high-strength concrete
Quality
The quality of cements is supervised
by the TSÚS (Building
Testing and Research
Institute), Bratislava.
CEMMAC is a holder of an
ISO 9001: 2008 quality
management certificate
and an ISO 14001: 2004 environmental
management certificate.
Portland-slag cement
Quick-setting cement suitable for the production of high-strength concrete and for structures or concrete elements requiring a rapid increase in early strengths. The higher development of heat of hydration also predetermines it to concreting at lower ambient temperatures.
Characteristics
CEM II / B-S 42,5R is a cement produced by fine grinding of Portland clinker, granulated blast-furnace slag (6-20% according to EN 197-1) and gypsum. It attains 2-day strengths ranging from 26 to 32 MPa and standard 28-day strengths of 55 to 61 MPa.
Use
- concretes for difficult concrete structures
- concrete elements and structures requiring a rapid increase in early strengths
- prefabricated concrete elements and construction components (paving, permanent shuttering, kerbs, …)
- industrial floors
- external hard surfaces made of concrete
- plain concrete and reinforced concrete even of higher strength classes
- cement screeds
Advantages
- a rapid increase in early strength and high final strengths
- very good workability and soundness
- higher development of heat of hydration
- moderate resistance to chemical aggression (up to the XA1 environment)
| Essential properties | Harmonized Standard EN 197-1 |
CEMMAC CEM II/A-S 42,5 R |
| 2-day compressive strength (MPa) | => 20 | 26 – 32 |
| 28-day compressive strength (MPa) | => 42,5 =< 62,5 | 55 – 61 |
| Initial setting time (min) | => 60 | 180 +- 30 |
| Volume stability Le-Chatelier (mm) | =< 10 | 0,0 – 1,5 |
| SO3 sulphate content (%) | =< 4 | 3,2 +- 0,2 |
| Chloride content (%) | =< 0,10 | 0,04 +- 0,03 |
| The content of tricalcium aluminate in this cement is less than 5%. | ||
Nárast pevností CEM II/A-S 42,5 R
| Documents for download |
| Technical sheet CEM II/A-S 42,5R |