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Academic literature on the topic 'Basalt rebar. Ductility'
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Journal articles on the topic "Basalt rebar. Ductility"
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Biradar, Sangmesh V., Abhay Mugutkar, T. Vijaya Gowri, and S. J. Shivaraj. "Investigation of the Performance of Basalt Rebar’s as Reinforcement in Concrete Beam." Journal of Physics: Conference Series 2779, no. 1 (2024): 012005. http://dx.doi.org/10.1088/1742-6596/2779/1/012005.
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Abstract Now a day’s concrete is the main component in the construction. The tensile strength, ductility, and crack resistance of plain concrete are low. Fiber rebar reinforcing material possesses high tensile strength, non-corrosive, thermally resistant, alkaline resistant, and is cost-effective, making it a good material for concrete reinforcement. The basalt rebar is the new virgin material with enhanced the characteristics and strength. In this paper mechanical properties of basalt rebar, flexural performance of concrete beams reinforced by varying the ratio of flexural reinforcement such as 0.2%, 0.4% and 0.6% of basalt rebar compared to reinforced with steel and also ductility of beams was studied. The results showed that deformations of concrete beams with basalt rebar have three to four time more than the beams with steel. The characteristic of flexibility in the RC beams caused the difference to drop to 40% at the last stage of loading. Theoretical moment capacity is calculated by using IS 456:2000, at 0.4% reinforcement, the experimental and theoretical moment capacity of S3 and BR3 are nearly same. But in 0.2% and 0.6% of reinforcement for conventional and basalt RC beams varies. By increases the percentage of reinforcement in basalt reinforced concrete beams with increased in ductility of the beam and also deformation.
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Ayush, R.K., K. Sujith, Patil Abhishek, H.R. Varshith, and A. Hosur Vinayak. "Experimental Investigation on Use of Basalt as Alternative Reinforcement in Two Way Slab – A Review." Journal of Building Construction 6, no. 1 (2024): 24–28. https://doi.org/10.5281/zenodo.10841802.
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<em>This study assesses the impact of basalt Fiber -reinforced concrete on exterior beam-column joint performance under cyclic loading. Basalt Fiber, known for superior efficiency, was used, with varied percentages (0.75%, 1%, and 1.25%) in high-performance M60 grade concrete. Mechanical tests evaluated properties, while ductile detailing enhanced energy absorption. Findings show improved joint performance, reduced crack sizes with Fiber inclusion, and increased strength under cyclic loading. This study researches huge scope two-way substantial chunks built up with Fiber-Supported Polymer (FRP) rebars, straightforwardly contrasting their presentation with regular steel-built up concrete. Assessing Carbon FRP (CFRP) and Basalt FRP (BFRP) as steel alternatives, the results indicate CFRP-RC and BFRP-RC slabs had around 7% and 4% higher cracking moment capacities than steel- RC slabs. Distinct Behaviour was observed: BFRP-RC slabs displayed gradual load decline after the peak, while CFRP-RC slabs exhibited a sudden drop akin to steel-RC slabs. Notably, BFRP-RC slabs showcased 1.72 times higher ductility than CFRP-RC slabs. While steel-RC slabs failed due to flexural bending, FRP-RC slabs resisted bending but failed due to punching shear, with steel rebar yielding during failure while FRP rebars did not rupture. Validation against ACI standards was conducted for predictive accuracy on CFRP or BFRP reinforced slabs.</em>
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Zhao, Yajun, Yimiao Huang, Haiyang Du, and Guowei Ma. "Flexural behaviour of reinforced concrete beams strengthened with pre-stressed and near surface mounted steel–basalt-fibre composite bars." Advances in Structural Engineering 23, no. 6 (2019): 1154–67. http://dx.doi.org/10.1177/1369433219891595.
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Fibre-reinforced polymer bars have been widely used for strengthening concrete members due to their high strength, light weight and strong corrosion resistance. A near-surface mounted strengthening system has been adopted to protect the fibre-reinforced polymer bars from external hazards. To make up the lower stiffness and ductility of fibre-reinforced polymer bar compared to steel rebar, this study proposed to use a pre-stressed near-surface mounted steel–basalt-fibre-reinforced polymer composite bar. The steel–basalt-fibre-reinforced polymer composite bar is manufactured through wrapping a steel rod by a basalt-fibre-reinforced polymer cover. A total of nine reinforced concrete beams, including one control or calibration and eight others strengthened by pre-stressed near-surface mounted steel–basalt-fibre-reinforced polymer composite bars, are fabricated and tested. Results show that the proposed steel–basalt-fibre-reinforced polymer composite bar strengthening method can improve both the strength and ductility of the reinforced concrete beams. Pre-stressing of the steel–basalt-fibre-reinforced polymer composite bars further increases substantially the beams’ load-carrying capacity by restraining crack propagation in concrete. Standard-based load analysis correctly predicts the cracking load, however, underestimates the ultimate strength of the beams. Finite element method modelling is conducted to provide a more effective load-carrying capacity prediction and a case study is carried out with regard to the amount of the strengthening steel–basalt-fibre-reinforced polymer composite bars.
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Sujeet, Patil, and Rajendrakumar Harsoor Dr. "Studies on Strength Properties of RC Beam Column joint With Basalt Reinforcement." Engineering and Technology Journal 9, no. 12 (2024): 5579–87. https://doi.org/10.5281/zenodo.14274770.
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In recent earthquakes it Is observed that the beam column joint is more exposed to lateral loads due to which the joints undergoes severe deformations leading to yielding of the joints and the overall structure. . Poor design practices for beam-column joints are compounded by the high demand imposed by adjacent flexural members (beams and columns) as they mobilize their inelastic capabilities to dissipate load energy. Unsafe design and details in the joint region put the entire structure at risk, even if other structural elements meet the design requirements. Therefore the new material that is basalt rebar is used as reinforcement to observe the structural behaviour of the beam column joint. The experiment is conducted and the results are taken. The comparative study is done by using both steel specimens and basalt reinforced specimens. The detailing is done as per the seismic codes. The results are tabulated and graph is plotted.
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Mirdarsoltany, Mohammadamin, Farid Abed, Reza Homayoonmehr, and Seyed Vahid Alavi Nezhad Khalil Abad. "A Comprehensive Review of the Effects of Different Simulated Environmental Conditions and Hybridization Processes on the Mechanical Behavior of Different FRP Bars." Sustainability 14, no. 14 (2022): 8834. http://dx.doi.org/10.3390/su14148834.
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When it comes to sustainability, steel rebar corrosion has always been a big issue, especially when they are exposed to harsh environmental conditions, such as marine and coastal environments. Moreover, the steel industry is to blame for being one of the largest producers of carbon in the world. To supplant this material, utilizing fiber-reinforced polymer (FRP) and hybrid FRP bars as a reinforcement in concrete elements is proposed because of their appropriate mechanical behavior, such as their durability, high tensile strength, high-temperature resistance, and lightweight-to-strength ratio. This method not only improves the long performance of reinforced concrete (RC) elements but also plays an important role in achieving sustainability, thus reducing the maintenance costs of concrete structures. On the other hand, FRP bars do not show ductility under tensile force. This negative aspect of FRP bars causes a sudden failure in RC structures, acting as a stumbling block to the widespread use of these bars in RC elements. This research, at first, discusses the effects of different environmental solutions, such as alkaline, seawater, acid, salt, and tap water on the tensile and bonding behavior of different fiber-reinforced polymer (FRP) bars, ranging from glass fiber-reinforced polymer (GFRP) bars, and basalt fiber-reinforced polymer (BFRP) bars, to carbon fiber-reinforced polymer (CFRP) bars, and aramid fiber-reinforced polymer (AFRP) bars. Furthermore, the influence of the hybridization process on the ductility, tensile, and elastic modulus of FRP bars is explored. The study showed that the hybridization process improves the tensile strength of FRP bars by up to 224% and decreases their elastic modulus by up to 73%. Finally, future directions on FRP and hybrid FRP bars are recommended.
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Kadhim, Asaad M. H., Hesham A. Numan, and Mustafa Özakça. "Flexural Strengthening and Rehabilitation of Reinforced Concrete Beam Using BFRP Composites: Finite Element Approach." Advances in Civil Engineering 2019 (March 4, 2019): 1–17. http://dx.doi.org/10.1155/2019/4981750.
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Basalt fiber-reinforced polymer (BFRP) is adopted widely in recent years in many countries to rehabilitate or strengthen structural elements such as reinforced concrete (RC) beams because it is cheap and it has stellar mechanical performance. By activating the finite element (FE) simulation, the present research submits an extensive study on the strengthening and rehabilitation of damaged full-scale RC beams due to corrosions in the main reinforcement caused by BFRP sheets. Different parameters were taken into consideration such as corrosion grade, BFRP wrapping schemes, and the number of layers. The flexural performance of the models that build up as the control model and the damaged and the repaired methodologies by BFRP that are adopted and tested by others under the effects of four-point static loadings were also underwent examination. The full interaction at BFRP-concrete interface and the full bonding between sheets presupposed were investigated for all models. The numerical analysis findings were compared with the experimental measurements and found to be in good agreement. The current numerical analysis proved that the ultimate load rised by 14.8% in spite of 20% corrosion in the flexural steel rebar under eight layers of BFRP composite and bottom wrapping mode. In addition, under all strategies of wrapping schemes, the findings also indicated that the deflection ductility index noticeably reduced for RC beams with BFRP composites compared to the control beam. Finally, all the results of midspan deflection, crack patterns, and strain response of the composite system were analysed and discussed briefly.
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Galishnikova, Vera V., Alireza Heidari, Paschal C. Chiadighikaobi, Adegoke Adedapo Muritala, and Dafe Aniekan Emiri. "Ductility and flexure of lightweight expanded clay basalt fiber reinforced concrete slab." Structural Mechanics of Engineering Constructions and Buildings 17, no. 1 (2021): 74–81. http://dx.doi.org/10.22363/1815-5235-2021-17-1-74-81.
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Relevance. The load on a reinforced concrete slab with high strength lightweight aggregate concrete leads to increased brittleness and contributes to large deflection or flexure of slabs. The addition of fibers to the concrete mix can improve its mechanical properties including flexure, deformation, toughness, ductility, and cracks. The aims of this work are to investigate the flexure and ductility of lightweight expanded clay concrete slabs reinforced with basalt fiber polymers, and to check the effects of basalt fiber mesh on the ductility and flexure. Methods. The ductility and flexural/deflection tests were done on nine engineered cementitious composite (expanded clay concrete) slabs with dimensions length 1500 mm, width 500 mm, thickness 65 mm. These nine slabs are divided in three reinforcement methods types: three lightweight expanded clay concrete slab reinforced with basalt rebars 10 mm (first slab type); three lightweight expanded clay concrete slab reinforced with basalt rebars 10 mm plus dispersed chopped basalt fiber plus basalt fiber polymer (mesh) of cells 2525 mm (second slab type); three lightweight expanded clay concrete slab reinforced with basalt rebars 10 mm plus dispersed basalt fiber of length 20 mm, diameter 15 m (third slab type). The results obtained showed physical deflection of the three types of slab with cracks. The maximum flexural load for first slab type is 16.2 KN with 8,075 mm deflection, second slab type is 24.7 KN with 17,26 mm deflection and third slab type 3 is 32 KN with 15,29 mm deflection. The ductility of the concrete slab improved with the addition of dispersed chopped basalt fiber and basalt mesh.
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Saikrishna, V., V. Srinivasa Reddy, M. V. Seshagiri Rao, and S. Shrihari. "Moment - curvature behavior of basalt fibred concrete beams made with basalt fibre reinforced polymer bars." E3S Web of Conferences 309 (2021): 01059. http://dx.doi.org/10.1051/e3sconf/202130901059.
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In the current study the moment - curvature behavior of basalt fibred concrete beams made with basalt fibre reinforced polymer bars and normal beams with steel rebars are evaluated. Basalt fibred reinforced concrete beams of M30 grade were casted with steel and BFRP rebars separately to study the flexural properties of basalt fibre and BFRP bars. From the load –deflection plots, flexural characteristics such as load at first crack, ultimate flexural strength, deflection at the centre and crack width at failure are evaluated. Deflections were measured at the central point and under the load using the deflection meters. The values of moments and curvatures are obtained. Moment curvature relationships are very important to assess out ductility of the structure and the amount of possible redistribution of stresses. The deformations measured are divided by the gauge length (200mm) to obtain the strains at the particular level. From the top and bottom strains, the average curvatures were calculated. From these results, M-Ф diagrams are plotted.
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Ajay Kumar, K., A. Venkat Sai Krishna, S. Shrihari, and V. Srinivasa Reddy. "Studies on stress-strain behaviour of concrete mixes confined with BFRP rebars." E3S Web of Conferences 309 (2021): 01049. http://dx.doi.org/10.1051/e3sconf/202130901049.
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In the present study, the stress-stain behaviour of confined concrete made with basalt fibre reinforced polymer bars (BFRP) were taken up. The stress-strain behaviour was studied for the concrete mixes confined with steel rebars and BFRP rebars. The confinement was given in the form of steel hoops in the cylinders, 3 hoops (0.8%), 4 hoops (1.1%), 5 hoops (1.3%) and 6 hoops (1.6%). The addition of basalt fibres along with confinement of concrete with steel and BFRP hoops enhanced the compressive strength, indicating further confinement effect in the concrete. It is observed that the addition of fibres is helpful in lower confinements only. Beyond 1.1% confinement, the addition of any type of basalt fibres doesn’t show any effect on compressive strengths. From the stress-strain behaviour of all types of concrete mixes, it is concluded that the ultimate load-carrying capacity and strains at peak stresses are more in concrete with BFRP hoops for mixes up to 1.1% confinement. The addition of basalt fibres to concrete has increased the ductility in both confined and unconfined states
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Shill, Sukanta Kumer, Estela O. Garcez, Riyadh Al-Ameri, and Mahbube Subhani. "Performance of Two-Way Concrete Slabs Reinforced with Basalt and Carbon FRP Rebars." Journal of Composites Science 6, no. 3 (2022): 74. http://dx.doi.org/10.3390/jcs6030074.
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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.
Conference papers on the topic "Basalt rebar. Ductility"
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P. S, Binsha, and Vinu M. "Experimental Analysis of Concrete Beams Reinforced With Basalt Fiber Reinforced Polymer Composite Rebars by ANSYS." In The International Conference on scientific innovations in Science, Technology, and Management. International Journal of Advanced Trends in Engineering and Management, 2023. http://dx.doi.org/10.59544/gkwm6644/ngcesi23p7.
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The use of Basalt Fiber Reinforced Polymer Rebar (BFRP) in place of steel rods in concrete structures plays a significant role due to non-corrosive nature. These materials have higher strength than steel but exhibit linear stress-strain response up to failure. Furthermore, the modulus of elasticity of Basalt Fiber Reinforced Polymer is significantly lower than that of steel. The present study focuses on gaining an insight into behavior of the concrete beams reinforced with Basalt Fiber Reinforced Polymer bars subjected to two point loading system by varying the grade of the concrete and diameter of the bar. Experiment will be undertaken until failure to fully understand the influence of parameters on the flexural behavior of concrete beams reinforced with Basalt Fiber Reinforced Polymer rebars and the experimental observation includes failure mode, crack pattern, ultimate failure load, load deflection behaviour and ductility. The comparisons between the flexural capacity of Basalt Fiber Reinforced beam sand steel beams from theoretical and experimental analysis are done. The structural behavior of Basalt Fiber Reinforced Polymer beam is validated by developing finite element models using ANSYS Software.
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Abushanab, Abdelrahman Hamdi, and Wael I. Alnahhal. "Parametric Study on Moment Redistribution of Fiber Reinforced Concrete Continuous Beams with Basalt FRP Bars." In Qatar University Annual Research Forum & Exhibition. Qatar University Press, 2020. http://dx.doi.org/10.29117/quarfe.2020.0084.
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The state of Qatar is suffering from its harsh environment and coastal conditions, which stand for most of the year. As a result, steel-reinforced concrete structures are subjected to rapid corrosion and deterioration. Therefore, there is a necessity to replace the conventional steel reinforcement by fiber-reinforced polymers (FRP) bars. Apart from FRP bars corrosion resistance, their strength to weight ratio is higher than steel reinforcement, which made the FRP, bars a viable alternative to steel reinforcement. Continuous concrete beams are commonly used elements in structures such as parking garages and overpasses. In such structures, forces could be distributed between the critical sections after cracking. This phenomenon is called moment redistribution. It reduces the congested rebars in connections and enhances the ductility of the members. However, the linear-elastic behaviour of FRP materials makes the ability of continuous beams to redistribute loads and moments questionable. This study aims to investigate the capability of moment redistribution of basalt fiber reinforced concrete (BFRC) continuous beams reinforced with basalt FRP (BFRP) bars. Eleven reinforced concrete (RC) continuous beams of 200 x 300 x 4000 mm were tested up to failure under fivepoint loading. The main investigated parameters were the reinforcement ratio (0.6rb, 1.0rb, 1.8rb and 2.8rb; where rb is the balanced reinforcement ratio), stirrups spacing (80 and 120 mm) and volume fractions of Basalt-macro fibers (BMF) (0.75 and 1.5%). A parametric study was then conducted using a validated finite element (FE) model to extend the investigated parameters that may affect the moment redistribution of RC continuous beams. It was concluded that moment redistribution occurs in beams that have at least a ratio of bottom to top reinforcement of 0.3.
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Abushanab, Abdulrahman Hamdi, and Wael I. Alnahhal. "Parametric Study on Moment Redistribution of Fiber Reinforced Concrete Continuous Beams with Basalt FRP Bars." In Qatar University Annual Research Forum & Exhibition. Qatar University Press, 2021. http://dx.doi.org/10.29117/quarfe.2021.0050.
Full textAbstract:
The state of Qatar bears harsh environment and coastal conditions which stand for most of the year. As a result, steel-reinforced concrete structures are subjected to rapid corrosion and deterioration. Therefore, there is a necessity to replace the conventional steel reinforcement by fiber-reinforced polymers (FRP) bars. Apart from FRP bars’ corrosion resistance, their strength to weight ratio is higher than steel reinforcement which makes the FRP bars a viable alternative to steel reinforcement. Continuous concrete beams are commonly used elements in structures such as parking garages and overpasses. In such structures, forces could be distributed between the critical sections after cracking. This phenomenon is called moment redistribution. It reduces the congested rebars in connections and enhances the ductility of the members. However, the linear-elastic behavior of FRP materials makes the ability of continuous beams to redistribute loads and moments questionable. This study aims to investigate the capability of moment redistribution of basalt fiber reinforced concrete (BFRC) continuous beams reinforced with basalt FRP (BFRP) bars. Ten reinforced concrete (RC) continuous beams of 200 x 300 x 4000 mm were tested up to failure under five-point loading. The main investigated parameters were the reinforcement ratio (0.6rb, 1.0rb, 1.8rb and 2.8rb; where rb is the balanced reinforcement ratio), stirrups spacing (80 and 120 mm) and volume fractions of Basalt-macro fibers (BMF) (0.75 and 1.5%). A parametric study was then conducted using a validated finite element (FE) model to extend the investigated parameters that may affect the moment redistribution of RC continuous beams. It was concluded that moment redistribution occurs in beams that have at least a ratio of bottom to top reinforcement of 0.3.