What is M25??

M25 is a representation for a grade of concrete used in construction. This shows the strength that is attained by the concrete cast from this type at 28th day. The M25 grade concrete comes under the nominal concrete category which can be easily designed with the help of IS 10262:2009.

In more simple words M 25    means,

• M stands for Mix
• 25 is the characteristic compressive strength

What is Characteristic Compressive Strength??

The characteristic strength is defined as the strength of the concrete below which not more than 5% of the test results are expected to fall.

For example, if you cast 100 cubes and test their compressive strength after 28 days using a compression testing machine, then not more than 5 cubes should fail at a value lesser than 25kN/mm2.

Read More >> Characteristic Mean Strength