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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.
#2's are primarily a 1/2 by 1 sized coarse aggregate with a top size of 1-1/2. They make a good base under concrete slabs or for areas where drainage is desirable. #2/s also provide the larger aggregate in hot mix asphalt and ready mix concrete.1's are our most popular coarse aggregate, primarily 1/2 by 1/4 in size with a top size of 1. Mainly used in ready mix concrete and hot mix asphalt, it also has some uses for the homeowner. It can be used in walkways and driveways, or for drainage stone.