Mathematical Model of the Strength of Modified Cement Stone

The present work investigates the strength properties of modified cement stone and polymer-cement compositions made from it. The control of the strength properties is achieved by recipe regulation of the mineral component of the multi-component binder. This makes it possible to significantly increase not only the strength of the materials, based on them, but also their reliability and durability. Dependencies, describing the influence of complex polymer additive consisting of superplasticiser, stabiliser and redispersible polymer powder on the strength of cement stone were obtained; coefficients reflecting the influence of polymers on the strength of cement stone were determined; functions of coefficient values depending on the dosage of additives were obtained. Based on the data obtained, a mathematical model of the strength properties of cement stone under the influence of complex additives was created. The developed multiplicative model for evaluating the influence of modifiers on the properties of polymer-cement composites allows to determine and predict the strength properties of polymer-cement composites to design composites with predetermined constructional properties.