What Do You Understand by M25 Concrete? › Category: Civil Engineering › What Do You Understand by M25 Concrete? 0 Vote Up Vote Down Editor">Editor Staff asked 2 years ago What Do You Understand by M25 Concrete? 1 Answers 0 Vote Up Vote Down Editor">Editor Staff answered 2 years ago According to IS 456 : 2000, M refers Mix and 25 refers the characteristic compressive. Strength of concrete cube of 150mmX150mmX150 mm tested at the end of 28 days should be minimum 25 N/Sq.mm