Investigation of the carbonation performance of cement-based materials under high temperatures
| Autor: | Yasuhide Higo, Takahito Nozaki, Dianchao Wang, Takafumi Noguchi |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Cement
Materials science Carbonation 0211 other engineering and technologies 020101 civil engineering 02 engineering and technology Building and Construction Carbon sequestration Atmospheric temperature range 0201 civil engineering chemistry.chemical_compound Calcium carbonate chemistry Chemical engineering 021105 building & construction Carbon dioxide Carbonate General Materials Science Relative humidity Civil and Structural Engineering |
| Zdroj: | Construction and Building Materials. 272:121634 |
| ISSN: | 0950-0618 |
| DOI: | 10.1016/j.conbuildmat.2020.121634 |
| Popis: | The waste carbon dioxide generated in heavy industries usually accompanies by high temperatures and vapor. To fully utilize the high temperature and improve the carbon dioxide sequestration efficiency, this study has tested and evaluated the carbonation performance of cement paste in a broad temperature range from 20 °C to 300 °C. The results indicate that carbonation speed could be effectively improved under high temperatures in a short period (1 h) at the liquid water existing conditions. Besides, relative humidity and water to cement ratio effect at 100 °C were also investigated. The carbonation mechanisms at different vapor content have been explored from the viewpoint of carbonate substances transportation in high-temperature environments. The contribution of hydrated products to calcium carbonate varies with vapor content, and the high carbonation speed usually accompanies by the generation of the metastable calcium carbonate. |
| Databáze: | OpenAIRE |
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