Chapter
Apr 26, 2013
Assessment of the Quality Steel Reinforcement Bars Available in Nigerian Market
Authors: Opeyemi Joshua [email protected], Kolapo O. Olusola [email protected], Calistus Ayegba [email protected], and Adekunle I. Yusuf [email protected]Author Affiliations
Publication: AEI 2013: Building Solutions for Architectural Engineering
Abstract
The use of substandard and steel reinforcement rods in the construction of structural steel concrete elements of a building, most especially in floor slabs, has been identified as one of the most important causes of structural failures in buildings in Nigeria. This research investigated the mechanical properties (yield strength, ductility and the ultimate tensile strength) of 12-mm diameter steel bars commonly used in reinforcing floor slabs using an extensometer. Results obtained from the tests showed that only three (3) brands out of a total of nine (9) tested most commonly used brands of sampled rods showed yield strengths greater than 460N/mm2. The yield strengths obtained range between 337.72 N/mm2 and 569.71 N/mm2. The study confirmed that the wide usage of substandard steel reinforcement bars in the Nigerian market is a major contributing factor to increasing incidences of structural building failures in the country when viewed from the angle of variability in material quality.
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© 2013 American Society of Civil Engineers.
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Published online: Apr 26, 2013
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Department of Building Technology, Covenant University, Ota. Nigeria. E-mail: [email protected]
Department of Building, Obafemi Awolowo University, Ile-Ife. Nigeria. E-mail: [email protected]
Department of Building, Federal University of Technology, Minna. Nigeria. E-mail: [email protected]
Department of Building Technology, Covenant University, Ota. Nigeria.E-mail: [email protected]
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Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.