Effect of moisture conditions and transfers on alkali silica reaction damaged structures
- Universite de Toulouse, UPS, INSA, LMDC - Laboratoire Materiaux et Durabilite des Constructions, 135, avenue de Rangueil, F-31 077 Toulouse Cedex 04 (France)
- Universite Paris-Est, Laboratoire Central des Ponts et Chaussees (LCPC), 58, bd Lefebvre, 75 732 Paris Cedex 15 (France)
The aim of this paper is to point out the water driving effect on the alkali silica reaction (ASR) expansion and particularly when modifications of moisture conditions occur. After being submitted to a unidirectional moisture gradient during 14 months, the upper faces of ASR reactive beams were covered by water for 9 months. This late water supply on the upper face rapidly produced large expansions, which mainly occurred along the transverse and the vertical directions resulting in large longitudinal cracks. Companion nonreactive specimens were kept in the same environmental conditions in order to quantify the basic characteristics of moisture-dependent expansive behaviour of the material. The paper focuses on the effects of late water supply or late drying on already ASR-damaged concrete, which is a significant concern for real-life structures. Both structural effects of late water supply on ASR progress in already damaged structures and interpretation of such phenomena are described.
- OSTI ID:
- 21347456
- Journal Information:
- Cement and Concrete Research, Vol. 40, Issue 6; Other Information: DOI: 10.1016/j.cemconres.2010.01.011; PII: S0008-8846(10)00026-8; Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0008-8846
- Country of Publication:
- United States
- Language:
- English
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