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Quality Characteristics of Concrete Poles Manufactured in the Ibadan Metropolis, Southwest Nigeria

Oyawale, Fetus A and Fashola, A.A. (2012) Quality Characteristics of Concrete Poles Manufactured in the Ibadan Metropolis, Southwest Nigeria. In: 2012 International Conference on Clean Technology and Engineering Managemnet, 12th-15th, Mechanical Engineering,Covenant University,Ota,Nigeria.

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Abstract

In Nigeria, power is transmitted by overhead transmission lines fixed on wooden or concrete poles. Often times these poles collapse under excessive loads occasioned by storm and accidents. This project work is to determine the quality characteristics of concrete electric poles used to carry overhead conductors in the Ibadan metropolis of Nigeria. Samples of broken concrete poles were collected from various sites within Ibadan metropolis. Core, permeability, cube and tensile tests were carried out on samples of stumbled poles and fresh concrete mix collected from companies producing poles. This was to check the conformance of the poles to the standard set by the regulatory authority. The test results showed that all the samples on which the core and permeability tests were carried out fell short of the required standard of 37,000KN/m. For the core test, only one sample had the average values of 46,200KN/m and 50,400KN/m2 at 7days and 28days respectively which exceeded the standard minimum value. The results showed that the manufacturers did not use the right ratio of materials, the mode of mixing of the aggregates was not adequate and casting allowed voids/air space which made the poles permeable and the period of curing (the number of days) of the poles was not adequate. Almost all the poles were found to be below standard

Item Type: Conference or Workshop Item (Paper)
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User: Mr Solomon Bayoko
Date Deposited: 13 Jan 2014 11:05
Last Modified: 13 Jan 2014 11:05
URI: http://eprints.covenantuniversity.edu.ng/id/eprint/2004

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