Civil & Environmental Engineering- Conference Papers

Permanent URI for this collection

https://ir.unilag.edu.ng/handle/123456789/3685

Browse

Browsing Civil & Environmental Engineering- Conference Papers by Title

Now showing 1 - 20 of 33
  • Item
    Open Access
    Bond Strength Of Reinforced Laterized Concrete Beams.
    (Premier Conference, 2006-08-17) Falade, F.; Oyekan, G.L.
    This paper presents the results of an investigation into the effects of reinforcement diameter and embedment depth on the bond strength of reinforced laterized concrete beams. Four different bar diameters (12mm, 16mm, 20mm and 25mm) were considered. Three embedment depths were used; namely, 3d, 4d and 5d (d = bar diameter). The specimens were tested at curing ages of 7, 14, 21 and 28 days. The results show that (i) for a given depth, bond strength decreased with increase in reinforcement diameter (ii) the higher the depth, the higher the value of bond strength and (iii) generally there was increase in bond strength with age.
  • Item
    Open Access
    Challenges In Engineering Education In Africa
    (2008-02-25) Falade, F.
    Engineering education deals with the training of engineers for the purposes of initiating, facilitating and implementing the technological development of a nation. In Africa, the training of engineers has witnessed formidable challenges ranging from poor funding to inadequate facilities both quantitatively and qualitatively, non-availability of adequate human capacity, brain drain and poor staff training and retention profiles. Others include weak university/industry partnership, defective curricula, traditional approach to teaching, poorly equipped laboratories, non-availability of local codes and monitoring standards for the training of prospective engineers and an inadequate lCT environment.
  • Item
    Open Access
    Concrete Deterioration, Diagnosis, Maintenance And Maintenance Reliability In Buildings In Hot Climates.
    (2001-09-13) Falade, F.
    This paper identifies types of deterioration in concrete structures and analyses their causes, examines methods of repair and maintenance and assesses the effectiveness of the maintenance with age. The findings in this study have showed that maintenance reliability depends on (a) quality of materials (b) the proffered technical solution (c) supervision (d) regularity of inspection and (e) management procedure.
  • Item
    Open Access
    Contract Law and Management of Engineering Projects
    (Nigerian Society of Engineers, Lagos Branch, 2013-10) Afolabi, O.
    Full texts attached
  • Item
    Open Access
    Design, Development And Assessment Of Maintenance System For Building Industry In Developing Countries
    (2001-09-06) Falade, F.
    This paper examines the problems of maintenance in developing countries. It acknowledges poor maintenance culture as a worldwide problem but notes that the situation is at an alarming rate in the developing countries. Usually building projects are packaged without provision for the future maintenance of the buildings during their service periods. Therefore, when the facilities are being used and deterioration sets in, it takes sometime to put an arrangement in place to correct the defect(s). Most maintenance operations fail qualitatively and quantitatively due to improper design, inappropriate maintenance approach, inadequate planning and inappropriate maintenance method and a times lack of maintenance policies. The author indicates that the use of labour-based method for maintenance operations in building industry would be more appropriate in developing countries as opposed to equipment-based or labour intensive approach. Labour-based method is considered to be more economical than either equipment based or labour intensive method. An operational concept for effective design and management of maintenance work is presented. The concept provides procedures for carrying out maintenance works, evaluating resources for maintenance operations and assessing the performance of maintenance works. The performance is assessed by cost control (cost indexes and performance checks through the use of man-hours per unit of work done. Good management in maintenance work would furnish such indexes as are necessary to permit evaluation of the performance of the organisation internally and provide top management with information they need to assess the performance of the maintenance.
  • Item
    Open Access
    ECONOMIC APPRAISAL AND CONTRACT MANAGEMENT PROCESS: ENGINEERING PROCUREMENT AUDITS
    (Nigerian Institute of Appraisers and Cost Engineers, 2017-07-04) AFOLABI, Olusegun
  • Item
    Open Access
    Effective University/Industry Partnership:A Tool for Sustainable Development.
    (2005-11-17) Falade, F.; Ibidapo-Obe, O.
    This paper examines the relationship between the Universities, Industry and Government as stakeholders is development processes and proposes a strategy for a more efficient synergy. The performance of each sector in highlighted. The paper notes the need for university (the trainer of the manpower for technological advancement) and industry (user of the manpower) to form a strong partnership so as to persuade the Government provide the requisite enabling environment. Such close interaction will provide growth technological advancement and therefore economic development. The use of Information and Communication Technologies (ICT)for appropriate networking between the university and the industry should enhance efficient transfer of new technologies from university the industry. The establishment of university/industry and government roundtable considered an effective method for the promotion of technological development. Such relationship will facilitate the training of the engineer-entrepreneur who will be capable integrating engineering skills and technical competence with sound knowledge management and entrepreneurship in nurturing endogenous technologies into small and medium-scale industries.
  • Item
    Open Access
    Effects of Pulverized Beans Husk (PBH) on the Engineering Properties of Lateritic Soil
    (African Transportation Professional Networking Group, 2016) Adeboje, A.; Ogundalu, A.; Adeagbo, A.
    This study examines the potential of stabilizing lateritic soil with Pulverized Beans Husks (PBH) for road pavement construction. The effects of adding 0 – 12.50 % PBH on the engineering properties of lateritic soil were investigated. Chemical composition, index and strength tests were conducted to evaluate the effect of PBH on the lateritic soil. Silicon Oxide and Calcium Oxide were the predominant oxides in both the lateritic soil and PBH. Liquid limit (LL) and plastic limit (PL) of the lateritic soil increased with increase in PBH while the plasticity index (PI) decreased. Maximum dry density (MDD) decreased with increase in PBH while the optimum moisture content (OMC) increased. California bearing ratio (CBR) and unconfined compressive strength (UCS) decreased with increase in PBH. The results indicated that PBH alone cannot be used to improve the strength properties of lateritic soil for road pavement construction.
  • Item
    Open Access
  • Item
    Open Access
    Engineering Education for Employment in a Globalized and Competitive Economy
    (African Regional Conference on Engineering Education, ARCEE 2004, 2004-09) AFOLABI, Olusegun A
  • Item
    Open Access
    Engineering infrastructures development and the local content value
    (The Nigerian Society of Engineers, 2015-11) Afolabi, O.
    Infrastructure’s development must allow for adequate service and functional period because of the high financial commitments required, hence it should be a sustainable enterprise. Infrastructures are fundamental facilities and systems serving a country, city, or area,including the services and facilities necessary for its economy to function.It typically characterizes technical structures such as roads, bridges, tunnels, water supply, sewers, electrical grids, telecommunications, etc, and can also be defined as "the physical components of interrelated systems providing commodities and services essential to enable, sustain, or enhance societal living conditions.Sustainable development is an action plan, for achieving sustainability in any activity that uses resources and where immediate and inter-generational replication is demanded. Therefore, sustainable development is the organizing principle for sustaining finite resources necessary to provide for the needs of a communal society, It is a process that envisions a desirable future state for human societies in which living conditions and resource-use continue to meet human needs without undermining the integrity, stability and aesthetic of the natural systems. Local Content is a global science which involves the commitment of specialized engineering industry to build-on the capacity and capability of indigenous country (in-country) people and businesses in order to support a long term development of the emerging sector. This will creates positive social and economic impact and enhances good business environment for citizens, eg, by involving local companies in sub-contracting may reduce project completion time and allow for a viable and economical costs. Since, the choice of participations in engineering activities is an input dependency for a quality product, these makes it necessary for the enforcement of in-country participation, especially on the aspect of developing human capacity which can only be determined at the specific industry. Human capacity building is an essential aspect of an engineering process. Engineering trainings are classified as, crafting, technical, technologies, and engineers, each of these segments and individuals are engaged in one aspect or the other of the production process, and the learning process and exposure is continuous until perfection and expertise depending on the available opportunities within the industry. The element of local content when subjected to the law, makes it a requirement and this will allow indigenous person the opportunity to learn and acquired engineering skills through the process of employment and also, will enhance the active and adequateparticipation in sub-contracting work within a project.
  • Item
    Open Access
    Engineering properties of concrete with sand partially substituted with crumb rubber
    (Wessex Institute of Technology Press, 2018) Adeboje, A.O.; Kupolati, W.K.; Sadiku, E.R.; Ndambuki, J.M.
    The study was carried out to evaluate the influence of substituting sand content in concrete mixes with small proportions of crumb rubber on the mechanical and microstructural properties of concrete. The influence of crumb rubber on the mechanical properties of the concrete mixes was evaluated at early and prolonged ages, in addition to the conventional standard age. The microstructural property of the crumb rubber modified concrete samples was evaluated by testing and characterizing concrete samples obtained from the central part of the concrete cubes which were cured for 28 days. The properties of concrete samples were obtained from slump, bulk density, compressive strength, split tensile strength, scanning electron microscopy and energy dispersive spectroscopy tests. The results showed improvement in the mechanical properties of the concrete samples with increase in the age of curing in water. It further revealed that substitution of certain proportion of sand with crumb rubber could result in concrete with slightly improved mechanical properties of the crumb rubber modified concrete whereas substitution of greater quantities of sand with crumb rubber can lead to reduction in the strength parameters of the concrete samples. The microstructural characteristics of the concrete specimens substantiated the trend in the mechanical properties of the concrete samples
  • Item
    Open Access
    Engineering Properties of used and unused soil in a developing country
    (University of Ilorin, 2012-07) Adeboje, A.O.; Olaniyan, O.S.; Oladeji, O.S.; Osuolale, O.M.
    It is difficult to assess the strength parameters of lateritic soils from existing literature due to variability in test methods, degree of compaction and soil characteristics. This paper describes some significant engineering properties of both used and unused laterite soils, and also examines the reusability of laterite soil in construction of local houses. Disturbed samples of both used and unused laterite soils were investigated. The tests carried out are sieve analysis, atterberg limits, specific gravity, british standard compaction, air-dry moisture content, triaxial compression and compressive strength. The results from the study revealed that the geotechnical properties of the unused laterite soil samples are better than that of the used laterite soil samples. The compressive strength of unused laterite soil is greater than that of used laterite soil hence they are more suitable, preferable and safer to be used for construction of local houses than the used laterite soil. The used laterite soil can however be re-used or reutilized to build local houses by addition of 0.5% portland cement. Futhermore, addition of 0.75% portland cement to the used laterite soil makes it stronger and more suitable for construction than the unused laterite soil.
  • Item
    Open Access
    Engineering Research:A tool for development of manufacturing industry in developing countries: Nigeria - A case study
    (2015-03-05) Falade, F.
    This paper presents the importance of engineering research to the advancement of manufacturing industry. It identifies the problems in the research institutions and industrial sector. It notes that both sectors suffer from human and non-human challenges that militate against their service delivery and contributions to national development. Strategies for technological and industrial development are highlighted. Such strategies are expected to result in the development of endogenous technology that makes the best use of the local resources of a country. Technological collaborations between industries within a country on the one hand and overseas industries, on the other hand should provide good synergy that could hasten industrial development. The paper concludes that research-driven industries exhibit high efficiency, low consumption of resources, contribute to improved standard of living of the citizenry and overall growth in national economy
  • Item
    Open Access
    Focal Point in Engineering Education:Research, Development and Transfer of Information- The Nigerian Experience.
    (2004-09-22) Falade, F.
    The principal reason for the existence of university is the acquisition and subsequent utilization of new information (research) and its dissemination to the end-users (education). Research is the bedrock of the university, its other responsibilities; teaching and service are made more meaningful and effective if backed up by serious minded research. Research in engineering education should provide answer to the new challenges in the industrial sector and assist in proper development of manpower needs for the technological growth of a nation. Collaboration between partners from industry and research institutions to work together on programs in key scientific areas assists the development of new products and services. This paper notes that there are some factors that militate against effective research in engineering, development of manpower and proper dissemination of available research findings to the end-users. Suggestions are made on ways of improving the current situation in order to make progress.
  • Item
    Open Access
    Funding Of Engineering And Technology Education In Nigeria.
    (2004-09-22) Ikponmwosa, E.; Falade, F.
    In Nigeria, funding mechanisms for Engineering and Technology Education in tertiary institutions have witnessed serious decline in the last two decades. In 1979, the Government introduced its policy of free education at all levels, which presupposed that it would adequately fund education. But rather than adequate funding, there has been a gradual reduction in government financial allocation to the sector in successive annual budgets. The consequence of this is the restlessness and greater clamour in the institutions on either fee based qualitative education or on establishment of privately sponsored dedicated engineering/technical colleges and universities. This paper compares the level of, and trends in funding of education in selected countries (including Nigeria) around the world. The study shows that in Nigeria, the level of funding per student had been on the decline from $4,753.00 in 1985 to $500.00 in 2001. The paper highlights the effect of poor funding on Engineering Education in the country and suggests some measures to improve the funding of Higher Education.
  • Item
    Open Access
    IMPACT OF PROCUREMENT PROCESS ON ENGINEERING INFRASTRUCTURE AND ECONOMIC DEVELOPMENT – ENGINEERING ECONOMY PERSPECTIVES
    (Nigerian Institute of Appraisers and Cost Engineers, 2019-09-10) AFOLABI, Olusegun A
  • Item
    Open Access
    MENTORING: IMBIBING THE SPIRIT OF SELF-REALIZATION AND TECHNICALITY INTO THE POTENTIAL CIVIL ENGINEER
    (NIGERIAN INSTITUTION OF CIVIL ENGINEERS, YOUNG ENGINEERS FORUM, 2014-10-31) AFOLABI, Olusegun A
  • Item
    Open Access
    MONITORING AND PROJECT EVALUATION AS QUALITY CONTROL PROCESS FOR SUSTAINABLE INFRASTRUCTURE DEVELOPMENT IN NIGERIA
    (The Nigerian Society of Engineers, 2017-11) AFOLABI, Olusegun A
    Infrastructures are structures, systems, and facilities serving a country, city or area, and it includes the services and facilities necessary for the economy to function adequately, alsothe comprehension of infrastructure spans not only on the public works facilities, but it also includes the operating procedures, management practices and development policies that interact together with societal demand and the physical world to facilitate those essential services.Investment in infrastructures, such as transportation, structures (bridges, buildings etc.), energy, information and technology etc., are crucial to achieving sustainable development and empowering communities in many developing nations, including Nigeria. The basic aim of sustainable infrastructure is quality in terms of functionality, which positively is related to the achievement of social, economic, and political goals, and also, Resiliency as a design objective for buildings and infrastructures, “is the ability to absorb or avoid damage without suffering complete failure”, and which also, involves economic and environmental sustainability of the projects. Economic sustainability is the ability of an economy to support a definite level of economic production infinitely, and Economic development has traditionally required a growth in the gross domestic product, which is a monetary measure of the market value of all final goods and services produced within a period of investment (eg, quarterly, yearly, etc).Therefore adequate management of available resources is a necessary attribute and essential to sustainable development. Resource management in project infrastructure development can be achieved through the process of adequate monitoring and project evaluation as indicated in this study.Evaluations appraises, data and information that inform strategic decisions, for an improved project or programs in the future. Evaluations help to draw conclusions about five main aspects of an intervention, Relevance ( ie, needs of the project), effectiveness (the developmental improvement factors), efficiency (social and engineering), impact, and expected benefits, sustainability.
  • Item
    Open Access
    Nigerian Housing Scenario:Research into Local Building Materials
    (2000-10-06) Falade, F.
    This paper examines the involvement of Government in housing delivery in Nigeria. It noted that the participation of Government has not been too successful. The low-cost housing programmes have been eluding the target groups because of high unit costs, which make the housing units unaffordable to the intended beneficiaries. Some research findings on local materials that are suitable for low-cost housing schemes are presented. It is recommended that the use of conventional materials and inappropriate construction technologies be discontinued while Government, its agencies and parastatals are enjoined to use appropriate local materials for their projects. Funding of prototypes as a way of ascertaining the real life behaviour of some materials is necessary, and therefore Government and Industrialists should endeavour to contribute towards realization of success of such results.