Slag cement

   
   

A slag cement having an improved early strength and containing aluminosilicates, blast furnace slag, clinker and CaSO.sub.4, has a content of 70 to 95% by weight of blast furnace slag used in the ground form at >4,500 Blaine (cm.sup.2 /g) with no more than half of this portion being substitutable by aluminosilicates such as fly ash, alumina, marl or the like, 0.1 to 2% by weight of clinker, sulfate in amounts of below 5% by weight, calculated as SO.sub.3, and 0.3 to 1% by weight of a superliquifier such as, e.g., naphthalene sulfonate.

 
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