Article Number: DRJEIT15709076
DOI: https://doi.org/10.26765/DRJEIT15709076
ISSN: 2354-4155

Vol. 9 (6), Pp. 261-267, July 2022

Copyright © 2022

Author(s) retain the copyright of this article

This article is published under the terms of the

Creative Commons Attribution License 4.0.


Original Research Article

Assessment of Quality of Concrete Production in Selected Construction Projects within Federal Polytechnic Kaura Namoda  Zamfara State

Nasiru Shehu*

Abdurrahman Umar Nakazalle


Abstract

The use of subpar building materials, which consistently results in structural failure and the loss of life and property in Nigeria’s construction industry, is one of the main issues encountered during the construction of buildings. This is a review of the concrete production at a few Federal Polytechnic Kaura Namoda construction sites. It was accomplished by rigorous examination of contract documentation, with special attention paid to mix design/specification. The information acquired from the document was then used to create concrete samples (control sample). Renal samples of actual concrete were collected at random, cured (sample specimen), and tested for compressive strength after 7, 14, 21, and 28 curing days. A checklist on the proper procedure of concrete manufacture was created and used to analyze how concretes were produced. The study found that non-adherence to the necessary processes of concrete manufacturing, such as using the incorrect water/cement ratio and using a crude way of batching, were the most common difficulties in concrete production. It was also found that the average strength of concrete produced on two construction projects were  10.47 N/mm2and 6.96 N/mm2 which did not attain the minimum strength required at 28 days 21 N/mm2 by the BS 1881, (1983b) part 116, while the concrete produced on another sites has a strength of 20.01N/mm2 at 28 days which is close to the specification of BS 1881 and the controlled sample average strength of concrete at 28 days was 23.79N/mm2 which is within the range specified by the BS 1881 part 116 (1983b). Based on the results, the compressive strength of the concrete collected from sites was 14 percent lower than the control specimen, so it was recommended that 14 percent be added to the estimated design strength as a factor of safety to account for problems with the handling of the concrete materials and other construction inaccuracies. The government and professional organizations should work together to enforce the National Building Code.


Keywords: Concrete, compressive strengths, evaluation, production, quality

 


 Received: May 9, 2022  Accepted: June 27, 2022  Published: July 1, 2022


Copyright © 2022 Direct Research Journal of Engineering and Information Technology