http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/47 Building Sat, 02 May 2026 21:07:49 GMT 2026-05-02T21:07:49Z http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/30711 Title: Exploratory Study on Integration of Circular Economy Principles into Waste Mitigation Principles in Construction Projects Authors: Maikudi, N,; Agbo, E. A. Abstract: In Nigeria, especially within the Federal Capital Territory, Abuja, the rapid pace of urbanization and infrastructure development has led to a sharp increase in construction waste, much of which is improperly managed. Traditional linear production models that emphasize “take–make–dispose” practices have proven unsustainable. Consequently, the circular economy (CE) framework which emphasizes reducing, reusing, recycling, recovering, and regenerating materials has emerged as a viable strategy for promoting sustainable construction and minimizing environmental impact. However, the strategy has not been effectively adopted in Nigerian construction industry. Therefore, this study aimed to evaluate the application of circular economy principles for waste mitigation in construction projects in Abuja, Nigeria. The research adopted a descriptive survey design, targeting professionals in the construction industry, including architects, engineers, builders, quantity surveyors, and project managers. A structured questionnaire was administered to 450 respondents, while 427 valid responses were analyzed using the Statistical Package for Social Sciences (SPSS). Descriptive statistics were employed to summarize the data obtained in the study. Findings revealed that recycling (64%), waste segregation (56%), and reduction at source (42%) are the most frequently used waste mitigation practices in the study context. The study also identified three major CE integration dimensions which are material innovation, process redesign, and service models which together accounted for 84% of the total variance in CE adoption. The study concludes that integrating circular economy principles into waste reduction strategies can substantially enhance resource efficiency, reduce material waste, and foster sustainable construction practices in Abuja’s building sector. Description: JOURNAL ARTICLE Sat, 28 Feb 2026 00:00:00 GMT http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/30711 2026-02-28T00:00:00Z http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/30689 Title: Assessment of Level of Compliance with Health and Safety Regulations On Nigerian Construction Sites Authors: Ayegba, Calistus; Agbo, Adakole E Abstract: Compliance with health and safety rgulations (H.S.R) on construction site is foundamental to employees’ safe delivery of work or assignment. The effectiveness of H.S.R on construction site leads to safe working condition which will increase efficiency and productivity. The study investigates levels of compliance of contractors, employees and clients with health and safety regulations on construction sites and the factors affecting compliance with H.S.R in Northern Nigeria. The study uses physical observation on site with check list and questionnaire to generate data used. The analysis of data was done by the use of SPSS spread sheet to obtain mean scores. The result indicated that employers/contractors’ level of compliance was little, while employees comply averagely and clients show a high compliance level. Lack of contract provision to support compliance with H.S.R., bribery and corruptions, lack of enforcement, management negligent attitude and lack of knowledge on H.S. policy implementation were identified and ranked by the respondents as the 5 top most critical factors affecting compliance with H.S.R on construction site in Northern Nigeria. The study concluded that compliance level of employers/contractors with H.S.R on construction sites in Northern Nigeria was low. It is recommended that provision for H.S. in contract document be made and severe penalties be attached to non compliance with H.S.R on construction sit Description: JOURNAL ARTICLE Wed, 01 Mar 2023 00:00:00 GMT http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/30689 2023-03-01T00:00:00Z http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/30675 Title: Critical Factors Influencing Construction Labour Productivity in Carpentry and Steel Fixing in North Central Nigeria Authors: Edwin, Adakole Agbo; Calistus, Ayegba Abstract: This paper evaluate productivity factors influencing the output of steel fixer (iron bender) and carpenter in North- Central Nigeria with a specific objective to identify critical a factors influencing steel fixers and carpenters labour productivity on site, ranking the seventy level of the influence of these factors on their output. The research adopted a triangulation method (mixed method) of data collection into achieve the set objectives. These involved the use of structured questionnaire and direct observation on site. The analysis of data uses Relative Importance Index (RII) and direct calculation of productivity using the labour productivity formula. From the result of the analysis, the average daily labour productivity for steel fixers and carpenter in the North-Central Nigeria was found to be 377.8kg and 3.02m2 with an average variation of 20.05kg and 0.35m2 respectively. These were in line with the previous studies. The study identified 21 factors that are critical to the performance of steel fixers and carpenters in North – Central Nigeria. Among these factors, designed shape and size, alteration of drawings and specification during execution and lack of experience were ranked as the most critical factors for carpenters while designed shape and size, alteration and working at high places were ranked the most critical factors for steel fixers. The study concludes that the labour productivity of steel fixers is slightly below average while that of carpenter is slightly above average. Description: JOURNAL ARTICLE Mon, 01 Dec 2014 00:00:00 GMT http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/30675 2014-12-01T00:00:00Z http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/30674 Title: Quantifying the Impact of Work Environment Factors on the Variability of Labour Productivity in Wall Plastering Authors: Agbo, Edwin A.; Izam, Yohanna D; Ayegba, Calistus Abstract: Variability in labour productivity is a performance inhibitor and a determinant of effective and ineffective projects. It has hampered the intercomparison of construction projects and the accurate forecasting of project duration and cost. This study chose wall plastering activities as a case study. This study aims to quantify the impact of work environment factors on the variability of labour productivity. Data were collected using direct site observations and structured questionnaires. The results revealed that “Waiting for materials” (62.4%), “Being on the job but not working” (52.6%) and “Work area congestion” (52.5%) all had negative effects on labour productivity variance. Other negative factors include “Rework” (51.7%), “Waiting for tools/equipment” (51.1%), “Waiting for information” (47.2%) and “Weather changes”. The overall average daily productivity was 1.268 whr/m2, baseline productivity = 0.993 whr/m2 and variation in daily productivity = 22.08%; where whr refers to work hours. The findings identified significant work environment factors and quantified their impacts on labour productivity variability in plastering activity. The results indicate that work environment factors during work in progress significantly impact the variability of labour productivity in plastering work and ample consideration should be given to its effects. Description: JOURNAL ARTICLE Thu, 15 Dec 2022 00:00:00 GMT http://irepo.futminna.edu.ng:8080/jspui/handle/123456789/30674 2022-12-15T00:00:00Z