Properties of Shotcrete According to Accelerator Types and Mixing Ratios
| Autor: | Seunghak Choi, Seungyeon Han, Hyeonsuk Kim, Kyongku Yun, Taeho Ha |
|---|---|
| Rok vydání: | 2021 |
| Zdroj: | Journal of the Korean Society of Hazard Mitigation. 21:1-7 |
| ISSN: | 2287-6723 1738-2424 |
| DOI: | 10.9798/kosham.2021.21.6.1 |
| Popis: | Shotcrete should be attached to the ground and should have stable strength for a long-term. It should develop strength earlier for rapid work. Therefore, in this study, three types of accelerators—aluminate, cement mineral, and alkali-free—were selected and mixed to secure the initial strength. Depending on the type and mixing rate of each accelerator, slump, air amount, and compressive strength were used to evaluate the basic properties, boiling water absorption test, and chloride ion penetration resistance to conduct durability analysis. The mixing of aluminate-based and cement-mineral-based accelerators was effective in improving the initial strength, and alkali-free accelerator was effective in improving the long-term strength. The mixture to which accelerators were not mixed showed the highest water-tightness. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|