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PHYSICO-CHEMICAL REGULARITIES OF FORMATION STRUCTURES OF NON-FIRED GYPSUM MODIFIED STONE
Abstract
Gypsum-based materials and products currently deserve special attention from specialists in many industries. They are distinguished by high environmental friendliness, manufacturability and safety. The construction industry is showing additional interest in their increased comfort, reduced sound insulation and thermal insulation. Obtaining crystallization structures directly from gypsum dihydrate using a non-hydration hardening scheme competes with many modern technological approaches. In the production of non-firing gypsum binders, CO2 and other toxic substances are not released into the environment, energy costs are sharply reduced. The control of structure formation of unfired gypsum structures is based on the principles of condensation hardening of compacted powders. As basic analytical regularities, the equations of Thompson (Kelvin), A.N. Shchukarev, A.F. Polak et al. Regulation of dispersion of calcium sulfate dihydrate powders and directed control of structural characteristics is achieved by mathematical modeling of the internal structure of the gypsum matrix. With the introduction of additional finely dispersed aluminumcontaining fillers into the gypsum matrix, an increase in the density of the structure and a significant increase in strength are observed. The gypsum structure with dense packing of grains is characterized by an increase in the area of contacts between crystallite structures. This is reflected in the physical and mechanical characteristics of the modified matrix structure of the composite. The synthesis of non-firing composites with previously unattainable properties is due to the targeted impact on the structure formation of non-hydration systems. An optimal combination of properties is achieved in accordance with the purpose and scope of non-firing materials
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References8
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