Effect of severe chloride environment on the flexural behaviour of hybrid concrete systems
Why this work is in the frame
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Bibliographic record
Abstract
This paper reports an investigation into the effect of a severe chloride environment on the flexural behaviour and microstructure of concrete composites combining normal- or high-strength concrete and ultra-high-performance fibre-reinforced concrete (UHPFRC). The normal- or high-strength concrete layers were used in the compression area while the UHPFRC, with three different fibre contents (1, 1·5 and 2%), was in tension. The goal was to measure the degradation of the bonding area and to investigate possible physical debonding under long-term exposure to a severe chloride environment. The microstructural properties of the degraded bond zone were examined by scanning electron microscopy, energy dispersive X-ray spectroscopy and backscattered electron imaging after 600 d of cycling exposure. The test results revealed that severe chloride exposure influenced the flexural capacity of the concrete composites. However, the bond between the normal- or high-strength concrete and UHPFRC layers was maintained without any distinctive degradation. In addition, an increase in the fibre volume in the UHPFRC layer significantly improved the mechanical resistance of concrete composite specimens, although higher chloride penetration depths were registered at increased fibre contents.
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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 | 0.004 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 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 it