Recycled Aggregates - Portland Cement Association
Concrete is a building material, and if used for its originally intended purpose, it is not a waste material at all. Since it is not a waste first and foremost, it cannot be a hazardous waste by definition. So the question of is concrete hazardous waste is clearly no. However, can concrete .If you see crushed stone, crusher stone, crushed bluestone, clean stone or NJ DOT #57 stone, just know that it's the same thing. Regardless of what it's called, though, 3/4″ crushed stone is simply a stone aggregate that has been crushed down to size and screened to ensure that no larger stones are present.