- Properties of Concrete Produced with Waste Bottle Caps (WBC) as a Partial
Replacement of Coarse Aggregate and Orange Leaves Powder as Plasticizer
Authors: A. Ishaya, I. M. Oyemogum, A. Arinze, J. C. Abah
Abstract: Green building is an increasingly important global concern and a critical way to conserve natural resources and reduce the amount of materials going to our landfills. Large quantities of metal waste are generated from empty metal cans and bottle caps of juices and soft drinks. This is an environmental issue as metal waste is difficult to biodegrade and involves processes either to recycle or reuse. Today the construction industry is in need of finding effective materials for increasing the strength of concrete structures with low cost, and with less environmental damage. This research is aimed at addressing such issues by investigating the possibility of using waste bottle caps (WBC) to partially substitute for coarse aggregate and using orange leaves powder as plasticizer in concrete production. The slump, demoulded density, split tensile strength, compressive strength, flexural strength properties at different percentages replacement of coarse aggregate with waste bottle caps were investigated in the laboratory. The work shows that compressive strengths of 83.88%, 76.25% and 63.17% of the control (0%) can be achieved at the 28-day by replacing coarse aggregate with 5%, 10% and 15% of the waste bottle caps respectively. The research also indicates that optimum result in terms of compressive strength is between 5% and 15% of gravel replacement given a value of 35.85N/mm2 and 27N/mm2 respectively. Keywords: Landfills, Green building, Compressive strength, Flexural strength, Waste Bottle Caps, Construction industry and Biodegrade
Issue No: Vol. 8
- Noise Pollution and Its Impact on Human Health and Social Behavior using
Systems Approach-A Case Study in Kurnool City
Authors: P. Amrutha Preethi M. Sravani
Abstract: The main objective of this paper is to evaluate the noise pollution problem in the Kurnool city of Andhra Pradesh, India and its effect on the public. Transportation and horn used in vehicle are the major source of noise pollution. Noise is one of the environmental problems that make daily life uncomfortable. It is an unidentified pollution that causes adverse effects on human life. Noise interferes in complex task performance, modifies social behavior and causes annoyance. Six different locations are chosen for study. Noise levels are monitored at different times in the day and night. Bronfenbrenner’s systems approach is used to illustrate the socio behavioral changes in human life due to noise. Keywords: Traffic noise – severe health issues - effect on social behavior - systems approach.
Issue No: Vol. 8
- Aeroelastic Investigation of Long Span Suspension Bridge Decks by
Numerical CFD and FSI Analyses
Authors: Walid A. Latif Attia, Ahmed A. Aziz Ahmed
Abstract: CFD (Computational Fluid Dynamics) simulations appear to be strong competitor of the wind tunnel test which required scaled model and it is really expensive and time consuming tool in designing bridges therefore there is a strong claim to replace them with CFD. Analyses carried out for different deck cross sections by secondary development of commercial computational fluid dynamics software ANSYS FLUENT, establishing two dimensional bending and torsional fluid-structure interaction (FSI) numerical model to calculate flutter critical wind speed. The flutter motion belongs to a sharp growth of amplitude (heave or rotation) as a function of the wind speed can be detected by performing the FSI at different wind speeds set in FLUENT model as a velocity inlet. By using the two neighboring wind speeds the critical wind speed can be obtained once a decay motion oscillation observed. Steady and unsteady simulations have been computed in order to judge the feasibility of CFD simulations in the early design stage of long span bridges. Additionally realizable (κ-ε) model with enhanced wall treatment and (κ-ω SST) turbulence models have been considered to verify their performance in bridge aerodynamics problems. It has been found that static aerodynamic coefficients have been correctly modeled using a steady simulation, while flutter critical wind speed is judged from time histories of unsteady simulations for stationary deck sections. The validity of the simulation method was verified by comparison of simulation results with the work done by other researchers. Keywords: CFD, critical flutter wind speed, bridge aeroelasticity, suspension bridges.
Issue No: Vol. 8
- Effects of Reward Systems on Performance of Construction Workers in Ghana
Authors: Nani; G., Apraku, K.
Abstract: One major problem facing organizational managers all over the world and in all sectors of every economy, be they private or public, is how to obtain optimum performance from employees. This is possible when an employee on individual and/or group level is highly recognized and rewarded for performance. It is therefore relevant to explore the effects of reward systems on the performance of construction workers in Ghana. This is what has been done and reported in this paper. Contractors with D1K1 classification, working or undertaking projects in the Northern part of Ghana and had elaborate and distinct system of rewarding employees were involved in the survey. A combination of interview and questionnaire administration was used to gather data. Respondents were chosen, based on their level of exposure to site administration of construction projects, and involvement] of the construction project. Through hypothesis testing, the Pearson chi-square results indicate a significant positive association between reward systems and performance with asymptotic significance level of less than 0.05. The findings indicate non-financial rewards were as important as financial rewards to improve the performance of employees. This paper recommends a multiple function and integration of framework which seeks to attract, retain and motivate employees to induce higher performance. Keywords: financial rewards, non-financial rewards, performance, construction industry.
Issue No: Vol. 8
- Analysis of Tenement Rating Administration in Awka South Local Government
Area of Anambra State
Authors: Okafor; B. N.
Abstract: This research dealt with the analysis of tenement rating particularly, it dealt with the problems encountered in the administration of tenement rating in Awka South Local Government Area of Anambra State. The following are involved: tenement assessment, publication of valuation list, issuing of demand notice, levying of tax, billing and collection for an effective administration of tenement rating; these activities must be carried out adequately, but the reverse has been the case. In the course of this project, relevant literature were reviewed. Data were collected through the use of interview questionnaires and the result was subjected to different statistical techniques and presented in tables, bars and percentages. The findings of this study are that inadequate training is given to the staffs in the valuation unit of the government secretariat which makes them unqualified and incompetent to carry out tenement rating. Rate collection drive requires good transportation facilities for mobility but it is hampered due to inadequate provision of transportation facilities. As a result, some suggestions were made that tenement rating administration requires qualified and competent management as such the staff should be properly trained on rating valuation principles. Estate surveyors and valuers as professionals and experts should be left to handle tenement rating since they are the only one that can handle it properly. In conclusion, it abounds in tenement rating administration. However, if adequate caution is made, it would be properly arranged.
Issue No: Vol. 8
- Analyses of Land and Housing Price Inflation in Nigeria, A Study of
Federal Capital Territory Abuja from 1999 to 2009
Authors: OKAFOR; B. N., ONUOHA, D. C.
Abstract: The aim of this study is to critically considered inflation in the prices of land and housing in the Abuja property market from 1999 to 2009, and it is limited to residential property in the phase one of the Abuja property market. This research work was carried out to determine if actually there has been a persistence increase in the prices of residential accommodation in the study area, and also to determine the factors responsible for such increase. Data for the study were collected through observations, personal interviews, and library studies. The data so collected were analyzed using measures of central tendency, graphs and simple percentage table. The result of the study shows that there is inflation in the Abuja property market within the period under investigation. It also shows that the prices of land and housing are increasing at an average inflation rate of 50.1% for lease property and 39.3% for sale property. The work thus recommended the following: that the Government should provide mortgage insurance to first time home buyers who do not have credit history and to low-to middle income families in order to achieve our aim of providing affordable housing; the Federal government should de-centralize government offices from the city centre to other parts of the state to help reduce the demand of land and housing in the study area, in effect reducing the continuous-increase in the prices of land and housing, as people will have to shift to take abode in residential properties close to their offices; the government should go into mass housing development and also corporate with private developers in a bid to make different types of residential housing units available, thereby increasing the supply of the housing unit to meet demand for them. This will help reduce the continuous increase in the housing prices. Keywords: Land, Housing and Price Inflation.
Issue No: Vol. 8
- Urban Landfill Investigation for Managing Negative Impact on Geo Spatial
Environment in the Context of Ethiopian GTP 2 Goal of Sustainable
Environmental Management A Case of Woliyta Soddo town
Authors: Bereket Geberselassie Assa
Abstract: As many scholars showed that the intervention of humans on the natural environment inﬂuences the nature of ecosystem processes by the rate at which they operate on environment . In addition to poor urban planning and management has always negative impact on environment, economy, ecology and heath problem in community . Therefore, landfill has to be selected carefully by considering both land use regulations and constraint in regarding to landfill site selection analysis in case of Wolayta Soddo town has been selected as case study. due to poor waste disposal and management system in the study area often end up in drains, causing blockages that result in flooding, unsanitary conditions and cause very effective vectors (flies) to spread disease like malaria, including acute water diarrhea and typhoid fever, which are current existing problems in Wolayta Soddo town due to inappropriate waste disposal site. and based on problem existence of Soddo town solid waste disposal system, the object was developed to conduct suitable solid waste disposal site and least cost path using Geographic Information System (GIS) and Multi Criteria evaluation (MCE). In addition, In order to active the objective of this research, eight very important factors have been used such are: land use, soil, ground water, drainage, road, slope, Aspect and population using the method of weighted overlay technique for all selected factors in Arc GIS 9.3 and IDRISI 32 software to generated Analytic Hierarchical Process (AHP) Eigen vector matrix value. In addition, as the finding of this thesis, it has been showed; a 6ha of land of the study area was selected among the 32.49 ha of very high suitable site Keywords: Analytic Hierarchical Process (AHP), Geographic Information System (GIS)
Issue No: Vol. 8
- The Architectural Plausibility of an Urban Parking Facility Project: A Jos
City Centre Scenario
Authors: Arc Oko; Joseph Oko
Abstract: This paper is aimed at addressing the car park shortage problem of the Central Business District, CBD, of Jos, the Plateau State capital, Nigeria, West Africa. The car park dilemma has become a blot in the landscape in the city centre as a result of its gross inadequacy. A study of the city centre’s car park problem revealed a continuing, incremental trend whose magnitude cannot be easily quantified. The purpose of this paper is to put forward a plausible, sustainable solution which would address the parking problem such that it is contained as the need arises irrespective of the developmental stride of the city centre. This was achieved by undertaking a field investigation and an Outline Architectural Design of a prototype car park facility in the form of add – on – module to address the exigencies of sustainability and adaptability to address the unpredictable but surely increasing future car park needs. Through this means emerges a blueprint for means of addressing the present car park problems and also the future requirements within the framework of socio - economic, environmental and sustainability angles. Keywords: Architectural Design, Car Park, Central Business District (CBD), Planning, Sustainability
Issue No: Vol. 8
- Operational Performance Evaluation of Post Office – Teaching Hospital
Road, Ile – Ife, Nigeria
Authors: Ajibade; M. K, Mohammed, H
Abstract: Traffic demand is significantly on the increase in our urban centres without a commensurate increase in the rate of road infrastructure development, resulting in traffic congestion. The need to periodically evaluate the operational performance of these roads with a view to addressing this problem becomes imperative, hence this study. Speed and traffic flow data were collected for morning and evening peaks for seven days for two segments of the selected urban road in Ile-Ife, using normal procedure. Traffic flow parameters, such as, travel speed, traffic volume and capacity were computed and operational performance evaluation determined. The study showed that, motorcycles were the predominant means of transport (50 %), and followed by buses (25 %), cars (23 %) and trucks (2 %), while the average travel speed was 41 km / h. The average traffic capacity of 1306 pc/hr/ln was also obtained. The results revealed that the operating speed and capacity of the road were short of the required values of 1500 pc/hr/ln and 50 – 60 km / h, respectively, for an urban two-way two-lane highway. The road is therefore prone to congestion. Keywords: key words, Traffic Demand, Road Infrastructure, Operational performance
Issue No: Vol. 8
- Journal Cover Page
Authors: Journal Editor
Abstract: Journal Cover Page
Issue No: Vol. 8
- The Use of Mobile Construction Applications in the Ghanaian Construction
Authors: Adjei; Kofi Owusu, Eyiah-Botwe, Emmanuel
Abstract: There exist several construction applications (Apps) used on mobile phones or tablets within the construction industry, yet there is a gap between technology design and technology use in the Ghanaian construction industry. The aim of this study is to find out the use of construction apps in the Ghanaian construction industry. The objectives were to find out the awareness of the use of construction apps and to evaluate the construction apps used in the Ghanaian construction industry. An extensive literature review was conducted to identify the construction applications available in the construction industry and were group under 5 main headings; namely, estimation, calculators, CAD, construction site and project management Apps. Field survey of Sixty-Two registered building and civil contractors in Ashanti Region was conducted. Questionnaires were distributed to top management team of the firms with a response rate of 89%. Data obtained were analysed with descriptive statistics techniques. The results show that majority were not aware of the use of construction apps by 58% of the respondents yet most use android phones or tablets that support Apps. However, the topmost applications normally used were site photos, microsoft, spirit level, material estimator calculator, AutoCAD WS, Construction Master Pro, Universal Estimator, AndCAD, Carpenter’s Calculator, and painting estimator. It is however important that tertiary educational institutions pursuing construction related programmes should from time to time educate the young construction engineers about the modern and importance of the usage of these construction apps to enhance efficiency in their operations. Keywords: construction Apps, contractors, construction industry, mobile phones, Ghana.
Issue No: Vol. 8