Influence of the granulation conditions and ­performance potential of granulated blastfurnace slag – Part 2: Chemistry and physical properties

Laboratory granulation is highly suitable as a means of demonstrating both the influence of different chemical compositions of granulated blastfurnace slag on its reactivity and the influence of different granulation conditions on the physical properties of granulated blastfurnace slag. The second part of this article deals with the chemistry.

3.2 Physical properties and reactivity
It is theoretically possible that changed grain morphology could be associated with a changed glass structure, and therefore also with changed reactivity of the granulated blastfurnace slag, even if the glass content and chemical composition are constant. However, using the examples of granulated blastfurnace slags HS D, HS D.0 and HS D.9 Fig. 13 shows that the mortar strengths (DIN EN 196-1) of blastfurnace cements (slag/­clinker = 75/25) containing granulated blastfurnace slags with widely differing grain morphology (­Table 2) but virtually constant...

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