What is C20 concrete grade?
Often more affordable than higher strength concrete, 2,500 PSI can be useful for driveways and walkways. However, some may choose a stronger concrete, like 3,000 PSI, to avoid excessive cracking. A good use for this concrete is a walkway on the side of a home that doesn’t receive excessive traffic.
Rounded off it’s basically a 1 : 3 : 3 mix ratio A sack or “bag” of cement weighs 94 pounds so this tells us a 3000 psi concrete mix is also equal to a 5.5 sack mix of concrete.
Concrete grade/strength class C20/25 with a minimum cylinder strength of 20MPa and a minimum cube strength 25MPa is the minimum concrete grade/strength class recommended for the construction of the reinforced load-bearing building structural members such as columns, beams and slabs in mild exposure condition [16].
What is the PSI for Class C concrete?
C20 Concrete Grade C20 or Gen 3 is rated at 20 Newton/28 day strength. This mixture can be used to form lightweight foundations and applications in residential projects. Typical uses for this grade of concrete are in the formation of internal floor slabs, driveways, garages, and sheds.
