Construction Research Journal

AN EVALUATION OF THE IMPACT OF FLOODING ON REAL ESTATE VALUE IN LAGOS ISLAND- (2007-2024)

Esther Thontteh — Fri, 30 May 2025 00:00:00 +0000

Purpose: This study aimed to quantitatively assess the long-term consequences of flooding on real estate values in Oniru and Lekki Phase 1, Lagos, Nigeria, between 2007 and 2024.

Methodology: The population considered for the study was practicing Estate Surveying and Valuation firms within the study area in Lagos State. A systematic random sampling technique was adopted to administer questionnaire to a sample size of 55 for the study; out of which 48 were retrieved, representing 87% response rate. Data was analyzed using descriptive statistics, mean item score, trend analysis and linear regression model.

Findings: The study explored the degree of influence of flood occurrence on land and building value in the study area. Empirical findings showed that similar to Oniru, Lekki Phase I shows a positive trend in rental values, indicating that the area remains attractive despite flooding risks. Oniru further demonstrates resilience to flooding impacts, maintaining an upward trajectory in rental values. However, the impact on land value and traffic are severe.

Implications: The study reveals that, though flooding events have had a negative impact on property values in the short term, the long-term trend suggests resilience in both Oniru and Lekki Phase 1. It therefore emphasizes the need for robust flood management strategies, including improved drainage systems and embankments to prevent property value loss and man-hour loss in traffic. Policymakers, builders and urban planners should prioritize investments in infrastructure and community resilience to mitigate the adverse effects of flooding. Additionally, property owners, investors and the construction industry should consider the long-term implications of climate change, and incorporate flood risk into their decision-making processes.

Originality/Value: This study contributes to the growing body of literature on the impact of natural disasters on real estate markets, particularly in Victoria Island and Lekki Phase 1. The study has further shown the spatial variations of flooding impact on different areas, indicating the level of vulnerability of the different locations and impact on property values. It has also shown the long- and short-term effect of flooding, and the overall resilience of the real estate market in the study location.

UNSAFE AND UNHEALTHY BEHAVIORAL PRACTICES OF NIGERIAN CONSTRUCTION WORKERS IN SMALL AND MEDIUM-SCALE CONSTRUCTION FIRMS

Pamilerin Sanni, Patricia Kukoyi, Olajide Faremi — Fri, 30 May 2025 00:00:00 +0000

Purpose: The construction industry in Nigeria operates in a multifaceted environment, involving different individuals performing varying tasks. Many of the workers, particularly in small or medium-scale construction firms, often engage in unsafe and unhealthy behavioural practices. This study sought to evaluate the behaviours, and the key factors influencing them in the construction firms in Lagos State, Nigeria.

Methodology: This study employed a survey research method, utilizing a convenience sampling technique to select the target respondents for questionnaire administration. A total number of 192 copies of a questionnaire were distributed, resulting in 84% response rate, as 161 copies were fully completed and returned. The collected data were analyzed using both descriptive and inferential statistical methods.

Findings: The findings of this study confirm the occurrence of unsafe and unhealthy behavioural practices among construction workers in Lagos State, Nigeria. The results identify common unsafe practices such as poor housekeeping, failure to maintain or service machinery, the use of unsafe scaffolding or equipment, neglecting personal protective equipment, and disregarding supervisors' instructions during task execution. Additionally, factors such as drug and alcohol addiction, overconfidence, ignorance, stress, and inexperience were identified as major contributors to such behaviours among construction workers in Lagos State.

Practical Implications: The health and safety of construction workers are of utmost importance to all stakeholders in the construction industry. This study reveals the wide spread nature of the unsafe and unhealthy behaviours among workers, as well as the key factors contributing to them.

Originality/value: The study contributes significantly to understanding the causes of risks, accidents, and injuries on construction sites by identifying unsafe and unhealthy behavioural practices among construction workers. Recognizing these practices and the factors influencing them provides construction stakeholders and shareholders with the rationale to develop sustainable and feasible health and safety measures aimed at eliminating accidents on construction sites.

INNOVATIVE TECHNOLOGIES FOR CONSTRUCTION HEALTH AND SAFETY ON CONSTRUCTION SITES IN LAGOS STATE: AWARENESS AND ADOPTION

Oluwafemi Odunlami, Patricia Kukoyi — Fri, 30 May 2025 00:00:00 +0000

Purpose – Construction sites are accident-prone, and construction workers are vulnerable to accident or mishaps; hence, the need for interventions through the emerging technologies in construction health and safety (CHS) in Lagos, to enhance technological implementation to improve worker safety and operational efficiency on construction sites.

Methodology - The quantitative research approach was employed, focusing on gathering numerical data via structured questionnaires to analyze the level of awareness and adoption of innovative technology in CHS. Questionnaires were distributed to 200 construction professionals, including Builders, Civil engineers, Architects, H&S officers, and Quantity surveyors. The convenience sampling technique was utilized to ensure that the required sample was harnessed. The data was analyzed using descriptive and inferential statistics, the Relative Importance Index (RII) and Krustal-Wallis was used to assess the perceived importance of awareness and adoption levels of various innovative technologies.

Findings - Key findings reveal that Building Information Modeling (BIM) is the most widely recognized innovative technology in CHS, and that Drones and Artificial Intelligence (AI) have a moderate level of awareness among industry professionals; Whereas, awareness of 3D Printing, Internet of Things (IoT), Robotics, Wearable Technologies, Virtual Reality (VR), Mobile Applications, and Augmented Reality (AR) remains low, probably due to barriers such as high implementation costs, limited collaboration and communication among stakeholders, and limited access to training.

Research Limitation – The research was limited to Lagos, and did not secure enough evidence to generalize the findings.

Theoretical Implications – This study contributes to the body of knowledge on technology adoption in CHS, providing empirical evidence on the gaps between awareness and adoption. It underscores the need for tailored interventions and policies to promote technology integration. The research also hints on strategies for improving H&S outcomes, reducing accidents and promoting workers’ well-being.

Originality – The study concluded that a moderate negative relationship exists within the variables. This suggests that a high level of awareness of a technology does not necessarily correlate with its adoption.

FACTORS AFFECTING MAINTAINABILITY OF MASS HOUSING UNITS IN LAGOS STATE

Olajide Faremi, Alice Akintola — Fri, 30 May 2025 09:06:49 +0000

Purpose: Mass housing units are susceptible to defects and varied degrees of deterioration; hence, this study examined factors affecting the maintainability of mass housing units in Lagos State.

Methodology: The study employed a quantitative research approach. Primary data were collected through a cross-sectional survey of facility managers and owners/users of mass housing units in the study area. A structured questionnaire was administered to respondents, and the data collected were analyzed using descriptive and inferential statistical tools.

Findings: The results indicated that the predominant factors affecting the maintainability of mass housing units include accessibility to building systems and utilities, availability of maintenance records and resources, and availability of spare parts. The study also revealed that there was no significant difference in the way facilities managers and users perceive the factors affecting maintainability of mass housing units, except in considering the complexities of building designs as one of such factors.

Practical Implications: The study established the factors affecting maintainability of mass housing units that could serve as value-adding information to stakeholders within the mass housing delivery value chain. The findings also provide operational considerations such as the digitalization of project documents and maintenance records for the production of more resilient and sustainable mass housing projects.

Originality/Value: The study particularly focused on the maintainability of various categories of mass-produced housing estates, which is a paradigm shift from most previous studies that lumped up buildings irrespective of their ownership characteristics.

VIABILITY OF COMBINING WATER REDUCING ADMIXTURES AND WATERPROOFING ADMIXTURES IN CONCRETE

Ayobami Sonibare , John Ameh, Oladipupo Osanyin — Fri, 30 May 2025 09:22:04 +0000

Purpose

This research aimed to investigate the effect of incorporating two admixtures, Costamix-R200 (a water-reducing admixture) and Hydropruf-WP-300 (a waterproofing admixture), into concrete mixes to optimize performance and mitigate the impact of imbalanced water content on concrete’s mechanical properties.

Methodology

A full factorial experimental design was implemented, including tests to determine the concrete’s strength, workability, and water absorption properties. Four mix designs were analyzed: a control mix (Mix 1) and three variations with the admixtures (Mix 2, 3, and 4), all using a 1:2:4 mix ratio and a 0.55 water-cement ratio.

Findings

The control mix (Mix 1) met ACI 318 requirements for M15 concrete, achieving a compressive strength of 21.0 N/mm² at 28 days. Mix 2, with Hydropruf-WP-300, showed a strength of 16.0 N/mm², while Mix 3, with Costamix-R200, reached 17.0 N/mm² at 28 days. The highest strength, 23.1 N/mm², was observed in Mix 4, which incorporated both admixtures. Additionally, higher density was correlated with increased compressive strength.

Practical implications

The study offers valuable guidance for the judicious use of water-reducing and waterproofing admixtures in concrete mixes, providing insights into their role in optimizing strength, durability, and workability for various construction applications.

Originality/value

This research contributes novel findings on the synergistic effects of combining water-reducing and waterproofing admixtures to improve concrete properties, offering practical recommendations for enhancing concrete performance in construction.

INVESTIGATING GREEN BUILDING CONSIDERATION IN THE DESIGN AND CONSTRUCTION OF PROJECTS IN LAGOS STATE.

Timothy Okonkwo, John Ameh — Fri, 30 May 2025 09:42:08 +0000

Purpose: The construction industry in Lagos State struggles with unsustainable practices that contribute to environmental degradation. This study is important as it highlights the need for green building practices to promote sustainability in the Lagos State construction sector. This study aims to assess the level of awareness, implementation, and challenges of green building practices in the Lagos State construction industry. The goal is to promote environment-friendly practices in the region.

Methodology: A quantitative research design was employed, utilizing a simple random sampling method to administer 150 close-ended questionnaires to construction professionals in Lagos State. The study achieved an 81% response rate, with 121 participants.

Findings: The findings reveal a moderate level of awareness of green building practices among construction professionals in Lagos State. However, there is a noticeable discrepancy with a low prevalence of actual implementation and green retrofitting in building projects across the region. Key drivers for green building practices include government regulations, economic benefits, environmental concerns, technological advancements, and social responsibility. The study identifies several barriers hindering the widespread adoption of green building practices, such as infrastructure challenges, limited availability of green materials, skilled labour shortages, perceived risks, and concerns about greenwashing.

Practical Implications: The study recommends increased efforts in awareness, education, and advocacy for sustainable construction practices in Lagos State. Addressing these challenges and capitalizing on opportunities can contribute to the promotion of environment-friendly construction in Lagos State. The findings emphasize the potential for improved environmental outcomes and public health through the adoption of these practices.

Originality/Value: This study provides valuable insights into the current state of green building practices in the region, highlighting the complexities and opportunities in transitioning to sustainable construction methods.