Impact Resistance of Styrene–Butadiene Rubber (SBR) Latex-Modified Fiber-Reinforced Concrete: The Role of Aggregate Size

Ashraf, Muhammad Rehan; Akmal, Usman; Khurram, Nauman; Aslam, Fahid; Deifalla, Ahmed Farouk

doi:10.3390/ma15041283

Cited by 17 publications

(12 citation statements)

References 17 publications

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“…Then, structural analysis is performed. The required steel reinforcement is then calculated to enhance the mechanical performance of structural elements such as ductility, tensile strength, and creep resistance [ 2 , 3 , 4 , 5 , 6 , 7 ]. Finally, the ultimate limit state and serviceability limit state requirements provided by design codes are checked [ 8 , 9 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Optimal Design of Reinforced Concrete Materials in Construction

2022

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The structural design process is iterative and involves many design parameters. Thus, this paper presents a controlled framework for selecting the adequate structural floor system for reinforced concrete buildings and efficiently utilizing the corresponding construction materials. Optimization was performed using an evolutionary algorithm to minimize the total construction cost, considering the costs of concrete, steel reinforcement, formwork, and labor. In the problem formulation, the characteristic compressive strength of concrete was treated as a design variable because it affects the mechanical performance of concrete. The design variables included the column spacings, concrete dimensions, and steel reinforcement of different structural components. The constraints reflected the Egyptian code of practice provisions. Because the choice of the structural floor system affects the design details, three systems were considered: solid slabs, flat slabs with drop panels, and flat slabs without drop panels. Two benchmark examples were presented, and the optimal design results of the structural floor systems were compared. The solid slab system had the lowest construction cost among the three structural floor systems. Comparative diagrams were developed to investigate the distribution of construction costs of each floor system. The results revealed that an adequate choice of design variables could save up to 17% of the building’s total construction cost.

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Section: Introductionmentioning

confidence: 99%

Optimal Design of Reinforced Concrete Materials in Construction

2022

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“…In this test, a specific mass is left to drop freely from a specific height and the structural response of the tested element is recorded in terms of impact force, deflection, vibration and possibly strain. Such a type of test is an expensive one and is intended to be performed on moderate- to large-scale test structural elements (beams or slabs), and is a very useful technique to study structural response under the effect of heavy falling objects [ 25 , 26 , 27 , 28 , 29 ]. Another common impact test is the Charpy pendulum test that is used to estimate the effect of impact forces on different sizes of elements that are made of different types of materials [ 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 ].…”

Section: Introductionmentioning

confidence: 99%

“…Such a type of test is an expensive one and is intended to be performed on moderate- to large-scale test structural elements (beams or slabs), and is a very useful technique to study structural response under the effect of heavy falling objects [ 25 , 26 , 27 , 28 , 29 ]. Another common impact test is the Charpy pendulum test that is used to estimate the effect of impact forces on different sizes of elements that are made of different types of materials [ 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 ]. On the other hand, projectile [ 33 , 34 , 35 , 36 , 37 ] and explosive impacts [ 38 , 39 ] are also types of impact forces that are investigated using special, very costly techniques.…”

Section: Introductionmentioning

confidence: 99%

Repeated Impact Response of Normal- and High-Strength Concrete Subjected to Temperatures up to 600 °C

et al. 2022

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With the aim of investigating the response of concrete to the dual effect of accidental fire high temperatures and possible induced impacts due to falling fragmented or burst parts or objects, an experimental work is conducted in this study to explore the influence of exposure to temperatures of 200, 400 and 600 °C on the responses of concrete specimens subjected to impact loads. Cylindrical specimens are tested using the recommended repeated impact procedure of the ACI 544-2R test. Three concrete mixtures with concrete nominal design strengths of 20, 40 and 80 MPa are introduced to represent different levels of concrete strength. From each concrete mixture, 24 cylinders and 12 cubes are prepared to evaluate the residual impact resistance and compressive strength. Six cylindrical specimens and three cubes from each concrete mixture are heated to each of the three levels of high temperatures, while the other six cylinders and three cubes are tested without heating as reference specimens. The test results show that the behavior of impact resistance is completely different from that of compressive strength after exposure to high temperatures; the cylindrical specimens lose more than 80% of the cracking and failure impact resistance after exposure to 200 °C, while impact resistance almost vanishes after exposure to 400 and 600 °C. Concrete compressive strength is found to be effective on the unheated impact specimens, where the higher-strength cylinders retain significantly higher impact numbers. This effect noticeably decreases after exposure to 200 and 400 °C, and vanishes after exposure to 600 °C.

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“…The reinforced concrete (RC) evolution have been an ongoing process with so many advancements (Ahmad et al, 2022;Ahmed et al, 2022;Ali et al, 2022;Ashraf et al, 2022;Ghareeb et al, 2022;Huang et al, 2022;Khan et al, 2022;Li et al, 2022;Mohammed et al, 2022;Shen et al, 2022;Zou et al, 2023a;Zou et al, 2023b). High-strength concrete (HSC), especially that with fiber-RC (FRC) is a versatile form of a concrete mixture with superior performance compared to that of normal RC without fiber reinforcement (Deifalla, 2021a;Deifalla et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Effect of hybrid-fiber- reinforcement on the shear behavior of high-strength-concrete beams

Awad

Tawfik²,

Deifalla³

et al. 2023

Front. Mater.

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The shear behavior of concrete beams is highly affected by the implementation of better performance concrete. Hybrid fibers addition to concrete mixture has proven to improve the performance compared to just using single type of fiber. Thus, in this current study, the shear behavior of hybrid-fiber-reinforced-high-strength-concrete beams was investigated experimentally. In addition, the effect of the span-to-depth ratio and the transverse reinforcement ratio were examined. Results showed that, when .45% of the cement weight is replaced with polypropylene fiber and 7% of the cement weight is replaced with steel fibers, the shear strength of the beam was enhanced by 18% in comparison to the control beam. The Formation and progression of cracks were also better controlled. The behavior of hybrid-polypropylene-steel-fibers-high-strength-concrete beams was observed to be comparable to that of conventional concrete ones as the shear strength increased with the decrease in span to depth ratio or the increase in transverse reinforcing ratio. A non-linear numerical model was developed and validated using the experimental results. The shear capacities of beams were calculated using ACI, which was compared to experimental and numerical results. The ACI’s calculations were conservative when compared with the experimental or numerical results. The coefficient of variance between the ACI and experimental shear capacity results was 4.8%, while it was 9.2% between the ACI and numerical shear capacity results.

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Impact Resistance of Styrene–Butadiene Rubber (SBR) Latex-Modified Fiber-Reinforced Concrete: The Role of Aggregate Size

Cited by 17 publications

References 17 publications

Optimal Design of Reinforced Concrete Materials in Construction

Optimal Design of Reinforced Concrete Materials in Construction

Repeated Impact Response of Normal- and High-Strength Concrete Subjected to Temperatures up to 600 °C

Effect of hybrid-fiber- reinforcement on the shear behavior of high-strength-concrete beams

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