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The coarse aggregates act like bone in concrete. If we use low quality aggregate in concrete mix, the strength of concrete will be low. The amount of aggregate greatly affects the properties of hardened concrete. Increasing the amount of aggregate at a constant cement content reduce the concrete strength. Strength of concrete can also be affected by the type of aggregate. Such as, angular and rough surface concrete increase the concrete strength.
The basic properties of aggregates, such as water absorption and specific gravity, mechanical properties, such as abrasionresistance, effect, and crushing values were considered. Workability of fresh concrete and strength parameters of hardened concrete, suchas compressive strength and tensile strength, were studied. The preceding properties were tested for three different periods of curing of 7, 14,and 28 days.