Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/44162

TitleResults comparison of alkali-reactivity tests for same aggregates, using a kinetic model
Author(s)Mayor Gonzalez, Luis Alberto
Silva, António Santos
Jalali, Said
KeywordsExpansion tests
Reactivity
Alkali-silica reaction
Aggregates
Issue dateFeb-2015
PublisherTrans Tech Publications
JournalKey Engineering Materials
CitationGonzalez L. M., Santos Silva A., Jalali S. Results comparison of alkali-reactivity tests for same aggregates, using a kinetic model, Key Engineering Materials, Vol. 634, pp. 498-505, doi:doi:10.4028/www.scientific.net/KEM.634.498, 2015
Abstract(s)A kinetic based comparison between expansion tests for alkali-aggregate reactivity was carried out deriving critical rates from test criteria, in an earlier paper. The present paper checks the assumptions and models of that earlier comparison against results with real aggregates varying in alkali reactivity. Using the same approach, for each aggregate, expansion rates for three expansion tests were estimated, corrected for alkalinity and depicted as an Arrhenius plot. The relationship used data from NF P18-590, ASTM C 1260 and ASTM C 227 expansion test-methods and shows linear Arrhenius plots for several aggregates, aligned almost parallel to the line obtained for test criteria. Aspects related to the different experimental conditions on test-methods and their effects are discussed. The proposed conclusion is that both standards and aggregate results, in the given conditions, are not inconsistent from the kinetic point of view. Some suggestions are made for improving the accuracy of the relationship obtained.
TypeConference paper
URIhttp://hdl.handle.net/1822/44162
DOI10.4028/www.scientific.net/KEM.634.498
ISSN1013-9826
Peer-Reviewedyes
AccessRestricted access (UMinho)
Appears in Collections:C-TAC - Artigos em Revistas Internacionais

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