Usually specified at design stage, this form of ready mix concrete is designed to comply with a compressive strength denoted by the class of mix. Mixes are measured in grades, with strengths ranging from 10 Newtons through to high strength concrete mixes available online at 45 Newtons. 

A C10 to C25 mix has a low cement content, meaning that the strength of the mix is the lowest of the design concrete mixes that we offer. This would be used when strength is not the main factor of your concrete application.  

A C30 and C35 mix has a medium cement content inclusion, meaning that the strength of the mix is in the middle class of the design concrete products that we offer. This would be used when strength is not the main factor of your concrete application. 

A C40 mix has a high cement content inclusion, meaning that the strength of the mix is in the high class of the design concrete products that we offer. This would be used when strength is the main factor of your concrete application. 

A C45 mix has a very high cement content inclusion, meaning that the strength of the mix is the highest class of the design concrete products that we offer. This would be used when strength is the main factor of your concrete application.