Department of Building Technology

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Start date: 2020Has files: Yes

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    EVALUATION OF DIGITAL TOOLS IMPLEMENTATION IN CONSTRUCTION MANAGEMENT FOR PROJECT DELIVERY IN LAGOS STATE
    (Covenant University, Ota, 2026-07) HABU, Shadrack Alhamdu; Covenant University, Dissertation
    Construction industries around the world have benefited from digital tools, including Building Information Modeling (BIM), Artificial Intelligence (AI), Internet of Things (IoT) gadgets, cloud-based systems, mobile technologies, unmanned aerial vehicles (drones), and virtual or augmented reality. In Nigeria, particularly in Lagos State, there is low usage of these tools, resulting in delays, budget overruns, poor project outcomes, and health and safety issues. This study sought to investigate how digital tools have been implemented in construction management practice in Lagos State to help develop an implementation strategy that can guide future use of these tools. The methodology adopted was a quantitative survey design. Structured questionnaires were distributed to a stratified sample size of 250 professionals in construction management practice in Ikeja, Victoria Island, and Lekki, 219 of which returned valid responses, and analyzed using descriptive statistics, relative importance index, Pearson correlation, and regression analysis. There is some level of awareness, but not necessarily of consistent use of digital tools by professionals involved in construction management. Awareness of digital tools had a significant relationship with adoption (r = 0.380, p < 0.001), while adoption had a significant relationship with performance (R² = 0.148, p < 0.001). However, when the drivers and barriers identified by the study (twelve drivers and sixteen barriers) are collectively evaluated against adoption behavior, the collective effect is not significant (p = 0.352), although they are perceived as important factors by professionals. There is also an influence of digital tools on project performance in time, cost, quality, and safety aspects of the construction projects, as perceived by professionals. Based on the findings, the study recommends the ADAIP implementation strategy -Awareness, Decision, Adoption, Integration, and Performance as a sequential guide for professionals implementing digital tools in the construction industry in Lagos State. Keywords:
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    DEVELOPMENT OF COCOA POD HUSK ASH (CPHA) BASED CEMENT MATRIX FOR LOW-COST HOUSING
    (Covenant University, Ota, 2026-07) UZOMA, Chidera Clinton; Covenant University, Dissertation
    The persistent housing deficit in Nigeria, coupled with the escalating cost of Portland Cement (PC), necessitates the development of sustainable and cost-effective alternative binders. This study investigates the combined use of Cocoa Pod Husk Ash (CPHA) and Calcium Carbide Waste (CCW) as supplementary cementitious materials (SCMs) for low-cost housing, in comparison with established agro-waste SCMs such as Rice Husk Ash (RHA) and Palm Oil Fuel Ash (POFA). Laboratory analyses were conducted to evaluate the physicochemical and mechanical properties of CPHA and CCW in accordance with ASTM C618 standards. Results indicate that both materials satisfy key physical requirements, with fineness of 10% passing 45 μm and normal consistency values of 33.3% (CPHA) and 34% (CCW). Blended CPHA–CCW mortars exhibited decreasing workability with increasing CCW content, while setting times increased progressively due to higher lime concentration. Among the mix ratios investigated (60:40 to 35:65), the 55:45 CPHA–CCW blend demonstrated the most balanced performance, exhibiting adequate workability (65 mm slump flow), moderate setting time (135 min initial; 273 min final), and superior compressive strength development over curing periods. Comparatively, this optimal ratio performs competitively with conventional SCM systems at 20–30% replacement levels, highlighting the synergistic interaction between silica-rich CPHA and calcium-rich CCW. However, the relatively low silica content of CPHA suggests the need for improved calcination to enhance reactivity. Overall, the study establishes that a 55:45 CPHA–CCW blend is the most effective proportion, offering a viable, eco-friendly alternative to PC while supporting sustainable construction and circular economy practices in Nigeria.
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    INVESTIGATION OF INFLUENCE OF CALCINED CLAY AND RICE HUSK ASH ON THE PROPERTIES OF SELF COMPACTING CONCRETE
    (Covenant University, Ota, 2026-06) AREMU, Ayodeji Emmanuel; Covenant Unversity, Dissertation
    The growing need for environmentally friendly building materials has led to the research on supplementary cementitious materials (SCMs) as substitutes for the ordinary Portland cement (OPC) used in concrete. This research explores the impact of calcined clay (CC) and rice husk ash (RHA) on the fresh, mechanical and durability characteristics of self-compacting concrete (SCC). This research aims to assess the potential of these readily available materials for improving sustainability without compromising the performance of SCC. Different mixes of SCC were prepared with varying percentages of cement replaced by calcined clay (0-30%) and rice husk ash (0-20%). The rheology of the concrete was measured using standard SCC tests such as slump flow, V-funnel, and L-box tests, to evaluate the filling ability, stability and passing ability of the concrete, respectively. The hardened properties were assessed by compressive strength at various ages and the durability of the concrete was investigated by water absorption and abrasion tests. The findings suggest that using calcined clay at reasonable replacement levels enhances cohesiveness and stability of SCC while maintaining workability. But the addition of rice husk ash adversely affected workability due to the increased specific surface and demand for water. Specimens with an RHA content greater than 5% showed poor workability and did not meet the criteria for SCC. When it came to strength, compressive strength decreased as the amount of calcined clay and rice husk ash increased. However, SCC with up to 20% calcined clay showed a significant portion of the control compressive strength, suggesting the possibility of using the calcined clay as a cement replacement. Moreover, higher rice husk ash content caused considerable loss of strength, due to higher porosity and reduced effectiveness of hydration. In terms of durability, water absorption showed a progressive increase with increasing replacement, suggesting increased permeability. Abrasion resistance also dropped with higher SCM levels, indicating a loss of surface quality. However, the durability of the mixes with moderate calcined clay content and low rice husk ash content showed satisfactory results, indicating a compromise between sustainability and performance. The research concludes the best results for SCC with calcined clay and rice husk ash is with around 20% CC and 5% RHA recording a 28-day compressive strength of 19.69MPa (77.2% Strength Retention) compared to the control mix which achieved a 28-day compressive strength of 25.49MPa. Here, the concrete retains xviii satisfactory workability, strength and durability, and minimises cement use. The study underscores the need for proportionate material replacement, and offers guidelines for the eco-efficient design of SCC with local materials. This study contributes to sustainable construction by showing the viability of using calcined clay and rice husk ash as supplementary binders in SCC. It also offers guidelines for optimising mix designs and suggests future research directions, such as long-term behaviour and microstructure studies.
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    Influence of Industry 4.0 Applications on Covid-19 Pandemic in Managing Materials, Human Resources and Completion Time of Construction Projects
    (Praise Worthy Prize S.r.l., 2024) Amusan, Lekan; Odusola, Mojisola; Aigbavboa, Clinton; Ajao, Ayodele Christianah
    This research was centered on the influence of Industry4.0 in effective management of Covid-19 pandemic on construction sites and materials and resources of construction projects on construction sites. This study aims to increase sensitization about the COVID-19 pandemic's influence on the construction industry. For this research work, 80 questionnaires were administered to selected construction sites in the areas with highest incidence of Covid-19 in South Western Nigeria (Lagos State). The influence, effect, and strategies adopted using Industry4.0 apparatus The structured questionaire designed in Likert scale was distributed to respondents. The collated questionaire was test for validity and reliability and was found to be in good order. Spearman ranking, ANOVA, Mean item scores and relative agreement tools were used to process the data. It was discovered that Industry 4.0 tools were of good help during the pandemic in allocation, distribution and curation of information and resources. It was also discovered that COVID 19 posed a lot of challenges in administering human resources personnel while companies suffered procurement of effective human resources, low productivity and casualties while the pandemic lasts. The study however recommended intense use of the Industry4.0 tools in construction process administration even in the advent of Zero Covid 19 incidence on sites.
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    Chapter 19: Stress Management in Construction: A Driver of Construction Health, Safety, and Wellbeing Improvement
    (Taylor & Francis, 2024) Amusan, Lekan; Gold Essien Enang,; Aigbavboa, Clinton
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    Education and Training in the Technological Era: Adopting the Head, Heart, and Hand Approach for Effective Social Media Usage
    (AHFE International, 2024) Amusan, Lekan; Aigbe, Fortune; Aigbavboa, Clinton; Idowu, Ayobami
    The various industrial revolution from the first industrial revolution birthed water and steam-powered manufacturing facilities, the second industrial revolution birthed electrically powered mass production, the third industrial revolution led to the birthing of computers and Robots, while the fourth industrial revolution welcomed Cyber physical systems and the internet. The advent of computers and the internet has led to the use of social media platforms such as Facebook, Twitter, and Instagram, which can be used for work and for communication. The workers who will need these platforms will be those who are already employed, as well as those who need to be employed Hence, requisite skills (which could be both hard and soft) are required to use these platforms effectively. This study is based on the use of secondary data sources such as articles and journals using inductive and semantic approaches and thematic analysis. The study aims to promote the effective utilization of social media for work and communication through the Head, Hand, Heart Approach to Education and Training. The study reveals that the Head and Hand approach, which is cognitive learning and practical doing, provides the workers with the necessary hard skills to use social media. The Heart approach, which is affective learning, relational knowing, and emotional involvement, provides workers with the necessary soft skills to use social media for communication. The study contributes to scholarly discussions on workforce education and training in the digital era, as well as empirically contributes to the effective management of the workforce of the future.
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    Gig Regulation: A Future Guide for the Construction Industry
    (MDPI, Basel, Switzerland, 2025) Amusan, Lekan; Aigbe, Fortune; Aigbavboa, Clinton; Aliu, John
    Technology has led to the advent of digitally enabled workforces like the gig workforce, but a number of issues confront this workforce. This study aims to identify the various issues facing the gig workforce as well as the regulatory measures and regulatory interactions proposed to guide stakeholders in addressing these challenges. This study is a review, with the methodology primarily based on secondary sources of data collection like journals and articles. This study reveals that the construction industry is not immune to the use of the gig workforce, as it often performs project-based construction work, jobs requiring highly specialized skills and commodity service jobs. This study also reveals that the gig workforce is confronted with primarily gig economy-induced platform-based challenges, such as the new nature of work, i.e., exploitative, precarious, and dangerous labour. Furthermore, this study also reveals that these issues can be addressed primarily through regulatory means and regulatory interactions between proposed regulatory measures and existing labour laws, which could be by Coordination, Competition, etc. This aligns with SDG 8, i.e., Decent Work and Economic Growth, as concerns issues related to their benefits, and SDG 10, i.e., Reduced Inequalities, as concerns issues related to their employment relations. The implication of this study for construction stakeholders relates to the development of new regulations and providing a valuable tool for analysing regulatory landscapes and understanding the dynamics of regulatory change, which contributes to scholarly discussions on fair labour practices and the protection of gig workers and helps inform policymaking that will help attract, motivate, retain, and engage more gig workers in the construction industry, which will foster proper workforce management.
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    Adoption and Barriers of Engineered Bamboo Products in the Nigerian Construction Industry
    (Horizon Research Publishing (HRPUB), 2025) Amusan, Lekan M.; Ojelabi, Rapheal A.; Omuh, Ignatius O.; Ogunrinde, Olugbenro
    The rise in the cost of conventional construction materials and the greenhouse effect from construction activities have been an issue of concern to stakeholders in the construction industry. Hence, efforts have been concentrated on developing low-cost, environmentally friendly and sustainable local materials to mitigate the greenhouse effect. The quest for the sustainable materials necessitates the study to examine the prospects of adoption of engineered bamboo products and the challenges militating against its use among construction professionals. A quantitative approach was adopted and 70 questionnaires were distributed among construction professionals with structural engineering background in selected firms across Lagos State. Data collected were processed using percentage, mean item score and KruskalWallis’s test. Facts garnered from the study revealed that engineered bamboo adoption for construction related works like ceiling, flooring, and reinforcement among others is not outstanding. The poor implementation of the engineered bamboo products is attributed to some challenges which include ‘high affinity for conventional materials’, ‘unavailability of bamboo products’ and ‘lack of machinery to refine raw bamboo’ among others. Therefore, the study recommends that stakeholders need to channel more resources into research and development and creating an enabling policy that can enhance the bamboo products adoption.
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    THE EFFECTS OF PSYCHO-SOCIAL FACTORS ON CONSTRUCTION EMPLOYEE PERFORMANCE
    (Cape Coast Technical University in Ghana, in collaboration with Arca Academic Ltd, 2026) Amusan, L.; Aigbavboa, C. O.; Jegede, O.; Ojelabi, R; Aderounmu, P.
    Purpose: The aim of the study was to assess the Influence of psychosocial factors like competence, emotional intelligence, and education on construction firms' employees, with a focus on improving their performance on the construction site. Design/Methodology/Approach: This study adopted a quantitative descriptive survey research design. A random sampling method was used to select 20 medium-sized construction companies and 100 respondents. 100 questionnaires were administered. Analysis of Variance tool [ANOVA]. The relative agreement index technique was used to analyse the data. Findings: The findings provide a comprehensive, empirically grounded understanding of the multidimensional nature of employee performance in the construction industry, highlighting the interplay among psychosocial, organisational, environmental, and socioeconomic factors in determining on-site performance. Research Limitation: The study focused exclusively on medium-sized construction companies, thereby excluding small- and large-scale construction firms. This restriction limits the comprehensiveness of the findings, as the organisational structures, resource capacities, workforce compositions, and operational practices of small and large construction firms may differ considerably from those of medium-sized companies. Practical Implication: It provides guidelines for project managers and professionals on understanding the following as a key requirement to improve on-site output: Wages should be paid on time, allowing construction workers to participate in professional conferences, which also greatly helps improve competence. Social Implications: The deployment of financial and non-financial incentives can induce higher performance by meeting workers' social needs. Originality and Value: The findings of this study firmly establish that emotional intelligence is not a peripheral or incidental factor in construction employee performance but rather a foundational psychosocial competency that underpins goal achievement, teamwork, and professional resilience on construction sites.
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    Bibliometric Analysis of Literature on Smart Technology Integration in the Construction Industry
    (IOP Publishing, 2024)
    Globally, the construction industry is experiencing a significant increase in new technologies due to transitioning from traditional methods to digital technologies. The construction industry is utilizing advanced digital technologies to reduce operational inefficiencies. Soaring demand for homes is exposing the limitations of traditional construction methods. The study aims to analyze research trends in smart technology integration in the construction industry through bibliometric analysis. The Scopus database results were extracted with VOS Viewer. The study examined 19,225 papers on “Smart Construction,” narrowing it down to 588 suitable for review based on criteria such as subject area, publication type, etc. The United Kingdom, the United States, and Hong Kong produced the most impactful research. The countries with the most smart construction publications are the Russian Federation, China, the United Kingdom, and the United States. The most cited publications were review-based and focused on blockchain, sustainable infrastructure, digital construction, etc. The work explicitly highlights the overview of the technologies being used in smart construction practices. This study aids researchers and built environment professionals in comprehending the integration of smart technology in the construction sector by offering baseline data for future research. The study suggests the need for case study-based research to understand better the practical application of smart technology in the construction sectors, thereby enabling further trend analysis. This study’s findings can help enhance efficiency and sustainability in future construction research and development.