Flexural performance of CFRP textile-retrofitted RC beams using cement-based adhesives at high temperature

Hashemi, Seyed Shaker; Al-Mahaidi, Riadh

doi:10.1016/j.conbuildmat.2011.09.015

Cited by 71 publications

(15 citation statements)

References 5 publications

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“…Thus, we can conclude that flexural strengthening of RCC beams can be achieved by the use of woven jute FRP composites. (9) In the beams, JF1 and JF2, the strengthening effect was very noteworthy with one layer itself, providing an increase in the flexural strength by 62.5%, and woven jute FRP bonding also promoted ductile failure without any concrete crushing or FRP rupture or any debonding of FRP, even at very high loads. Hence with increasing the number of layers of jute FRP, a more significant strength improvement could be attained in the flexural strength.…”

Section: Discussionmentioning

confidence: 90%

“…The most common FRP materials used for retrofitting 2 Advances in Materials Science and Engineering and rehabilitation of concrete members include carbon, glass, and aramid FRPs. It has been experimentally proved that when concrete beams and columns are retrofitted with carbon-fibre-reinforced polymer (CFRP) composites, then there is an enhancement in the flexural strength, shear strength, and torsional strength [5][6][7][8][9]. Also glass fibre reinforced polymer (GFRP) composites have been very successful in improving the flexural strength, shear strength, torsional strength, and so forth of concrete structures.…”

Section: Introductionmentioning

confidence: 99%

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Pretreatment of Woven Jute FRP Composite and Its Use in Strengthening of Reinforced Concrete Beams in Flexure

Sen

Reddy²

2013

Advances in Materials Science and Engineering

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Environmental awareness motivates researchers worldwide to perform studies of natural fibre reinforced polymer composites, as they come with many advantages and are primarily sustainable. The present study aims at evaluating the mechanical characteristics of natural woven jute fibre reinforced polymer (FRP) composite subjected to three different pretreatments, alkali, benzyl chloride, and lastly heat treatment. It was concluded that heat treatment is one of the most suitable treatment methods for enhancing mechanical properties of jute FRP. Durability studies on Jute FRP pertaining to some common environmental conditions were also carried out such as effect of normal water and thermal aging on the tensile strength of jute FRP followed by fire flow test. The heat treated woven jute FRP composites were subsequently used for flexural strengthening of reinforced concrete beams in full and strip wrapping configurations. The study includes the effect of flexural strengthening provided by woven jute FRP, study of different failure modes, load deflection behavior, effect on the first crack load, and ultimate flexural strength of concrete beams strengthened using woven jute FRP subjected to bending loads. The study concludes that woven jute FRP is a suitable material which can be used for flexural upgradation of reinforced concrete beams.

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Section: Discussionmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Pretreatment of Woven Jute FRP Composite and Its Use in Strengthening of Reinforced Concrete Beams in Flexure

Sen

Reddy²

2013

Advances in Materials Science and Engineering

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“…The cracks at ultimate load of strengthened beams by full wrapping technique, could not be visualized, since the woven sisal FRP remained bonded to the beam even at failure. (10) The use of natural woven sisal FRP was very effective in the case of shear strengthening of reinforced concrete beams. The ultimate shear strength of all the strengthened beams increased with the increasing width of the FRP, as strip wrapping showed lesser load carrying capacity than full wrapping.…”

Section: Discussionmentioning

confidence: 99%

“…FRP composites possess some outstanding properties such as resistance to corrosion, good fatigue and damping resistance, high strength to weight ratio, and electromagnetic transparency. FRP has found an increasing number of applications in construction either as internal or as external reinforcement for concrete structures [6][7][8][9][10][11][12][13]. It is well known that FRP possesses a major advantage over conventional steel in reinforcing concrete structures.…”

Section: Introductionmentioning

confidence: 99%

Efficacy of Thermally Conditioned Sisal FRP Composite on the Shear Characteristics of Reinforced Concrete Beams

Sen

Reddy²

2013

Advances in Materials Science and Engineering

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The development of commercially viable composites based on natural resources for a wide range of applications is on the rise. Efforts include new methods of production and the utilization of natural reinforcements to make biodegradable composites with lignocellulosic fibers, for various engineering applications. In this work, thermal conditioning of woven sisal fibre was carried out, followed by the development of woven sisal fibre reinforced polymer composite system, and its tensile and flexural behaviour was characterized. It was observed that thermal conditioning improved the tensile strength and the flexural strength of the woven sisal fibre composites, which were observed to bear superior values than those in the untreated ones. Then, the efficacy of woven sisal fibre reinforced polymer composite for shear strengthening of reinforced concrete beams was evaluated using two types of techniques: full and strip wrapping techniques. Detailed analysis of the load deflection behaviour and fracture study of reinforced concrete beams strengthened with woven sisal under shearing load were carried out, and it was concluded that woven sisal FRP strengthened beams, underwent very ductile nature of failure, without any delamination or debonding of sisal FRP, and also increased the shear strength and the first crack load of the reinforced concrete beams.

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“…, 2011; Barros et al, 2007; Esfahani et al, 2007; Al-Rousan and Issa, 2011; Hashemi and Al-Mahaidi, 2012)" [8,9,10,11,12]…”

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confidence: 99%

Strengthening of Reinforced Concrete Beam Elements by Wrapping with Gfrp

Selvi¹,

Sakthivel²,

PoornimaGandhi³

2018

IJET

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Structural elements need to strengthening and retrofitting works as a result of ageing, upgrading of structure due to new design codes or any Environmental issues. The strengthening or retrofitting of existing structures are done externally to the structural members using various techniques such as jacketing, retrofitting, guniting and shotcreting, and ferrocement techniques. The experiment is carried out to increase the load carrying capacity of structure by wrapping externally the beam elements with Glass Fibre Reinforced Polymer mats (GFRP) is wrapped around the beam elements. The load carrying capacity is analysed using single and double layer wraps on damaged and undamaged specimens and compare with conventional beam as control specimens. Beam specimens of size 750 mm x 150 mm x 150 mm with M30 Grade concrete used in the experiment. The result of flexural strength and load – deflection of test and control beam have brought out with energy absorption coefficient. The study results have demonstrated that the performance of 1 layer GFRP wrapped beams show an increased load carrying capacity of 1.86 times of that of conventional beam, and 2 layer GFRP wrapped beam show an increase in load capacity of 2.6 times of that of conventional concrete.

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Flexural performance of CFRP textile-retrofitted RC beams using cement-based adhesives at high temperature

Cited by 71 publications

References 5 publications

Pretreatment of Woven Jute FRP Composite and Its Use in Strengthening of Reinforced Concrete Beams in Flexure

Pretreatment of Woven Jute FRP Composite and Its Use in Strengthening of Reinforced Concrete Beams in Flexure

Efficacy of Thermally Conditioned Sisal FRP Composite on the Shear Characteristics of Reinforced Concrete Beams

Strengthening of Reinforced Concrete Beam Elements by Wrapping with Gfrp

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