Title: Process dependence of shotcrete for repairs

Authors: Vivek Bindiganavile, Nemkumar Banthia

Addresses: Department of Civil and Environmental Engineering, University of Alberta, 3-020, Markin/CNRL-NREF Bldg., Edmonton, AB, T6G 2W2, Canada. ' Department of Civil Engineering, University of British Columbia, #2024-6250 Applied Science Lane, CEME Bldg., Vancouver, B.C. V6T 1Z4, Canada

Abstract: In the study presented here, the authors illustrate that the properties of steel fibre reinforced shotcrete are a function of the manufacturing process. The paper examines the causes for the higher penetration resistance in dry-mix shotcrete, while highlighting the differences in composition and rebound during the fresh state. A strong influence of the spray process is witnessed on the hardened properties under both compression and flexure. For an identical fibre content, the toughness of shotcrete is noticeably different from that of the corresponding cast concrete. It is seen that the optimal post-crack performance is achieved via the wet process technique.

Keywords: dry process; flexural toughness; penetration resistance; rebound; steel fibre reinforced shotcrete; steel fibre; wet process; corrosion repair; concrete structures; concrete repair; spray process.

DOI: 10.1504/IJMPT.2005.007729

International Journal of Materials and Product Technology, 2005 Vol.23 No.3/4, pp.240 - 256

Published online: 07 Sep 2005 *

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