Start with 2000 of P then add 1000 of S an at the end add 1000 of I mix it very good .After about 45 days you will have 4000 p,s and I which stand for 4000 PSI
500psi
fy= 4000 to 4500 psi
If is standard concrete it is usually 3000 psi mix
3965 lbs/cy
4500
Aprox. 485 lbs. per Cubic Yard
there is no such thing. psi is how much oxygen is in a certain amount of space (mostly used for deep divers
How to mix 4500 psi cement?
Generally speaking, concrete is rated anywhere from 2000 psi to 10,000 psi. Of course if you do NOT use the proper ratio of aggregate (usually sand) to cement and water you can make concrete that is even weaker. When concrete is ordered from a delivery company, you specify the strength of he mix or pour that you want.
Cement : Sand : Gravel 1 : 3 : 6
FOR WINTER MIX CONCRETE IN THE NYC AREA AS OF FEBRUARY 2012 THE COST FOR 3200 psi CONCRETE IS $114 PER CUBIC YARD
$93.50 for a yard of fiber reinforced 2500 psi concrete in the Newnan, Ga area. As of 01/01/08