A very lean nominal mix used only as a clean, non-structural base beneath foundations. Not for any load-bearing element.
Mix ratio
1 : 5 : 10
Cement : Sand : Aggregate
Proportions & strength
M5 lean concrete: proportions by volume, typical compressive strength and use.
Designation
M5
Ratio (by volume)
1 : 5 : 10
Cement
1 part
Sand
5 parts
Aggregate
10 parts
Typical compressive strength
725 psi · 5 MPa
Typical use
Blinding / levelling course under footings.
Planning reference. Strengths are typical values for a well-made mix at 28 days, not a guaranteed design strength. Structural work must follow your local building code and a qualified engineer's mix design.
Where M5 is used
A very lean nominal mix used only as a clean, non-structural base beneath foundations. Not for any load-bearing element.
Nominal mixes like this are proportioned by volume on site and suit general and domestic work. Anything structural - reinforced, load-bearing or engineered - should use a design mix proportioned by weight from tested materials.
Need quantities? The volume calculators give the cubic yards, cubic metres and bag counts for the pour this mix goes into.