| Autor: |
Yang Li, Hui Zhang, Zhenzhong Zhang, Yan Li, Heqi Fang, Jun Yuan, Shengwen Tang |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
|
| Zdroj: |
Developments in the Built Environment, Vol 18, Iss , Pp 100454- (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2666-1659 |
| DOI: |
10.1016/j.dibe.2024.100454 |
| Popis: |
The early-age cracking sensitivity of cement-based materials containing alkalis with different metal ions (Na+ and K+) is investigated. The results indicate that alkalis containing both Na+ and K+ can promote the early cracking sensitivity of cement-based materials, in which K+ having a higher promoting effect than Na+. By exploring the shrinkage properties, hydration process, pore structure and micromechanics, the mechanism of the cracking performance of cement-based materials containing alkalis with different metal ions are revealed. According to the experimental results and the analysis of mechanism, alkali enhances the cracking sensitivity of cement-based materials by increasing their shrinkage rate, promoting hydration process, and refining pore structure. But the improvement of cracking sensitivity of cement-based materials containing alkalis with Na+ or K+ is related to cohesive force and structure of calcium silicate hydrates clusters. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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