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.
