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Civil and Sustainable Urban Engineering

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Keyword = Nigeria
Journal = Civil and Sustainable Urban Engineering
Found 7 items.
Open Access
Internal Stakeholders’ Contribution to Building Collapse in Lagos State, Nigeria: A Perceptual Survey
by Olumide Afolarin Adenuga, Innocent Chigozie Osuizugbo, Ikhelo Benedict Imoesi

Civil Sustain. Urban Eng. 236 views
Building collapse is a universal problem that has resulted in disruption, loss of lives and capital costs, as well as negatively affecting the image of the construction industry and its practitioners. The current study seeks to achieve the following objectives: (i) to assess the contributing factors of internal stakeholders to building collapse due to challenges faced in Lagos state, Nigeria; (ii) to determine the remedies to challenges faced by internal stakeholders towards reducing the spate of building collapses in the study area. The study adopted a survey research method. Questionnaires were administered to purposively selected internal stakeholders in the Nigerian construction industry within Lagos state. 127 questionnaires were administered to survey participants. The data collected was analysed using descriptive and inferential statistics. The results revealed a lack of consideration of life cycle costing of utilities, lighting and lifts; lack of proper integration and coordination of design elements; failure to consider the buildability and maintenance requirements during the design; absence of proper supervision and site inspections for quality checks; and failure to inspect materials storage on site, with their mean scores of 4.18, 4.11, 4.10, 4.10, and 4.10, respectively, as the top five contributing factors of internal stakeholders to building collapse in Lagos state. The study provided in-depth insight into the contributing factors of internal stakeholders to building collapse that can help construction professionals and stakeholders facilitate the development of strategies required to minimize the contributing factors of internal stakeholders to building collapse in the construction sector. Full text

Open Access
Maintenance Management Practices and Factors Affecting Maintenance of Private University Buildings in Ogun State Nigeria
by Innocent Chigozie Osuizugbo, Babajide Oludayo Olusanya

Civil Sustain. Urban Eng. 164 views
Building maintenance management is an efficient and viable technique used for addressing issues with construction's upkeep. Nigerian tertiary institutions have been accused of lacking maintenance culture. Meanwhile, quality and sustainable education is delivered when educational buildings are adequately maintained. The present study seeks to investigate the factors affecting maintenance management of private university buildings in Ogun state Nigeria. Questionnaire survey was utilized as a research instrument to gather information from the maintenance personnel within private universities in Ogun state, Nigeria. The data analysis techniques used were descriptive and inferential statistics. The results revealed that use of poor quality components and materials,no adoption of appropriate maintenance cycle for building maintenance, lack of discernable maintenance culture in the country, and inadequate training and development of maintenance personnel are the top most four factors affecting maintenance management of private university buildings in Ogun state, Nigeria. The study provides insights into the factors affecting maintenance management of university buildings. An understanding of these factors would help tertiary institutions and maintenance personnel facilitate the development of strategies required in minimizing the factors affecting maintenance management practices in tertiary institutions. Full text

Open Access
Chemical and Mechanical Characterisation of Clay Soil Stabilised with Steel Slag and Calcium Carbide Waste
by Damilola Ayodele Ogundare, Oyetunde Oluwafemi Adeleke, Ayodeji Theophilus Akinbuluma

Civil Sustain. Urban Eng. 7 views
Problematic subgrade soil such as clay is expansive by nature and is challenging to work with during pavement construction. In an effort to combat this issue and lower the rate of pavement failure on highway construction projects, cementitious industrial waste materials should be used. This study thus examined the influence of steel slag (SS) and calcium carbide waste (CCW) as stabilisers for clay soil. Chemical and mineralogical analyses of clay soil, SS and CCW were assessed while the stabilised soil were subjugated to Atterberg limit, compaction and california bearing ratio (CBR) tests. The existence of calcium oxide, iron oxide and calcium hydroxide in both the chemical and mineralogical constituents of SS and CCW indicate that they are binding materials which notably influences hardness and contributes more to the strength of the clay soil. With varied amounts of the additives (SS and CCR), the clay soil's liquid limit and plasticity index dropped from 54.0% and 13.8% to 43.5% and 9.2%, respectively. This significantly lowers the clay soil’s swell potential, increases its resilience, and decreases its infiltration capacity. The compaction characteristics revealed that SS and CCW enhanced the compactness of the clay soil signifying enhancement of the soil compaction properties. The CBR value of all the stabilised clay soils improve significantly with 40%SS + 60%CCW acquiring the maximum CBR of 17.3% and 29.0% compared with clay soil having CBR of 4.7% and 6.9% in soaked and unsoaked states respectively. Full text

Open Access
Inhibitors to Earth-based Materials Adoption in Urban Housing Construction: The View of Design Experts
by William Nwaki, Onyinye Sofolahan, Emmanuel Eze

Civil Sustain. Urban Eng. 83 views
Earth-based materials are eco-friendly and harmless to the environment but have been neglected and relegated, and preference is given to non-sustainable and expensive conventional materials owing to certain factors. Existing studies in the Nigerian context did not consider the factors hindering the use of earthen materials in urban low-cost housing production. This study presents the outcome of examining the inhibitors to the adoption of earth-based materials in urban housing construction from the perspective of design experts in a developing country like Nigeria. Thus, it fills the critical literature gap in the Nigerian context. A well-structured quantitative questionnaire was utilised to collect data from construction design experts using the snowball sampling technique via electronic means. With a reliability index of 0.899, The gathered data were analysed using frequencies, percentages, Mean score, normalisation value technique, Mann-Whitney U test, overlap analysis, and exploratory factor analysis (EFA). It was found that the major barriers to the use of earth materials in urban housing production are (i) image and aesthetic barriers, (ii) Knowledge and resistance barriers, (iii) technology and data barriers, (iv) strength and maintenance barriers, and (v) demand and demographic barriers. More training and workshops were advocated to increase knowledge of the environmental and economic benefits of these materials among stakeholders to influence their interest and the market for earthen materials' acceptability and usage in housing production in urban areas. Full text

Open Access
Assessment of Maintenance Management Practice in Government-owned Tertiary Institution
by Lucky Azubike Osuya, Olumide Afolarin Adenuga, Olalekan Shamsideen Oshodi

Civil Sustain. Urban Eng. 369 views
The state of utilities and infrastructure within an academic institution plays a vital role in learning and the development of human capital. Hence, this study seeks to examine the management practices used in maintaining facilities in a government-owned tertiary institution and then examine the conditions of critical facilities and their related services in the institution. To achieve the study's goal, a questionnaire survey approach was used to collect information about users' and property managers' perceptions of maintenance management practices. The results revealed the existence of a maintenance policy covering critical systems and services. The discovery also implies that maintenance tasks are generated and planned in response to inspections and user requests. Respondents' perceptions of the state of facilities and utilities indicate that they are in good condition. While literature shows school infrastructure issues remain an ongoing concern, the majority of respondents affirm security and electricity as the most important critical infrastructure and services in the institution, amongst others. The most important limitation of the current study lies in the fact that the findings may not be generalizable to other tertiary institutions in Nigeria. Hence, more research needs to be done in order to gather more information about maintenance management practices in public universities and other educational institutions to improve critical facilities and services to enhance learning outcomes. Full text

Open Access
Utilization of Green Material for Concrete in Construction
by Wei Sheng Choong, Jian Chong Chiu, Flavio Lopez-Martinez, Abdullah Alaklabi, Mariana Claudia Oliveira, Surya Dewi Puspitasari, Julius Adebayo

Civil Sustain. Urban Eng. 299 views
In this modern technological era today, green materials are highly regarded as one of the most important elements when designing and conducting an environmentally sustainable construction project. The cement that is utilized in conventional concrete today is one of the culprits for the high levels of carbon dioxide generated, which is damaging to the environment. Many researchers have shown and suggested that cement substitution is a favorite technique for minimizing the generation of greenhouse gas (GHG) emissions as well as substituting unused raw materials with concrete. The concept of green concrete promotes sustainable development as it utilizes the least natural resources during production and mainly depends on recyclable waste materials as its main raw material. This paper displays the various designs of green concrete in developed countries by partially replacing cement with recyclable materials such as fly ash, demolished waste from construction sites, electronic waste, carpet fiber waste, palm oil fuel ash, and others. Green concrete endorses the innovative and sustainable use of waste aggregate and unconventional alternative materials to substitute cement within concrete. It is crucial to adopt the use of green concrete, especially in developed countries, as they have the capacity and financial strength to ensure adequate training, public awareness, further research and demonstration projects, as well as suitable standards to be applied to endorse the global application of green concrete in infrastructure projects. Full text

Open Access
Rejuvenating the Market for Earth-Based Building Construction Materials in a Developing Economy
by William Nwaki, Emmanuel Eze

Civil Sustain. Urban Eng. 191 views
Earth-based materials are useful in building and engineering construction projects globally, but they have largely remained unextracted and wasted, and their use has been limited to rural areas and avoided in modern buildings in the cities. The sustainability market in developing countries is still largely unsaturated and undertapped. This situation is blamed on lack of knowledge of the potential, benefits, and characteristics of green and sustainable building materials. This study aimed at determining the benefits of earth-based materials that could lead to the rejuvenation of the market for their adoption in building construction projects in the urban areas of a developing economy. The study adopted a structured questionnaire administered via electronic means to construction experts using the snowball sampling technique in Nigeria. With a response rate of 62.94% and a reliability index of over 0.90, the gathered data were analysed using frequency, percentage, and exploratory factor analysis (EFA). The study revealed that the main clusters of benefits of earth-based materials that can stimulate the market for these materials in urban areas are "cost and pollution-related benefits," "emissions and environmental benefits," "waste and workability benefits," "sound and fire-related benefits," and "thermal insulation and resource efficiency." The study recommended that housing investors, clients, and stakeholders should capitalise on the availability of large quantities of earthen materials to improve the quantity of housing provisions in cities and urban areas. Full text

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