Suggested Use for Various Concrete Grades and Nominal Mixes

Grade	Nominal mix	Use
C7 C10	1:3:8 1:4:6 1:3:6 1:4:5 1 :3:5	Strip footings; trench fill foundations; stanchion bases; non reinforced foundations; oversite concrete and bindings under slabs; floors with very light traffic; mass concrete, etc.
Cl5 C20	1:3:5 1:3:4 1:2:4 1:3:3	Foundation walls; basement walls; structural concrete; walls; reinforced floor slabs; floors for dairy and beef cattle, pigs and poultry; floors in grain and potato stores, hay barns, and machinery stores; septic tanks, water storage tanks; slabs for farm yard manure; roads, driveways, pavings and walks;stairways.
C25 C30 C35	1:2:4 1:2:3 1:1.5:3 1:1:2	All concrete in milking parlours, dairies, silage silos and feed and drinking troughs; floors subject to severe wear and weather or weak acid and alkali solutions; roads and pavings frequently used by heavy machinery and lorries; small bridges; retaining walls and dams; suspended floors, beams and lintels; floors used by heavy, small-wheeled equipment, for example lift trucks; fencing posts, precast concrete components.
C40 C50 C60		Concrete in very severe exposure; prefabricated structural elements; pre-stressed concrete.