The influence of steel fibres on compressive and tensile strength of ultra high performance concrete: A review

Larsen, Inger Beate; Thorstensen, Rein Terje

doi:10.1016/j.conbuildmat.2020.119459

Cited by 188 publications

(64 citation statements)

References 46 publications

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“…A significant increase in the bending tensile strength of the concrete (compared to the reference concrete) was observed only for the 3.5 kg/m 3 content of polypropylene fibers. Similar results were obtained in research [ 10 , 35 ]. As the addition of steel fibers increases, the bending tensile strength also increases.…”

Section: Results and Analysissupporting

confidence: 92%

“…In the research presented in paper [ 10 ], the results of 22 compressive strength tests were compared. It can be seen that the addition of steel fibers generally improves the compressive strength of concrete.…”

Section: Results and Analysismentioning

confidence: 99%

“…The properties of concrete mainly depend on the ingredients of the concrete mix and the used additives [ 6 , 7 , 8 ]. To prevent early age cracking, the concrete that is used to make floors is frequently modified with the addition of fibers [ 9 , 10 ], which are usually made of steel and polypropylene [ 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Steel and Polypropylene Fibers on the Properties of Horizontally Formed Concrete

Chajec

Sadowski

2020

Materials

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The article presents a comparative analysis of the impact of the addition of steel and polypropylene fibers on the properties of the concrete mixes and hardened concrete used in the concrete floor industry. The behavior of concrete intended for floors is different from conventional structural concrete because it is formed horizontally; until now, the effect of steel and polypropylene fibers on the properties of concrete formed horizontally has not yet been fully understood. Therefore, the aim of this article is to examine this issue and compare the behavior of concrete modified with steel and polypropylene fibers in concrete that is formed horizontally. The following properties of fresh concrete mixes were analyzed: consistency, the content of air-voids, and bulk density. Consequently, the following properties of hardened concrete were analyzed: compressive strength, bending tensile strength, and brittleness. It was confirmed that steel and polypropylene fibers have a different type of effect on the properties of fresh concrete mixes and hardened concrete. Finally, a combined economic and mechanical analysis was performed.

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Section: Results and Analysissupporting

confidence: 92%

Section: Results and Analysismentioning

confidence: 99%

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The Effect of Steel and Polypropylene Fibers on the Properties of Horizontally Formed Concrete

Chajec

Sadowski

2020

Materials

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“…and the distribution state of the fibers inside the concrete (volume ratio, direction, degree of dispersion, etc.) have a decisive effect on flexural or tensile properties [ 73 , 74 , 75 , 76 ], but the difference between these factors could be neglected in this study. Apart from such promotion of the pozzolanic reaction and the change in fiber parameters, the effect of the mixture composition on tensile strength has also been reported.…”

Section: Resultsmentioning

confidence: 99%

Performance Comparison between Densified and Undensified Silica Fume in Ultra-High Performance Fiber-Reinforced Concrete

2020

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Silica fume (SF) is a key ingredient in the production of ultra-high performance fiber-reinforced concrete (UHPFRC). The use of undensified SF may have an advantage in the dispersion efficiency inside cement-based materials, but it also carries a practical burden such as high material costs and fine dust generation in the workplace. This study reports that a high strength of 200 MPa can be achieved by using densified SF in UHPFRC with Portland limestone cement. Additionally, it was experimentally confirmed that there was no difference between densified and undensified SFs in terms of workability, compressive and flexural tensile strengths, and hydration reaction of the concrete, regardless of heat treatment, because of a unique mix proportion as well as mixing method for dispersing agglomerated SF particles. It was experimentally validated that the densified SF can be used for both precast and field casting UHPFRCs with economic and practical benefits and without negative effects on the material performance of the UHPFRC.

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“…The average compressive strength of PE0.0%, PE0.5%, PE1.0%, and PE1.5% was 140.9 MPa, 140.8 MPa, 137.7 MPa, and 131.7 MPa, respectively (Figure 4); all these values fulfill the requirement of the minimum characteristic strength ø 120 MPa as per the Chinese standard for UHPC (T/CBMF37, 2018). Adding steel fibers (Larsen and Thorstensen, 2020;Liu et al, 2020) or replacing polymer fibers by steel fibers (Yu et al, 2019) in concrete generally increase its compressive strength, while the overall influence of polymer fibers on the compressive strength of concrete is delicate: the fibers can lower the matrix compactness (negative effect) but can also bridge the micro-cracks (positive effect) (Bentur and Mindess, 2007). Figure 4 also summarizes the effect of polymer fiber volume content on the compressive strength based on the data from the literature reporting concrete with fiber over 0.5 vol.% (Al-mashhadani et al, 2018;C xavdar, 2014;Choi et al, 2017;Kakooei et al, 2012;Wang et al, 2019Wang et al, , 2020Yu et al, 2020b).…”

Section: Compressive Strengthmentioning

confidence: 99%

Effect of fiber content on mechanical performance and cracking characteristics of ultra-high-performance seawater sea-sand concrete (UHP-SSC)

Huang

Wang

et al. 2020

Advances in Structural Engineering

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Developing seawater sea-sand concrete can address the challenges arising from the lack of freshwater and river/manufactured sand for making concrete on-site for sustainable marine and coastal construction. To eliminate the corrosion risk of steel fibers while maintaining the high ductility of concrete, this study aims to develop a new type of ultra-high-performance seawater sea-sand concrete (UHP-SSC) by using ultra-high-molecular-weight polyethylene fibers. The effect of fiber content (0%, 0.5%, 1.0%, and 1.5% by volume) on the mechanical performance and cracking characteristics of UHP-SSC was experimentally investigated. The results showed that as the fiber content increases, the tensile strength and strain capacity of UHP-SSC significantly increase, while the compressive strength slightly decreases (but still over 130 MPa). The stochastic nature of the crack width was characterized by the Weibull distribution. A probabilistic model was used to model the evolution of the crack width for UHP-SSC at different strain levels. The model showed good agreement with the experimental results, and it can be used to estimate the allowed tensile strain of UHP-SSC in practical applications for a given limit of crack width and cumulative probability. The findings in this study provide insights into the future design of UHP-SSC in marine and coastal applications.

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The influence of steel fibres on compressive and tensile strength of ultra high performance concrete: A review

Cited by 188 publications

References 46 publications

The Effect of Steel and Polypropylene Fibers on the Properties of Horizontally Formed Concrete

The Effect of Steel and Polypropylene Fibers on the Properties of Horizontally Formed Concrete

Performance Comparison between Densified and Undensified Silica Fume in Ultra-High Performance Fiber-Reinforced Concrete

Effect of fiber content on mechanical performance and cracking characteristics of ultra-high-performance seawater sea-sand concrete (UHP-SSC)

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