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ENGINEERING PROPERTIES OF CONCRETE MADE FROM GRAVELS OBTAINED IN SOUTH-WESTERN NIGERIA

Sulymon, Nurain and Ofuyatan, Olatokunbo M. and Olowofoyeku, O. A. and Olawale, Simon and Busari, A. A. and Bamigboye, Gideon and Jolayemi, Joshua (2017) ENGINEERING PROPERTIES OF CONCRETE MADE FROM GRAVELS OBTAINED IN SOUTH-WESTERN NIGERIA. Cogent Engineering.

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Abstract

This study investigates the engineering properties of concrete produced from gravels and also verify the suitability of local gravel aggregates obtained from South-western Nigeria in place of crushed granite. Preliminary investigations were carried out in five selected states (Ogun, Oyo, Osun, Ondo and Ekiti) in southwestern Nigeria to determine the registered gravel mining pits. Fifteen gravel mining pits based on age and scale of mining operations were selected for this study. Appropriate gravel constituents in concrete mix were determined using Gs factor. Concrete cubes 150 mm, 150 × 300 mm cylinder modes and 150 x 150 x 750 mm beams were cast with collected gravel. 1:2:4 mix ratio was employed. Sieves analysis, density, water absorption were carried out on aggregates, while compressive, flexural and split-tensile strengths of the concrete were determined for 28 days using ASTM and BS methods. High concrete strengths resulted from high FM, low AAV and average Gs of gravels. Gravel location with highest compressive, flexural and split-tensile strengths of concretes had 24.8N/mm2, 3.5N/mm2 and 2.8N/mm2 satisfying the minimum requirement of BS 811: 1997 while that with lowest strengths had 9.6N/mm2, 2.2N/mm2 and 1.7N/mm2 respectively. Sources of gravel highly influence compressive, flexural and split-tensile strengths of the cubes and beams

Item Type: Article
Uncontrolled Keywords: Coarse aggregates, Gravel aggregate, Concrete, aggregates properties.
Subjects: T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering, Science and Mathematics > School of Civil Engineering and the Environment
Depositing User: Mrs Hannah Akinwumi
Date Deposited: 28 Aug 2017 11:59
Last Modified: 28 Aug 2017 11:59
URI: http://eprints.covenantuniversity.edu.ng/id/eprint/8931

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