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A comparative study of concrete properties using coconut shell and palm kernel shell as coarse aggregates

Olanipekun, E. A and Olusola, K. O and Ata, O. (2005) A comparative study of concrete properties using coconut shell and palm kernel shell as coarse aggregates. Building and Environment. pp. 297-301.

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The high cost of conventional building materials is a major factor affecting housing delivery in Nigeria. This has necessitated research into alternative materials of construction. This paper presents the results of an investigation carried out on the comparative cost analysis and strength characteristics of concrete produced using crushed, granular coconut and palm kernel shells as substitutes for conventional coarse aggregate in gradation of 0%, 25%, 50%, 75% and 100%. Two mix ratios (1:1:2 and 1:2:4) were used. A total of320 cubes ofsize 100�100�100mm were cast, tested and their physical and mechanical properties determined. The results ofthe tests showed that the compressive strength ofthe concrete decreased as the percentage of the shells increased in the two mix ratios. However, concrete obtained from coconut shells exhibited a higher compressive strength than palm kernel shell concrete in the two mix proportions. The results also indicated cost reduction of 30% and 42% for concrete produced from coconut shells and palm kernel shells, respectively. Considering the strength/economy ratio, it was concluded that coconut shells were more suitable than palm kernel shells when used as substitute for conventional aggregates in concrete production. r 2005 Elsevier Ltd. All rights reserved.

Item Type: Article
Subjects: T Technology > TH Building construction
Divisions: Faculty of Engineering, Science and Mathematics > School of Civil Engineering and the Environment
Depositing User: Mrs Patricia Nwokealisi
Date Deposited: 10 Oct 2013 06:47
Last Modified: 10 Oct 2013 06:47

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