ABSTRACT Access to groundwater, a major source of direct drinking water in many developing countries, should not be assumed as access to safe drinking water. There is a need to prevent or minimize the contamination of groundwater, especially arising from solid waste disposal. This research work investigated the suitability of using clay and bentonite modified with sawdust as landfill liner materials for minimizing the migration of Pb2+, Cd2+ and Ni2+ in order to protect the environment and p...
ABSTRACT The performance of a pavement depends on the quality of its base, sub-base layers and sub grade. As the foundation for the pavement's upper layers, the subgrade layer plays a key role in mitigating the detrimental effects of static and dynamic stresses generated by traffic. Therefore, building a stable base course is vital for constructing an effective and long lasting pavement system. This study proceeds from the basis that, construction of foundations of most engineering structure...
Abstract The conventional method of design of reinforced concrete structures commonly used in Nigeria is the BS 8110 method. This project shO\S a comparative stud~ of BS 8110 and Eurocode 2 for the design or reinforced concrete elements of a building Vith the aim of determining "hich of the two codes provides the most economic design is carried out using manual calculations. A library complex of three storey building was selected and designed taking into account dead and live loads and assumi...
ABSTRACT The performance of a pavement depends on the quality of its sub-base and subgrade layers. As the foundation for the pavement's upper layers, the subgrade layer plays a key role in mitigating the detrimental effects of static and dynamic stresses generated by traffic. Therefore, building a stable subgrade is vital for constructing an effective and long lasting pavement system. This project work, review the investigation carried out on the strength characteristic of laterite in its na...
Abstract The primary objective of this study was to investigate the rank importance or most significant motivating factors on construction employees in South-South Nigeria. The research method for the study included a literature review and field survey. A sample population was selected from the target location. The findings indicated that the construction workers’ top five (5) motivation factors were: leadership, supervisor’s loyalty to employees, good salary, goalsetting, and good worki...
ABSTRACT The assumed deflection shapes used in the approximate methods such asin the Rayleigh–Ritz method were normally formulated by inspection andsometimes by trial and error, until recently, when a systematic method ofconstructing such a function in the form of characteristic orthogonal polynomials(COPs) was developed in 1985. However, vibrational analyses of plates with all edges free or clamped are much more complicated. This project aims at establishing particular expressions for the...
ABSTRACT Analysis of plane truss structures based on the assumptions that (1) members are connected at joints by frictionless pins and (2) loads are applied at joints only have become a norm not minding the facts that our practical trusses are always constructed by connecting members to gusset plates by welds, rivets, or high-strength bolts and loads may not necessarily be applied only at the nodes, have made such assumptions not to yield quite precise results. By the nature of practica...
ABSTRACT The development and utilization of energy has led to environmental degradation with associated health hazard. Hence the trust of this project is to optimize energy mix in a reliable, affordable, available, safe, efficient, effective and sustainable way at control cost subject to environmental constraints. In other to achieve the desired goal, optimization model is derived with unit cost of each of the various energy sources as the objective function and environmental impact as const...
Abstract The Vierendeel girder definition is open-frame N-truss without diagonal members, with rigid joints between the top and bottom chords and the verticals are known also as open-frame girder, this research is conducted to study the structural performance of different Vierendeel frame. Three models of the Vierendeel (1, 2& 3) were studied for their structural performance using approximate method and structural analysis programs such as SAP2000 and ROBOT STRUCTURAL for different loadings ...
ABSTRACT The proposed methods to solve optimal control problems are classified as direct methods and indirect methods. This thesis is based on solving optimal control problems using direct methods in which an optimal control problem is converted into a mathematical programming problem. The direct methods can be employed by using the parameterization technique which can be applied in three different ways: control parameterization, control-state parameterization and state parameterization. Her...
ABSTRACT This study is concerned with the production of high strength concrete using recycled concrete aggregates as alternative to natural aggregates. The study includes also the determination of the proportions, characteristics and components of concrete mixes required for production and use in multiple applications at suitable prices. The basic materials used in this research (ordinary Portland cement, natural aggregates, recycled concrete aggregates, natural valley sand, local tap water ...
ABSTRACT The construction industry in developing countries is under tremendous pressure to improve its performance and the quality of its products and services. The small-scale construction firms dominate the construction industry and governments had globally recognized micro and small-scale enterprises as an instrument of economic growth and development. Past studies by various researchers have recommended a number of performance improvement strategies. However each country has peculiar prob...
Abstract This Study Examined The Effects Of Effluent Discharges From Various Point-Loads On A Purposively Selected Receiving River, The Self-Recovery Ability Of The River And The Treatability Of Both The Discharges And The Receiving Stream In A Heavily Industrialized Community. The Work Involved Field Survey Of Industries Producing And Discharging Effluents In The Study Area (Ado Odo/ Otta Industrial Zone Of Ogun State, Nigeria); Determination Of The Effluents‘ Physico – Chemical, Biolog...
ABSTRACT Refractory bricks (refractories) are used in the construction of furnaces and kiln internal linings that hold, melt and transfer raw materials being processed. Kenya imports refractories mainly for its cement, metal smelting and sugar processing industries. Kaolin, bauxite, salama, soapstone and ball clays exhibited Loss of Ignition of 7-15%, silica of 46-55% and alumina of 25-34%. Soapstone and salama clays exhibited high values of potassium (5.6%) and iron oxide (16%), while salam...
Abstract The aim of this research was to develop an understanding of and measure the potential for sustainability in a South African urban water context. This was achieved through the use of a systems approach to develop and evaluate a composite index – the Sustainability Index for Integrated Urban Water Management (SIUWM) – based on a vision of what sustainable urban water management means to decision makers at selected local authorities around the country. The vision was expanded into ...