Strengthening effect of natural fiber reinforced polymer composites (NFRP) on concrete

Yinh, Seyha; Hussain, Qudeer; Joyklad, Panuwat; Chaimahawan, Preeda; Rattanapitikon, Winyu; Limkatanyu, Suchart; Pimanmas, Amorn

doi:10.1016/j.cscm.2021.e00653

Cited by 23 publications

(15 citation statements)

References 44 publications

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“…Reinforced concrete (RC) beams and concrete columns were the most member type strengthened with biobased FRP, with research considering these member types accounting for 40% and 37%, respectively. Concrete beams [45][46][47][48][49][50][51][52][53][54][55][56] and RC columns [57,58] represented 14% and 2% of the members strengthened. RC slab [59], concrete slab [60], RC wall [61], masonry brick [62], masonry wall [63] and wood laminated beam [64] had a single occurrence.…”

Section: Structural Members Strengthenedmentioning

confidence: 99%

“…The failure modes designated by Cc start to occur from below the tension steel and are characterised by a more abrupt failure. At the beam midspan, concrete cover debonding, Cc mid 1 or concrete cover splitting, Cc mid 2 can occur; this happened with [83] and [50], respectively. The beam can also fail by FRP debonding induced by intermediate shear crack, Cc sp 3 as in [84].…”

Section: Beam Failure Modesmentioning

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: Structural Members Strengthenedmentioning

confidence: 99%

Section: Beam Failure Modesmentioning

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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“…Considering a variety of polymer matrices, the FRP thickness and compressive strength of concrete, Yinh et al [ 47 ] discovered that using natural sisal FRPs is considerably beneficial in improving the strength and ductility of constrained concrete in the experiments. Increasing sisal FRP thickness results in an improvement in load-carrying capability and ductility.…”

Section: External Bonded Nfrp Strengthening Techniques Adopted In Pas...mentioning

confidence: 99%

“…Due to its superior mechanical qualities, epoxy resin was chosen over polyester resin in this application. Based on trial findings, this anchoring mechanism was determined to be successful in keeping natural sisal FRPs attached to the concrete surface [ 47 ].…”

Section: External Bonded Nfrp Strengthening Techniques Adopted In Pas...mentioning

confidence: 99%

Experimental Investigation on the Strengthening of Reinforced Concrete Beams Using Externally Bonded and Near-Surface Mounted Natural Fibre Reinforced Polymer Composites—A Review

Effiong

Ede

2022

Materials

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Developing more resilient and sustainable physical infrastructure increases the demand for sustainable materials and strengthening approaches. Many investigations into strengthening RC beam structures have used either externally bonded (EB) or near-surface mounted (NSM) systems with synthetic fibre reinforced polymer composites. These synthetic fibres are unsustainable since they involve the use of nonrenewable resources and a large amount of energy. Research shows that natural fibre reinforced polymer (NFRP) composites may be an alternative to synthetic FRP composites in the strengthening of concrete beams. However, there is limited literature that validates their performance in various structural applications. Hence, the purpose of this paper is to explore the advances, prospects, and gaps of using EB/NSM NFRP techniques in strengthening concrete beams to provide areas for future research directions. The NSM FRP technique provides improved strengthening effects and mitigates the concerns associated with the EB system, based on a wider range of applications using synthetic FRPs. However, the NSM NFRP strengthening technique has been underutilized, though the EB NFRP system has been more commonly explored in reviewed studies. The knowledge gaps and areas for proposed future research directions are essential in developing work in emerging NFRPs and strengthening techniques for sustainable infrastructure.

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“…Further, these FRPs are synthesized using chemicals that are capable of imparting skin issues such as irritant and allergic contact dermatitis for concerned personnel [32][33][34]. Recently, a possible solution was proposed to replace these synthetic fibers using natural fibers [35,36]. Salient features of natural FRPs include their substantial low costs in comparison to synthetic FRPs and do not carry risk to skin diseases as associated with synthetic FRPs [37][38][39][40].…”

Section: Introductionmentioning

confidence: 99%

Sustainable and Low-Cost Hemp FRP Composite Confinement of B-Waste Concrete

et al. 2022

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Each year, massive amount of construction waste is generated that needs proper attention in terms of its disposal without deteriorating surrounding environment. A significant portion of this waste comprises bricks. Besides, large number of new construction works are resulting in the depletion of natural resources rapidly. Intuitively, a sustainable solution demands to consume this construction waste in the best way possible. This study targeted brick waste as a potential material to be used as a partial replacement of natural aggregates in structural concrete. It has been known that the concrete constructed with recycled brick aggregates possesses substandard mechanical properties. Traditionally, synthetic FRPs are known to strengthen recycled aggregate concrete. However, recognizing high costs associated with them, this study proposed the use of natural hemp fiber ropes to strengthen recycled aggregate concrete constructed with brick aggregates. To assess the efficacy of hemp ropes in strengthening mechanical properties of the concrete with coarse aggregates partially replaced with recycled brick aggregates (B-waste), an experimental framework was conducted. Sixteen cylindrical specimens were tested in two groups depending upon the concrete strength. Within each group, 2 specimens each were strengthened with 1, 2, and 3 layers of hemp fiber ropes. Axial monotonic compressive loading was applied to each specimen. Results revealed that hemp fiber ropes significantly improved ultimate compressive strength and the corresponding strain. A substantial improvement in axial ductility was observed. For the sake of performance-based non-linear modelling, accurate constitutive modelling at material level is necessary. For this purpose, several existing analytical stress-strain models were tested in this study to predict ultimate confined compressive strength and strain. It was found that several models predicted confined compressive strengths with reasonable accuracy. However, very few models were able to predict confined peak strain with good accuracy.

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Strengthening effect of natural fiber reinforced polymer composites (NFRP) on concrete

Cited by 23 publications

References 44 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

Experimental Investigation on the Strengthening of Reinforced Concrete Beams Using Externally Bonded and Near-Surface Mounted Natural Fibre Reinforced Polymer Composites—A Review

Sustainable and Low-Cost Hemp FRP Composite Confinement of B-Waste Concrete

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