Limestone-Siliceous and Siliceous concretes thermal damaging at high temperature
| Autor: | H Mastori, Mickaël Antoni, P. Piluso, J.-F Haquet, Renaud Denoyel |
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| Přispěvatelé: | Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Matériaux divisés, interfaces, réactivité, électrochimie (MADIREL), Aix Marseille Université (AMU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Antoni, Mickaël |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
0211 other engineering and technologies 020101 civil engineering Thermal stress 02 engineering and technology Corium 7. Clean energy 0201 civil engineering law.invention chemistry.chemical_compound law Molten metal 021105 building & construction Thermal General Materials Science Porosity Hot melt Reactor pressure vessel Civil and Structural Engineering [CHIM.MATE] Chemical Sciences/Material chemistry Nuclear fuel Metallurgy Building and Construction [CHIM.MATE]Chemical Sciences/Material chemistry Nuclear reactor Calcium carbonate chemistry Concrete |
| Popis: | Pré-publication : Construction and Building Materials 228 (2019) 116671; Limestone-siliceous and siliceous concretes are used in reactor pits of French nuclear power plants. In case of severe nuclear reactor accident, failure of the reactor vessel would lead to interaction between molten corium (hot melt of nuclear fuel) and concrete. This paper focuses on the thermal degradation of both limestone-siliceous and siliceous concretes till 1000°C. Thermo-Gravimetric Analysis (TGA) and Mercury Intrusion Porosimetry (MIP) are used to measure mass loss and porosity modification. As concretes are heterogeneous materials, sampling and representativeness have been addressed. TGA experiments show larger mass loss for limestone-siliceous concretes due to the decarbonation of calcium carbonate gravels when T>800°C. MIP experiments demonstrate a 100% increase of porosity for limestone-siliceous (resp. siliceous) concretes when T> 500°C (resp. T> 800°C). The consequences of these results are discussed in the frame of experimental tests on prototypical corium systems aimed at describing the key-phenomena involved in molten corium concrete interaction. |
| Databáze: | OpenAIRE |
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