Effect of Alkali-Silica Reaction Expansion Rate and Confinement on Concrete Degradation

Journal Article · Wed Jan 01 00:00:00 EST 2020 · ACI Materials Journal

DOI:https://doi.org/10.14359/51720294· OSTI ID:1606033

Abd-Elssmand, Ammar ^[1]; Ma, John ^[1]; Le Pape, Yann ^[2]; Hayes, Nolan ^[1]; Guimaraes, Maria ^[3]

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1. Univ. of Tennessee, Knoxville, TN (United States)
2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
3. Electric Power Research Inst. (EPRI), Knovville, TN (United States)

Alkali-silica reaction (ASR) is a major deterioration mechanism that affects the durability of concrete structures. As the slow rate of ASR development and the restrained expansion in field concrete might affect the development of ASR damage, an experimental program was performed to investigate the effects of the rate of ASR expansion and confinement on the degradation of mechanical properties of concretes. Literature data on the degradation of mechanical properties of concretes with ASR expansion were collected and analyzed to investigate the influence of the rate of ASR expansion and confinement on the degradation trends. Degradation of mechanical properties was found to be significantly influenced by the rate of ASR expansion and slightly affected by confinements. The slow rate of ASR expansion seems to be beneficial in limiting concrete degradation. The effects of confinement seem to be related to the direction of restraint and crack orientations.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC05-00OR22725
• OSTI ID: 1606033
• Journal Information: ACI Materials Journal, Journal Name: ACI Materials Journal Journal Issue: 1 Vol. 117; ISSN 0889-325X
• Publisher: American Concrete Institute
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
alkali-silica reaction
confined concrete
crack orientation
mechanical properties degradation
rate of expansion