Effectiveness of CNI in slabs with a construction joint in a marine environment
Bibliographic record
Abstract
In marine concrete structures, construction joints, formed at the intersect of the end of one concrete placement and the beginning of a new placement, have been identified as vulnerable zones that may permit the intrusion of chlorides over a relatively small area of the reinforcement, thus accelerating corrosion. The present paper reports a research study to evaluate the effectiveness of calcium-nitrite corrosion inhibitor in combination with pulverised fly ash on the corrosion protection of reinforced concrete slabs manufactured with a construction joint intersecting the reinforcement at right angles and exposed to a marine environment for seven years. Electrochemical testing, chloride profiling using the scanning electron microscope/energy dispersive X-ray analyser and assessment of the damage caused by chloride-induced corrosion on the reinforcing bars, were conducted. Results showed that bars retrieved from low water/cementitious material ratio concretes containing calcium nitrite and fly ash experienced negligible corrosion damage; conversely, in specimens prepared with high water/cementitious material ratio, this combination provided a low level of protection.
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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 | 0.003 | 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".