Strengthening Performance of PALF-Epoxy Composite Plate on Reinforced Concrete Beams

Chin, Siew Choo; Tong, Foo Sheng; Doh, Shu Ing; Gimbun, Jolius; Ong, Huey R.; Serigar, Januar P.

doi:10.1088/1757-899x/318/1/012026

Cited by 12 publications

(4 citation statements)

References 5 publications

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“…As the tension steel in the beam midspan reaches its yield stress and begins to rotate, the steel yielding progresses towards the unstrengthened beam and a crack is formed at the end of the FRP laminate; this is then followed by flexural-shear failure. This failure can be observed in [81] and [82]. The failure modes designated by Cc start to occur from below the tension steel and are characterised by a more abrupt failure.…”

Section: Beam Failure Modesmentioning

confidence: 93%

“…Several fibre treatments have been used to modify this fibre property. Alkaline [71,76,81,82,[92][93][94] and heat [6,89,96,97] were the predominant fibre pre-treatment used. Alam and Riyami [92] pre-treated jute and kenaf fibres with heat NaOH, and though the treatment reduced the water absorption [142] of the developed NFRP laminates, the strengthening effect of the treated NFRP laminates on RC beams was less than the untreated ones.…”

Section: Durability Considerationmentioning

confidence: 99%

See 1 more Smart Citation

Natural fibres and biopolymers in FRP composites for strengthening concrete structures: A mixed review

Nwankwo

Mahachi

Olukanni

et al. 2023

Construction and Building Materials

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Section: Beam Failure Modesmentioning

confidence: 93%

Section: Durability Considerationmentioning

confidence: 99%

Natural fibres and biopolymers in FRP composites for strengthening concrete structures: A mixed review

Nwankwo

Mahachi

Olukanni

et al. 2023

Construction and Building Materials

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“…Bhutta et al [14] tested the structural performance of concrete beams strengthened with natural Kenaf FRP. Chin et al [15] considered pineapple leaf fibre-epoxy composite plates for strengthening reinforced concrete beams. Fibres were alkali-treated to improve their efficiency.…”

Section: Introductionmentioning

confidence: 99%

Natural Jute Fibre‐Reinforced Polymer Composite System for Posttensioned Beam Strengthening in Flexure

Archana

Reddy

Jeevan

et al. 2021

Advances in Materials Science and Engineering

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Existing structures require repair and strengthening owing to degradation caused by incorrect design and construction, environmental impacts, or structural upgradation to meet new seismic design standards or to correct execution problems that occurred during construction. These strengthening requirements can be satisfied by a variety of strengthening techniques. The creation of a fibre-reinforced polymer (FRP) composite system offers a new design method for the strengthening of existing structures. In this study, posttensioned beams are strengthened by using sustainable materials such as natural jute fibre-reinforced polymer (FRP) composites. The performance of these composite systems in the flexural strengthening of posttensioned beams was used to assess their effectiveness. Consequential result for longitudinal reinforcement throughout the length of the beam for flexural strengthening was evaluated. Flexural performance, crack width, ductility, and load-deflection relationship study of control beams (Scheme A) and retrofitted beams (Schemes B and C) under different wrappings were considered in the investigation. An experimental study depicts that using the full wrapping (FW) technique increases the flexural strength of PSC beams wrapped in JFRP by 23% and, by using the strip wrapping (SW) technique, the flexural strength is increased by 10%. The JFRP composite system of strengthening has shown the highest deformability index and showed that the JFRP material has enormous potential as a structural strengthening material.

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“…The aforementioned issue spurs research on the utilization of natural fiber from agricultural plants such as kenaf, jute, sisal as composite material, which is eco-friendly and cost-effective. Recently, various investigations were performed on kenaf fiber [8], jute [9,10], PALF [11] and mengkuang leaves [12] composite to study their mechanical properites as well as their potential as external structural strengthening material. However, the use of bamboo fiber, especially as a bamboo fiber composite plate for structural strengthening is still limited.…”

Section: Introductionmentioning

confidence: 99%

Strengthening of Reinforced Concrete Beams Using Bamboo Fiber/Epoxy Composite Plates in Flexure

Chin

Moh

Doh

et al. 2019

KEM

Self Cite

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Fiber reinforced polymer (FRP) is widely used in the construction industry for structural strengthening due to their outstanding mechanical properties. However, the production of synthetic fibers such as FRP is detrimental to the environment. Alternatively, natural fiber composite may be used as external strengthening material. This paper presents the potential of bamboo fiber composite plate (BFCP) to strengthen the reinforced concrete (RC) beams in flexure. The bamboo of species Dendrocalamus asper was used to produce the fiber and fiber-to-volume ratio was set at 2:5. The composite plate was fabricated by binding bamboo fibers with epoxy using a hand-lay-up method. The flexural and tensile strength of the BFCP was measured and all the beams were tested to failure under four-point bending test. It was found that BFCP exhibited a higher flexural and tensile strength compared to pure epoxy samples. Meanwhile, the RC beams strengthened using BFCP exhibited an increment of 10-12% in beam structural capacity compared to the un-strengthened beams. Bonding of BFCP in the flexure zone was able to divert the vertical cracks into diagonal at the edge of the composite plate. Findings from this work may serve as a useful guide to strengthen RC beams using a BFCP.

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Strengthening Performance of PALF-Epoxy Composite Plate on Reinforced Concrete Beams

Cited by 12 publications

References 5 publications

Natural fibres and biopolymers in FRP composites for strengthening concrete structures: A mixed review

Natural fibres and biopolymers in FRP composites for strengthening concrete structures: A mixed review

Natural Jute Fibre‐Reinforced Polymer Composite System for Posttensioned Beam Strengthening in Flexure

Strengthening of Reinforced Concrete Beams Using Bamboo Fiber/Epoxy Composite Plates in Flexure

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