Type IV/A (P) 42,5 R-SR - Tipo IV/A (P) 42,5 R-SR - Buzzi Unicem Italia

Type IV/A (P) 42,5 R-SR

This cement contains: 65-89% clinker with a low calcium aluminate content, 11-35% 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.

CGreen

Product with a lower environmental impact formulated to uphold the principles of sustainability and offer construction solutions that meet the latest environmental standards. The criteria used to define the CGreen line are based on the GWP (Global Warming Potential) indicator, which is included in the Environmental Product Declaration (EPD) to quantify the Carbon Footprint of cement and the entire supply and production chain.
The percentage of recycled content has also been identified for each cement to define the circularity indicator by cement type.

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	<0,07%	<=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	4000-5200 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		>24,0 MPa	>=20,0 MPa
28 days		>48,0 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 good early and final strengths
Concrete for foundations and works in aggressive environments
Wet-process sprayed concrete for tunnel linings
Concrete in contact with seawater
Sewage works
Concrete for road and rail works
Concrete for works requiring resistance to aggressive environments due to chemical attack