Type IV/A (P-V) 42,5 N-SR - Type IV/A (P-V) 42,5 N-SR - Buzzi Unicem Italia
Type IV/A (P-V) 42,5 N-SR
This cement contains: 65-89% clinker with a low calcium aluminate content, 11-35% fly ash and pozzolanic material. A maximum of 5% minor constituents is permitted. The percentages indicated do not include additions of calcium sulfate and additives.
Known for its rapid early strength development and due to the low aluminate content in the clinker, this cement offers special advantages such as the high/very high resistance to sulfates, suitability for use in marine environments, and controlled development of the heat of hydration. The cement conforms to the harmonized European standard EN 197/1 and displays the CE marking as required by European regulation 305/2011 (CPR).
"SR" means that the cement is sulfate-resistant, an additional property of the product in accordance with the composition and performance requirements specified in tables 2 and 5 of EN 197/1.
|Parameter||Test Method||Indicative values (1)||Specified characteristic limits|
|Sulfates (SO3)||EN 196/2||<2,80%||<=3,0%|
|Chlorides (Cl - )||EN 196/2||<0,05%||<=0,10%|
|Pozzolanic activity test (8 days)||EN 196/5||positive||positive|
|Water-soluble chromium VI||EN 196/10||<=2 ppm||<=2 ppm|
|Parameter||Test Method||Indicative values(1)||Specified characteristic limits|
|Blaine Specific surface||EN 196/6||3200-4500 cm2/g|
|Initial setting time||EN 196/3||>130 min||>=60 min|
|Volume stability||EN 196/3||<=10 mm||<=10 mm|
|Compressive strength after curing for||EN 196/1|
|2 days||>21,0 MPa||>=10,0 MPa|
|28 days||>46,0 MPa||>=42,5 MPa|
(1) The values represent the level above (or below) the reasonably expected median values for the parameters indicated of BUZZI UNICEM cements belonging to the type and class named in the headers. These values are calculated on a yearly basis and take into account internal self-inspection data.
- Concrete for foundations and any works in moderately aggressive environments
- Concrete for works requiring thick pourings (dams, barriers, etc.)
- Concrete in contact with seawater
- Sewage works
- Soil reinforcement works, ranging from injections to jet-grouting systems
- Concrete for works requiring resistance to aggressive environments due to chemical attack