Type I 52,5 N SR5

This cement contains at least 95% clinker and up to 5% minor constituents, not including the addition 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).

The designation SR means that the cement is sulfate-resistant, an additional property of the product based on 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 <3,3% <=3,5%
Chlorides (Cl-) EN 196/2 <0,08% <=0,10%
Loss on ignition EN 196/2 <5,0% <=5,0%
Insoluble residue EN 196/2 <2,0% <=5%
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 4000/5300 cm2/g  
Initial setting time EN 196/3 >90 min >=45 min
Volume stability EN 196/3 <=10 mm <=10 mm
Flow test UNI 7044 >80%  
Compressive strength after curing for EN 196/1    
2 days   >35,0 MPa >=30,0 MPa
28 days   >55,0 MPa >=52,5 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

  • Standard and non-standard reinforced concrete for works requiring significant early and final strengths
  • Concrete for prefabricated and/or prestressed structures, also with pre-tensioned tendons
  • Concrete for works requiring formwork removal shortly after pouring
  • Concrete for precast elements with or without accelerated curing
  • Concrete for works requiring resistance to aggressive environments due to chemical attack
  • Concrete for works requiring resistance to marine environments


Production and distribution structure

Bulk Bulk
Bag Bag
Big Bag Big Bag
Available in bag Available in bag [produced in other factory]
Export Export
Environmental certification ISO 14001 Environmental certification ISO 14001