The paper presents data on the protection of timber from combustion and burning using the protective coatings based on alkali aluminosilicates. The results of study suggested to formulate a mix design of the alkaline aluminosilicate bond, choose fillers and to determine rates of mass loss of timber at burning and degree to which the samples under study have been deteriorated. The coated samples of wood have a minimum rate of burning – 0.002-0.0024 kg/s·m2, which is 1.3-1.6 times less than the permissible value (0.0032 kg/s·m2) and 1.5-2.3 less than that of the analogue (a commercial product "Siofarb”). In combustibility and burning behavior, the formulated coatings can be classified as hardly combustible and non- burnable materials.
A new thermal insulating material was developed on the basis of a geocement, formulated as Na2OAl2O36SiO220H2O. Ground limestone and aluminosilicate pellets were used as fillers for its production (composition: geocement 64.29 wt. [%]; fillers 35.71 wt. [%]). This material, which is applied having a thickness of 3.0-4.5 mm, swells when it is exposed to an external heat flow of 1273 K average temperature. Swelling is due to the matrix phases and filler dehydration, which include heulandite, ussingite, sodium zeolite and other phases. As a result, a finely porous glassy aluminosilicate frame of jadeite-albite composition is formed, which is characterized by low thermal conductivity (0.09-0.175 Wm-1K-1). The developed material can be used to protect and to insulate wooden, metal and concrete surfaces from an one-sided heat source.The paper is dedicated to the great scientist of the XXI century in the field of alkali-activated cements and materials based on them, Pavlo Kryvenko, in honor of his 75thbirthday anniversary.
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