C10 concrete, or Gen 1 concrete is an extremely versatile mix used throughout the construction industry for general and housing applications. This includes un-reinforced strip, trench fill and and agricultural applications.

It can also be used for drainage works and blinding house floors, as well as pad foundations and non-structural mass concrete in non-aggressive ground conditions.

Ideal for: Foundations for steps, trench fill, floor blinding & drainage works.

C20 concrete mix and Gen 3 concrete
 Used for lightweight domestic applications and foundations, such as shed & workshop bases It can also be used to construct internal floor slabs

Ideal for: Foundations for large walls, garages, houses & extensions. Paving for patios. Reinforced bases & oversites for conservatories, garages, sheds, greenhouses.

C30 concrete, PAV1 concrete and ST 3 concrete are the most common types of concrete used for pavement construction.
 

It is also ideal for lighter use external applications, such as slabbing, as well as outdoor paved areas such as stables, driveways, walkways, patios and garages.

PAV 1 mixes have an air entrainment additive to create standard sized air bubbles in the concrete. This helps to protect the surface from freeze-thaw cycles, making it especially useful for outdoor paving.

C35 concrete is a heavy-duty use concrete. It offers high quality  but is much more substantial making it suitable for commercial and industrial use.
Common applications include raft foundations,

Piling and external slabbing and pacing that will be subject to the constant loading and scraping imposed by industrial vehicles and machinery.

 mixes have an air entrainment additive to create standard sized air bubbles in the concrete. This helps to protect the surface from freeze-thaw cycles, making it especially useful for outdoor paving.