Looking Ultra Fine, GBFS
To reduce CO2 emissions, the proportion of Portland clinker in cements should be minimised. While this lowers early strength, this can be boosted by using reactive fine materials. Loesche has developed a multicyclone plant that produces fine composites with low energy demand. Tests with granulated blast furnace slag (GBFS) showed that these so-called ‘ultra-fines’ (U/Fines) significantly improve the early strength of slag-rich cements, enabling their use in challenging applications like precast elements or shotcrete. The coarse fraction can still be used in conventional cements. Studies with other materials, such as calcined clay, steel slag and limestone also highlight the potential of these U/Fines for enhancing low-clinker cements.
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Published in the November 2024 issue of Global Cement Magazine.