Increase Water Resistance Decorative Coatings on the Basis of Calcareous Dry Building Mixtures

Abstract

Data about regularities of influence of filler, based on the calcium hydrosilicate, on properties of limy dry construction mixes and coverings in their basis are given. Higher water resistance of limy coverings with application of containing silicate filler is established.The conducted researches established efficiency of application in a compounding of limy dry construction mixes (DCM) the nanostructuring additives based on aluminosilicates [1, 2]. For regulation of structure and properties of limy dry construction mixes (DCM), intended for restoration of historical building, and also finishing of again constructed facilities, we offered to enter into their compounding an additive based on the synthesized hydrosilicates (HSC) [3, 4].Hydrosilicates of calcium (HSC) are received by synthesis from liquid sodium glass in the presence of calcium chloride CaCl2 with the subsequent drying of sediment at a temperature 105-300°C and its crushing. Studying of material composition of the filler, made by methods of the X-ray phase analysis (RFA) and infrared (IK) spectroscopy, and also structure on the electronic scanning microscope of PhenomTM G2 pro showed the existence in synthesizable material the calcium silicates of various basicity.The conducted researches show that the filler based on HSC possesses hydraulic activity. The activity of filler, defined according to a technique [5], makes 195-250 mg/g depending on the synthesis mode.At developing of compounding of DCM the modifying additives: softeners, redispersion powders were applied. As the plasticizing additives the Kratasol, Hidetal P-4, S-3, SP-3, MelmentR F15G and MelfluxR 1641F were entered into a compounding. Additives of “Kratasol” series represent salts of naphthalenesulfoacids with the high maintenance of high-molecular fractions, an additive Hidetal of P-4 – hyper softener based on polikarboxylate.