Ideal cement for ready-mixed concrete production

Cement CEM II/B-S 42,5N usage

The quality of cements is su-
pervised by the TSÚS (Build-
ing Testing and Research
Institute), Bratislava.
CEMMAC is a holder of an
ISO 9001: 2008 quality
management certificate
and an ISO 14001: 2004 en-
vironmental management
Reducted emmision CO2

CEM II/B-S 42,5N
Portland-slag cement

All-purpose cement for all types of concrete work requiring high final strength and a higher structural load capacity. Ideal cement for the production of ready-mixed concrete. The low development of heat of hydration also predetermines it to concreting in warm weather.


CEM II / B-S 42,5N is a cement produced by fine grinding of Portland clinker, granulated blast-furnace slag (21-35% according to EN 197-1) and gypsum. It attains 2-day strengths ranging from 17 to 24 MPa and standard 28-day strengths of 47 to 55 MPa.


  • plain concrete and reinforced concrete even of higher strength classes
  • monolithic and massive concrete structures
  • concrete structures within water structures
  • hard surfaces made of concrete
  • concretes and concrete elements exposed to mechanical load
  • subconcrete and cement screeds


  • very good workability and soundness
  • very good pumpability of concretes
  • low development of heat of hydration
  • high final strengths
  • moderate resistance to chemical aggression (up to the XA1 environment)

Essential properties Harmonized
Standard EN 197-1
CEM II/B-S 42,5 N
2-day compressive strength (MPa) => 10 17 – 24
28-day compressive strength (MPa) => 42,5 =< 62,5 47 – 55
Initial setting time (min) => 60 190 +- 30
Volume stability Le-Chatelier (mm) =< 10 0,0 – 1,5
SO3 sulphate content (%) =< 3,5 3,1 +- 0,2
Chloride content (%) =< 0,10 0,05 +- 0,03
The content of tricalcium aluminate in this cement is less than 5%

Increase in strengths CEM II/B-S 42,5NCement CEM II/B-S 42,5N graph

Documents for download
Technical sheet CEM II B-S 42,5N