Lekan Amusan

Data exploration on factors that influences construction cost and time performance on construction project sites

This data article explores the factors that contribute to maintaining steady cost projection on construction projects. The data was obtained using structured questionnaire designed in Likert scale. The responses were solicited from category of construction practitioners. Simple random sampling was employed in the distribution of the questionnaires to the respondents. Data samples were analysed using severity index, ranking and simple percentages. The analysis of the data brought to fore some important data on factors that causes cost overrun, they include: contractors inexperience, inadequate planning, inflation, incessant variation order, and change in project design. They are critical to causing cost overrun, while project complexity, shortening of project period and fraudulent practices are found to be responsible. The data fall within the percentages of possible consequences of cost overrun when compared with those available in scientific literature. The data can provide insights on how to mitigate the risks of project deviation from initial cost and as-built project.

Water conservation within planetary boundaries: residents’ perception of recycled water use

Fresh water use is one of the nine planetary boundaries that must not be transgressed if the earth must continue to exist. Climate change has necessitated the need for conservation of natural resources, including fresh water. Infrastructure provision for recycling water is one thing: accepting to use the recycled water is another. This paper assessed residents perception on recycled water use. It adopted a qualitative research design. Findings reveal that residents are willing to use recycled water, however, motivations of residents to use recycled water is different from the motivations suggested by the scientific community which focuses on climate change issues such as drought and conservation. The study recommends that water authorities should possess the required competencies for treating recycled water so that health risks associated with the use of recycled water can be minimized.

Data survey on public-private professionals role in building control measures within the Nigerian construction industry

The data survey focused on building control measures which are critical in attaining sustainable built environment. The data examined the public and private professional׳s performance of building control measures and its barriers in Lagos. The targets consist of sixty (60) construction experts in public and private construction firms operating in Lagos. The sample size was generated from the pool of registered construction professional׳s from private and public construction organizations in Lagos using random sampling technique. Descriptive statistics and inferential tests which include Kruskal-Wallis and Mann-Whitney U tests were performed on the dataset generated. The data harvested will avail the construction expert׳s in public and private construction industry on the need for partnership in a bid to enhance building control measures performance in Lagos.

Data on the pozzolanic activity in coconut shell ash (CSA) for use in sustainable construction

The data presented herein are results of the research summary of the investigation for pozzolanic activity in coconut shell ash (CSA) towards a sustainable construction. The data article provides information on the properties of Coconut Shell Ash that are indicative of pozzolanic activity as stated in ASTM C618-15 (2015) [1], BS EN 197-1 (2011) [2] and Joshua et al. (2018) [3]. The data are the physical property of the sand used in determining the binder strengths and the chemical and physical properties (oxide composition and Strength Activity Indices respectively) of the pulverized, calcined and sieved Coconut Shell Ash.

Data of the properties of rebar steel brands in Lagos, Nigerian market used in reinforced concrete applications

The data presented herein are compilations of the research summary of “Assessment of the Quality of Steel Reinforcement Bars Available in Nigerian Market” (Joshua et al., 2013) [1]. This data article provides information on the properties and cost of steel rebars used in reinforced concrete in Lagos, Nigeria. The data is based on the properties of 12u202fmm rebar brands which are the most used steel diameter in construction and they include actual diameters, yield strengths, ultimate strengths, ultimate/yield strength ratio, ductility and the cost of each brand. This data also contains the limiting standard properties of the highlighted properties in this data.

Data on mixing and curing methods effects on the compressive strength of concrete

Curing, though important is sometimes underrated in concrete production. This dataset provided shows the effects of four (4) different methods of curing on two distinct mix ratios. The data provided in this article are for a study that was conducted on one hundred and sixty (160) cube samples of mix ratios 1:2:4 and 1:1.5:3 while employing four (4) different methods of curing. The data given in the article displays the finding of the study. The findings can aid in prediction and optimization of concrete behavior and compressive strength when any of the curing methods are utilized.

Assessment of the Linkages and Leakages in a Cloud-Based Computing Collaboration among Construction Stakeholders

The uniqueness of the construction industry can be understood in the large volumes of information in terms of paper works, processes, and communication disseminated ndaily. The voluminous information requires close coordination which cloud based systems offer. The aim of this research is to assess the linkages and leakages in a ncloud-based computing collaboration among construction stakeholders. A purposive sampling technique was used in selecting the participants of the study. A questionnaire based instrument was distributed to eighty (80) construction nstakeholder in Lagos State, Nigeria. The data collected was analyzed using SPSS v.21. Statistical tools such as frequencies, stacked bars, mean scores, factor analysis, nand analysis of variance (ANOVA) were used in the study. The result of the study revealed that construction stakeholders rarely utilize cloud-based technologies for their construction processes. Construction professionals that access cloud based technologies, do so with their smart mobile phones, laptops, and tablet. The study classified the leakages that exist in the use of cloud-based technologies as securitybased factors, cloud-based infrastructure factors, and cloud-based benefits deficiency based factors. In conclusion, the study revealed that the linkages in the use of cloudbased technologies include knowledge sharing, remote access of back-office activities and engendering collaboration among construction stakeholders. It was recommended that construction stakeholders should leverage on the benefits cloud-based technologies has to offer in today’s competitive economy. Construction stakeholdersshould be adequately informed on the available cloud-based computing technologies and the additions it can bring into the construction process. Cloud computing technology vendors should improve on the security and privacy features of the platform for adequate protection of building data.

Development of a Web-Based Human Resource Sourcing System for Labour Only Contracts

Nowadays in some areas of Nigeria, it has been noticed that the search for a satisfactory team of labourers (skilled and unskilled) or even the right amount of people to undertake the job has become a laborious activity. Therefore, there is need to build a two-way partnership system linking construction firms with the required skilled labour and vice versa. The aim of this research is to develop a web-based nhuman resource sourcing system for labour only contracts. The study made use of a questionnaire instrument and developed a web-based interface for skilled labour nsourcing. The questionnaire was distributed to fifty (50) construction professionals who were selected through a convenience sampling technique. The data collected was nanalyzed using SPSS v.21. The design of the system was done using hypertext markup language (HTML) for authoring web pages. The study revealed that contractors’ sourcing techniques for skilled labour on construction projects were nmostly by referral from colleagues and workers from past projects. The study identified the major barriers in sourcing for skilled labour on construction projects as nthe unavailability of trained skilled labour. The study revealed that years of experience, wages charged and behavior of the worker were major criteria considered nwhile sourcing for skilled labour on construction projects. In conclusion, the study developed a web based human resource sourcing system for labour only contracts that nincorporated the needs of the skilled labour and requirement of construction firms. It was recommended that construction professionals and contractors need to harness the nbenefits of web-based technologies. In addition, there is need to increase the information and communication technology (ICT) trainings of workers in the construction industry so has to have a successful integration of ICT and the construction industry.

Development of a web-based building profession career portal as a guidance information system for secondary school students

Career selection is one of many difficult task students are faced with when leaving secondary schools. The lack of information about certain courses make students to shy away from taking up such profession which has adversely affected such professions. One of such profession is the Building profession. The aim of the study was to develop a web-based building profession career portal as a guidance information system for secondary school students with an aim to bring more awareness to the profession of building/building technology. The study utilized the use of a questionnaire and the system design of a web-based career portal. The latter was presented using a block diagram and screen shots of the portal. The web-based career portal was designed using CSS and HTML. The sample size for the study was selected through a convenience sampling technique. A total of 120 secondary school students and 30 of their teachers participated in the study. The data obtained was analyzed using SPSS v.21. Statistical tools of charts and mean scores were used. The study revealed that secondary school students obtain information about their prospective careers mainly through their parents. The study revealed that the significant factors that can affect the career decision of secondary school students in choosing a profession are mainly JAMB scores/WAEC result of the students, Environment & society and Self-interest. The study revealed that secondary school students perceived the Building profession as people that ensure that people are safe while constructing buildings while their teachers perceived the Building profession as people that can detect the possibility of erecting a building. In conclusion, a web-based building profession career portal as a guidance information system for secondary school students was developed. The study recommended that less subscribed professions should find ways to educate secondary school students, teachers and parents. This can be actualized through the use of career web-based portals that have detailed information about the course.

GENDER-BASED COMPETITIVE PERFORMANCE IN BUILT ENVIRONMENT TECHNICAL RELATED COURSES IN A TERTIARY INSTITUTION: COVENANT UNIVERSITY CASE STUDY

Technical Education in recent times has witnessed high patronage in term of subscription from male nand female candidates; this is against the school of thought that believes that technical-based ndisciplines are cut out for men. However in recent times, female candidates seem to be outperforming ntheir male counterpart breaking the norms which tends to have defied reasonable logic. It is against nthis background that this study carried out comparative analysis of academic performances of male nand female students studying technical-based disciplines in selected tertiary institution. Covenant nUniversity in Nigeria was chosen as a location of the study. Random sampling method was used in nthe study, with a sample of 80 students. A structured questionnaire in Likert scale was administered non student of technical based discipline, Eighty (80) questionnaires was administered on the students nto harvest their perspective. The responses were further collated, analyzed with SPSS software, nprocessed with Mean Item Score method and presented in tables and charts. nSome factors were identified as being responsible for the trend, which includes: Age diference, nemotional maturity, intelligence quotient, educational background, external interference, famiy nproblem, teachers challenge, complex curriculum, psychological problem, family problem, mode of nsubject delivery, attention to detail among others. Model was presented of an ideal metrics that ninfluences higher performance of female students over their counterpart and what could be done to nimprove performance of all gender components.