Evaluation of fracture parameters of bond in stone masonry units bound with fibre reinforced mortar
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Bibliographic record
Abstract
This paper evaluates the fracture parameters of bond in stone masonry units bound with plain and fibre reinforced mortar. Sandstone blocks were joined together with a modern Type S mortar conforming to CSA A 179-04. A companion series was examined employing a hydraulic lime mortar used in the repointing of historical masonry. Based on a previous study, polypropylene micro fibres were incorporated at up to 0.5% by volume to achieve superior crack growth resistance. The study reports relevant fracture parameters including the critical stress intensity factor, the critical crack length and the critical crack mouth opening displacements. The masonry units were subjected to quasi static flexure as per ASTM and dynamic bending via a drop weight impact machine which generated stress rates up to 10 7 kPa/s. The results show an improvement in the bond strength, but varied fracture performance between the Type S and hydraulic lime mortars, as a result of fibre reinforcement.
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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 | 0.001 | 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) | 0.002 | 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