Chemically-bonded cementitious materials based on metakaolin

Abstract

Cementing materials based on metakaolin have been investigated. Parameters studied include the physical, chemical and mineralogical nature of the reactants, their mixing ratio, order of addition of mix components, cure duration, microstructure and phase development, and compressive strength. In general, elevated cure temperatures were required to develop the best strengths but binder phases with low crystallinity were generally preferable to the more crystalline binders obtained at >85°C. Additional characterization data for the products are presented and suggestions are made for the further development of silicate cements based on metakaolin