Modified Clay Gypsum Materials for Facade Systems: Fid-Bau Portal

Modified Clay Gypsum Materials for Facade Systems

Ushakov, Andrey / Pilipenko, Anton / Kaddo, Maria / Asamatdinov, Marat

Existing trends in the development of technology for gypsum-containing materials include expansion of their application possibilities in systems of façade coatings, the usage of by-products of other industries and local gypsum-containing raw materials. Considering the low durability of gypsum materials in wet operating conditions, system solutions are being developed based on the use of various methods of gypsum modification, including the usage of polymers. The purpose of the research described in the article was to develop a method for selecting the composition of modified clay-gypsum binder, optimizing its compositions and assessing the properties of the materials obtained under conditions of high humidity. The experiment to assess the influence of the composition of the modified clay-gypsum binder on its properties was carried out according to the general methodology of planning the experiment and analytical optimization of its results. The research results showed that the compressive strength of the clay gypsum samples with 15% modified melamine–formaldehyde resin in-creases by 15% after 80 days of storage in air. Products made of modified clay-gypsum have a fairly high frost resistance of 75 cycles and a softening coefficient of 0.95. The vapor permeability of the material is 0.088 mg/(m $\cdot$ \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\cdot$$\end{document}h $\cdot$ \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\cdot$$\end{document}Pa), which determines the favourable moisture regime of the load-bearing walls with lining with this material.