МЕХАНІЗМ СТРУКТУРОУТВОРЕННЯ СПУЧЕНОГО ШАРУ ПІНОКОКСУ ПРИ ВПЛИВІ МІНЕРАЛЬНИХ РЕЧОВИН

Abstract

The studies have established the effect of fillers on the performance of the fireproof coating, the parameters of its swelling under the influence of temperature and inhibition, which makes it possible to influence this process. The effect of fillers on the coefficient of swelling of coatings based on inorganic and organic substances during thermal exposure was investigated. It isproved that it consists in the creation of a layer on the surface of the material that prevents heating to a critical temperature and decomposition of the material. Experimental studies have confirmed that the introduction of titanium oxide and aluminum hydroxide in the amount of 5% contributes to the achievement of the highest value of the coefficient of swelling - up to 47, which is 1.11 times higher than the value of the coefficient of swelling when aluminum hydroxide is introduced, titanium oxide and talc in the amount of 3.3%, 1.12 times higher than the value of the coefficient of swelling when titanium oxide and talc in the amount of 5% were added, and 1.08 times higher than the value of the coefficient of swelling when aluminum hydroxide and talc in the amount of 5% were added. The influence of fillers under the action of high-temperature heat flow on the change in the process of swelling of the fireproof coating was established and the mechanism of the kinetics of the fillers' action, characterized by a decrease in speed and mass loss, was determined. Thus, at 700 °C, the introduction of fillers leads to theformation of refractory compositions that prevent the burnout of the resulting foam coke, which increases the efficiency of fire protection of building structures. On the basis of physicochemical research methods, it is shown that the introduction of a mixture of titanium dioxide and aluminum hydroxide in the amount of 5% each into the composition of the organic-inorganic composition leads to an increase in the coefficient of swelling, orderliness of the structure of the foam coke layer, and an increase in its heat resistance due to the dehydration of mixed titanium-aluminum phosphates.