Granulated Blast Furnace Slag, Fine Aggregate Obtained Therefrom, And Manufacturing Method Thereof

摘要

Novel granulated blast furnace slag, which has a mass per unit volume of at least 1.45 kg/l and a fineness modulus of at least 3.7, can be simply and effectively obtained by causing blast furnace slag of 1350 to 1400 DEG C to flow at a quantity of flow of 2 to 5 ton/min and by ejecting water to the slag at a flow velocity of 5 to 8 m/sec and at a rate of quantity of flows by weight of water/slag of 7 to 15. Since the granulated blast furnace slag has a high grain size and a high density which cannot be obtained conventionally, it can be preferably used as fine aggregate for concrete when the grain size thereof is adjusted by crushing/grinding, or the like. IMAGE