Requirements for standard strength and early strength

Strength class Compressive strength MPa
Early strength Standard strength
2 days 7 days 28 days
32,5 N -  16,0  32,5  52,5
32,5 R  10,0 -
42,5 N  10,0 -  42,5  62,5
42,5 R  20,0 -
52,5 N  20,0 -  52,5 -
52,5 R  30,0 -