Shear Strengthening of Concrete Deep Beams with Geopolymer-Based Fabric-Reinforced Matrix Composites
Bibliographic record
Abstract
Test results of three large-scale reinforced concrete (RC) deep beam specimens with a shear span-to-depth ratio (a/h) of 1.6 are reported in this paper. One control beam was not strengthened whereas two beams were strengthened in shear using one layer of unidirectional carbon fabric-reinforced matrix (CFRM) composites. A geopolymeric matrix was used in the CFRM of one of the strengthened specimens to examine its potential use as a sustainable alternative to a commercial cementitious mortar. The geopolymeric matrix was a mixture of ground granulated blast furnace slag and fly ash activated by an alkaline solution consisting of sodium silicate and sodium hydroxide. The control beam failed shortly after initiation of a diagonal splitting shear crack in the shear span. The strengthened beams failed at a higher load in a shear-compression or diagonal tension mode of failure. Shear strengthening with CFRM composites resulted in a shear strength gain of 95% when a cementitious mortar was used as a matrix. The use of CFRM with a geopolymeric matrix was effective in improving the shear response but to a lesser extent. The gain in shear capacity caused by CFRM with a geopolymeric matrix was 77%.
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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".