Some rheological properties of composite slag–cement mortars with secondary industrial waste

The study presents an investigation of rheological properties of mortars made with a new formulation of composite slag–cement for building purpose, which has been patented. The rheokinetics of the initial stages of hydratation process in this cement slurries is studied. The influence of concentration of a new type active additive on the alteration of apparent viscosity of the slag–cement mortar is investigated. It has also been studied the effect of the composition of slag–cement slurry and the change of water–cement ratio on the rheological behavior of it. It is shown, that in relation to concentration the active additive presents a different action on the apparent viscosity. At low concentration it play role as plastification additive, but after a certain concentration considered as threshold it demonstrates an acceleration effect.