STUDY OF THE INFLUENCE OF POLYMER ADDITIVES ON THE PROPERTIES OF DRIED DRY BUILDING MIXTURES

The theoretical prerequisites for obtaining porous mortars modified with polymer additives based on dry construction mixtures and experimental studies on determining the influence of these additives on the parameters of mixture preparation and on the rheological and physico-mechanical properties of porous mortar are presented. The article presents the results of theoretical-experimental studies of the complex influence of polymer additives on the properties of dry construction mixtures made with an activated mineral component - Portland cement and mineral fillers and microfillers based on local raw materials. The main results of experimental studies of porous compositions of dry mixtures for floors with the addition of polymer additives are given. It was established that the modification of dry building mixtures based on Portland cement and activated mineral fillers with polymer additives allows to increase by 25-40% the physical and mechanical properties of hardened solutions for floors and to obtain compositions with a compressive strength of up to 16.3 MPa, as well as to significantly improve the rheology of the mortar mixtures and reduce shrinkage phenomena when introducing corrosive additives without increasing the water consumption of the mixture and overusing the binder.