Faculty of Environmental Sciences
Permanent URI for this communityhttps://irepos.unijos.edu.ng/handle/123456789/11166
Browse
18 results
Search Results
Item Strength Development Ratio Of Untreated And Heat Treated Sisal Fibre Reinforced Medium Strength Ternary Concrete(Journal of Multidisciplinary Engineering Science and Technology (JMEST), 2015-11-01) Patrick Oguguo Nwankwo; Danjuma Joseph GohThe strength development ratio (𝐅𝐜) of plain concrete and ternary concrete containing three blends of fly ash (FA) and calcined waste crushed clay bricks (CWCCB) as pozzolanas and incorporating 3% volume fraction (𝐕𝐟) of 40mm average length of untreated and heat treated sisal fibre have been investigated. In this investigation, nine variations of concrete and ternary concrete samples were prepared and cast in 150mmx150mmx150mm mould comprising: (1) Plain concrete of 1:2:4 mix ratio, as control specimens (i.e. one part of ordinary Portland cement (OPC) as binder, two parts of river sand as fine aggregate, and four parts of 19mm crushed granite as coarse aggregate), designated as (4C). (2) Concrete specimens of 1:2:4 mix ratio, reinforced with 3% 𝐕𝐟 of untreated sisal fibre (4F). (3) Concrete specimens of 1:2:4 mix ratio, reinforced with 3% 𝐕𝐟 of heat treated sisal fibre (4FH). (4) Ternary concrete specimens of 1:2:4 mix ratio, with binder ratio consisting of 50% OPC + 20% FA + 30% CWCCB and reinforced with 3% 𝐕𝐟 of untreated sisal fibre (4F20/30). (5) Ternary concrete specimens of 1:2:4 mix ratio, with binder ratio as in (4) and reinforced with 3% 𝐕𝐟 of heat treated sisal fibre (4FH20/30). (6) Ternary concrete specimens of 1:2:4 mix ratio, with binder ratio of 50% OPC + 25% FA + 25% CWCCB and reinforced with 3% 𝐕𝐟 of untreated sisal fibre (4F25/25). (7) Ternary concrete specimens of 1:2:4 mix ratio, with binder ratio as in (6) and reinforced with 3% 𝐕𝐟 of heat treated sisal fibre (4FH25/25). (8) Ternary concrete specimens of 1:2:4 mix ratio, with binder ratio of 50% OPC + 30% FA + 20% CWCCB and reinforced with 3% 𝐕𝐟 of untreated sisal fibre (4F30/20). (9) Ternary concrete specimens of 1:2:4 mix ratio, with binder ratio as in (8) and reinforced with 3% 𝐕𝐟 of heat treated sisal fibre (4FH30/20). Water/binder ratio was kept constant at 0.6 for all specimens. The cube specimens were cured by immersion in clean water and tested at 7, 28 and 90 days curing ages. Plain concrete specimens incorporating 3% 𝐕𝐟 of untreated sisal fibre enhanced the strength development ratio by 65%. Heat treatment of sisal fibre caused an overall reduction of the strength development ratio.Item Knowledge, Attitudes/Beliefs and Practices in Medical Waste Management - An Appraisal of Jos North LGA, Plateau State, Nigeria(International Journal of Research in Humanities and Social Studies, 2015-12) Erekpitan O. Ola-Adisa1, Y. P. Elijah Mangden2, Yohanna C. Sati3, James O. Adisa4Bio-medical waste is defined as wastes that is generated during the diagnosis, treatment or immunization of human beings that are contaminated with patients' body fluids, syringes, needles, ampoules, organs and body parts, placenta, dressings, disposables plastics and microbiological wastes. Medical wastes poses a significant impact on health and environment. Proper waste management strategies ensure health and environmental safety. This study aims is an appraisal of waste management practices in Jos North LGA of Plateau State from a longitudinal study of 70 medical establishments in the LGA. The study reveals a waste-collection system that is sound in principle but with deficiencies because of the declining quality of the waste managers’ service delivery, examining belief systems of stakeholders to determine the effect these have on actual implementation of waste management strategies in Jos North. Questionnaire administration to service providers and other relevant stakeholders and the subsequent analysis as a research instrument revealed knowledge gaps in the user base. The results showed that 50% of the general waste produce is non-infectious, majority of the waste is not segregated. The study also shows that most of the sampled facilities do not segregate their waste, nor use protective clothing such as gloves during waste handling. The study also shows majority of the medical facilities dispose of their waste on daily basis and have monthly and yearly record of their financial lending on waste management ranging from N20, 000, 00 to N100, 000, 00. Appropriate suggestions are made in order to curtail the risks of infection as result of improper disposal of medical waste in all medical establishments in Nigeria.Item AN ANALYSIS OF MAINTENANCE FUNDING IN NIGERIAN FEDERAL UNIVERSITIES(ATBU JOURNAL OF ENVIRONMENTAL TECHNOLOGY, 2005-06) 1 Kunya,S.U.and 2 Achuenu,E.The research examined and appraised the allocations relating to maintenance management of buildings in Nigerian Universities. It was aimed at generating and collecting data relating to maintenance needs, and funds available for the maintenance of Universities in Nigeria, thereby determining the appropriateness of the funding arrangement. The. data used for the research work were collected from the Federal Universities in the six geopolitical zones in Nigeria. These data were collected by the use of 240 well structured questionnaires to university senior and experienced maintenance officers in the physical planning unit, in addition to critical examination of relevant documents from the maintenance department of the National Universities Commission, (NUC). Paired t-test, simple regression and multiple regression analyses were carried out using Microsoft excel and Minitab software packages. From the results it was found that inadequate funds relating to maintenance needs are drastically affecting the system of maintenance. It is recommended that allocations and appropriate utilization of maintenance funds to the Universities should be aggressively reviewed.Item Adopting Stabilized Earth Construction to Address Urban Low-cost Housing Crisis in Jos, Nigeria(Journal of Ergonomics Studies and Research, 2018) Daniel A. A.; Benjamin G. K.; Tali J. O.Shelter is one of the basic needs of mankind, while housing is a form of shelter which has profound impact on health, welfare and productivity of individuals. In developing nations (such as Nigeria), this basic necessity of life (housing) has been kept far from the reach of the low-income earner. In this strive for shelter; stabilized earth is an alternative building material which is comparatively cheaper than conventional building materials used in the construction of houses in urban centers. Due to modernization, earth is now associated to villagers or only used in the construction of historical buildings. It is no doubt that we can use our abundant resources to bridge the housing gap between the high income and the low income earner and give not only shelter but with comfort and providing shelter at an affordable rate to the low income earner. Three case studies were used for the purpose of this research. The findings of the study revealed a 30% reduction in cost of constructing a building with adobe bricks over sandcrete hollow blocks. The research identified and highlighted the cost effectiveness, thermal insulation and the durability of clay (earth). The study concluded that the use of earth should be employed by professionals in the construction industry to increase its acceptability by the public.Item Subsidising the Cost of Land for Low Income Housing: Some Evidence from Jos, Nigeria(Journal of Surveying, Construction and Property (JSCP), 2017) Maren Mallo Daniel; Sanda Nehemiah Yakubu; Celina Onugba Omogor; Adesina AkandeThis study aims to examine the variables that influence the application of land and infrastructure subsidy for low-income housing provision in the city of Jos, Nigeria. Data was collected by conducting interviews with the representatives of the relevant government agencies and those of the house building companies. This was transcribed and examined alongside documentary evidences. The analysis was conducted in line with the study’s objectives: The first was to examine how the policy for subsidising the cost of land applies in the local context in Jos. The data examined in connection to this objective suggest that there is an absence of a uniform approach to the application of the subsidy policy by the three tiers—federal, state and local—of government. The approaches adopted by the federal and state government agencies were seen not to be effective in supplying the subsidies needed by private developers. The second objective was interested in scrutinising the variables influencing the arrangement for subsidising the cost of land in Jos. The data analysed confirms that the lack of proper understanding of land subsidy policy among government officials, the absence of political will on the part of State and Federal government agencies, the absence of transparency and accountability on the part of government officials, the absence of legislation in support of the subsidy policy, and bureaucratic constraints were the key variables influencing the subsidy arrangement in Jos. These findings were examined and some recommendations were proffered.Item A markov chain model for wet and dry spell probabilities at Yola, Adamawa State.(Nigerian joarnal of pure and applied sciences, 2011) Oduwole, H.K., Binbol, N.L., and Shawul, H.M.The theoretical probabilities of wet and dry spells were derived from Markov Chain Model using the threshold level of 0.25mm per day for a period of 20 years to predict the length of dry spell and wet spell during the rainy season (April to Sepember) at Gyawana meteorological station on Yola, North Eastern Nigeria. The equilibrum probabilities for the station over 20-year period are pie=(0.76,0.24). This implies that the probability of dry day occurence regardless of the weather conditions of the previous days is 0.76. Th mean weather cycle was 7.44. This information can be used to select the best planting date by avoiding the period of high risk of long dry period near the beginning of the rainy season always experienced in northen Nigeria.Item ACHIEVEMENT MOTIVATION, CAREER ASPIRATION AND ACADEMIC ACHIEVEMENT FOR EFFECTIVE INCLUSION AMONGST UNDERGRADUATE TEACHER TRAINEEES IN PLATEAU STATE POLYTECHNIC BARKIN LADI(National Journal of Inclusive Education, 2014-07) Anakwe A. I; Suleiman Dikkos; Momoh S. OThe achievement motivation to the hundred was measured using the Mady's need for achievement scales. Furthermore, the relationship between, students' N'ach, students career aspiration in three fields of education (school, ministry, and university) at ages 29, 30 and 90 years and students' academic achievement (CGPA) were investigated. The results showed that the students that constituted the sample had fairly high need for achievement. There were no significant sex differences in students N'ach. The results further showed that N'ach preferring university teaching career. There was no relationship between career aspirations at years. The results also showed that N'ach was positively related to academic achievement. The findings of the results were discussed in relation to previous findings elsewhere and their implication mentioned.Item Effective Facilities Management Through Management Information System: A Case Study Of Industrial Training Fund (ITF) Building Abuja(Researchjournali Exclusive Journal Publishing House, 2015-02) Achoru Afam MikeFacilities management is concerned with the process by which organizations ensure that their buildings, systems and services support core operations while contributing to the achievement of their strategic objectives under stable business conditions. It focuses on matching limited resources to user needs with a view of securing higher quality, lower risks and value for money. Specifically, it deals with space design, construction, allocation, strategy, property asset management, maintenance and post occupancy evaluation of premises, inventory management, value management and life cycle costing, computerization and office automation, management of support services. As facility managers, the principle objective is to manage the existing facilities effectively in a cost effective manner and also ensure smooth running of business. It has been established that effective maintenance management requires adequate planning, foresight, monitoring and budgeting. The application of information technology in facilities management has been identified as essential for the success of facility management task. Facility managers can no longer keep the track of work order manually, the use of spreadsheet to carry out routine and preventive maintenance tasks is a less effective option to the use of computerized maintenance management systems being deployed recently by forward looking facility managers.Item An Appraisal Of The Relationship Between Consumerism And Housing Delivery In Jos Metropolis(Exclusive Journal Publishing House, 2015-03) Achoru Afam MikeConsumerism is defined as a program to promote consumer interest as it relates to continuous consumption of goods. This research work aimed at appraising the relationship between consumerism and housing delivery in Jos metropolis by looking at the consumption rate of houses by capable consumers and the extent to which the construction industry responds to this demand by supplying houses. A purposive sampling method was used to select the class of construction firms and Estate management firms for the questionnaires administration. All firms were located within Jos metropolis and had wide practical experience/knowledge. The data analysis tools used for analysis includes the Chi-Square method of analysis, percentage score method of analysis, correlation analysis and hypothetical framework. The study indicated that Consumerism is advantageous to the construction industry depending on quite a lot of factors which includes; personal interest of a consumer, location of house, infrastructural amenities within, quality of house/service, available funds, class/style of houses and available security. High income earners consume houses the most at a rate of 64.7%. This research also indicated that the house type consumed through sale the most are residential houses due to the nature of Jos metropolis at a frequency rate of 64.7%.Item Flexural Strength Characteristics of Fly Ash Blended OPC Reinforced Sorrel Fibre Concrete(2016) Goh Danjuma Joseph; Williams Frank Ndanus; John James Anumah; Kingsley Onyeka AugustineThis research work studied the flexural strength characteristics of Fly Ash blended ordinary Portland cement (OPC) concrete reinforced sorrel fibre. This study considered three mix ratios of concrete specimens and were prepared and cast into 100mm × 100mm × 500mm mould of: (1)1:2:4 mix ratio of plain concrete as control sample (2) concrete sample of 1:2:4 mix ratio, reinforced with 1.5% volume fraction of 50mm average length of sorrel fibre (3) Concrete specimens of 1:2:4 mix ratio with binders containing 90% (OPC) + 10% (FA); 80% (OPC) + 20% (FA) and 70% (OPC) + 30% (FA). The water binder ratio was kept constant at 0.6. All the blended samples were reinforced with 1.5% by volume fraction of heat treated sorrel fibre of 50mm average length. The beams specimens were cast for flexural strength tests. The concrete samples were tested in flexure at 7, 28 and 90 days. With the addition of heat treated sorrel fibre, flexural strength increased from 5.0N/mm2, 6.0 N/mm2 and 7.5N/mm2 for optimum blend at 7, 28 and 90days respectively. For the blend containing 10% (FA) + 1.5% volume average length of heat treated sorrel fibre recorded the highest flexural strength mentioned above. The properties of sorrel fibre reinforced concrete was improved with the optimum blend of Fly Ash (FA) and Heat Treated Sorrel Fibre (HSF).