Self-healing capsules in early-age cementitious composites: A deterministic-probabilistic multi-scale approach
Bibliographic record
Abstract
• Inherent variability affects capsule failure and effective properties of matrix. • Failure probability changes greatly with evolving early age concrete properties. • Reliability index for optimization of capsule design. • Neglecting drying creep effect overestimates probability of capsule rupture. Capsules for healing early-age concrete cracks should possess multi-functional properties to ensure shell rupture and release of healing agents rather than debonding from the cementitious matrix when intercepting a crack. A deterministic-probabilistic multi-scale model is developed to determine the probability of capsule rupture versus interfacial debonding induced by early age volume change. A micromechanical model along with a probabilistic model are employed for determining the maximum tensile stresses in capsule shell, radial tensile stresses on the capsule-matrix interface, and the corresponding probability index of capsule rupture and debonding. The matrix is modeled as an equivalent homogeneous medium with effective properties determined from a homogenization scheme. The influence of crack is accounted for implicitly. The model results are qualitatively in agreement with results reported in the literature.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), 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".