Features of microstructure organization decorative composites

Abstract

The article proposes to use multi-level reinforcement of the structure of cement composites to improve and preserve the functional properties of decorative products. Strengthening the structure of the composite at all levels of its heterogeneities will provide the necessary resistance to various loads. The influence of discrete fibers of different lengths on the organization of the microstructure of dispersed systems was discussed earlier. The results of structural parameters of cement compositions presented in this paper are a continuation of previous studies.

To accurately describe the microstructure of the decorative composite and consider the relationships between its structural parameters, the method of experimental-statistical modeling was applied. Studies of 25 different compositions were carried out according to a 4-factor symmetrical plan. Processing of experimental data showed that the value of the water-cement ratio has a rather noticeable effect on the structural parameters of cement systems. A significant correlation between the indicators of cement systems has been identified. An analysis of the nature of damage to the surface of samples by cracks, internal surfaces of the section was carried out. It is confirmed that discrete fibers are able to actively participate in the processes of structural formation of building composites. Analysis of the data has shown that by introducing fiber, the uniformity of scattering of microdefects, internal stresses, etc. can be improved. The influence of composition factors on the structural parameters of the stone was evaluated using mathematical models. Visualization of local fields of properties in the coordinates of recipe factors made it possible to analyze the individual and synergistic effects of the influence of two groups of components on the formation of structural parameters of cement systems. It is shown that with rational ratios of composition factors, the structure of the capillary-porous space of the composite improves. The change in the number of microdefects in the structure of the material should affect the mechanical properties of the cement stone. It is planned to analyze the results of the study of the structural strength of the cement system.