two beams had a 100% recycled concrete aggregates (RCA) replacement ratio whereas one beam was made with natural aggregates (NA) to act as a benchmark. One of the RCA beams included steel fibers at a volume fraction of 1%. The use of a 100% RCA significantly impaired the beam stiffness, reduced the cracking load by 25%, and decreased the shear strength by 5%. The use of steel fibers in a RCA beam delayed initiation of shear cracks, improved the beam stiffness, and fully restored the original shear capacity.
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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) | 0.000 | 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 it