The role of steel fibres on the compressive and tensile properties of concrete

Gwaya, Oswald (2020) The role of steel fibres on the compressive and tensile properties of concrete. [USQ Project]

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Concrete being a widely used structural material due to its good compressive strength and versatility under harsh conditions; it does suffer from weak tensile strength. Concrete tends to develop cracks which weakens its structural performance and leads to a reduction of its durability and failure in some cases. One of the ways to sort out this problem is to incorporate reinforcement bars and fibers. This study is on steel fiber reinforced concrete and the role of those steel fibers in the strength of concrete and which dosage level is both appropriate and economical in concrete production. The study has followed an experimental approach guided by the outcome of the comprehensive literature review. Cylindrical specimens of size 100mm diameter and 200 mm high are utilized. Uniaxial comprehensive and splitting tensile strength were investigated through test of 72 concrete cylinders. The tests were conducted for plain concrete 3 cylinders which are tested at 7 days, 14 days and 28 days; the same is repeated for 0.5% steel fibers, 1% steel fibres and 2% steel fibres both for compressive and splitting tensile tests. Regressions are done in MS-Excel and linear models developed which can be used to predict compressive and tensile strength of concrete with different dosages of steel fibres. It is established that the steel fibres have an effect on concrete strength development whereby they contribute 36.5% at 2% steel fibres and 81.2% for splitting tensile strength enhancement.

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Item Type: USQ Project
Item Status: Live Archive
Faculty/School / Institute/Centre: Historic - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 Jul 2013 - 31 Dec 2021)
Supervisors: Manalo, Allan
Qualification: Bachelor of Engineering (Honours)(Civil)
Date Deposited: 23 Aug 2021 23:14
Last Modified: 26 Jun 2023 04:03

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