Calcite formation on steamed concrete surfaces and its potential for sealing cracks
| Autor: | Moritz Zemann, Nico Herrmann, Frank Dehn |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Calcite
Cement Materials science Flow (psychology) 0211 other engineering and technologies 020101 civil engineering 02 engineering and technology Building and Construction 0201 civil engineering chemistry.chemical_compound chemistry 021105 building & construction General Materials Science Composite material Environmental scanning electron microscope Layer (electronics) Civil and Structural Engineering |
| Zdroj: | Construction and Building Materials. 203:1-8 |
| ISSN: | 0950-0618 |
| DOI: | 10.1016/j.conbuildmat.2019.01.091 |
| Popis: | Under accidental conditions, concrete containments of nuclear power plants often remain as final barrier to the environment. To evaluate the contribution of self-healing processes of cracked concrete containments, small scale experiments were conducted for given accident scenarios to examine the mineralogical processes on cement crack surfaces in contact with hot steam-air mixes. The surface analyses with ESEM, µ-RFA and microscope showed a calcite formation, where layer thicknesses increased along the exposure times until reaching a stable level. The potential for crack healing was principally demonstrated through flow measurements, where the outflowing mass decreased during the experiments along with increasing calcite formation. |
| Databáze: | OpenAIRE |
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