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Frontiers of Structural and Civil Engineering

Front. Struct. Civ. Eng.    2019, Vol. 13 Issue (4) : 998-1006
Mechanical properties of steel, glass, and hybrid fiber reinforced reactive powder concrete
Atheer H. M. ALGBURI, M. Neaz SHEIKH, Muhammad N. S. HADI()
School of Civil, Mining and Environmental Engineering, University of Wollongong, NSW 2522, Australia
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This study examines the properties of fiber-reinforced reactive powder concrete (FR-RPC). Steel fibers, glass fibers, and steel-glass hybrid fibers were used to prepare the FR-RPC. The non-fibrous reactive powder concrete (NF-RPC) was prepared as a reference mix. The proportion of fibers by volume for all FR-RPC mixes was 1.5%. Steel fibers of 13 mm length and 0.2 mm diameter were used to prepare the steel fiber-reinforced RPC (SFR-RPC). Glass fibers of 13 mm length and 1.3 mm diameter were used to prepare the glass fiber-reinforced RPC (GFR-RPC). The hybrid fiber-reinforced RPC (HFR-RPC) was prepared by mixing 0.9% steel fibers and 0.6% glass fibers. Compressive strength, axial load-axial deformation behavior, modulus of elasticity, indirect tensile strength, and shear strength of the RPC mixes were investigated. The results showed that SFR-RPC achieved higher compressive strength, indirect tensile strength and shear strength than NF-RPC, GFR-RPC, and HFR-RPC. Although the compressive strengths of GFR-RPC and HFR-RPC were slightly lower than the compressive strength of NF-RPC, the shear strengths of GFR-RPC and HFR-RPC were higher than that of NF-RPC.

Keywords reactive powder concrete      steel fiber      glass fiber      hybrid fiber     
Corresponding Authors: Muhammad N. S. HADI   
Just Accepted Date: 22 April 2019   Online First Date: 17 May 2019    Issue Date: 10 July 2019
 Cite this article:   
Atheer H. M. ALGBURI,M. Neaz SHEIKH,Muhammad N. S. HADI. Mechanical properties of steel, glass, and hybrid fiber reinforced reactive powder concrete[J]. Front. Struct. Civ. Eng., 2019, 13(4): 998-1006.
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Atheer H. M. ALGBURI
Muhammad N. S. HADI
Fig.1  Steel and glass fibers
property steel fiber [22] glass fiber [23]
length (mm) 13 13
diameter (mm) 0.2 1.3
aspect ratio (length/diameter) 65 10
density (g/cm3) 7.8 2.8
tensile strength (MPa) 2500 1500
Tab.1  Properties of steel and glass fibers
Fig.2  Flow table test
Fig.3  Test setup for axial load-axial deformation behavior
Fig.4  Test setup for splitting tensile strength
Fig.5  Schematic of the direct shear test
Fig.6  Test setup for shear strength
Fig.7  Age versus compressive strength for NF-RPC
Fig.8  Typical failure modes of NF-RPC and FR-RPC under compressive axial load
mix notation compressive strength (MPa) average flow diameter (mm) modulus of elasticity, E (GPa) indirect tensile strength, T (MPa) shear strength, τ
NF-RPC 90 200 39 7.6 10
St. Dev. 1.52 - 2.12 0.23 1.41
SFR-RPC 96 190 40 9.9 25
St. Dev. 2.51 - 2.83 0.26 3.05
GFR-RPC 81 180 37 5.7 16
St. Dev. 2.64 - 2.52 0.32 2.30
HFR-RPC 85 185 39 9.1 22
St. Dev. 2.46 - 2.51 0.37 2.64
Tab.2  Experimental mechanical properties of NF-RPC and FR-RPC at 28 days *
Fig.9  Typical axial load-axial deformation behavior of NF-RPC and FR-RPC
Fig.10  Typical stress-strain behavior of NF-RPC and FR-RPC
Fig.11  Typical failure modes of SFR-RPC, GFR-RPC and HFR-RPC under splitting tensile test
Fig.12  Typical failure modes of NF-RPC and FR-RPC under direct shear
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