Recommended Compressive Strength Of Concrete For Residential Basement Floor Slab

After just 14 days of curing uhpc has a compressive strength of 20 000 psi.

Recommended compressive strength of concrete for residential basement floor slab.

Compressive strength must be at least 3500 psi. Compressive strength mpa air content r 1 footings for walls columns fireplaces and chimneys 0 70 15 3 6 r 2 foundation walls grade beams piers etc. This concrete is generally more affordable than higher strength concrete. Good slabs on ground are made from a mix in which the water cement ratio is kept low and they contain as much coarse aggregate as possible at the surface.

Water reducing admixtures lower the amount of water needed for workability and improve compressive strength at all ages. While traditional concrete normally has a compressive strength ranging anywhere from 2 500 to 5 000 psi uhpc can have a compressive strength of up to 10 times that of traditional concrete. One of the most important factors before ordering ready mix concrete is knowing the required compressive strength. A strength of 4 000 psi pounds per square inch after a one month cure is the industry minimum for concrete driveways slabs and sidewalks.

Four months after the floor was placed 10 cores were drilled measured and tested in compression. The actual average cylinder strength for the floor concrete was 3630 psi. Psi is a measure of compressive strength or the ability of the material to carry loads and handle compression. The specification for the floor of a maintenance building called for a 6 inch slab thickness and concrete with a design compressive strength of 3000 psi.

Need help with a concrete project. However 4 500 psi as the ideal. 0 70 15 4 7 r 3 interior slabs on ground not exposed to freeze thaw 0 65 20 c 2 garage floors and all concrete exposed to freeze thaw and deicing salts such as walkways driveways patios steps 0 45 32 5 8. This number increases to 30 000 psi when fully cured for 28 days.

1 2500 3000 psi most concrete has a psi rating of 2500 to 3000. Between 3 500 to 5 000 psi on suspended slabs beams and girders. Typically reinforced concrete ranging between 3 500 to 4 000 psi is used on footing and slabs on grade.