How to mix 4500 psi cement?
3000 psi concrete weighs Approx 3900 Lb/yd3
3000 psi 3500?
If is standard concrete it is usually 3000 psi mix
no
Aprox. 485 lbs. per Cubic Yard
Concrete is ordered in terms of what strength it will be when it is dried a cured. For instance a typical mixture for an engineered foundation would be 3000 psi. Most driveways are 2500 psi. Check your local codes. Some county's require 3000 psi for the approach and any sidewalk which adjoins their street.
3000 psi. with 3/4 rock should do it . but you could go higher psi which would be over kill.
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.
500psi
206.8 bar in 3,000 psi
You can't convert a RATIO (which is a pure number) to a MEASUREMENT such as psi. You get such a ratio by dividing two different pressures, for example.