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.
The key to a great countertop is a well-built mold to pour the concrete into. Start with a 4' x 6' piece of 1 thick melamine particleboard. Set firmly on a pair of sawhorses. Measure and mark the exact dimensions on the mold base, then cut using a circular saw (image 2). Cut the sides of the mold.