Coarse aggregate is an essential constituent of concrete
constituting about 60% to 80% of concrete depending on the mix ratio. Granite
is reported to be the most widely distributed plutonic rock in the earth crust.
It is predominantly available in various parts of Ogun State of Nigeria. Its
different properties have been known to strongly influence the fresh and
hardened state properties of concrete. In this study, samples of four different
sizes of granites (9.5 mm, 12.5 mm, 19 mm and 25 mm) were obtained from four
different quarry sites across the state. Sieve analysis was carried out on
samples from all the locations while the physical properties such as specific
gravity, moisture content and water absorption and the Mechanical properties
such as aggregate impact value and aggregate crushing value of the samples were
evaluated. The result of the sieve analysis reveals that there are variations
in the gradations of samples from the various locations. The results of the
specific gravity, moisture content and water absorption vary from 2.61 to 2.86,
0.69 to 1.22%, 0.16 to 2.13% respectively. While the aggregate impact value and
aggregate crushing value vary from 18.30 to 28.12% and 6.21 to 9.45%
respectively. It was therefore concluded that there are variations in the
physical and mechanical properties of granites produced in Ogun State of
Nigeria. The observed variations occur in relation to the various sizes and for
the different quarry sites.
Author(s) Details.
S. S. Omopariola
Department of Civil Engineering, The Federal Polytechnic
Ilaro, Ilaro, Ogun State, Nigeria.
A. A. Jimoh
Department of Civil Engineering, University of Ilorin,
Ilorin, Kwara State, Nigeria.
Please see the book here :- https://doi.org/10.9734/bpi/etert/v5
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