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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.
1. Calculate your need for gravel and crushed stone. The first step to installing your new gravel driveway is to determine how much stone material youâll actually require. In addition to the gravel, youâll need a base layer of crushed stone in order to add support and promote healthy drainage. For a rectangular driveway, youâll need to multiply the length x the width x the depth of the project area to learn how many cubic yards of crushed stone and gravel youâll require.