Type III/B 42,5 N LH/SR

The percentages indicated do not include additions of calcium sulfate and additives.
Known for its controlled early strength development, and thanks to the aluminate content in the clinker, this cement offers high/very high resistance to sulfates and a controlled development of the heat of hydration (additional LH designation).  This cement conforms to the harmonized European standard EN 197/1 and displays the EC marking as required by European regulation 305/2011 (CPR).

The SR designation – sulfate resistance – refers to the additional property of the product based on the composition and performance requirements established 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 <2,8% <=4,0%
Chlorides (Cl - ) EN 196/2 <0,08% <=0,10%
Loss on ignition EN 196/2 <=2,0% <5,0%
Insoluble residue EN 196/2 <=1,0% <5,0%
Heat of hydration EN 196/8 < 250 j/g < 270 j/g
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 area EN 196/6 4000-5000 cm2/g  
Initial setting time EN 196/3 >160 min >=60 min
Volume stability EN 196/3 <=10 mm <=10 mm

Compressive strength after curing for

EN 196/1    
2 days   >12,0 MPa >=10,0 MPa
28 days   >47,0 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

  • Reinforced concrete for in-ground and above-ground works requiring high final strength
  • Concrete for foundations and works in aggressive environments
  • Concrete in contact with seawater
  • Concrete for massive pours requiring the controlled development of the heat of hydration
  • Concrete for road and rail works, including paving
  • Wet-process sprayed concrete for tunnel linings
  • Sewage works


Production and distribution structure

Piazza Cavalcanti, 11
50040 Settimello (FI)
phone 800 015436

Bulk Available in bag

Via Serravalle, 49
15061 Arquata Scrivia (AL)
phone 800 025525


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