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Numerical simulation of self-consolidating concrete flow as a heterogeneous material in L-Box set-up: coupled effect of reinforcing bars and aggregate content on flow characteristics

Authors
  • Hosseinpoor, Masoud1
  • Khayat, Kamal H.2
  • Yahia, Ammar1
  • 1 Université de Sherbrooke, Department of Civil Engineering, Sherbrooke, QC, J1K2R1, Canada , Sherbrooke (Canada)
  • 2 Missouri University of Science and Technology, Department of Civil, Architectural and Environmental Engineering, Rolla, MO, 65409-0710, USA , Rolla (United States)
Type
Published Article
Journal
Materials and Structures
Publisher
Springer - RILEM Publishing
Publication Date
Apr 07, 2017
Volume
50
Issue
2
Identifiers
DOI: 10.1617/s11527-017-1032-8
Source
Springer Nature
Keywords
License
Yellow

Abstract

A computational fluid dynamics software was employed to simulate the coupled effect of reinforcing bar spacing and coarse aggregate content on the blocking resistance and shear-induced segregation of self-consolidating concrete (SCC) along the horizontal channel of the L-Box apparatus. The rheology of the modelled suspending fluid, which corresponds to the stable and homogeneous portion of the mixture, consists of plastic viscosity value of 25 Pa s, yield stress values of 75 Pa, fluid density of 2500 kg/m3, and shear elasticity modulus value of 100 Pa. Two different values of 20-mm spherical particles (135 and 255 particles in total), as well as three bar arrangements consisting of 0, 3, and 18 bars distributed along the horizontal channel of the L-Box were considered in the numerical simulations. A new approach is proposed to evaluate the coupled effect of reinforcing bar arrangements and the number of spherical particles on the flow performance of SCC.

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