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About #57 Gravel Stone (P2). #57 Stone is an aggregate that is processed from natural durable materials. The size of #57 Stone spands from very small to 1 inch. #57 Stone is commonly used in mix concrete, mix asphalt and as bases for retaining walls and driveways.#57 Stone can also be applied in irrigation and on gravel roads.57 Stone is an aggregate that is processed from natural durable materials. The size of #57 Stone spands from very small to 1 inch. #57 Stone is commonly used in mix concrete, mix asphalt and as bases for retaining walls and driveways.
Lets say you are going to place it at a 4 inch depth. The standard weight that contractors use for crushed limestone is 2700 lbs per cubic yard. 2700 is the commonly used figure because the actual weight of dry stone is less but some moisture is always involved.So one cubic yard at a 4 inch depth would cover 9 square yards of your driveway..Now lets do the math.ets say you are going to place it at a 4 inch depth. The standard weight that contractors use for crushed limestone is 2700 lbs per cubic yard. 2700 is the commonly used figure because the actual weight of dry stone is less but some moisture is always involved.