Use Of Olivine For The Production Of MgO-SiO2 Binders
Scott Allan Nye, Vineet Shah, Christopher Oze, Shanks Barnaby, Cheeseman Chris
Abstract
The potential for using MgO and SiO 2 , recovered from olivine, was investigated for use as a cementitious binder system. The MgO to SiO 2 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.
Topics & Concepts
OlivineSilica fumeCementitiousMaterials scienceSilicateHydrateIsothermal processCalorimetryFourier transform infrared spectroscopyCalcium silicate hydrateMineralogyMagnesiumChemical engineeringCompressive strengthComposite materialCementMetallurgyChemistryOrganic chemistryThermodynamicsEngineeringPhysicsMagnesium Oxide Properties and ApplicationsConcrete and Cement Materials ResearchNuclear materials and radiation effects