DOI: 10.5176/2301-394X_ACE14.24
Authors: O.S, ABIOLA, W. K, KUPOLATI, J. O, AKINYELE & L. I, RAIMI.
Abstract:
Concrete has an excellent structural performance and durability, but usually affected by early deterioration when exposed to marine environment. The research investigated four basic scenarios of mixing and curing respectively: saline water/saline water (SS); saline water/freshwater (SF); freshwater/saline water (FS) and freshwater/freshwater (FF). Saline water was obtained from the Bar Beach in Lagos State, Nigeria. Cement mixed with saline water was examined for its consistency and the setting time. The mix ratio of 1: 2: 4 was used with water – cement ratio of 0.6 to determine the compressive strength of the concrete. Chemical analysis of the saline water was carried out before and after use. Temperature and pH of the saline water was monitored. Forty-Eight concrete cubes were cast of 150 x 150 x 150 mm size and tested for their compressive strength at 7, 14, 21 and 28 days. The setting time reduces with saline water. The concrete of FS, SF and SS at 28 days of curing showed an increase of 1.2{6e6090cdd558c53a8bc18225ef4499fead9160abd3419ad4f137e902b483c465}, 6.0{6e6090cdd558c53a8bc18225ef4499fead9160abd3419ad4f137e902b483c465} and 12.8 {6e6090cdd558c53a8bc18225ef4499fead9160abd3419ad4f137e902b483c465} respectively in strength over the control (FF). Saline water can be used for plain concrete and there is need for further research on the effect of saline water on fibre reinforced concrete)
Keywords: saline water; concrete; mixing; curing; compressive strength
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