Reginald P. Smithers III wrote:


Show me that concrete mix design that has 2500# of Portland cement in
it, and weighs better than two tons, and we'll go from there.

ps When I said Portland Cement weighed approx. 2500 lbs, I was referring
to Portland Cement, I never said or hinted that one would put 2500 lbs
of Portland Cement into a yard of concrete mix.

Have you looked over your concrete mixes to see that it is very common
for a yard of concrete to weigh approx. 4000 lbs?

One would not expect a PE to make sure a mistake.