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.
For example, ordinary construction grade concrete often achieves a compressive strength of 4000 psi in 28 days. Itâs not unusual for a mix design for concrete countertops to reach that strength in only 2 days. With some advanced mixes, this can be achieved in a matter of hours.