Question: Concrete is the most widely used material in construction. While the main ingredients in concrete mix are cement, coarse coal, fine coal and water. (a)

Concrete is the most widely used material in construction. While the main ingredients in concrete mix are cement, coarse coal, fine coal and water.

(a) How does water content affect the wet and dry properties of concrete? (b) Why does concrete need to be preserved after the placement and compaction process? Explain TWO (2) methods of concreting concrete suitable for badminton hall floor construction.

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