Formulating a Low-Alkalinity, High-Resistance and Low-Heat Concrete for Radioactive Waste Repositories
| Autor: | Didier Nectoux, Xavier Bourbon, Simone Courtois, Céline Cau Dit Coumes, Stéphanie Leclercq |
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| Přispěvatelé: | CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire EA(MS)2, Université Aix-Marseille II, IMT - MINES ALES (IMT - MINES ALES), Institut Mines-Télécom [Paris] (IMT), Service d'ergothérapie, Hôpital Swynghedauw, Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille), EDF (EDF), Agence Nationale pour la Gestion des Déchets Radioactifs (ANDRA) |
| Jazyk: | angličtina |
| Rok vydání: | 2006 |
| Předmět: |
Materials science
Silica fume [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th] 0211 other engineering and technologies Alkalinity Cement 02 engineering and technology [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] law.invention Pozzolan repository law 021105 building & construction General Materials Science Composite material Metakaolin Mixture-proportioning pH Slag Building and Construction 021001 nanoscience & nanotechnology 6. Clean water Portland cement Chemical engineering radioactive wastes Fly ash visual_art visual_art.visual_art_medium 0210 nano-technology Ternary operation Concrete |
| Zdroj: | Cement and Concrete Research Cement and Concrete Research, Elsevier, 2006, 36 (12), pp.2152-2163. ⟨10.1016/j.cemconres.2006.10.005⟩ Cement and Concrete Research, 2006, 36 (12), pp.2152-2163. ⟨10.1016/j.cemconres.2006.10.005⟩ |
| ISSN: | 0008-8846 |
| Popis: | International audience; Investigations were carried out in order to formulate and characterize low-alkalinity and low-heat cements which would be compatible with an underground waste repository environment. Several systems comprising Ordinary Portland Cement (OPC), a fast-reacting pozzolan (silica fume (SF) or metakaolin (MK)) and, in some cases, a slow-reacting product (fly ash (FA) or blastfurnace slag (BFS)) were compared. Promising results were obtained with some binary mixtures of OPC and SF, and with some ternary blends of OPC, SF and FA or BFS pH of water in equilibrium with the fully hydrated cements dropped below 11. Dependence of the properties of standard mortars on the high contents of FA and SF in the low-pH blends was examined. Combining SF and FA seemed attractive since SF compensated for the low reactivity of FA, while FA allowed to reduce the water demand, and dimensional variations of the mortars. Finally, low-heat ($\Delta T$ |
| Databáze: | OpenAIRE |
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