Kenaf Fiber Reinforced Polymer Composites for Strengthening RC Beams

Hafizah, Nur; Bhutta, Muhammad Aamer Rafique; Jamaludin, M. Y.; H., Warid M.; Ismail, Mohammad; Rahman, M. S.; Yunus, Ishak; Azman, Mawaddah

doi:10.3151/jact.12.167

Cited by 37 publications

(18 citation statements)

References 7 publications

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“…Various investigations were conducted on kenaf, jute, jute rope fiber as polymer composites for both flexural and shear strengthening [5]. Hafizah et al [17] studied the flexural behaviour of RC beams externally strengthened by kenaf fiber reinforced polymer composites with 50% fiber volume content. The findings revealed that all strengthened beams managed to improve the flexural strength by 40%.…”

Section: Introductionmentioning

confidence: 99%

External strengthening of reinforced concrete beam with opening by bamboo fiber reinforced composites

et al. 2020

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This paper presents the structural behaviour of reinforced concrete (RC) beams with and without openings strengthened externally with bamboo fiber reinforced composite (BFRC) plates in shear and flexure, respectively. Mechanical properties include tensile and flexural strength of epoxy, polyester and vinyl-ester based BFRC plates with 0%, 10%, 20%, 30% and 40% fiber volume fractions were evaluated. A total of fourteen beams were cast to evaluate the structural behaviour of RC beams strengthened with BFRC plates. All the beams were tested to failure under four-point bending. The results presented were in terms of load–deflection behaviour, failure mode and crack pattern. A comparison was also made between the performance of epoxy, polyester and vinyl-ester based BFRC plates in shear strengthening of RC beams with openings. Results revealed that the presence of openings in the shear zone reduced the original beam capacity of the control beam to about 52–55%. Shear strengthening of RC beams with openings using epoxy based BFRC plates showed significant improvement in regaining the beam structural capacity to approximately 32–36% higher than the un-strengthened beams. Meanwhile, strengthening of RC beams in flexure with epoxy based BFRC plates managed to regain the beam original capacity up to 98% of the control beam. Bamboo fiber composite reinforced with epoxy, polyester and vinyl-ester resins of 40% fiber volume fraction managed to regain the beam original capacity up to 82%. It was found that BFRC plates could divert and mitigate the formation of cracks away from the strengthened region as well as improved the beam ductility.

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Section: Introductionmentioning

confidence: 99%

External strengthening of reinforced concrete beam with opening by bamboo fiber reinforced composites

et al. 2020

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“…Kenaf has a high potential to be the reinforcement material for bio-composite production due to its growth rate, and similar structure to jute and cotton which are the mostly used crop for fiber production [42]. Kenaf is an annual crop and its origin is Africa.…”

Section: Kenafmentioning

confidence: 99%

Bio-composite materials: a short review of recent trends, mechanical and chemical properties, and applications

Yıldızhan

Çalık

Özcanlı

et al. 2018

European Mechanical Science

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Recently, the attraction on the bio-composite (known as green composites) materials has significantly increased due to the potential of being substitute to conventional materials used in manufacturing industries. Biocomposite materials are produced with natural fibers or natural resins instead of synthesized fibres (carbon, glass, etc fibers) or resins (poly vinyl alcohol, epoxy, etc resins). The bio-based fibers such as jute, sisal, flax, hemp, bamboo, hair, wool, silk etc., are obtained from plants or animals. Also, natural matrix materials such as natural rubber, polyester, etc., are produced from plants. The advantages of bio-composites such as the ease of disposal and being able to composted characteristics of bio-composites after the expiration date which is not generally possible with conventional synthetic materials, being renewable, sustainable have attracted many researcher. Furthermore, the comparable mechanical properties of bio-composites make feasible for application to many different products. This study reviews the, recent trends, mechanical and chemical properties, and application of bio-composites in recent years.

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“…Some past studies have investigated the use of natural fibers as a composite to strengthen reinforced concrete (RC) beams in flexure and shear [24][25][26][27]. However, studies covering the use of bamboo as a fiber or laminate in strengthening and retrofitting RC concrete beams have not been overly reported.…”

Section: Introductionmentioning

confidence: 99%

Structural Retrofitting of Corroded Reinforced Concrete Beams Using Bamboo Fiber Laminate

Awoyera

Nworgu

Shanmugam³

et al. 2021

Materials

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Corrosion creates a significant degradation mechanism in reinforced concrete (RC) structures, which would require a high cost of maintenance and repair in affected buildings. However, as the cost of repairing corrosion-damaged structures is high, it is therefore pertinent to develop alternative eco-friendly and sustainable methods. In this study, structural retrofitting of corroded reinforced concrete beams was performed using bamboo fiber laminate. Three reinforced normal weight concrete beams were produced, two of which were exposed to laboratory simulated corrosion medium, and the remaining one sample served as control. Upon completion of the corrosion cycle, one of the two corroded beams was retrofitted externally with a prefabricated bamboo fiber laminate by bonding the laminate to the beam surface with the aid of an epoxy resin. The three beams were subjected to loading on a four-point ultimate testing machine, and the loads with corresponding deflections were recorded through the entire load cycle of the beams. Finally, the mass loss of embedded steel reinforcements was determined to measure the effect of corrosion on the beams and the steel. The result showed that corroded beams strengthened with bamboo laminates increase the bearing capacity. Using a single bamboo laminate in the tensile region of the corroded beam increased the ultimate load capacity of the beam up to 21.1% than the corroded beam without retrofit. It was demonstrated in this study that the use of bamboo fiber polymer for strengthening destressed RC beams is a more sustainable approach than the conventional synthetic fibers.

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Kenaf Fiber Reinforced Polymer Composites for Strengthening RC Beams

Cited by 37 publications

References 7 publications

External strengthening of reinforced concrete beam with opening by bamboo fiber reinforced composites

External strengthening of reinforced concrete beam with opening by bamboo fiber reinforced composites

Bio-composite materials: a short review of recent trends, mechanical and chemical properties, and applications

Structural Retrofitting of Corroded Reinforced Concrete Beams Using Bamboo Fiber Laminate

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