Breadcrumbs

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.

Chemical properties

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

Physical/mechanical properties

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.

Current applications

  • 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 

Documents

Production and distribution structure

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Environmental certification ISO 14001 Environmental certification ISO 14001