Civil & Environmental Engineering- Conference Papers

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Browsing Civil & Environmental Engineering- Conference Papers by Subject "Concrete"

Now showing 1 - 3 of 3
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    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
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    Open Access
    An Overview of Foamed Aerated Concrete - A Building And Civil Engineering Construction Material
    (Duncan Science Company, 2008) Ikponmwosa, E; Falade, F
    Over the -past 20 years foamed aerated concrete has become accepted in many parts of the world as an important material for use in the construction industry. The amount of foamed concrete being used, the number of producers/manufacturers and variety of applications where it can be used have drastically increased. For many applications, foamed concrete can provide cost and performance benefits when compared with traditional building materials. This paper provides an overview of what foamed aerated concrete is and seeks to introduce the material to Nigerian construction industry and researchers through awareness creation. It also highlights the advantages and disadvantages as well as giving an overview of technical specification of the material. Applications for which foamed concrete can be used are discussed, including the use of foamed concrete in building. construction, roads, bridges, void filling, ground stabilization and land reclamation.
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    Open Access
    Quality Control And Maintenance Of Concrete In Buildings In Hot Climates.
    (2000-12-08) Falade, F.
    This paper examines the use of concrete as mass and/or reinforced concrete in buildings. It identifies defects associated with concrete as a result of poor quality control during its preparation. It shows that high level monitoring is necessary on construction sites in hot climates to determine the physical condition of the concrete constituents in order to ascertain the appropriate proportions for a mix to achieve the specified concrete strength for each project. The paper further noted that a close monitoring is required to determine the method of maintenance required to keep the concrete structure in a serviceable state during its service life It concludes that the use of good quality concrete reduces the necessity for monitoring and lowers maintenance costs while assuring high reliability of buildings.