A study of the influence of slag alkali level on the alkali-silica reactivity of slag concrete

Title: A study of the influence of slag alkali level on the alkali-silica reactivity of slag concrete
Authors: Hester, David
McNally, Ciaran
Richardson, Mark G.
Permanent link: http://hdl.handle.net/10197/2272
Date: Nov-2005
Abstract: Ground granulated blast furnace slag (ggbs), can reduce the alkali load in concrete, despite its relatively high alkali content. Most research has been devoted to the efficacy of slag with an alkali content of less than 1.0% and this is reflected in guidance documents. A comparative assessment was made of the effect, if any, of the alkali level of ggbs on potential alkali-silica reactivity. Expansion tests were performed on a matrix of concrete mixes using Irish normal Portland cement, two slags of differing alkali content, three aggregates and alkali loads of 5 and 6 kg Na2Oeq./m(3). A replacement level of 50% was used throughout. No significant difference in behaviour was apparent, irrespective of aggregate type or alkali load, indicating that the alkali level of the slag is not a contributory factor at the 50% replacement level.
Funding Details: Other funder
Type of material: Journal Article
Publisher: Elsevier
Copyright (published version): 2005 Elsevier Ltd
Keywords: ASR;ggbs;Mortar bar expansion test
Subject LCSH: Slag cement
Alkali-aggregate reactions
Concrete--Testing
Concrete--Deterioration
Concrete--Additives
DOI: 10.1016/j.conbuildmat.2005.02.016
Language: en
Status of Item: Peer reviewed
Appears in Collections:Critical Infrastructure Group Research Collection
Civil Engineering Research Collection

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