Composites for Bricklaying and Decorative Elements

The object of the study is the building materials of a building that is subject to restoration. Laboratory studies were carried out, during which the physical and mechanical properties of the studied materials were determined: density, compressive strength, humidity. X-ray phase analysis and scanning electron microscopy give an idea of the chemical composition and microstructure of materials. During the work, the compositions of restoration compositions for bricks and decorative concrete elements (balusters, cornices) were developed. In the course of laboratory studies, a composite for the restoration of brickwork and a composition of fiber concrete for the restoration of architectural elements of a building with the addition of asbestos fibers was obtained, which has the following characteristics: dry matter density of 1.83 g/cm3, compressive strength of 45.2 MPa, elastic modulus of 0.95 MPa, thermal conductivity of 0.65 W/(m \(\cdot\) C), frost resistance F75. Asbestos fibers are the optimal reinforcing element of fiber concrete, composites with the addition of chrysotile have a strong energy bond along the fibers, which provides greater tensile strength. The resulting material is resistant to chemical influences, since chrysotile, unlike many other fillers, does not dissolve in an alkaline environment. Surfactant P-17 in the compositions of the obtained composites contributes to the optimization of their physical, mechanical and operational properties, and also meets modern requirements for environmental safety.