Effect of Multiaxial Stresses on Alkali-Silica Reaction Damage of Concrete

Alkali-silica reaction (ASR) causes expansion, cracking, and degradation of the mechanical properties of concrete. While ASR performance of unrestrained concrete specimens is relatively well understood, the ASR performance of concrete structures is complicated by co-acting stresses. This paper investigates the influence of sustained multiaxial stresses on the response of concrete undergoing ASR. Reactive concrete cube specimens (with three replicates) were subjected to different stress states, from no-stress to triaxial stress, and were subjected to accelerated curing until the exhaustion of expansion potential. The specimens were periodically core-drilled and the cores were tested for compressive strength and modulus of elasticity. Stress state influenced the degradation of mechanical properties and ASR-affected concrete behaved as an orthotropic material. ASR cracking was portrayed along three mutually perpendicular planes of multiaxially loaded concrete by performing damage rating index analysis. Surface cracking was also monitored. Triaxial confinement contributed to having reduced volumetric expansion and less cracking.

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    • Abstract reprinted with permission from the American Concrete Institute.
  • Authors:
    • Gautam, Bishnu Prasad
    • Panesar, Daman K
    • Sheikh, Shamim A
    • Vecchio, Frank J
  • Publication Date: 2017-7

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  • English

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  • Accession Number: 01642341
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 27 2017 10:05AM