Study on the Mechanical Properties and Hydration Behavior of Steel Slag–Red Mud–Electrolytic Manganese Residue Based Composite Mortar

The functional and mechanical properties of steel slag (SS)–red mud (RM)–electrolytic manganese residue (EMR)-based composite mortar under different matching ratio conditions were investigated in this paper to examine the synergistic cementing effect among multiple solid wastes. hydration characteristics its microstructure characterized by heat assessment, X-ray diffraction, thermogravimetric analysis, other tests. results study showed that compared with pure cement group, 30% SS alone will inhibit reaction slurry, thus reducing mortar, while compounding appropriate amount RM, EMR can effectively reduce negative impact on mortar. flexural compressive strengths at 28 d highest when 15% SS, 12% 3% mixed, which 7.2 MPa 41.4 d, respectively. Compared test group alone, increased 18.0% 25.5%. This is mainly because incorporation RM not only plays role physical filling, but free alkali sulfate material also compoundly stimulate activity produce more calcium alumina (AFt) hydrated silicate (C–S–H gel), improving makes overall decrease 26.35% multiharmful harmful pores increase harmless less specimens 43.57%.