Concrete | Normal Class
20 MPa and 25 MPa Commonly used for house slabs, driveways, footings and footpaths.
Residential slabs and footings
A default slump of 100mm has been adopted by the pre mix concrete industry to reduce the uncontrolled addition of water on site and make placing and compacting of concrete easier for concreters.
32 MPa, 40 MPa, 50 MPa Higher strength is commonly used for concrete that will experience greater loads and traffic. This may be specified by engineers or builders to suit the load requirements which the concrete must support during its life.