Sep 21 2015 · mix design m25 1 q no design a concrete for strength m25 i e 25 𝑵 𝒎𝒎 𝟐 specification of materials a grade designation m25 b type of cement opc 43 grade c max nominal size of 20mm down aggregate d min cement contnt 300 𝑲𝒈 𝒎 𝟑 e water cement ratio 0 50 f workability 75mm slump g exposer condition moderate r c c h method of concrete manual …