AUTHOR=Allan Nye Scott , Vineet Shah , Christopher Oze , Barnaby Shanks , Chris Cheeseman TITLE=Use Of Olivine For The Production Of MgO-SiO2 Binders JOURNAL=Frontiers in Built Environment VOLUME=7 YEAR=2021 URL=https://www.frontiersin.org/journals/built-environment/articles/10.3389/fbuil.2021.640243 DOI=10.3389/fbuil.2021.640243 ISSN=2297-3362 ABSTRACT=

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.