Use Of Olivine For The Production Of MgO-SiO2 Binders

The potential for using MgO and SiO₂, recovered from olivine, was investigated for use as a cementitious binder system. The MgO to SiO₂ proportion for the binder was fixed at 1:1. The nature of the hydration products were characterized using a variety of techniques including isothermal calorimetry, XRD, FTIR, and SEM. The primary binding component of the paste was determined to be magnesium silicate hydrate (M-S-H). The recovered silica exhibited faster reactivity compared to commercially available silica fume. Compressive strengths in excess of 20 MPa were obtained using the materials recovered from olivine.

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