FEM evaluation of reinforced concrete beams by hybrid and banana fiber bars (BFB)

Elbehiry, Amgad; Elnawawy, Omar; Kassem, Magdy; Zaher, Amr H.; Mostafa, Marwan

doi:10.1016/j.cscm.2020.e00479

Cited by 25 publications

(10 citation statements)

References 16 publications

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“…Natural fibers, such as fibers of mineral origin like basalt [ 12 , 212 , 225 , 226 ], and fibers of plant origin, like sisal [ 72 , 227 ], as well as banana [ 228 , 229 ], can also be used as reinforcement of HPC and UHPC. Their main advantages are the fact that they are renewable and eco-friendly resources.…”

Section: Hpc and Uhpc Containing Fibers: Composite Materialsmentioning

confidence: 99%

Materials for Production of High and Ultra-High Performance Concrete: Review and Perspective of Possible Novel Materials

Marvila¹,

Azevedo²,

Matos

et al. 2021

Materials

110

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This review article proposes the identification and basic concepts of materials that might be used for the production of high-performance concrete (HPC) and ultra-high-performance concrete (UHPC). Although other reviews have addressed this topic, the present work differs by presenting relevant aspects on possible materials applied in the production of HPC and UHPC. The main innovation of this review article is to identify the perspectives for new materials that can be considered in the production of novel special concretes. After consulting different bibliographic databases, some information related to ordinary Portland cement (OPC), mineral additions, aggregates, and chemical additives used for the production of HPC and UHPC were highlighted. Relevant information on the application of synthetic and natural fibers is also highlighted in association with a cement matrix of HPC and UHPC, forming composites with properties superior to conventional concrete used in civil construction. The article also presents some relevant characteristics for the application of HPC and UHPC produced with alkali-activated cement, an alternative binder to OPC produced through the reaction between two essential components: precursors and activators. Some information about the main types of precursors, subdivided into materials rich in aluminosilicates and rich in calcium, were also highlighted. Finally, suggestions for future work related to the application of HPC and UHPC are highlighted, guiding future research on this topic.

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Section: Hpc and Uhpc Containing Fibers: Composite Materialsmentioning

confidence: 99%

Materials for Production of High and Ultra-High Performance Concrete: Review and Perspective of Possible Novel Materials

Marvila¹,

Azevedo²,

Matos

et al. 2021

Materials

110

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show abstract

“…Its tensile strength is low and short fibers, added as reinforcement, are able to improve the situation, simultaneously strengthening and toughening the material. In the modern construction, a concrete matrix is successfully reinforced with various fibers, applying various materials and methods [12][13][14][15][16][17][18]. Currently, fiber reinforced concrete (FRC) is increasingly used in various structural engineering applications.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation and Modelling of the Layered Concrete with Different Concentration of Short Fibers in the Layers

Lūsis

Kononova

Mačanovskis

et al. 2021

Fibers

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The use of steel fiber reinforced concrete (SFRC) in structures with high physical-mechanical characteristics allows engineers to reduce the weight and costs of the structures, to simplify the technology of their production, to reduce or completely eliminate the manual labor needed for reinforcement, at the same time increasing reliability and durability. Commonly accepted technology is exploiting randomly distributed in the concrete volume fibers with random each fiber orientation. In structural members subjected to bending, major loads are bearing fibers located close to outer member surfaces. The majority of fibers are slightly loaded. The aim of the present research is to create an SFRC construction with non-homogeneously distributed fibers. We prepared layered SFRC prismatic specimens. Each layer had different amount of short fibers. Specimens were tested by four point bending till the rupture. Material fracture process was modelled based on the single fiber pull-out test results. Modelling results were compared with the experimental curves for beams. Predictions generated by the model were validated by 4PBT of 100 × 100 × 400 mm prisms. Investigation had shown higher load-bearing capacity of layered concrete plates comparing with plate having homogeneously distributed the same amount of fibers. This mechanism is strongly dependent on fiber concentration. A high amount of fibers is leading to new failure mechanisms—pull-out of FRC blocks and decrease of load-bearing capacity. Fracture surface analysis was realized for broken prisms with the goal to analyze fracture process and to improve accuracy of the elaborated model. The general conclusion with regard to modelling results is that the agreement with experimental data is good, numeric modelling results successfully align with the experimental data. Modelling has indicated the existence of additional failure processes besides simple fiber pull-out, which could be expected when fiber concentration exceeds the critical value.

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“…Several natural fibers that have been used by humans for centuries possess very high tensile strength and flexibility, e.g., coir, jute, sisal, Musaceae, and hemp, etc. [ 30 , 31 , 32 , 33 , 34 ]. Multiple options for natural fibers are available in many countries, which can be used for FRC development without seriously affecting the carbon footprint of concrete.…”

Section: Introductionmentioning

confidence: 99%

Development of Ductile and Durable High Strength Concrete (HSC) through Interactive Incorporation of Coir Waste and Silica Fume

et al. 2022

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The issue of brittleness and low post-peak load energy associated with the plain HSC led to the development of fiber-reinforced concrete (FRC) by using discrete fiber filaments in the plain matrix. Due to the high environmental impact of industrial fibers and plasticizers, FRC development is ecologically challenged. Sustainability issues demand the application of eco-friendly development of FRC. This study is aimed at the evaluation of coir as a fiber-reinforcement material in HSC, with the incorporation of silica fume as a partial replacement of cement. For this purpose, a total of 12 concrete mixes were produced by using three different doses of coir (0%, 1%, 1.5%, and 2% by wt. of binder) with silica fume (0%, 5%, and 10% as volumetric replacements of cement). The examined parameters include compressive strength, shear strength, splitting tensile strength, ultrasonic pulse velocity, water absorption, and chloride ion permeability. The scanning electron microscopy (SEM) technique was adopted to observe the microstructure of the CF-reinforced concrete. The results revealed that due to the CF addition, the compressive strength of HSC reduces notably; however, the splitting tensile strength and shear strength experienced notable improvements. At the combined incorporation of 1.5% CF with 5% silica fume, the splitting tensile strength and shear strength of the concrete experienced improvements of 47% and 70%, respectively, compared to that of the control mix. The CF incorporation is detrimental to the imperviousness of concrete. The combined incorporation of CF and silica fume is recommended to minimize the negative effects of CF on the permeability resistance of concrete. The SEM results revealed that CF underwent a minor shrinkage with the age.

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FEM evaluation of reinforced concrete beams by hybrid and banana fiber bars (BFB)

Cited by 25 publications

References 16 publications

Materials for Production of High and Ultra-High Performance Concrete: Review and Perspective of Possible Novel Materials

Materials for Production of High and Ultra-High Performance Concrete: Review and Perspective of Possible Novel Materials

Experimental Investigation and Modelling of the Layered Concrete with Different Concentration of Short Fibers in the Layers

Development of Ductile and Durable High Strength Concrete (HSC) through Interactive Incorporation of Coir Waste and Silica Fume

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