Concrete Columns Wrapped with Hemp Fiber Reinforced Polymer – An Experimental Study

Ghalieh, Lea; Awwad, Elie; Saad, George; Khatib, Helmi; Mabsout, Mounir

doi:10.1016/j.proeng.2017.07.062

Cited by 38 publications

(14 citation statements)

References 6 publications

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“…Therefore, nowadays, efforts have been made to replace the conventional composite materials, i.e., C/GFRP, with alternate materials for civil infrastructure applications, to gain economic and environmental benefits. Studies were conducted on the use of economical and environmentally friendly fibers including hemp [34,35], sisal [36][37][38], jute [36,37,39], coir, and flax [33,40]. Previous studies exemplify that natural fibers have high potential in the reinforcement of the cement matrix [33][34][35][36][37][38][39][40].…”

Section: Introductionmentioning

confidence: 99%

“…In comparison with conventional C/GFRP, natural fibers have a low density, low to moderate tensile properties, low cost, easy availability, and non-abrasive nature. Ghalieh et al [34] carried out an experimental testing to study the performance of circular concrete specimens wrapped with a hemp fiber reinforced polymer jacket and concluded that hemp fiber could increase the axial strength and ductility of jacketed specimens. In another study, Sen and Reddy [37] highlighted that jute and sisal fiber could significantly enhance the load-bearing capacity as well as energy absorption of concrete columns.…”

Section: Introductionmentioning

confidence: 99%

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Performance of Concrete Confined with a Jute–Polyester Hybrid Fiber Reinforced Polymer Composite: A Novel Strengthening Technique

Wahab

Srinophakun

Hussain³

et al. 2019

Fibers

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The strengthening and rehabilitation of concrete members is an important issue which arises worldwide. Carbon, aramid and glass fiber reinforced polymer (FRP) composites are mainly used for strengthening and rehabilitation. However, its use is limited on a small scale because of its high price, lack of availability and environmental impacts. The solution of this issue gives rise to the use of locally available natural fibers and low-cost synthetic fibers. This paper presents the experimental and analytical results of circular and square concrete columns confined with jute-polyester hybrid FRP composites. The main objective of this study is to evaluate the viability and performance of concrete confined with the hybridization of jute and polyester (FRP) composite sheets to utilize its superior properties. A novel hybrid technique has been applied for the wrapping of fiber sheets. The fiber sheets were applied in such a way that a uniform bond between the inner and outer layer was achieved. A total of 32 plain, standard size circular and square concrete specimens, externally wrapped with a jute-polyester FRP (JPFRP) composite, were tested under monotonic axial compressive loads. The result shows that JPFRP confinement increased the strength, strain and ductility index ranged between 1.24 and 2.61, 1.38 and 8.97, and 4.94 and 26.5 times the un-jacketed specimen, respectively. Furthermore, the wrapping has a significant effect on the low-strength specimens, having a circular cross-section. For high strength specimens, the post-peak stress-strain behavior was dominated by the outer polyester jacket because of its large rupture strain. Additionally, the test results were used to evaluate the existing strength-strain models derived for conventional FRPs. The models predicted values either underestimating or overestimating the compressive strength and strain of JPFRP-confined specimens. However, the strength models performed better than the strain models. The JPFRP wrapping significantly enhanced the strength, fracture energy, ductility index, and post-peak response. Therefore, JPFRP confinement can be used for a small-scale application, where little strength and high ductility is demanded. Moreover, it can be used to prevent the peeling of the concrete cover and moisture penetration into the concrete.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Performance of Concrete Confined with a Jute–Polyester Hybrid Fiber Reinforced Polymer Composite: A Novel Strengthening Technique

Wahab

Srinophakun

Hussain³

et al. 2019

Fibers

View full text Add to dashboard Cite

show abstract

“…Table 5 shows the fracture energy values of each sample. The values of fracture energy have been acquired by calculating area under load-displacement curve with a basic assumption that as soon as the maximum load reaches, specimen undergoes sudden failure [13]. Figure 11 presents variation in ductility indices with no.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

“…ductility. Ghalieh et al reported stress-strain response of low strength concrete hemp fabric wrapped cylindrical samples [13]. Compression tests were performed on 1, 2, and 4-layer samples to determine the confinement effectiveness.…”

Section: Introductionmentioning

confidence: 99%

Behavior and properties of tin slag polyester polymer concrete confined with FRP composites under compression

Shakil

Hassan

2020

Journal of the Mechanical Behavior of Materials

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Polymer concrete (PC) has acquired niche in construction industry due to superior mechanical properties, recyclability and adoption of variety of aggregates. This workpresents compressive behavior and properties of one such novel PC i.e. tin slag/polyester polymer concrete. Comparable siliceous content of tin slag was considered promising to provide better mechanical strength as in natural aggregates. Cylindrical short column specimens were fabricated to be tested under quasi-isostatic loading rate of 1 mm/min. Three different aggregate sizes in gap-graded configuration were tested to assess influence on mechanical properties. In addition, specimens were confined with GFRP and CFRP to determine and compare mechanical behavior with Portland Cement Concrete (PCC). Coarsest size (4+2 mm) aggregate offered the highest strength of 37.71 MPa for unconfined sample. This performance of coarsest size persisted in confined condition with compressive strength increment of 69.68 MPa (84.7%) and 98.36 MPa (160.8%) for one and two layers GFRP; 86 MPa (128.05%) and 125.07 MPa (231.66)% for one and two-layer CFRP, respectively. It was concluded that both increment in aggregate size and number of layers improved the compressive strength.

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“…Strengthening with CFRP provides the new thin external layer and CFRP does not intercept the compressive stresses, so just the confinement effect is evaluated. While strengthening with fiber reinforced polymer, textile reinforced concrete or ferro cement, the thickness of external layer varies from 0.2 to 11.5 mm (Raffoul et al, 2017;AL-Gemeel & Zhuge, 2018;Shi-ping, Xiang-qian, & Yun-tao, 2018;Ghalieh, Awwad, Saad, Khatib, & Mabsout, 2017;Thermou & Hajirasouliha, 2018;De Caso y Basalo, Matta, & Nanni, 2012;R. Ortlepp & S. Ortlepp, 2017).…”

Section: Introductionmentioning

confidence: 99%

Influence of HPFRCC Compressive Strength and Confinement on Concrete

Kumar

Daugevičius

2019

Engineering Structures and Technologies

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The article analyses behavior of compressed concrete cylinders which were strengthened with external high performance fiber reinforced cementitious composite (HPFRCC) layer. Two different HPFRCC materials were used for the strengthening, which differed in fiber type. Two different types of loading were applied as well. The load was transferred through the whole cross section of the strengthened element and through the core – internal concrete. Loading through the whole cross section allows to validate the mixture law. Loading through the internal concrete allows to investigate the confinement effect. Comparison of theoretically calculated and experimental strength shows that mixture law and confinement effect is valid. Confinement by HPFRCC allowed to increase the strength of concrete about 4 times, but the ultimate strain remains similar. The strength of elements loaded through the whole surface has increased much more and additionally the ultimate strain has increased too.

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Concrete Columns Wrapped with Hemp Fiber Reinforced Polymer – An Experimental Study

Cited by 38 publications

References 6 publications

Performance of Concrete Confined with a Jute–Polyester Hybrid Fiber Reinforced Polymer Composite: A Novel Strengthening Technique

Performance of Concrete Confined with a Jute–Polyester Hybrid Fiber Reinforced Polymer Composite: A Novel Strengthening Technique

Behavior and properties of tin slag polyester polymer concrete confined with FRP composites under compression

Influence of HPFRCC Compressive Strength and Confinement on Concrete

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