Challenges of Producing Quality Construction Steel Bars in West Africa:Case Study of Nigeria Steel Industry

Abstract

The production of quality high-yield reinforcing steel bars continues to receive attention from researchers across the globe due to its importance and contribution to a country GDP. In most of the developing countries, particularly Nigeria, empirical studies have shown that bars produced through conventional rolling requires appropriate modification of its chemical composition in order to obtain the desired mechanical properties such as strength. However, the high cost factor involved in composition adjustment makes such approach unattractive. Rather, the application of the combination of systems of controlled rolling and controlled cooling proves to be the best option. This system however, requires some variations in processing parameters to suit individual plant production peculiarities. In this paper attempt is made to study the production challenges and opportunities the steel millers are facing in Nigeria. Previous works in this area are also reviewed with a view to charting the way forward. Experimental studies and process monitoring were carried out at some designated rolling mills in Nigeria.

Experimental Investigation into Strength Properties of Ribbed Mild Steel Reinforcing Bars (RMSRBs) Produced by Local Companies in Ghana

“…The images of specimens B and C had a good distribution of the pearlite and ferrite of the core. This could be the reason why RMSRBs from company A obtained higher tensile strength than companies B and C. Martensite was not detected in any of the specimen therefore, the results are similar to the results of previous studies(Chen et al, 2017;Balogun et al, 2009). Dzogbewu and Arthur (2013) also found similar pattern of ferrite and pearlite in the micro-graph images.…”

A comparative analysis of the chemical composition and compliance level to established standards of concrete reinforcement steel rods rolled in Nigeria

“…These trends were also supported by Balogun et al. [ 13 ], Adeleke and Odusote [ 14 ], and Alabi and Onyeji [ 15 ]. Ponle et al.…”

“…[ 12 ] and Balogun et al. [ 13 ], who stated that most locally produced steel bars were non-weldable. These inconsistencies in the results may be due to the lack of proper control of the production process from the steel rods manufacturers.…”

“…They also confirmed that most of the locally produced rebars are non-weldable. This non-weldable property is contrary to the standard requirement for rebars [ 13 ].…”

Client Type and Communication Practice during Pre-Contract Phase of Construction Project Development in South-West, Nigeria

“…In terms of size, [11] and [12] assert that rise in growth of the Nigeria construction industry has made it so large that same can be considered the largest in West African countries. Anny et al [13] however opined that the growth recorded in the Nigeria construction industry is informed by the Government's continued investment in infrastructural development.…”