Effect of fiber type and content on the flexural behavior of high strength concrete beams with low reinforcement ratios

Gümüş, Muhammed; Arslan, Abdussamet

doi:10.1016/j.istruc.2019.02.018

Cited by 27 publications

(8 citation statements)

References 27 publications

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“…There has been some research where it was revealed that steel fibre incorporation in concrete mixture decreased the structural ductility of the reinforced concrete beams. Results show that it was very visible in the case of reinforcement ratio [31]. It has been known that steel fibre orientation and distribution throughout concrete structure cross-section significantly affects the strength.…”

Section: Introductionmentioning

confidence: 86%

Impact of Polypropylene, Steel, and PVA Fibre Reinforcement on Geopolymer Composite Creep and Shrinkage Deformations

Gailitis

Sprince

Kozlovksis

et al. 2023

J. Phys.: Conf. Ser.

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For the last 40 years, there has been increased interest in geopolymer composite development and its mechanical properties. In the last decades, there have been cases when geopolymer composites have been used for civil engineering purposes, such as buildings and infrastructure projects. The main benefit of geopolymer binder usage is that it has a smaller impact on the environment than the Portland cement binder. Emissions caused by geopolymer manufacturing are at least two times less than emissions caused by Portland cement manufacturing. As geopolymer polymerization requires elevated temperature, it also has a significant moisture evaporation effect that further increases shrinkage. It can lead to increased cracking and reduced service life of the structures. Due to this concern, for long-term strain reduction, such as plastic and drying shrinkage and creep, fibre reinforcement is added to constrain the development of stresses in the material. This research aims to determine how different fibre reinforcements would impact geopolymer composites creep and shrinkage strains. Specimens for long-term property testing purposes were prepared with 1% of steel fibres, 1% polypropylene fibres (PP), 0.5% steel and 0.5% polyvinyl alcohol fibres, 5% PP fibres, and without fibres (plain geopolymer). The lowest creep strains are 5% PP fibre specimens, followed by 1% PP fibre, plain, 0.5% steel fibre and 0.5% PVA fibre, and 1% steel fibre specimens. The lowest specific creep is to 5% PP fibre reinforced specimens closely followed by 1% PP fibre followed by 0.5% steel and 0.5% PVA fibre, plain and 1% steel fibre reinforced composites. Specimens with 0.5% steel and 0.5 PVA fibre showed the highest compressive strength, followed by 1% PP fibre specimens, plain specimens, 1% steel fibre, and 5% PP fibre reinforced specimens. Only specimens with 1% PP fibre and 0.5% steel, and a 0.5% PVA fibre inclusion showed improved mechanical properties. Geopolymer concrete mix with 1% PP fibre inclusion and 0.5% steel and 0.5% PVA fibre inclusion have a 4.7% and 11.3% higher compressive strength. All the other fibre inclusion into mixes showed significant decreases in mechanical properties.

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Section: Introductionmentioning

confidence: 86%

Impact of Polypropylene, Steel, and PVA Fibre Reinforcement on Geopolymer Composite Creep and Shrinkage Deformations

Gailitis

Sprince

Kozlovksis

et al. 2023

J. Phys.: Conf. Ser.

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“…The addition of steel fibers to concrete can significantly improve its resistance to shear failure. According to several sources [14][15][16][17], the inclusion of fibers in concrete can greatly enhance its behavior after cracking and modify its tensile strength. The addition of steel fibers has been found to significantly affect various properties of concrete members, such as resistance to deformation and cracking, as well as ultimate flexural strength, ductility, toughness, and shear capacity [18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Shear Strength Prediction of Steel-Fiber-Reinforced Concrete Beams Using the M5P Model

Al-Abdaly

Hussein

Imran³

et al. 2023

Fibers

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This article presents a mathematical model developed using the M5P tree to predict the shear strength of steel-fiber-reinforced concrete (SFRC) for slender beams using soft computing techniques. This method is becoming increasingly popular for addressing complex technical problems. Other approaches, such as semi-empirical equations, can show known inaccuracies, and some soft computing methods may not produce predictive equations. The model was trained and tested using 332 samples from an experimental database found in the previous literature, and it takes into account independent variables such as the effective depth d, beam width bw, longitudinal reinforcement ratio ρ, concrete compressive strength fc, shear span to effective depth ratio a/d, and steel fiber factor Fsf. The predictive performance of the proposed M5P-based model was also compared with the one of existing models proposed in the previous literature. The evaluation revealed that the M5P-based model provided a more consistent and accurate prediction of the actual strength compared to the existing models, achieving an R2 value of 0.969 and an RMSE value of 37.307 for the testing dataset. It was found to be a reliable and also straightforward model. The proposed model is likely to be highly helpful in assessing the shear capacity of SFRC beams during the pre-planning and pre-design stages and could also be useful to help for future revisions of design standards.

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“…According to Muhammed et al. [ 44 ], the experimental investigation for the effect of fiber type and content on the flexural behavior of high strength concrete beams shows that increasing in reinforcement ratio resulted dropping of cracking to ultimate moment ratio. In addition, the higher dosage of steel and short carbon fiber resulted in lesser structural ductility of reinforced concrete beams for constant reinforcement ratios.…”

Section: Introductionmentioning

confidence: 99%

The effect of reinforcement ratio on the flexural performance of alkali-activated fly ash-based geopolymer concrete beam

Zerfu¹,

Ekaputri²

2022

Heliyon

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Effect of fiber type and content on the flexural behavior of high strength concrete beams with low reinforcement ratios

Cited by 27 publications

References 27 publications

Impact of Polypropylene, Steel, and PVA Fibre Reinforcement on Geopolymer Composite Creep and Shrinkage Deformations

Impact of Polypropylene, Steel, and PVA Fibre Reinforcement on Geopolymer Composite Creep and Shrinkage Deformations

Shear Strength Prediction of Steel-Fiber-Reinforced Concrete Beams Using the M5P Model

The effect of reinforcement ratio on the flexural performance of alkali-activated fly ash-based geopolymer concrete beam

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