Nano concrete aggregation with steel fibers: A problem to enhance the tensile strength of concrete

Ngo, Van Thuc; Lam, Thanh Quang Khai; Dung, Thi My; Nguyen, Truong An

doi:10.1051/e3sconf/201913503001

Cited by 15 publications

(3 citation statements)

References 5 publications

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“…Adding nano-fumed silica improves microstructures and enhances pozzolanic reactions that lead to form early strength of concrete. When using 10 % nano-fumed silica, the concrete mixture has a lumping phenomenon that leads to the strength of the concrete being reduced [23]. Fig.…”

Section: Civil and Environmental Engineeringmentioning

confidence: 99%

Experimental Comparison of Fibers and Nanomaterials in Compression Test and Cost of High Strength Concrete in Egypt

Al-Hamad

Ragab

El-Attar

et al. 2022

Civil and Environmental Engineering

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The present work addresses conducting an experimental comparison between different types and dosages of fibers and nanomaterials in compressive tests and the cost of mixes for high-strength concrete (HSC). This study investigated the materials used in the construction sector in Egypt. The experimental work was carried out to select the optimum percentage of each type of the used nanomaterials, and fibers to achieve the highest compressive strength and low cost. In this work, nineteen concrete mixes were prepared. Nano silica (NS) and nano clay (NC) were used at 0, 1, 2, and 3 % by weight of cement. Also, nano- fumed silica (FS) was used at 0, 1, 2, 3, 5, and 10 %, while silica fume (SF) was used at 10 % by weight of cement. Each type of corrugated round steel fiber (STF), and polypropylene fibers (PPF) were used at 0.5, 0.75, and 1.00 % by concrete volume. The results indicated that the compressive strength of the HSC increases as the percentage of adding nano-fumed silica increases up to 3 % and the economic feasibility of nano-fumed silica in concrete is better than in other nanomaterials such as nano silica and nano clay. Also, using 1 % steel fiber in HSC increases concrete strength significantly compared to conventional concrete without considerably increasing the cost.

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Section: Civil and Environmental Engineeringmentioning

confidence: 99%

Experimental Comparison of Fibers and Nanomaterials in Compression Test and Cost of High Strength Concrete in Egypt

Al-Hamad

Ragab

El-Attar

et al. 2022

Civil and Environmental Engineering

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“…Their aims were to enhance the tensile strength and plasticity of nano-concrete containing SFs. Consequently, these researchers have examined the impact of nanosilica on high-performance concrete that incorporates SFs [1,2].…”

Section: Introductionmentioning

confidence: 99%

Initial factors impacting vertical displacement, stresses, and propagation of cracks in three-layered steel fiber concrete beams

Lam

2024

2576-8484

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The main aim of the study is to examine the input parameters of three-layered steel fiber concrete beams. Bending RC beams is studied by many different scientists. Multilayer RC beams using SF concrete are one way. In high compressive and tensile stress zones, this method improves beam load strength and reduces cracks. The main goal is to decrease beam stress. Repairing broken three-layered SF-reinforced concrete beams by adding more concrete on top or below the current layer is a benefit. Modifying input parameters during three-layered beam design greatly affects beam efficacy. In this paper, the authors conducted a study using ANSYS simulation and nonlinear material analysis. The objective was to investigate the behavior of three-layered bending RC beams subjected to two concentrated loads. Specifically, the study examined the impact of varying the content of SF in the RC, as well as the effects of stirrup at the ends of the beams. Furthermore, the study explored the influence of changes in the quantity and size of steel bars in the region of tensile strength, along with the effect of varying the SF concrete layer's thickness. The survey results on three-layered beams were used to create diagrams that depict the relationship between load and vertical displacement and load and stress area. These diagrams also help determine the initiation and progression of cracks in three-layered beams, starting from the application of load until the beams become damaged. Ultimately, this information allowed us to identify the specific load level that caused the beams to crack and become damaged.

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“…Steel fber concrete is used quite commonly because they have increased load capacity, reduced the number of cracks, increased construction life, and have good impact resistance. A few studies on nanoconcrete with steel fbers (SFs) looked into the efects of concrete aggregation on increasing concrete tensile strength [1], the enhanced plasticity of concrete with SFs [2], and an observation design was also carried out to consider nanosilica efects on HPC strength at an early age [3], the fracture features of SFs' reinforced concrete beams [4]. A number of scholars have started referring to a series of studies on the RC beams with and without SFs; these studies have constructed a stress strain of the reinforced concrete (RC) beams with SF contents in concrete of 0%, 4%, and 8% by volume.…”

Section: Introductionmentioning

confidence: 99%

The Behavior of RC Beams Strengthened with Steel Fiber Concrete Layer by ANSYS Simulation

Lam¹,

Dung²

2023

Advances in Civil Engineering

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In this study, a double-layer reinforced concrete beam structure was created for the purpose of repairing reinforced concrete beams by pouring a layer of concrete on top of the reinforced concrete beam and then adding fibers to the concrete. Take into consideration the bearing capacity of these double-layer concrete beams as well as the effects that the input parameters have on the stress strain, the propagation of cracks in reinforced concrete beams. The study looks at double-layered reinforced concrete beams, with the steel fiber concrete placed on top of the one containing the normal concrete. This investigation led to the following relationships: load-compressive stress, tensile stress, and vertical displacement at the midpoint of the beam span, as well as a diagram showing how cracks spread in the beams. After getting the experimental results and comparing them with an ANSYS simulation, the diagram was used to figure out the loads at which the beams start to look cracked and the loads at which the beams are damaged. This study investigated the following six cases: how the addition of SFs affects the properties of concrete, the spacing of the stirrups at the ends of the beam should be looked into to see what effects it might have, how the number of tensile steel bars in the beam affects its properties, how the diameter of tensile steel bars affects their properties, how the diameter of compressed steel bars affects the results, and how the thickness of the SFC layer affects the properties of the material. Also, the things that were mentioned would have a big effect on how these double-layer beams in the design work.

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Nano concrete aggregation with steel fibers: A problem to enhance the tensile strength of concrete

Cited by 15 publications

References 5 publications

Experimental Comparison of Fibers and Nanomaterials in Compression Test and Cost of High Strength Concrete in Egypt

Experimental Comparison of Fibers and Nanomaterials in Compression Test and Cost of High Strength Concrete in Egypt

Initial factors impacting vertical displacement, stresses, and propagation of cracks in three-layered steel fiber concrete beams

The Behavior of RC Beams Strengthened with Steel Fiber Concrete Layer by ANSYS Simulation

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