Influence of Steel and Polypropylene Fibers Addition on Selected Properties of Fine-Grained Concrete

Denisiewicz, Arkadiusz; Socha, Tomasz; Kula, Krzysztof; Pasula, Marcin

doi:10.2478/ceer-2018-0057

Cited by 3 publications

(3 citation statements)

References 2 publications

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“…Fiber types other than steel, such as polypropylene and polyolefin based on polymer materials, have been recently used in a wide range of research areas. Denisiewicz et al [10] experimentally tested fine-grained fiber concrete's mechanical and physical properties. Concrete prisms and cubes were selected to test with different steel and polypropylene fiber ratios.…”

Section: Introductionmentioning

confidence: 99%

High Strength Concrete Beams Reinforced with Hooked Steel Fibers under Pure Torsion

2022

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A study of the behavior of fibers in high-strength reinforced concrete beams is presented in this paper. Twelve reinforced concrete beams were tested under a pure torsion load. Different compressive strengths (45.2, 64.7, and 84.8 MPa) and fiber volume fractions (0, 0.25, 0.5, and 0.75) with variable spacing between transverse reinforcements have been used. It was discovered that the maximum torque of a high-strength concrete beam is increased by about 20.3, 25.6, and 27.1% when the fractional volume of fiber is increased from 0 to 0.25, 0.5 and 0.75 respectively (when the compressive strength is 45.2 MPa and the transverse reinforcement spacing is 100 mm). The test results show that the ultimate torsional strength becomes higher when the concrete compressive strength increases, and this percentage increase becomes higher with increasing steel fiber volume fraction. When the spacing between transverse reinforcements decreases from 150 to 100 mm, the ultimate torque increases by 19.9%. When the spacing between transverse reinforcements decreases from 100 to 60 mm, the ultimate torque increases by 17.0%. In these beams, the fibers’ compressive strength and volume fraction were kept constant at 45.2 MPa and 0.75, respectively. Doi: 10.28991/CEJ-2022-08-01-07 Full Text: PDF

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Section: Introductionmentioning

confidence: 99%

High Strength Concrete Beams Reinforced with Hooked Steel Fibers under Pure Torsion

2022

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“…Arkadiusz Denisiewicz and Tomasz Socha [14] studied the mechanical and physical properties of fine-grained fiber concrete. Two types of fiber were used: steel fiber and polypropylene fibers.…”

Section: Introductionmentioning

confidence: 99%

Fiber-Type Influence on the Flexural Behavior of RC Two-Way Slabs with an Opening

2022

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Combining fiber with concrete mixes has become essential and its widespread use improves the strength of structural concrete elements. This research conducted an experiment into the structural performance of flat slabs with and without a square opening using four types of fiber (hooked-end, straight, corrugated steel fiber and polyolefin fiber) to gain a better understanding of how the variance of fiber type and shape effects the flexural behaviors of two-way slabs. The test program involved (a) testing the properties of hardened concrete, such as compressive properties, modulus of rupture and splitting tensile strength, and (b) testing the flexural behavior of two-way slabs. Ten slabs were divided into five pairs, including two specimens used as reference specimens (with and without openings), and eight other specimens with different types of fibers. Results revealed that the existing fiber in concrete improved the mechanical properties of hardened concrete mix, and the compressive strength test showed higher improvement in specimens with hooked and straight steel fiber. The flexural behavior of reinforced concrete slab was significantly enhanced, and the flexural strength capacity was especially improved for the slabs strengthened with hooked-end and corrugated steel fiber. Polyolefin fiber showed a slight enhancement of mechanical properties and good improvement in flexural capacity. Generally, the highest increments in compressive strength and modulus of rupture were 24.8%, 20% and 11%, and the ultimate load-carrying capacity of slabs was 39%, 13% and 19% for specimens with steel hooked, steel corrugated and polyolefin fibers, respectively, compared with control specimens.

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“…Publications about the properties of cement-based composites, a name that can be also used for HPC, are concerned in most cases with experimental testing. They contain mainly parametric analysis on the influence of the volumetric fraction of individual components on the HPC response, analysis of different orientations and shape factor of fibres [ 5 , 6 , 7 , 8 , 9 , 10 , 11 ], or analysis of different types and shapes of fibres [ 12 , 13 , 14 , 15 , 16 ]. The material parameters we observe at the macro-scale are a result of phenomena taking place in the microstructure of the material, i.e.…”

Section: Introductionmentioning

confidence: 99%

Influence of Boundary Conditions on Numerical Homogenization of High Performance Concrete

et al. 2021

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Concrete is the most widely used construction material nowadays. We are concerned with the computational modelling and laboratory testing of high-performance concrete (HPC). The idea of HPC is to enhance the functionality and sustainability of normal concrete, especially by its greater ductility as well as higher compressive, tensile, and flexural strengths. In this paper, the influence of three types (linear displacement, uniform traction, and periodic) of boundary conditions used in numerical homogenization on the calculated values of HPC properties is determined and compared with experimental data. We take into account the softening behavior of HPC due to the development of damage (micro-cracks), which finally leads to failure. The results of numerical simulations of the HPC samples were obtained by using the Abaqus package that we supplemented with our in-house finite element method (FEM) computer programs written in Python and the homogenization toolbox Homtools. This has allowed us to better account for the nonlinear response of concrete. In studying the microstructure of HPC, we considered a two-dimensional representative volume element using the finite element method. Because of the random character of the arrangement of concrete’s components, we utilized a stochastic method to generate the representative volume element (RVE) structure. Different constitutive models were used for the components of HPC: quartz sand—linear elastic, steel fibers—ideal elastic-plastic, and cement matrix—concrete damage plasticity. The numerical results obtained are compared with our own experimental data and those from the literature, and a good agreement can be observed.

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Influence of Steel and Polypropylene Fibers Addition on Selected Properties of Fine-Grained Concrete

Cited by 3 publications

References 2 publications

High Strength Concrete Beams Reinforced with Hooked Steel Fibers under Pure Torsion

High Strength Concrete Beams Reinforced with Hooked Steel Fibers under Pure Torsion

Fiber-Type Influence on the Flexural Behavior of RC Two-Way Slabs with an Opening

Influence of Boundary Conditions on Numerical Homogenization of High Performance Concrete

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