Relation of expansion due to alkali silica reaction to the degree of reaction measured by SEM image analysis

Journal Article · Wed Aug 15 00:00:00 EDT 2007 · Cement and Concrete Research

DOI:https://doi.org/10.1016/j.cemconres.2007.04.016· OSTI ID:21033058

Haha, M Ben ^[1]; Guidoum, A; Scrivener, K L ^[1]

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1. Laboratory of Construction Materials, Ecole Polytechnique Federale de Lausanne (Switzerland)

Scanning Electron Microscopy Image Analysis (SEM-IA) was used to quantify the degree of alkali silica reaction in affected microbars, mortar and concrete prisms. It was found that the degree of reaction gave a unique correlation with the macroscopic expansion for three different aggregates, stored at three temperatures and with two levels of alkali. The relationships found for the concretes and the mortars overlap when normalised by the aggregate content. This relationship seems to be linear up to a critical reaction degree which coincides with crack initiation within the reactive aggregates.

• OSTI ID: 21033058
• Journal Information: Cement and Concrete Research, Vol. 37, Issue 8; Other Information: DOI: 10.1016/j.cemconres.2007.04.016; PII: S0008-8846(07)00107-X; Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0008-8846
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CONCRETES
CRACK PROPAGATION
EXPANSION
IMAGE PROCESSING
MORTARS
SCANNING ELECTRON MICROSCOPY
SILICA