Engineering

Research Papers/Topics in Engineering

Correlation and Regression as applied in Green Concrete Research

Correlation and regression were used as statistical tools to analyse the mechanical and durability properties of green concrete. The use of these analytical tools showed that the degree of relationship that exists between a green concrete property (for example compressive strength or water absorption or resistance to sulphate attack) and percentage replacement of cement with a civil engineering material can be established using correlation; the nature and extent of the relations...

Behaviour of Coconut Shell Aggregate (CSA) Concrete at Elevated Temperature

This paper attempts to study the mechanicalbehaviour of coconut shell aggregate (CSA) concretesubjected to elevated temperatures when coconut shell (CS)is used to replace coarse aggregate at 0, 10, 20 and 40% inconcrete. The coconut shell used was obtained by breakingthe shells into smaller sizes of less than 20mm after thefibres were removed. In order to produce control concretesamples with a minimum compressive strength of 15N/mm2at 28 days curing age, mix ratio of 1:2:4 and water-cementrat...

Mechanical Properties of Particleboard Made from Mahogany Leaves Using Gum Arabic as Binder

This paper presents the findings of an investigation into the use of mahogany leaves particles for the production of gumArabic bonded particleboards. Fresh mahogany leaves, air-dried to a target moisture content of 10% were crushed to anaverage particle size of 2mm. Mix ratios of 2:1, 2.5:1, 3:1, and 3.5:1 of gum Arabic to the crushed mahogany leaves byweight of the mahogany leaves were produced respectively. Twenty four (24) particleboards of sizes 200mm length,50mm width, and 6mm thick were...

Performance of Concrete Made with Coconut Shell Ash (CSA) as an Admixture in Acidic Environment

This paper presents the findings of an investigation on the use of coconut shell ash (CSA) as admixture in concrete and its effect on durability performance. The CSA used was obtained by controlled burning of coconut shell in an incinerator to a temperature of 600–650ºC for 3 hours, air cooled, sieved through 75μm sieve and characterized by using X-ray Fluorescence (XRF) analytical method. The compressive and splitting tensile strengths of concrete were investigated at varying CSA additio...

Effect of Coconut Shell Ash (CSA) as an Amixture on the Properties of Cement Paste and Concrete

This paper presents the findings of an investigation on coconut shell ash (CSA) as admixture in cement paste and concrete. The CSA used was obtained by controlled burning of coconut shell in an incinerator to a temperature of between 600–650ºC for 3 hours, air cooled, sieved through 75μm sieve and characterized based on its oxides composition determined using X-ray Fluorescence (XRF) analytical method. The effects of CSA on cement paste were investigated with addition of 0, 2, 4, 6, 8 and...

Use of Correlation and Regression Analyses as Statistical Tools in Green Concrete Research

Correlation and regression in this paper were employed as analytical tools to study the degree of relationship as well asthe nature and strength of the relationship between green concrete properties and percentage replacement of cementwith civil engineering materials. Pearson product-moment method and Spearman’s correlation coefficient wereextensively used to show how correlation analysis can be practically applied in green concrete research. Least squareregression line method for both line...

An Evaluation Of The Effects of Efficient Risk Management in the Downstream Oil and Gas Sector (A Case Study of Selected Filling Stations in Gusau Metropolis)

ABSTRACTThis study was carried out to investigate the effects of efficient risk management in the downstream oil and gas sectors. To achieve this objective, the researcher developed and administered a questionnaire on fifty five staffs of A.A. Rano Nigeria Limited and Total Nigeria Plc in Gusau. The likert scale statistical and graphical method was used in testing the null hypothesis. From the study, it was observed that these filing station have a technique for risk identification and evalua...

Perspective on The Role of Occupational Health and Safety Measures: Implication on Employee Performance and Organization Productivity in Selected Organizations in Gusau Metropolis

ABSTRACTThis study was carried out to investigate the perspective on the role of occupational health and safety measures: implication on employee performance and organization productivity in selected organizations in Gusau Metropolis. To achieve this objective, the researcher developed and administered a questionnaire on fifty five staffs of A.A. Rano Nigeria Limited and Total Nigeria Plc in Gusau. The likert scale statistical and graphical method was used in testing the null hypothesis. From...

INVESTIGATION OF SUITABLE TIME FOR THE PERFORMANCE MEASUREMENT AND EVALUATION OF MONO-CRYSTALLINE PHOTOVOLTAIC PANELS AT FEDERAL UNIVERSITY OF AGRICULTURE, ABEOKUTA (FUNAAB), ALABATA, OGUN ST

Abstract Human existence relies on solar energy either directly or indirectly and the world at large cannot continue to exist, remain or live without the solar energy. Solar power in Nigeria can serve as a source of sustainable energy if fully utilized due to abundant availability all year round energy and its regular appearance on daily basis in the sky under a friendly environment. The maximum output current and power of solar panel used in harvesting solar energy are obtained at solar...

Output Power and Voltage-Time Characteristics of Mono-Crystalline Photovoltaic Panel at Federal University of Agriculture, Abeokuta (FUNAAB), Alabata, Ogun State, Nigeria Under FUNAAB Weather

AbstractSolar energy is gaining more attention than ever before due to its potential ability to provide the world energy needed at a sufficient and reliable rate. Putting more focus on its optimum harvesting and utilization can eventually solve the problem of energy shortage by balancing up the energy demand of the nation. Adequate information on the output voltage of the solar panel to cope with the output current during the daytime is essential to be able to predict accurately the estim...

PERFORMANCE EVALUATION OF MONO-CRYSTALLINE PHOTOVOLTAIC PANELS IN FUNAAB, ALABATA, OGUN STATE, NIGERIA WEATHER CONDITION

AbstractThe current-voltage characteristic is the basic descriptor of photovoltaic device and is used to test the performance of PV panel. The manufacture specifications on solar panels are obtained under standard condition (solar irradiance of 1000 W/m2, AM 1.5 and operating temperature of 25oC) which is not the real operating condition the solar panels are exposed to on the installation site. With this, the information obtained from the manufacture specifications would not be sufficient ...

Development of a Solar Powered Poultry Egg Incubator for South West Nigeria

AbstractEgg incubators with regular, effective and efficient operation have the capacities of providing enough poultry birds which can serve every household in Nigeria with sufficient amount of protein on daily basis. Although many commercial incubators in Nigeria has folded up due to epileptic and erratic electricity supply which disrupts and impairs the operation of the incubators and reduce their level of performance resulting into low production and high cost of poultry birds. In order to...

Design of Distillation Column

Azeotropic distillation of ethanol-water mixture is accomplished by adding a volatile thirdcomponent to the liquid which changes the volatility of one of the two components more than theother so the components are separated by distillation. The two components to be separated oftenhave similar boiling point components which do or do not azeotrope in the binary mixture, butsometimes there are components which do azeotrope despite having vastly different boiling points.It is likely that in some ...

VAPOR–LIQUID EQUILIBRIA OF MIXTURES CONTAINING n-DECANE, CARBON DIOXIDE AND ARGON USING MOLECULAR SIMULATION TECHNIQUES (GIBBS ENSEMBLE MONTE CARLO SIMULATION)

 Abstract The CO2–hydrocarbons systems is common in oil and gas industry as a geological fluid. CO2 plays a vital role in biological processes namely photosynthesis, respiration, and actively participates in the carbon cycle. However, the time gradient of carbon dioxide concentration in the atmosphere has become a major global concern. The environmental challenges associated with the control and management of anthropogenic emissions of greenhouse gases have been the focal po...

Design, Fabrication, and Performance Evaluation of a Double Effect Evaporator

This project study was aimed at designing, fabricating, and evaluating the performance of a double effect evaporator, which was used to evaporate sugar syrup to be used for students’ demonstration. During the course of the study, the methods that were used comprised of the material balances, energy balances, and determination of the component parts of the evaporator. The results from the study included the overall material in the evaporator’s system, the material balance for each effect, ...


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