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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: The use of reaction kinetics in classifying alkali silica reactivity potential of aggregates
Author(s): B. Bornstein, D. Hocking, J. Bacolod, V. Sirivivatnanon
Appears on pages(s): 704–711
Keywords: Aggregates; Alkali silica reactions; Concrete; Standardization; Standards; Test procedures
Abstract:The Australian Standard accelerated mortar bar test (AMBT) method, AS 1141.60.1, adopts the expansion limits at two exposure periods to classify the alkali silica reactivity (ASR) of aggregate. This was a first step toward the use of ‘reaction kinetics’ or ‘rate of reaction’ to detect and classify alkali silica reactivity. The AS 1141.60.2 concrete prism test (CPT), on the other hand, uses a single expansion limit at one year to classify ASR. This paper examines the validity of the use of reaction kinetics, evaluated from the AMBT expansion data, to gauge and classify the reactivity. This may enable a better quantification of the degrees of reactivity and a more fundamental approach to ASR mitigation.
Cement Concrete & Aggregates Australia, International Partner Access.
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