Strength assessment of concrete made from coastal plain sands: a case study of
part of southwestern Nigeria
Osadebe*, C.C., Sulymon, N.A. and
Omoniyi, S.S.
Nigerian Building and Road Research Institute,
P.M.B 1055, Ota, Ogun State, Nigeria
Abstract
The
compressive strength properties of concrete with varying proportions of Coastal
Plain Sands (locally referred as ‘Yoyo’ sand) as substitute in fine aggregate as
well as different mix proportions were studied. Three mixes (batching by weight)
of 2:3:6; 1:2:4 and 1:3:6 were used with water/cement ratio of 0.55, 0.65 and
0.75 respectively. Test results showed that the fine aggregate is generally of
high quality in terms of compressive strength and bulk density and it also
produced concrete of relatively high compressive strength especially with mix
2:3:6 and 1:2:4 which have compressive strength varying from 16.6 N/mm2
to 29.1 N/mm2 and 12.9 to 23.2 N/mm2 respectively and
slump values ranging from 5mm to 97mm. This is an indication that Coastal Plain
Sands are suitable for the production of concrete, either wholly or by partial
substitution with conventional river sands. Concretes produced from mix 1:3:6
exhibited relatively lower compressive strength due to low quantity of cement
mix and water/cement ratio of 0.75.
Key words: Coastal
Plain Sands, concrete, compressive strength, water/cement ratio
