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All Journal R.E.M (Rekyasa Energi Manufaktur) Jurnal Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Indonesian Journal of Engineering and Technology (INAJET) Journal of Sustainable Construction Journal of Sustainable Infrastructure Advances in Civil Engineering and Sustainable Architecture
Unegbu, Hyginus
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Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Engineering Environmental Science Mechanical Engineering Transportation

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Building for the Future: Evaluating Sustainable Construction Practices and Overcoming Challenges in Nigeria’s Construction Industry Unegbu, Hyginus; Yawas, D.S.; Dan-asab, B.
Journal of Sustainable Infrastructure Vol. 3 No. 2 (2024): Advances and Challenges in Sustainable Infrastructure
Publisher : Fakultas Perencanaan Infrastruktur, Universitas Pertamina

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61078/jsi.v3i2.29

Abstract

This study investigates the current state of sustainable construction practices in Nigeria, focusing on the environmental, social, and economic dimensions within the construction industry. Utilizing a quantitative research approach, data were collected through survey questionnaires distributed to construction professionals, including engineers, architects, and project managers. With a strong response rate of 95.6%, the data were analyzed using Confirmatory Factor Analysis (CFA) within the LISREL framework. The findings reveal that sustainable practices are inconsistently applied across the industry, with environmental sustainability showing the weakest emphasis. Social and economic sustainability practices also display varied levels of implementation, reflecting significant challenges in fully integrating sustainability into construction projects. The analysis points to inconsistencies and gaps, evidenced by moderate to weak associations between observed practices and their sustainability goals. To address these challenges, the study recommends that policymakers and industry leaders implement comprehensive strategies, including robust regulatory frameworks, targeted capacity-building programs, and incentives to encourage sustainable practices. Enhanced collaboration among stakeholders and increased investment in research and development are essential for fostering innovation and improving sustainability outcomes. Future research should include longitudinal studies to track the evolution of these practices over time, as well as comparative studies across different regions to identify contextual factors influencing sustainability. Additionally, qualitative research methods such as interviews and focus groups are suggested to gain deeper insights into the socio-cultural factors shaping sustainability in Nigeria's construction sector. This study contributes to a deeper understanding of the barriers and opportunities for advancing sustainable construction practices in Nigeria.
Sustainable Construction Practices in Nigeria: A Structural Equation Modeling Approach Unegbu, Hyginus; Yawas, D.S.; Dan-asabe, B.; Alabi, A.A.
Journal of Sustainable Infrastructure Vol. 3 No. 2 (2024): Advances and Challenges in Sustainable Infrastructure
Publisher : Fakultas Perencanaan Infrastruktur, Universitas Pertamina

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61078/jsi.v3i2.30

Abstract

This study investigates the determinants of sustainable construction practices in Nigeria, focusing on the roles of regulatory frameworks, financial incentives, organizational readiness, and awareness and knowledge among stakeholders. Utilizing a cross-sectional survey design, data were collected from 255 experts in the construction sector, consisting of architects, project managers and engineers. The analysis utilized Structural Equation Modeling (SEM) to explore the direct and indirect effects of these factors on the sustainable construction practices adoption. The findings reveal that awareness and knowledge have the most significant impact, highlighting the critical need for education and information dissemination in advancing sustainability. Additionally, robust regulatory frameworks and financial incentives were identified as crucial enablers, facilitating the implementation of sustainable practices by setting standards and reducing financial barriers. Organizational readiness, encompassing leadership support and resource availability, also emerged as a key determinant, mediating the effects of policies and incentives. The study concludes that a multifaceted approach involving strong policies, financial support, and enhanced organizational capacity is essential for promoting sustainable construction in Nigeria. These findings are valuable guide to policymakers, industry stakeholders, and educators in their efforts to foster an environmentally sustainable construction sector.
Assessing the Impact of Green Building Certifications on Construction Practices in Nigeria: A Systematic Review Unegbu, Hyginus; YAWAS, Danjuma S.
Indonesian Journal of Engineering and Technology (INAJET) Vol. 7 No. 1 (2024): September 2024
Publisher : Fakultas Teknik Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/inajet.v7n1.p7-14

Abstract

This study analyzes the impact of green building certifications on construction practices in Nigeria, focusing on LEED, EDGE, and BREEAM. Using a systematic review of literature from 2015 to 2023, it evaluates certification adoption, changes in construction practices, and economic and environmental outcomes. Key findings show limited but growing certification adoption driven by international standards and local initiatives. Certified buildings in Nigeria exhibit improvements in energy efficiency, water conservation, and waste reduction, leading to enhanced sustainability and lower operational costs. However, barriers such as high initial costs, a shortage of skilled professionals, and insufficient government policies hinder progress. The study emphasizes the need for stronger governmental support, increased public awareness, and the development of local industries for sustainable materials. Future research should explore the long-term economic benefits of green buildings, barriers to adoption, and comparative studies with other developing nations. This research provides insights for policymakers, developers, and stakeholders to promote green building practices in Nigeria, aligning with global sustainability goals.
An Analysis of the Challenges to Achieving Sustainable Practices in Nigeria's Construction Sector Unegbu, Hyginus; YAWAS, Danjuma; Dan-asabe, Bashar; Alabi, Abdulmumin Akoredeley
Advances in Civil Engineering and Sustainable Architecture Vol. 7 No. 1 (2025): Advances in Civil Engineering and Sustainable Architecture
Publisher : Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/acesa.v7i1.14464

Abstract

This study investigates the key barriers to the adoption of sustainable construction practices in Nigeria, focusing on regulatory, organizational, social, cultural, and technological factors. Utilizing a mixed-methods approach, the research combines qualitative case studies and interviews with quantitative survey data to identify these challenges. The findings highlight the multifaceted and interconnected nature of these barriers, with regulatory challenges—such as outdated building codes, insufficient legislative support, and bureaucratic inefficiencies—emerging as the most significant. Social and cultural resistance to change, coupled with limited public awareness of sustainable construction benefits, further complicate adoption. Technological challenges, including high costs of green materials and a shortage of skilled professionals, are also key obstacles. The study suggests that Nigeria can draw valuable lessons from other developing countries, such as South Africa, India, and Indonesia, where similar challenges have been addressed through proactive policies and innovative practices. Recommendations for overcoming these barriers include modernizing building codes, strengthening leadership in sustainability within the construction sector, and launching comprehensive public education campaigns to shift societal attitudes. The study further advocates for increased investment in green technologies and the development of local supply chains to reduce costs and enhance the accessibility of sustainable construction materials. By adopting these strategies, Nigeria can promote sustainable building practices and contribute to global knowledge on overcoming barriers to sustainability in developing economies.
Greening Nigeria’s Cities: A Case Study on Renewable Energy in Sustainable Urban Development Unegbu, Hyginus; Yawas, Danjuma Saleh; Dan-asabe, Bashar; Alabi, Abdulmumin Akoredeley
Journal of Sustainable Construction Vol 4 No 2 (2025): Journal of Sustainable Construction
Publisher : Universitas Katolik Parahyangan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26593/josc.v4i2.8867

Abstract

This study examines how renewable energy can be used in sustainable building projects in three major Nigerian cities: Lagos, Abuja, and Port Harcourt. It looks at the potential of solar panels (PV systems), wind energy, and converting biomass waste into energy to reduce both energy use and greenhouse gas emissions. To gather insights, the research involved interviews, site visits, and computer simulations using energy modelling software. The analysis included cost-benefit studies, sensitivity checks, and life cycle assessments to measure both economic and environmental outcomes. Results show that solar PV systems are the most efficient, cutting energy use by 25% to 35% and paying for themselves in 6 to 8 years. Biomass energy showed good potential in industrial areas, while wind energy is less common due to high upfront costs and slower returns. The study highlights key challenges such as high starting costs, limited technical skills, and weak enforcement of energy policies. To overcome these barriers, the paper suggests increasing financial support, strengthening policy implementation, investing in local skills development, and encouraging public-private partnerships to promote the use of renewable energy in Nigerian cities.
Life Cycle Assessment of Sustainable Building Materials in The Nigerian Construction Industry Unegbu, Hyginus; Yawas, Danjuma Saleh; Dan-asabe, Bashar; Alabi, Abdulmumin Akoredeley
Journal of Sustainable Construction Vol 4 No 2 (2025): Journal of Sustainable Construction
Publisher : Universitas Katolik Parahyangan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26593/josc.v4i2.8869

Abstract

This study presents a comprehensive life cycle assessment (LCA) of sustainable building materials in the Nigerian construction industry, focusing on bamboo, recycled steel, and low-carbon concrete. It evaluates the environmental impacts of these materials across their entire life cycles—from raw material extraction to end-of-life disposal. A mixed-methods approach was employed: primary data were collected via interviews and surveys with industry professionals, while secondary data came from credible literature and databases. Results revealed bamboo as the most environmentally friendly, with the lowest impacts on global warming, ozone depletion, eutrophication, and resource depletion. Low-carbon concrete also offered significant environmental advantages, particularly in reducing greenhouse gas emissions. Recycled steel supported circular economy goals but had higher energy demands and emissions due to its intensive recycling process. Key barriers to adoption in Nigeria included high upfront costs, limited local availability, and inadequate regulatory support. The study recommends strengthening regulatory frameworks, offering financial incentives, boosting local production, and promoting awareness through education and training. These findings underscore the potential of sustainable materials to reduce the environmental footprint of construction in Nigeria and offer practical guidance for policymakers, industry stakeholders, and researchers committed to advancing sustainability in the built environment.
Evaluating the Influence of Green Building Certifications on Construction Practices in Nigeria: A Systematic Review Unegbu, Hyginus; Yawasa, D.S.; Dan-asabe, B.; Alabi, A.A.
Journal of Sustainable Infrastructure Vol. 4 No. 1 (2025): Advancing Sustainable Infrastructure Through Innovation, Resilience, and Low-Ca
Publisher : Fakultas Perencanaan Infrastruktur, Universitas Pertamina

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61078/jsi.v4i1.31

Abstract

This research examines the influence of green building certifications on construction practices within Nigeria, concentrating on certifications such as LEED, EDGE, and BREEAM. Through a comprehensive review of literature spanning from 2015 to 2023, the study assesses the adoption of these certifications, the resulting changes in construction methodologies, and the economic and environmental impacts observed. The findings highlight a modest but increasing uptake of certifications, largely driven by adherence to international standards and emerging local efforts. In Nigeria, buildings that have achieved certification demonstrate notable advancements in energy efficiency, water use reduction, and waste management, contributing to greater sustainability and reduced operational expenses. Nonetheless, challenges such as substantial initial costs, a lack of adequately trained professionals, and insufficient governmental policies continue to impede progress. The research underscores the importance of enhanced governmental intervention, greater public education, and the growth of local industries focused on sustainable building materials. Upcoming research should explore the extended financial advantages of sustainable building methods, the challenges hindering their widespread implementation, and conduct comparative studies with other developing nations. This research provides important knowledge for policymakers, developers, and other key players dedicated to promoting eco-friendly building practices in Nigeria, aligning with international sustainability goals
Greening Nigeria’s Cities: A Case Study on Renewable Energy in Sustainable Urban Development Unegbu, Hyginus; Yawas, Danjuma Saleh; Dan-asabe, Bashar; Alabi, Abdulmumin Akoredeley
Journal of Sustainable Construction Vol 4 No 2 (2025): Journal of Sustainable Construction
Publisher : Universitas Katolik Parahyangan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26593/josc.v4i2.8867

Abstract

This study examines how renewable energy can be used in sustainable building projects in three major Nigerian cities: Lagos, Abuja, and Port Harcourt. It looks at the potential of solar panels (PV systems), wind energy, and converting biomass waste into energy to reduce both energy use and greenhouse gas emissions. To gather insights, the research involved interviews, site visits, and computer simulations using energy modelling software. The analysis included cost-benefit studies, sensitivity checks, and life cycle assessments to measure both economic and environmental outcomes. Results show that solar PV systems are the most efficient, cutting energy use by 25% to 35% and paying for themselves in 6 to 8 years. Biomass energy showed good potential in industrial areas, while wind energy is less common due to high upfront costs and slower returns. The study highlights key challenges such as high starting costs, limited technical skills, and weak enforcement of energy policies. To overcome these barriers, the paper suggests increasing financial support, strengthening policy implementation, investing in local skills development, and encouraging public-private partnerships to promote the use of renewable energy in Nigerian cities.
Life Cycle Assessment of Sustainable Building Materials in The Nigerian Construction Industry Unegbu, Hyginus; Yawas, Danjuma Saleh; Dan-asabe, Bashar; Alabi, Abdulmumin Akoredeley
Journal of Sustainable Construction Vol 4 No 2 (2025): Journal of Sustainable Construction
Publisher : Universitas Katolik Parahyangan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26593/josc.v4i2.8869

Abstract

This study presents a comprehensive life cycle assessment (LCA) of sustainable building materials in the Nigerian construction industry, focusing on bamboo, recycled steel, and low-carbon concrete. It evaluates the environmental impacts of these materials across their entire life cycles—from raw material extraction to end-of-life disposal. A mixed-methods approach was employed: primary data were collected via interviews and surveys with industry professionals, while secondary data came from credible literature and databases. Results revealed bamboo as the most environmentally friendly, with the lowest impacts on global warming, ozone depletion, eutrophication, and resource depletion. Low-carbon concrete also offered significant environmental advantages, particularly in reducing greenhouse gas emissions. Recycled steel supported circular economy goals but had higher energy demands and emissions due to its intensive recycling process. Key barriers to adoption in Nigeria included high upfront costs, limited local availability, and inadequate regulatory support. The study recommends strengthening regulatory frameworks, offering financial incentives, boosting local production, and promoting awareness through education and training. These findings underscore the potential of sustainable materials to reduce the environmental footprint of construction in Nigeria and offer practical guidance for policymakers, industry stakeholders, and researchers committed to advancing sustainability in the built environment.
Sustainable Concrete Solutions: Advancing Low-Carbon Infrastructure with Fly Ash in Nigeria’s Construction Industry Unegbu, Hyginus; Yawas, Danjuma S.
Journal of Sustainable Infrastructure Vol. 4 No. 2 (2025): Sustainable Infrastructure Breakthroughs: From Concrete to Circularity
Publisher : Fakultas Perencanaan Infrastruktur, Universitas Pertamina

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61078/jsi.v4i2.43

Abstract

The urgent environmental challenges posed by the high carbon footprint of ordinary Portland cement (OPC) demand sustainable alternatives in the construction industry. This study aims to evaluate the mechanical performance, durability, environmental impact, and economic feasibility of fly ash-based concrete as a partial replacement for OPC in Nigeria’s construction sector. Concrete mixtures with 20%, 40%, and 60% fly ash replacement were prepared and tested for compressive strength, workability, chloride penetration resistance, sulfate resistance, and water absorption. Advanced life cycle assessment (LCA) and economic analyses were conducted to quantify environmental benefits and cost savings. Results indicate that early-stage compressive strength decreases with increasing fly ash content due to slower pozzolanic reactions; however, significant strength gains occur at later curing stages, with 90-day compressive strengths reaching up to 42 MPa for 40% fly ash mixtures. Durability improvements were demonstrated by a 50% reduction in chloride permeability and a decrease in sulfate-induced mass loss from 0.7% to 0.2% at 60% fly ash replacement. The LCA revealed a reduction in CO₂ emissions by up to 51%, while economic analysis showed cost savings of up to 20% compared to conventional OPC concrete. These findings confirm that fly ash-based concrete provide enhanced durability and substantial environmental and financial advantages, making it a viable, sustainable alternative for construction in Nigeria. However, challenges such as supply chain constraints, quality control, and limited industry awareness must be addressed to enable widespread adoption. Future research should focus on improving fly ash reactivity, exploring hybrid supplementary cementitious materials, and conducting long-term field performance studies to further optimize and validate fly ash concrete applications under local climatic conditions.
Co-Authors Alabi, A.A. Alabi, Abdulmumin Akoredeley Dan-asab, B. Dan-asabe, B. Dan-asabe, Bashar Yawas, D.S. YAWAS, Danjuma Yawas, Danjuma S. Yawas, Danjuma Saleh Yawasa, D.S Yawasa, D.S.