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TitleCorrosion of aluminium metal in OPC- and CAC-based cement matrices
Publication TypeJournal Article
Year of Publication2013
AuthorsKinoshita, H., Swift P., Utton C., Carro-Mateo B., Marchand G., Collier N., and Milestone N.
JournalCement and Concrete Research
Pagination11 - 18
Date Published2013
ISSN00088846 (ISSN)
KeywordsAluminium metals, aluminum, Blast furnaces, Blended cement, Calcium aluminate cement, Calcium aluminate cement (d), Calcium Compounds, Calcium phosphate cement, Cement phasis, Cements, Corrosion, Corrosion reaction, Ordinary Portland cement, Radioactive wastes, Slags
AbstractCorrosion of aluminium metal in ordinary Portland cement (OPC) based pastes produces hydrogen gas and expansive reaction products causing problems for the encapsulation of aluminium containing nuclear wastes. Although corrosion of aluminium in cements has been long known, the extent of aluminium corrosion in the cement matrices and effects of such reaction on the cement phases are not well established. The present study investigates the corrosion reaction of aluminium in OPC, OPC-blast furnace slag (BFS) and calcium aluminate cement (CAC) based systems. The total amount of aluminium able to corrode in an OPC and 4:1 BFS:OPC system was determined, and the correlation between the amount of calcium hydroxide in the system and the reaction of aluminium obtained. It was also shown that a CAC-based system could offer a potential matrix to incorporate aluminium metal with a further reduction of pH by introduction of phosphate, producing a calcium phosphate cement. © 2013 Published by Elsevier Ltd.

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