Study on Properties of Aerated Concrete Prepared with Iron Ore Tailings

Abstract

The present study demonstrated a feasible approach of utilizing waste iron ore tailings (IOT) and epoxy resin (ER) in preparation for aerated concrete. The aerated concrete (ACT) prepared with IOT was prepared by mixing iron ore tailings of 60%, lime of 25%, cement of 15%, while aluminum powder of 0.4% and ER of 3% on the basis of the proportion of above powder. The compressive strength of the finished ACT samples with the volume density of 610 kg/m3 were 3.39 MPa. The major mineral phase in ACT product were tobermorite-11A, C-S-H and quartz, and most of the cementitious phases were generating through hydrothermal reaction. Moreover, the incorporation of ER of 3% could improve the structure of the pore wall, and make this system become a spatial network structure. Further more, the current study provided a further method of consuming waste iron ore tailings.