ADHESIVE AND TECHNOLOGICAL PROPERTIES OF MORTARS BASED ON SLAG-ALKALINE DECORATIVE CEMENTS

Abstract

Studies have shown that the use of slag-alkali cements as decorative is quite promising and attractive. When using bleaching additives TiO2, kaolin and CaCO3, white cements with a degree of whiteness of 70 ... 94% were obtained. But in addition to the decorative properties of such cements and materials based on them, there are requirements to ensure the necessary technological and stable performance properties. The article is devoted to the study of one of the most important characteristics of finishing decorative mortars - its adhesion to the base and the water holding capacity of the mortar. This has a significant effect on the durability and other performance characteristics of the coating. As a result of research it was established that slag-alkaline decorative mortar compositions have high adhesion, which has 5,22…5,52 MPa per separation and was higher than the strength of the base. The water holding capacity of cement-sand slag-alkali decorative mortars prepared in the laboratory is also quite high and is 95,1…96,5%. The introduction of the water-retaining additive sodium carboxymethyl cellulose increases this figure to the level of 97...98,6% with the improvement of the rheological properties of the solution mortar.