TY - JOUR
T1 - The use of steel fibers to enhance the performance of concrete made with recycled aggregate
AU - Kachouh, Nancy
AU - El-Hassan, Hilal
AU - El Maaddawy, Tamer
N1 - Funding Information:
This project is supported by the United Arab Emirates University (UAEU) under grant number 31N258. The contributions of the UAEU engineers and staff are greatly appreciated.
Publisher Copyright:
© 2019 International Committee of the SCMT conferences. All rights reserved.
PY - 2019
Y1 - 2019
N2 - This research investigates the effect of replacing natural coarse aggregates with recycled concrete aggregates (RCA) on the performance of normal-strength (30 MPa) concrete. To promote 100% replacement, steel fibers were incorporated at 0-2%, by volume (vf). Locally-abundant dune sand served as sustainable fine aggregates. Physical, rheological, and mechanical properties were evaluated through experimental testing, including slump, density, compressive strength, and flexural strength. Results of plain concrete showed that an increase in RCA replacement led to a decrease in density and slump. The addition of steel fibers increased the density but decreased the slump. Compared to the control sample, the compressive and flexural strengths decreased by 18 and 51% with 100% RCA replacement. The incorporation of 2% steel fibers could restore the former by 90% and nearly doubled the latter. Findings provide evidence on the feasibility of producing steel fiber-reinforced normal-strength concrete with 100% RCA that is suitable for structural applications.
AB - This research investigates the effect of replacing natural coarse aggregates with recycled concrete aggregates (RCA) on the performance of normal-strength (30 MPa) concrete. To promote 100% replacement, steel fibers were incorporated at 0-2%, by volume (vf). Locally-abundant dune sand served as sustainable fine aggregates. Physical, rheological, and mechanical properties were evaluated through experimental testing, including slump, density, compressive strength, and flexural strength. Results of plain concrete showed that an increase in RCA replacement led to a decrease in density and slump. The addition of steel fibers increased the density but decreased the slump. Compared to the control sample, the compressive and flexural strengths decreased by 18 and 51% with 100% RCA replacement. The incorporation of 2% steel fibers could restore the former by 90% and nearly doubled the latter. Findings provide evidence on the feasibility of producing steel fiber-reinforced normal-strength concrete with 100% RCA that is suitable for structural applications.
KW - Concrete
KW - Normal strength concrete
KW - Recycled aggregate
KW - Steel fibers
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M3 - Conference article
AN - SCOPUS:85071116094
SN - 2515-3048
VL - 1
JO - Sustainable Construction Materials and Technologies
JF - Sustainable Construction Materials and Technologies
T2 - 5th International Conference on Sustainable Construction Materials and Technologies, SCMT 2019
Y2 - 14 July 2019 through 17 July 2019
ER -