Behaviour of Ambient Cured Steel Fibre Reinforced Geopolymer Concrete Columns Under Axial and Flexural Loads

Farhan, Nabeel A.; Sheikh, M. Neaz; Hadi, Muhammad N.S.

doi:10.1016/j.istruc.2018.07.001

Cited by 60 publications

(28 citation statements)

References 28 publications

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“…They asserted that steel fibers absorb energy more significantly than synthetic fibers while used as reinforcement. Farhan et al (2018) investigated the behavior of concrete column specimens reinforced by steel fibers under different loading conditions. Three types of steel fibers including straight micro steel fiber, deformed macro steel fiber, and hybrid steel fiber were used in reinforcing the concrete column specimens.…”

Section: Introductionmentioning

confidence: 99%

On axial compressive behavior of steel fiber reinforced concrete confined by FRP

Saberi

Hatami

Rahai

2021

Advances in Structural Engineering

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In this study, the co-effects of steel fibers and FRP confinement on the concrete behavior under the axial compression load are investigated. Thus, the experimental tests were conducted on 18 steel fiber-reinforced concrete (SFRC) specimens confined by FRP. Moreover, 24 existing experimental test results of FRP-conﬁned specimens tested under axial compression are gathered to compile a reliable database for developing a mathematical model. In the conducted experimental tests, the concrete strength was varied as 26 MPa and 32.5 MPa and the steel fiber content was varied as 0.0%, 1.5%, and 3%. The specimens were confined with one and two layers of glass fiber reinforced polymer (GFRP) sheet. The experimental test results show that simultaneously using the steel fibers and FRP confinement in concrete not only significantly increases the peak strength and ultimate strain of concrete but also solves the issue of sudden failure in the FRP-confined concrete. The simulations confirm that the results of the proposed model are in good agreement with those of experimental tests.

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Section: Introductionmentioning

confidence: 99%

On axial compressive behavior of steel fiber reinforced concrete confined by FRP

Saberi

Hatami

Rahai

2021

Advances in Structural Engineering

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“…The inclusion of carbon, polyvinyl alcohol and polypropylene fibers in GPC are found to have inadequate resistance to elevated temperature, weak bond strength, and high sensitivity to solar radiation [31]. However, the presence of steel fibers in GPC are found to enhance ductility by improving the tensile and flexure strengths, controlling the crack width and energy absorption capacity [33]. The effectiveness of steel fibers in GPC relies on numerous parameters, including the fiber content by weight or volume, strength, geometry and aspect ratio [33].…”

Section: Introductionmentioning

confidence: 99%

“…However, the presence of steel fibers in GPC are found to enhance ductility by improving the tensile and flexure strengths, controlling the crack width and energy absorption capacity [33]. The effectiveness of steel fibers in GPC relies on numerous parameters, including the fiber content by weight or volume, strength, geometry and aspect ratio [33].…”

Section: Introductionmentioning

confidence: 99%

“…Many studies have been reported on GPC, with the major focus of research on the evaluation of the engineering properties of GPC mixes, such as mix proportion development, effect of source material on physical, chemical, microstructural, mechanical, rheological, and durability properties [33]. Some studies are also available on the behavior of GPC structural members, which highlight equally good and, in certain cases, better performance than conventional concrete [34][35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

“…It was reported that cracking patterns and loading capacity of GPC beams were analogous to RCC beams [36]. evaluated the performance of FA-and SG-based GPC columns and reported that most of the columns failed around the mid-height of specimens, and steel fibers can be incorporated to increase the loading capacity and ductility of columns [33]. GPC, therefore, can be considered as an alternative to conventional concrete construction due to the reduction in energy consumption, CO 2 emissions, low cost, and effective consumption of waste materials.…”

Section: Introductionmentioning

confidence: 99%

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Behavior of Quarry Rock Dust, Fly Ash and Slag Based Geopolymer Concrete Columns Reinforced with Steel Fibers under Eccentric Loading

Waqas

Butt

2021

Applied Sciences

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Geopolymer concrete, also known as an earth-friendly concrete, has been under continuous study due to its environmental benefits and a sustainable alternative to conventional concrete construction. The supplies of many source materials, such as fly ash (FA) or slag (SG), to produce geopolymer concrete (GPC) may be limited; however, quarry rock dust (QRD) wastes (limestone, dolomite, or silica powders) formed by crushing rocks appear virtually endless. Although significant experimental research has been carried out on GPC, with a major focus on the mix design development, rheological, durability, and mechanical properties of the GPC mixes; still the information available on the structural behavior of GPC is rather limited. This has implications in extending GPC application from a laboratory-based technology to an at-site product. This study investigates the structural behavior of quarry-rock-dust-incorporated fiber-reinforced GPC columns under concentric and eccentric loading. In this study, a total of 20 columns with 200 mm square cross-section and 1000 mm height were tested. The FA and SG were used as source materials to produce GPC mixtures. The QRD was incorporated as a partial replacement (20%) of SG. The conventional concrete (CC) columns were prepared as the reference specimens. The effect of incorporating quarry rock dust as a replacement of SG, steel fibers, and loading conditions (concentric and eccentric loading) on the structural behavior of GPC columns were studied. The test results revealed that quarry rock dust is an adequate material that can be used as a source material in GPC to manufacture structural concrete members with satisfactory performance. The general performance of the GPC columns incorporating QRD (20%) is observed to be similar to that of GPC columns (without QRD) and CC columns. The addition of steel fibers considerably improves the loading capacity, ductility, and axial load–displacement behavior of the tested columns. The load capacities of fiber-reinforced GPC columns were about 5–7% greater in comparison to the CC columns. The spalling of concrete cover at failure was detected in all plain GPC columns, whereas the failure mode of all fiber-reinforced GPC columns is characterized with surface cracking leading to disintegration of concrete cover.

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Axial and bending behavior of GFRP bar‐reinforced hollow‐core polypropylene fiber concrete columns

Ahmad,

Sheikh,

Hadi

2024

Structural Concrete

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This study reported the axial (concentric and eccentric) and bending (four‐point bending) loadings behavior of glass fiber‐reinforced polymer (GFRP) bar‐reinforced hollow‐core polypropylene fiber concrete (HC‐GFRP‐PFC) columns. The confinement effect of HC‐GFRP‐PFC columns with different center‐to‐center (c/c) spacing of GFRP spirals was also investigated. Twelve hollow‐core circular specimens with an outer diameter of 214 mm and an inner (circular hole) diameter of 56 mm were experimentally investigated. Four reference specimens were cast with nonfibrous (normal) concrete, whereas the remaining eight specimens were cast with polypropylene fiber (0.15% by volume of concrete) concrete. It was found that, with a similar ratio of reinforcement, the HC‐GFRP‐PFC specimens gained 2%–4% higher maximum load (PMaximum) and 9%–19% higher ductility (μ) than the GFRP bar‐reinforced hollow‐core nonfibrous concrete (HC‐GFRP‐NFC) specimens under concentric axial loading and four‐point bending. The HC‐GFRP‐PFC specimens with a 30 mm c/c spacing of the GFRP spiral gained 6%–36% higher PMaximum and 4%–59% higher μ than the HC‐GFRP‐PFC specimens with a 60 mm c/c spacing of the GFRP spirals under different loading conditions.

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Behaviour of Ambient Cured Steel Fibre Reinforced Geopolymer Concrete Columns Under Axial and Flexural Loads

Cited by 60 publications

References 28 publications

On axial compressive behavior of steel fiber reinforced concrete confined by FRP

On axial compressive behavior of steel fiber reinforced concrete confined by FRP

Behavior of Quarry Rock Dust, Fly Ash and Slag Based Geopolymer Concrete Columns Reinforced with Steel Fibers under Eccentric Loading

Axial and bending behavior of GFRP bar‐reinforced hollow‐core polypropylene fiber concrete columns

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