*Ugochi A. Asikogu (AUTHOR)
Department of Building, Imo State University, P.M.B. 2000, Owerri, Nigeria
*Corresponding Author’s Email: asklin2007@gmail.com; ugochiaskogu@imsuonline.edu.ng
ABSTRACT: Optimal composition of concrete materials management process requires that a necessary framework be adopted for sustainable building project delivery. Despite the importance of concrete in building construction, poor management processes often result in material wastage, delays, cost overruns, rework, claims, and stakeholder dissatisfaction. Quality concrete can only be achieved through adequate control and care at every stage of production to ensure uniform strength from batch to batch. This study, as a pilot scheme, developed an optimal composition of labour required for concrete work to enhance project efficiency, quality, and sustainability in the study area. The study aimed to identify the components of concrete materials relevant to labour requirements, explain the concept of optimal labour composition, and develop a framework for determining the optimal labour force required for concrete work. Findings revealed that for 1,800 m³ of concrete, the batching and mixing gang required seven (7) workmen, the transportation gang required eleven (11) workmen, and the placement gang required seven (7) workmen. In addition, one (1) mixer operator was required, giving a total optimal labour force of twenty-six (26) workers for concrete works on the foundation trenches of the proposed Postgraduate Lecture Theatre, Building Department, Imo State University, Owerri. The study demonstrates the importance of analytically determining appropriate labour requirements to ensure timely, efficient, and sustainable project delivery. It recommends strict monitoring through a national or zonal code of practice to ensure quality concrete production at every stage. Stakeholders and construction operatives should also ensure the use of appropriate materials and workmanship while adhering to specified project schedules.
Keywords: Concrete Materials; Optimal Composition; Labour Force