TS EN 15167-1

TS EN 15167-1 is the first part of the standard for ground granulated blast furnace slag used in concrete, mortar and grout. It sets out the definitions, properties and conformity criteria for this material when it is used as a type II addition in concrete, and it also recognizes use in mortar and grout. In practical terms, it addresses the material itself, not the detailed rules for how a concrete mix is designed or placed on site.

What ground granulated blast furnace slag does in mix design

Ground granulated blast furnace slag is produced by grinding blast furnace slag from ironmaking into a fine mineral addition. As a general technical concept, finely ground supplementary mineral materials can influence fresh and hardened concrete by changing particle packing, workability, heat development and long-term performance. The exact effect depends on the mix design and the surrounding cement system. This standard does not explain those design choices; it defines the quality and conformity framework for the slag product itself.

Where the standard draws the boundary

• Requirements for chemical and physical properties
• Quality control and conformity criteria
• Use as a type II addition in concrete, including structural concrete to EN 206-1
• Potential use in mortar and grout
• Material containing added substances other than grinding aids is outside scope
• It does not specify practical application details such as composition, mixing, placing or curing

For users, the value of this document lies in distinguishing the product definition from the construction process: it helps ensure that the slag being supplied has the expected technical characteristics and can be assessed consistently. The actual application rules remain with the relevant concrete, mortar or grout standards.