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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
engineering
Swellings due to alkali-silica reaction and delayed ettringite formation: Characterisation of expansion isotropy and effect of moisture conditions
Cement and Concrete Composites, Volume 34, No. 3, Year 2012
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Description
This paper investigates the effect of different conditions on the development of concrete expansions due to alkali-silica reaction (ASR), delayed ettringite formation (DEF) and their combination. The presence of products of the two reactions has been observed during structure diagnosis. The aim of this research is to study the two reactions in concretes with close mix designs but with various types of aggregate and moisture conditions. Measurements performed in the three directions of stress-free specimens showed that DEF expansions could be considered as isotropic for stress-free material. DEF expansions were largely influenced by the storage conditions (immersed in water or in sealed conditions). The volume of storage water modified the kinetics. Under sealed conditions, no expansions were measured for mortar containing non-reactive aggregate, while small positive strains were obtained for mortar containing reactive aggregate. In all cases, new water supply caused fast, large expansions. The different effects of alkali leaching and moisture conditions on DEF and ASR expansions are discussed. © 2011 Elsevier Ltd. All rights reserved.
Authors & Co-Authors
Bouzabata, Hassina
France, Toulouse
Université Toulouse Iii - Paul Sabatier
Algeria, Constantine
Université Constantine 1
Multon, Stéphane
France, Toulouse
Université Toulouse Iii - Paul Sabatier
Sellier, Alain
France, Toulouse
Université Toulouse Iii - Paul Sabatier
Houari, Hacène
Algeria, Constantine
Université Constantine 1
Statistics
Citations: 25
Authors: 4
Affiliations: 2
Identifiers
Doi:
10.1016/j.cemconcomp.2011.10.006
ISSN:
09589465
Research Areas
Environmental