Influence of Cyclic Frost Deterioration on Water Sorptivity of Microcracked Cementitious Composites
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Bibliographic record
Abstract
Engineered cementitious composites (ECCs) are relatively new construction materials characterized by strain-hardening behavior under excessive tensile loading. Unlike conventional concrete materials, which generally show failure after first tensile cracking, ECCs strain-harden upon excessive loading by creating multiple closely-spaced microcracks. Given the fact that crack widths in ECCs are at micron levels, water movement into these cracks through capillary suction requires further attention, especially under frost action. This paper therefore explores the effectiveness of frost action on water movement into microcracked ECCs. The experimental study covered the sorptivity measurements of ECC mixtures produced with mineral admixtures with different chemical compositions after exposure to cyclic freezing and thawing (F/T), in accordance with ASTM C 666, Procedure A. Air-void characteristics of ECCs were also compared. Experimental findings showed that air-void parameters are not the sole influential parameters on the durability of microcracked ECCs under frost deterioration. Instead of being negatively influenced by the severe conditioning under frost action until the end of 150 F/T cycles, sorptivity measurements of ECCs went down owing to self-healing in microcracks, depending on mixture composition. However, after 150 F/T cycles, deterioration surpassed the self-healing effect and increased sorptivity measurements.
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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) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 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