Shear strength of a reinforced concrete beam by PET fiber
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Shear strength of a reinforced concrete beam by PET fiber Taghreed Kh. Mohammed Ali1 Received: 9 December 2019 / Accepted: 1 September 2020 © Springer Nature B.V. 2020
Abstract The shear strength and deformation of reinforced concrete beams have been investigated. For this purpose, an experiment was carried out in the laboratory for the purpose of casting and testing six reinforcement beams, designed to fail in shear, made of concrete containing different PET waste fibers. Direct shear strength of reinforced concrete by PET fiber was also studied via testing six push-off specimens. There is an improvement of the shear capacity of the reinforced concrete beam by 1% PET fiber volume, reached 11.1%. The improvement of direct shear capacity is 43.5% at 1.25% PET fiber volume. Also, the obtained test data demonstrated that adding PET fiber to the concrete beam is capable of changing mode of failure from shear to flexure in concrete beams. Deformations and cracking characteristics of beams and push-off specimens were all modified due to adding PET fiber. Equations have been proposed to calculate direct shear and shear strength of concrete and reinforced concrete beam via adding PET fiber through the usage of the current investigation and available data in Afroz et al. (Int J Sci Eng Technol Res IJSETR 2(9):1668– 1672, 2013), Al-Hadithi and Abbas (Iraqi J Civ Eng 12:110–124, 2018), Nibudey et al. (Int J Mod Trends Eng Res IJMTER 02:58–65, 2015) and Prabha and George (Int J N Technol Res IJNTR 3(5):54–56)). Keywords Concrete beam · Direct shear · Flexure · PET fiber · Push-off specimen
1 Introduction Polyethylene terephthalate (PET) is widely utilized for industrialized plastic bottles as the container for different food and liquids. Therefore, there are massive quantities of regularly used plastics that lead to huge volumes of wastes and consequently significant ecological difficulties. PET is considered a hard waste material of any city. The plastic waste is a nonbiodegradable, so the discard of consumed PET has enormous influences on the ecological contamination (Afroz et al. 2013). As well, the burning of PET bottles leads to emission toxic gasses capable of contaminating the air.
* Taghreed Kh. Mohammed Ali [email protected] 1
Department of Architecture, Faculty of Engineering, Koya University, Koya KOY45, Kurdistan Region, Republic of Iraq
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For the latter periods, researchers have concentrated their experiments in utilizing PET waste in place of normal constituents for manufacturing construction materials of various applications. Researchers Siddique et al. (2008) and Gu and Ozbakkaloglu (2016) have been studied to inspect various properties of concrete with usual aggregates partly substituted with plastic aggregates resulted in plastic wastes. Also, the researchers conducted investigations on the usage of PET waste as fibers in concrete. Irwan et al. (2014) studied the shapes of the spread cracks in the reinforced concrete beams having fine P
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