Study of rheological properties of lime–metakaolin slurries

Abstract

Lime–kaolin residue (metakaolin) slurries were rheologically characterized by high stress flow, low strain oscillatory, and creep and relaxation tests. All lime and lime–metakaolin slurries presented flow curves with rheological behavior, which is well fitted by the Herschel–Bulckley model. In addition, they exhibited a predominantly elastic behavior, acting as a viscoelastic liquid. The presence of metakaolin resulted in less rigid and more elastic slurries, reducing the initial yield stress and viscosity of the lime-based slurries, regardless of the metakaolin content.