Concrete Beams Strengthened with Jute Fibers

Abstract

Nowadays, the reinforcement of concrete with natural fibers can consider being an effectual scheme to achieve the global demand for sustainable development. Due to sustainability, bio degradability, and environmental friendly, natural fibers are preferred as compared to synthetic fibers. The present study investigated the effect of width and thickness of jute fiber strips on the mechanical properties of reinforced concrete beams (RC beams). The experimental program consisted testing of twenty-four RC beams (150*150*1000 mm) comprised of four groups. The first group consisted of three reference RC beams, the second group consisted of three RC beams strengthened longitudinally with carbon fiber strip (CFRP) of 15 cm width, the third group included nine RC beams strengthened longitudinally with one layer of jute fiber strips (JFRP) having variable width, 5, 10, and 15 cm, and lastly the fourth group which was same as the third group except using double layer of jute fiber strips. Generally, the results showed that toughness, ultimate flexural strength, and load carrying capacity of RC beams strengthened with JFRP were increased with the increase of the strip width and thickness. On the other hand, ductility and stiffness were decreased with the increase of the strip width. Test results showed that load carrying capacity was improved by 5.56 and 11.1% for one layer of jute fiber strips of 5 and 15 cm width respectively as compared with the reference specimens. On the other hand, the load carrying capacity was improved by 3.95 and 8.75 % for two layers of jute fiber strips of 10 and 15 cm width respectively as compared with the one layer strengthened specimens. Concerning the CFRP strengthening, the load carrying capacity was improved by 77.76% as compared with the reference specimens.

Experimental Study on Engineering Properties of Cement Concrete Reinforced with Nylon and Jute Fibers

“…Moreover, 0.4-0.5% jute fiber content was found to be optimum for concrete compressive and tensile strength [40][41][42]. The jute fibers have also found their effectiveness in strengthening the concrete beams as it improves strength values, ductility, stiffness, and toughness of concrete beams [43]. In addition, the jute fiber can also be utilized in high-strength concrete as a spalling prevention agent [44].…”

Influence of Basalt and Geo-Textile Fiber Wrapping on Compressive and Flexural Strengths of HDPE-filled Reinforced Concrete

“…Fiber wrapping with the addition of HDPE fillers in concrete for different proportions has a significant effect on compression strength which is shown in Figure 4(b). The width and thickness of the fabric coverage area have a significant effect on loadcarrying capacity in concrete beams strengthened with FRP (19,27) .In this study, all the faces of concrete samples were wrapped with fabric. It is observed that 0%, 0.5% 1%,1.5%,2%,2.5%, and 3% filled HDPE fiber reinforced concrete wrapped with Basalt https://www.indjst.org/ fiber increases the compressive strength by 23%, 21%, 22%, 28%,16%, 29%, and 30% respectively.…”

“…A catastrophic failure in plain concrete was observed in the loading direction and is depicted in Figure 5(a). Enhancing the strength of concrete can be achieved by the wrapping technique, but reduced ductility was observed with this technique (15,18,19,28) . This is due to brittle failure of concrete and hence transfer of load to FRP wrapped jacket.…”

“…Even in concrete strengthened with sisal FRP debonding of sisal FRP can be overcome by selecting a compatible resin system (18) . The effect of wrapping width and thickness of jute fiber on the concrete surface was studied by Yaseen A. Salih et al (19) The author reported that increasing the width of the wrapping has a significant effect on load-carrying capacity compared to the thickness of the wrapping. The proper adhesion between jute fiber and concrete surface results in better compression strength compared to polypropylene fiber-wrapped concrete samples (20) .…”

Effect of Jute Fibre Reinforcement on Shear Strength of Concrete

“…A percentage increase of 68.13% was found at 28 days tensile strength using a fibre volume fraction of 0.75% [8]. The addition of fibre reinforcement to concrete has now been considered an effectual way to achieve the global demand for sustainable development, due to their sustainability, bio-degradability, and environmental friendliness, natural fibres are preferred as compared to synthetic fibres [9]. According to findings, adding 1% sisal fibre to concrete increases the compressive and shear strengths by 16.9% and 9.5%, respectively, when compared to normal concrete.…”