what is the weight of a cubic foot of concrete?

Answer 1

That depends greatly upon the mix design (what the concrete is made out of). Mix designs can put concrete anywhere from 50 lbs/CF (using very light weight rocks and other items), to over 200 lbs per CF.

Generally, most of your everyday concrete (3000 psi, Type II cement, run of the mill stuff) is about 150 lbs/CF, give or take a couple of pounds.

Answer 2

140-150 lbs