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ABSTRACT
In this paper, the evaluation of the effects of different contaminated water on the compressive strength of concrete was investigated. It analyzed the effects of impurities such as salt and detergent in water on the compressive strength of concrete. The samples of contaminated water from three different sources (Tap water, salty water and detergent water) were collected and used as mixing water to form concrete paste. 150 x 150 x 150mm cube specimens were cast, 6-each for salt water, detergent water and potable water with water-cement ratio of 0.45 and mix proportioning of 1:2:5. The compressive strength test was carried out on the cubes and the results revealed that the applied crushing load (KN) of each of the three specimens differs at 28 days significantly. The average compressive strength of portable water cubes was 16.70N/mm2, salty cubes was 13.60N/mm2 while that of detergent cubes was 15.60N/mm2. It is concluded that salt and detergent in mixing water have significant effects on the compressive strength of concrete and detergent water have better performance compare to saline. Only in the absence of tap water, contaminated water can be used as mixing water. It is then recommended that further research on the strength properties of concrete should be consider on the uses of the contaminated water.
Keywords: Concrete, Cement, Aggregate, Compressive Strength, Impurities and Mixing Water.
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