The mining industry spans the globe, as do alumni of the University of Arizona mining and geological engineering program. Many got their feet wet working as interns for Arizona-based mining companies like Freeport-McMoRan.
Weight A 1 Â½ inch thick countertop made of standard concrete has an approximate weight of 18.75 pounds per square foot. (Granite is approximately 18 pounds per square foot.) Standard cabinetry will typically support this weight because itâs distributed over a large area.
Go from the 200 grit pad to the 400 grit pad, the surface should really start to feel smooth and hard now. After you're done with the 400 grit pad, clean the entire surface area with water. You should notice some pin holes in the surface of the concrete countertop.