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The paper presents the research results of the building material destruction due to hightemperature evaporation of heterogeneous solid-fuel combustion products. The aim of this work is to determine basic laws of destruction of non-metallic constructional materials (brick, concrete, granite) under the influence of high-temperature evaporation of heterogeneous solidfuel combustion products and develop a physical model of the process. A gas-dynamic setup is used to conduct the experiments, which allows to vary the stagnation pressure. The destruction rate of the material and the depth of resulting craters are chosen as characterization parameters. The dependence of the destruction rate and the crater depth on the stagnation pressure is compared with the similar data for steel. The stress values are obtained for the surface layer of the material. The proposed physical model of the destruction process of non-metallic constructional materials is based on excess of stresses of the material strength limit arising in its subsurface layer. The obtained results can be used to ensure the safety of special-purpose buildings at extreme thermal effects on the structural elements.

DESTRUCTION OF BUILDING MATERIALS (BRICK, CONCRETE, GRANITE) UNDER HIGH-TEMPERATURE EVAPORATION OF HETEROGENEOUS COMBUSTION PRODUCTS