| 摘要 |
<p>It is aimed at inexpensively providing a heavy aggregate comprising particles having particle diameters and densities suitable as a fine aggregate of a heavy concrete, heavy mortar, or the like, and there are provided: (i) a heavy aggregate comprising particles including, as a main constituent component, at least one of FeO, Fe2O3, and metal iron, characterized in that spherical particles are included in an amount of 20% or more in the whole of particles, and particles passing through a sieve having a nominal size of 0.15 mm are included in an amount of 10% to 20% in mass percentage in the whole of particles; and (ii) the above-described heavy aggregate characterized in that the heavy aggregate is obtained by mutually mixing at least two or more kinds selected from: mill scales brought about in a rolling process of steelmaking; coarse particle components sievedly caught at a particle diameter of 50μm from steelmaking converter dusts; and pig iron particles separated from blast furnace granulated slags.</p> |
