Structural Behavior of Concrete Beams Affected by Alkali-Silica Reaction


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Title: Structural Behavior of Concrete Beams Affected by Alkali-Silica Reaction

Author(s): S. Multon, J.-F. Seignol, and F. Toutlemonde

Publication: Materials Journal

Volume: 102

Issue: 2

Appears on pages(s): 67-76

Keywords: alkali-silica reaction; beam; expansion; reinforcement

Date: 3/1/2005

A large experimental program about alkali-silica reaction (ASR) was carried out on beam specimens at the Laboratoire Central des Ponts et Chaussées (LCPC), with Electricité de France (EDF) as a partner. The aim was to provide data intended to validate a methodology of assessment of real structures affected by this expansive reactive mechanism. Three-dimensional deformations were measured on five 3 m-long plain or reinforced concrete beams undergoing partial drying over a period of 14 months. The paper points out the effect of a moisture gradient over the depth of the beams and the influence of reinforcement on the development of ASR-induced expansions. Tests on companion specimens (cylinders and prisms) were carried out to measure the material expansion and mechanical characteristics.