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ABSTRACT
This study carried out an investigation on 3 cement brands of grade 42.5N and using a concrete mix, they were designed for the grade 40, grade 30, grade 20, respectively. The test was carried out to know the discrepancies that would occur knowing very well that most cement brands don’t actually meet the required compressive strength that is being said to have by the manufacturer. The 3 cement brands are Dangote, BUA and Elephant cement of which a mix design ratio of 1:1.75:3.55 with a w/c ratio of 0.45 used for grade 40, 1:1.51:4 with a w/c ratio of was used for grade 30 and 1:1.58:4.26 with a w/c ratio of 0.56 was used for grade 20. A total of 81 cubes was casted and left to cure for 28 days in water. The average compression strength of the concrete for grade 40 elephant for 7 days, 14 days, 28 days was 28.992 N/mm2 , 34.472 N/mm2 and 37.833 N/mm2 , grade 40 for dangote for the same days respectively was 27.780 N/mm2 , 34.866 N/mm2 and 36.590 N/mm2 and grade 40 for BUA is 26.611 N/mm2 , 34.66 N/mm2 and 36.87 N/mm2 . it was observed that Elephant cement attained the highest strength, so therefore, showing that the Elephant cement is the strongest amongst the 3 different cement brands.
