Cement suitable for
massive structures and stabilization of soils

Cement CEM III/A 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 man-
agement certificate and an
ISO 14001: 2004
environmental manage-
ment certificate.
Reduced emissions CO2

CEM III/A 42,5 N
slag cement

Cement for all conventional concrete works requiring high final strengths with a slower increase in strengths and a longer workability. Cement suitable for the production of ready-mixed concrete and for stabilization of soils. The lower development of heat of hydration also predetermines it to concreting in warm weather and to massive structures.


CEM III/A 42,5N is a cement produced by fine grinding of Portland clinker, granulated blast-furnace slag and gypsum. It attains 2-day strengths ranging from 15 to 20 MPa and standard 28-day strengths of 48 to 55 MPa.


  • monolithic and massive concrete structures
  • plain concrete and reinforced concrete of common strength classes
  • concrete structures within water structures
  • hard surfaces made of concrete
  • concretes and concrete elements exposed to mechanical load
  • subconcretes and cement screeds
  • production of small concrete elements
  • stabilization of soils


  • very good workability of concretes and soundness
  • low development of heat of hydration and a gradual increase in strengths
  • high final strengths which increase continuously within 90 days from the creation of the mix
  • a light colour of the resulting concrete
  • the optimum slag content causes higher resistance to moderately aggressive environment (XA1 environment)

Essential Properties Harmonized
Standard EN 197-1
CEM III/A 42,5 N
2-day compressive strength (MPa) =>10 15 – 20
28-day compressive strength (MPa) => 42,5 =< 62,5 48 – 55
Initial setting time (min) => 60 200 +- 260
Volume stability Le-Chatelier (mm) =< 10 0,0 – 3,0
SO3 sulphate content (%) =< 4,0 2,8 +- 3,2
Chloride content (%)) =< 0,10 0,03 +- 0,08
The content of tricalcium aluminate in this cement is less than 5%.

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