用细粒铁尾矿制备细骨料混凝土的试验研究

Test Research on Preparation of Fine Aggregate Concrete with Fine Iron Tailings

将某-0.074 mm占74.5%的细粒铁尾矿按0.045 mm分级,通过热活化处理改善-0.045 mm尾矿的反应活性,并将其制备成复合胶凝材料,然后与+0.045 mm尾矿制备成细骨料混凝土。制品尾矿掺量达到70%,28 d抗压强度达到99 MPa。

By classifying fine iron tailings with-0.074 mm of 74.5% to be-0.045 mm,the thermal activation is adopted to improve the reaction activity of-0.045mm iron tailings which are prepared to be the compound Cementitious Materials.This material is mixed with ＋0.045 mm tailings to make fine aggregate concrete.There are 70% of tailings in preparation and the compression strength of up to 99 MPa at 28 d.