Effect of Magnesian-Expansive Components in Steel Slag on the Volume Stability of Cement-Based Materials.

Millimeter-scale magnesian refractory granules were found to be a unique magnesian-expansive component in steel slag. To systematically study the effects of these granular magnesian-expansive components on the volume stability of cement-based materials containing steel slag, an investigation of their existing forms and influence on the volume stability was conducted in this paper. The various-sizing waste-magnesium-chromate-based refractory brick (Mg-Cr brick) granules and different (FeO + MnO)/MgO ratios' synthetic MgO·FeO·MnO ternary solid solutions granules were adopted to simulate magnesian-expansive granules by partially replacing manufactured sand in mortar.