Multiscale investigation of the interfacial bonding mechanisms of magnesium potassium phosphate cement and cement concrete
Why this work is in the frame
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Bibliographic record
Abstract
The interface bonding between magnesium potassium phosphate cement (MPC) and Portland cement concrete (PCC) is critical for ensuring long-term durability and structural integrity in pavement rehabilitation. However, the underlying interfacial bonding mechanism remains poorly understood at different scales. This paper investigates the mechanism of MPC/PCC interface properties by multiscale methods with macro-microscopic tests and molecular dynamic (MD) simulation. The results demonstrated that the flexural strength of the MPC/PCC specimen was highly sensitive to both crack lengths and fracture modes. Mode II of the specimen consistently showed the superior shear-dominated resistance behaviour. The high porosity and microcracks in sub-ITZs corresponded closely with the gradient change in elastic modulus and fracture toughness, underscoring the critical role of pore distribution in interface mechanical performance. Excellent bonding behaviour and fracture resistance of MPC/PCC interface driven by the formation of phosphate-based hydration products, dense interfacial microstructures and strong interfacial chemical bonding were validated by Raman spectroscopy.
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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) | 0.000 | 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