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BIBTEX RIS

Alkali-aggregate reaction in Nova Scotia II. Field and petrographic studies

1973; Elsevier BV; Volume: 3; Issue: 2 Linguagem: Francês

10.1016/0008-8846(73)90042-2

ISSN

1873-3948

Autores

M.A.G. Duncan, J. E. Gillott, E.G. Swenson,

Tópico(s)

Mine drainage and remediation techniques

Resumo

Certain siliceous and sedimentary rocks in Nova Scotia, when used as aggregate with high alkali cement, have produced excessive expansion of concrete. Laboratory studies showed a type of alkali-aggregate reaction to be responsible. Rock types in structures and in aggregate sources were identified by petrographic examination, the main types being selected for study of alkali-reactivity. En Nouvelle-Écosse, l'utilisation de certaines roches siliceuses et sédimentaires comme granulat avec du ciment riche en alcali a produit une dilatation excessive du béton. Des analyses en laboratoire en rendent responsible une sorte de réaction entre l'alcali et le granulat. On a identifié ces type de roche dans des structures et sources de granulat au moyen c'examens pétrographiques, et on en a choisi les types principaux pour étude de réactivité de l'alcali.

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