Flexural behavior of HSC one way slabs reinforced with basalt FRP bars

Erfan, Abeer M.; El-Naby, R. M. Abd; Badr, Abdel Aziz; El-Sayed, Taha A.

doi:10.1016/j.cscm.2021.e00513

Cited by 10 publications

(8 citation statements)

References 25 publications

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“…Slabs S2 and S3 increased the ultimate load by 115.78% and 116.03% compared to S1. Therefore, it can be concluded that the increase in fiber reinforcing causes a noticeable increase in the ultimate load and ultimate displacement, which agrees with Erfan et al & Roesler et al [ 67 , 68 ]. In slabs S4 and S5, the ultimate load increased by 227.17% and 205.41%, respectively.…”

Section: Resultssupporting

confidence: 89%

Performance of Porous Slabs Using Recycled Ash

El-Sayed

2021

Polymers

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Permeable concrete is an environmentally friendly material that improves water permeability and slip resistance. The manuscript describes a new study aimed at improving the strength of permeable concrete obtained using local materials for the partial replacement of cement with rice and wheat straw ash due to the high amount of silica and pozzolanic characteristics present in the ash. For this purpose, nine concrete mixes were made (Phase I). The mixes were classified into four groups: Group A, with cement/aggregate ratios of 0.23, 0.34, and 0.44 for Mixes 1, 2, and 3, respectively; Group B, with sand added at 10% and 15% to the coarse aggregate for Mixes 4 and 5; Group C, with rice straw ash replacement ratios of 10% and 15% in the cement for Mixes 6 and 7; and, finally, Group D with wheat straw ash replacement ratios of 10% and 15% in the cement for Mixes 8 and 9. For Groups B to D, the water/binder ratio was 0.238. Fresh and hardened concrete tests were conducted. The results showed that Mixes C and D, which contained rice and wheat straw ash, increased the compaction factor due to their spherical shape and higher surface area compared with traditional pervious concrete. Additionally, permeability and porosity increased slightly for the mixes using rice and wheat straw ash. This could be attributed to increasing the interconnected voids. Optimum porosity was reached with 15% rice straw ash. The optimum mix design from Phase I was used in Phase II. Therefore, six pervious concrete slabs, reinforced with different types of reinforcement, were tested under flexural load. With the help of ANSYS, a finite element model was created to verify the results of experiments. The results of the numerical simulation are consistent with the results of the experiment. This article represents a definite step to new knowledge in the field of research of permeable concrete obtained using the partial replacement of cement with rice and wheat straw ash. Hence, this form of concrete can be used for parking lot paving, sludge beds for sewage plants, swimming pool surfaces, bridge walkways, zoo area floors, and animal barns. This concrete can also be used in applications requiring lightweight concrete.

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Section: Resultssupporting

confidence: 89%

Performance of Porous Slabs Using Recycled Ash

El-Sayed

2021

Polymers

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“…Innovation of fibrereinforced polymer (FRP) rebars led the construction industry a step ahead to find the solution to the problem at a lower cost. Recently, numerous studies reported that FRP rebars were found to be one of the promising alternatives to conventional steel rebars to reinforce concrete structures because of their excellent corrosion resistance, tensile strength, and lightweight [1,[7][8][9][10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Performance of Two-Way Concrete Slabs Reinforced with Basalt and Carbon FRP Rebars

et al. 2022

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Fibre-reinforced polymer (FRP) rebars are being increasingly used to reinforce concrete structures that require long-term resistance to a corrosive environment. This study presents structural performance of large scale two-way concrete slabs reinforced with FRP rebars, and their performances were compared against conventional steel reinforced concrete. Both carbon FRP (CFRP) and basalt FRP (BFRP) were considered as steel replacement. Experimental results showed that the CFRP- and BFRP-RC slabs had approximately 7% and 4% higher cracking moment capacities than the steel-RC slab, respectively. The BFRP-RC slabs experienced a gradual decrease in the load capacity beyond the peak load, whereas the CFRP-RC slabs underwent a sharp decrease in load capacity, similar to the steel-RC slab. The BFRP-RC slabs demonstrated 1.72 times higher ductility than CFRP-RC slabs. The steel-RC slab was found to be safe against punching shear but failed due to flexural bending moment. The FRP-RC slabs were adequately safe against bending moment but failed due to punching shear. At failure load, the steel rebars were found to be yielded; however, the FRP rebars were not ruptured. FRP-RC slabs experienced a higher number of cracks and higher deflection compared to the steel-RC slab. However, FRP-RC slabs exhibited elastic recovery while unloading. Elastic recovery was not observed in the steel-RC slab. Additionally, the analytical load carrying capacity was validated against experimental values to investigate the efficacy of the current available standards (ACI 318-14 and ACI 440.1R-15) to predict the capacity of a two-way slab reinforced with CFRP or BFRP. The experimental load capacity of the CFRP-RC slabs was found to be approximately 1.20 times higher than the theoretical ultimate load capacity. However, the experimental load capacity of the BFRP-RC slabs was 6% lower than their theoretical ultimate load capacity.

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“…The predicted characteristics of the stress-strain state of reinforced concrete columns under cyclic compression significantly improved compared to other existing model features. Erfan et al investigated the flexural characteristics of a BFRC slab [22]. Experimental test results showed that the ultimate bending loads and behavior of BFRC slabs improved compared to steel-reinforced concrete slabs.…”

Section: Introductionmentioning

confidence: 99%

Ultimate Compressive Strains and Reserves of Bearing Capacity of Short RC Columns with Basalt Fiber

et al. 2021

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Increasing the bearing capacity of reinforced concrete structures, reducing material consumption, and ensuring quality are critical in modern construction. The article presents an experimental study of the ultimate compressive strains of short fiber basalt reinforced concrete columns and provides recommendations for increasing the bearing capacity using steel reinforcement bars with greater strength. The columns were tested in an upright position using a hydraulic press. Strains were measured with dial indicators and a strain gauge station. It was shown that the addition of 10% coarse basalt fiber increased the ultimate compressibility of concrete on ordinary crushed stone by 19.8%, and expanded clay concrete by 26.1%, which led to the strain hardening of concrete under compression by 9.0% and 12%, respectively. Ultimate compressive strains in fiber-reinforced concrete short columns with combined reinforcement increased 1.42 times in columns on a lightweight aggregate and 1.19 times on heavy aggregate. An increase in the ultimate compressibility of concrete makes it possible to use steel reinforcement with greater strength in compressed elements as the concrete crushing during compression occurs primarily due to the reaching of critical values by tensile stresses in the transverse direction. This makes it possible to manufacture structures with a higher load-bearing capacity and less material consumption. A practical example of the application of the proposed approach is given.

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Flexural behavior of HSC one way slabs reinforced with basalt FRP bars

Cited by 10 publications

References 25 publications

Performance of Porous Slabs Using Recycled Ash

Performance of Porous Slabs Using Recycled Ash

Performance of Two-Way Concrete Slabs Reinforced with Basalt and Carbon FRP Rebars

Ultimate Compressive Strains and Reserves of Bearing Capacity of Short RC Columns with Basalt Fiber

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