BS EN 197-1:2011
Cement Part 1: Composition, specifications and conformity criteria for common cements
39
Cement Types
10
Main Constituents
3
Strength Classes
2011
Published
Cement Types
Main Constituents & Composition
Strength Classes - L/N/R Variants
Critical Correction
Strength classes are completely separate from cement types.
L (Low early strength): Only available for CEM III cements
N (Normal early strength): Available for all cement types
R (Rapid early strength): Available for all except CEM III-L combinations
Chemical requirements are determined by cement TYPE, not strength class.