CEM II/A-S 42,5R
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.
Cement for high-strength concrete
CEM II/A-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 25 to 29 MPa and standard 28-day strengths of 57 to 61 MPa.
| Essential properties | Harmonized Standard EN 197-1 | CEMMAC CEM II/A-S 42,5R |
|---|---|---|
| 2-day compressive strength (MPa) | ≥ 20 | 25 - 29 |
| 28-day compressive strength (MPa) | ≥ 42,5 ≤ 62,5 | 57 - 61 |
| Initial setting time (min) | ≥ 60 | 200 ± 30 |
| Volume stability (expansion) – Le-Chatelier (mm) | ≤ 10 | 0,0 – 2,0 |
| SO3 sulphate content (%) | ≤ 4,0 | 2,6 - 3,0 |
| Chloride content (%) | ≤ 0,10 | 0,02 – 0,09 |
- 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
- a rapid increase in early strength and high final strengths
- very good workability and soundness
- higher development of heat of hydration
The quality of cements is supervised by TSÚS Bratislava. CEMMAC holds an ISO 9001:2008 Quality Management certificate and an ISO 14001:2004 Environmental Management certificate.