ISSN: 0149-6123
Page Count: 12

Evaluation of Laboratory Test Methods for Alkali-Silica Reactivity
Fournier, B
Manager and emeritas scientist, International Centre for Sustainable Development of Cement and Concrete (ICON)/CANMET, Ont.

Malhotra, VM
Manager and emeritas scientist, International Centre for Sustainable Development of Cement and Concrete (ICON)/CANMET, Ont.

(Received 2 October 1998; accepted 14 July 1999)

Abstract

In 1991, the Canada Centre for Mineral and Energy Technology (CANMET) initiated a major research project dealing with preventive measures against alkali-silica reaction (ASR) in concrete. The main objective of the above project is to develop a comparative field and laboratory engineering database on the longterm effectiveness of supplementary cementing materials (SCMs) in controlling and/or reducing expansion and cracking in concrete due to ASR. The results obtained to date indicate that the effectiveness of SCMs in controlling expansion due to ASR is a function of various parameters such as the composition and proportion of the different types of SCMs in concrete (for example, fly ash, slag, silica fume), the total cementitious materials and/or total alkali content in the system, and the reactivity level of the aggregate. Accelerated concrete prism and mortar bar expansion test methods can be used in the laboratory to predict the long-term performance of SCMs in controlling expansion due to ASR.

Keywords:
Alkali-silica reaction (ASR), fly ash, granulated blast-furnace slag, preventive measures, silica fume, supplementary cementing materials

Paper ID: CCA10431J
DOI: 10.1520/CCA10431J
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