Harmonised conditions for the marketing of common cements

1. Harmonised conditions for the marketing of common cements Ing. Lukáš Peřka Research Institute of Binding Materials Prague, Ltd. Na Cikánce 2, Praha 5, Czech Republic perka@vumo.cz

2. Research Institute of Binding Materials Prague, Ltd. Complete service for basic construction product. Technology - development, innovation and testing of chemical processes and production. Information and marketing service. Standardization – Centre of technical standardization

3. Free Trade within EU For a free product placement within EU market must be ensured harmonised conditions for the marketing of products. For construction products – Regulation EU No. 305/2011 laying down harmonised conditions for the marketing of construction products and repealing Council Directive 89/106/EEC of 21 December 1988. Regulation describes seven basic requirements for construction works: mechanical resistance and stability; safety in case of fire; hygiene, health and the environment; safety and accessibility in use; protection against noise; energy economy and heat retention; sustainable use of natural resources.

4. Construction Product Regulation and European Standards- harmonisation If the requirements described in the standard are in the compliance with the requirements of Regulation → Standard is harmonized with Regulation → harmonized European standard of product. The European Commission assigns the European Committee for Standardization (CEN) to prepare and approve the draft of European standard. Two conditions for the application of European standards: The standard must be approved by CEN. The standard must be announced in OJEC.

5. CEN/TC 51 – Technical committee Technical Committee CEN/TC 51 “Cement and building limes” CEN/TC 51 prepares European standards for: common cement and special cements; other hydraulic binders; building limes; conformity evaluation; methods of testing.

6. EN 197-1 Cement – Part 1: Composition, specification and conformity criteria for common cements EN 197-1 defines and gives the specifications of 27 distinct common cements, 7 sulfate resisting common cements, 3 distinct low early strength blast furnace cements, 2 sulfate resisting low early strength blast furnacecements and their constituents. This harmonised European standard is completed by EN 197-2 Conformity evaluation EN 196 Methods of testing cement (Part 1 – 10).

7. EN 197-1cement types According to the content of the main components the cements are grouped into five main cement types: CEM I Portland cement; CEM II Portland-composite cement; CEM III Blast furnace cement; CEM IV Pozzolanic cement; CEM V Composite cement and furthermore there are also each types of cement differ in the content of main components → 27 products in the family of common cements

9. EN 197-1mechanical requirements Standard strength - compressive strength at 28 days (EN 196-1); - strength classes [MPa]: 32,5; 42,5; 52,5. Early strength - compressive strength at 2 or 7 days (EN 196-1); - early strength classes [MPa]: - ordinary: N; - high: R; - low: L (only applicable for CEM III cements).

10. EN 197-1physical requirements Initial setting time - determined in accordance with EN 196-3, - 32,5 Mpa ≥ 75 minutes; - 42,5 Mpa ≥ 60 minutes; - 52,5 Mpa ≥ 45 minutes. Soundness - determined in accordance with EN 196-3, - expansion ≤ 10 milimetres. Heat of hydration - determined in accordance with EN 196-8 or EN 196-9; - for low heat common cements ≤ 270 J/g.

11. EN 197-1chemical requirements The chemicalproperties of the cements of the cement type and strength class shall conform to the requirements listed in following table when tested accordance with the referred standard.

13. EN 197-1durability In many applications, particularly in severe environmental conditions, the choice of cement has an influence on the durability of concrete, mortar and grouts, e.g. frost resistance, chemical resistance and protection of reinforcement. Alkalis from cement or other concrete constituents may react chemically with certain aggregates. Adequate requirements are given in EN 206-1.

14. EN 197-1sulfate resistance Sulfate resisting common cement shall fulfil the additional chemical requirements specified in following table. Sulfate resisting common cements shall be identified by the notation SR.

16. EN 197-1standard designation Portland cement EN 197-1 – CEM I 42,5 R Portland cement, conforming to EN 197-1, of strength class 42,5 with high early strength Portland-composite cement EN 197-1 – CEM II/A-M (S-V-L) 32,5 R Portland-composite cement, conforming to EN 197-1, containing in total a quantity of granulated blast furnace slag (S), siliceous fly ash (V) and limestone (L) of between 12 % and 20 % by mass and of strength class 32,5 with high early strength Blast furnace cement EN 197-1 – CEM III/B 32,5 N – LH/SR Blast furnace cement, conforming to EN 197-1, containing between 66 % and 80 % by mass of granulated blast furnace slag (S), of strength class 32,5 with an ordinary early strength and a low heat of hydration and sulfate resisting.

17. EN 197-1conformity criteria Conformity of the products to this standard shall be continually evaluated on the basis of testing of spot samples. The properties, test methods and the minimum testing frequencies for the auto control testing by the manufacturer are specified in this standard also. Concerning testing frequencies for cement not being dispatched continuously and other details see EN 197-2.

18. EN 197-1Annex ZA - harmonization The clauses of this European standard, shown in this Annex ZA, meet the requirements of the mandate given under the EU Construction Products Directive (89/106/EEC). When compliance with the conditions of this AnnexZA is achieved, the certification body shall draw up a certificate of conformity (EC Certificate of conformity), which entitles the manufacturer to affix the CE marking.

19. EN 197-1CE marking

20. Thank you for your attention.