The effect of sodium tripolyphosphate on the properties of medium-cement refractory castables based on Gorkal-40 cement

Abstract

Adding sodium tripolyphosphate as a mix component of a medium-cement refractory castable is shown to modify some of the castable’s properties. A correlation has been established between the concentration of sodium tripolyphosphate additive and the electrical conductivity (EC) of a suspension compositionally close to the castable, which makes it possible to follow the kinetics of heat release in the paste using EC measurements. A relationship between the Na tripolyphosphate concentration and the setting time of the paste is discussed.