STRUCTURAL BEHAVIOR OF CONCRETE BEAMS AFFECTED BY ALKALI-SILICA REACTION

This article reports on an alkali-silica reaction (ASR) study that was carried out on beam specimens at the Laboratoire Central des Ponts et Chaussees (LCPC), with Electricite de France (EDF) as a partner. In the study, 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 authors discuss 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, including longitudinal strains and beam deflections, transverse strains, vertical strains, and cracking. The authors make three main conclusions: the anisotropy of ASR-induced expansions has been verified with vertical swellings twice as large as horizontal ones; significant ASR expansions (0.10%) can occur without an external water supply and can lead to significant structural degradation; and an increase in ASR expansions with an external water supply has been quantified by this work. The authors note that once models are validated in this framework, they will be used to assess the dimensional stability and the residual bearing capacity of real ASR-affected structures (e.g., bridges and dams).

  • Availability:
  • Supplemental Notes:
    • Journal date is March-April 2005
  • Corporate Authors:

    American Concrete Institute (ACI)

    38800 Country Club Drive
    Farmington Hills, MI  United States  48331
  • Authors:
    • Multon, S
    • Seignol, J-F
    • Toutlemonde, F
  • Publication Date: 2005-3

Language

  • English

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Filing Info

  • Accession Number: 00988948
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 15 2005 12:00AM