Department of Civil Engineering
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Item Enhancing Construction Claims and Dispute Resolution in the Nigerian Building Sector: Insights from Thematic Analysis.(NJEAS, 2024-04-22) Muhammad Zailani; Onyebuchi Mogbo; Musa Umar KoloThe study investigates the mechanisms of construction claims and dispute resolution within the Nigerian building sector, employing a thematic analysis to uncover insights that could enhance these processes. The research methodology involved semi-structured interviews with professionals from leading construction companies in Abuja, Nigeria. Participants were selected through purposive sampling, ensuring they possessed relevant experience in managing construction claims and disputes. The data collected was rigorously analyzed using thematic analysis, which facilitated the identification of prevalent challenges and the evaluation of current dispute resolution methods. The findings reveal that contractual ambiguities, communication failures, and cultural differences are the primary sources of disputes, leading to significant project delivery issues such as cost overruns, schedule delays, and quality defects. Traditional dispute resolution methods, including negotiation, arbitration, and litigation, are commonly utilized, yet the study identifies a notable gap in the adoption of Alternative Dispute Resolution (ADR) techniques. Barriers to ADR implementation, such as lack of awareness and trust among professionals, were highlighted. The study contributes to knowledge by providing a comprehensive understanding of the dispute sources and by evaluating the effectiveness of existing resolution methods. It also offers strategic recommendations for the development of a structured framework for claims management, tailored to the Nigerian context. The implications of this research are far-reaching, suggesting improvements in contractual clarity, communication training, and policy reforms that could significantly benefit the construction industry.Item The Use of Polymer for Road Surfacing as a Strategy for Waste Recycling in Maiduguri(ICMEAS, 2023-11-01) Abubakar Damaramma Abbari; Musa Umar Kolo; Onyebuchi Mogbo; Petrus Nzerem; Ayuba SalihuThe road network in Maiduguri, Borno State in Nigeria has been continuously deteriorating due to the ongoing rise in traffic combined with insufficient maintenance due to a lack of funding. Various actions, such as securing finances for maintenance, improving roadway design, using better quality materials, and using more efficient construction techniques are reported to be useful in reducing this process. The purpose of this study was to investigate the effect of polythene on the characteristics of asphalt and concrete for road surfacing as well as strategy for waste recycling. Hot bitumen and waste polymer were combined at 160°C using a strong mechanical stirrer; plastic was added to the bituminous mix using wet process techniques to create polymer-modified bitumen. Base bitumen with a penetration grade of 60/70 was used for the laboratory tests. To achieve consistency in the mixture, all the polymers were heated and chopped into pieces. 2%, 4% and 6% volume of polymer were used with a control volume of 0%. Different tests such as the Viscosity test, Flash and fire point test, Penetration test, Marshall Test, and Ductility test were all conducted using standard procedures. The test results for penetration, ductility, viscosity, flash and fire points, indicate that the material is becoming less consistent and more resistant to temperature variations. The marshal test findings showed that the modified combination had higher stability and a lower % of VMA (Voids in mineral aggregates) than the traditional plain mixtures. This would significantly increase these mixes' resistance to rutting.