Stabilization of a Clay Soil Using Cementing Material from Spent Refractories and Ground-Granulated Blast Furnace Slag

Nowadays, huge amounts of refractory materials are generated around the world. The majority them lack valorization methods. This study analyzes ability a doloma and two magnesia spent wastes as soil stabilizers on their own, well when combined with Ground-Granulated Blast Furnace Slags (GGBS). These showed limited for soil’s plasticity modification from index 15.6 to minimum 12.7. high pH additives increased 7.88 values in range 10.94–11.25 before 28 days, allowing development pozzolanic reactions. Unconfined compressive strength (UCS) along curing time, reaching maximum value 5.68 MPa after 90 days. Based UCS, optimum GGBS ratios oscillate between 30:70 50:50. UCS soaking samples reduced unsoaked results 68.70% 94.41%. binders considered low effect against swelling delayed expansive effects because MgO hydration. Finally, X Ray Diffraction (XRD) tests that stabilization only slightly modified combinations mineralogy formation Magnesium Silicate Hydrate (MSH) gels.