Verification Of Mechanical Properties Of Reinforcement Steel Bars Used In Nigerian Local Building And Construction Sites (Imo State As Case Study)

• Author(s): Anyanwu Kingsley O. ; Ekengwu Ignatius E. ; Utu Ochuko G.
• Paper ID: 1701712
• Page: 217-226
• Published Date: 26-10-2019
• Published In: Iconic Research And Engineering Journals
• Publisher: IRE Journals
• e-ISSN: 2456-8880
• Volume/Issue: Volume 3 Issue 4 October-2019

Abstract

An investigation was conducted on the conformance of the mechanical properties of the reinforcement bars used in local building and construction with the BS8110 design standard adopted in Nigerian considering grade S460 reinforcement bars and using Imo State as case study. In this paper, seven Local Government Areas in Imo State were considered as given in table 3.1. Two samples each of 12mm, 16mm and 20mm ribbed bars were collected from each of the seven Local Government Areas considered. The samples have 100cm gauge length and total length of 114cm each as recommended by the laboratory where they were analyzed. Tensile test was conducted on each sample using Universal Testing Machine (Avery Denison), while the chemical analysis was done after the tensile test using a spectrometer (spectromax). The results obtained show that out of 21 average result, only 5(24%) of the samples satisfy yield strength requirement based on the acceptability range of (420 ? 475)N/mm2 for grade S460 used, which has standard yield strength of 460N/mm2 according to BS8110 code. 2(10%) satisfy elongation requirement based on acceptability range of (11 ? 15)% against 14% for grade S460 steel according to BS4449:1997.(10%) satisfy both yield strength and elongation requirement. It was also observed through the chemical analysis that increase in carbon equivalence increases the strength of the steel but decreases its ductility and for a given carbon equivalence, increase in bar size results to decrease in strength but increase in ductility.

Keywords

Ductility, Elongation, Tensile test, Universal Testing Machine, Yield strength

Citations

IRE Journals:
Anyanwu Kingsley O. , Ekengwu Ignatius E. , Utu Ochuko G. "Verification Of Mechanical Properties Of Reinforcement Steel Bars Used In Nigerian Local Building And Construction Sites (Imo State As Case Study)" Iconic Research And Engineering Journals Volume 3 Issue 4 2019 Page 217-226

IEEE:
Anyanwu Kingsley O. , Ekengwu Ignatius E. , Utu Ochuko G. "Verification Of Mechanical Properties Of Reinforcement Steel Bars Used In Nigerian Local Building And Construction Sites (Imo State As Case Study)" Iconic Research And Engineering Journals, 3(4)