METHOD FOR PRODUCING HEAT INSULATING MATERIAL Russian patent published in 2017 - IPC C04B28/26 C04B14/38 C04B18/04 C04B111/20 C04B111/23 

FIELD: construction.

SUBSTANCE: in the method for producing a heat insulating material, consisting of mixing an inorganic natural material, liquid sodium glass, moulding the mass in the form of slabs or blocks, drying the finished product; quartz sand is used as the inorganic natural material; portland cement and the mixture of sewage sludge from sewage treatment plants of the industrial enterprises water treatment, a deactivated catalyst for cyclohexanol dehydrogenation being additionally introduced after their joint grinding in the presence of 1.5 to 2.0 wt % of carbamide, and basalt fiber, or basalt meal, or a mixture thereof are used as the additive; mixing the components is carried out in the paddle-type mixer, with their subsequent mixing with said liquid sodium glass in total for 6-8 min, moulding in the form of slabs with the size of 500×600×50 mm or blocks with the size of 300×600×200 mm, drying at the temperature of +10-35°C, wherein the mixture components are taken at the following ratio, wt %: liquid sodium glass 16.0-32.0, Portland cement 18.0-20.0, quartz sand 20.0-25.0, the mixture of sewage sludge and deactivated catalyst of cyclohexanol dehydrogenation 3.5-6.0, carbamide 1.5-2.0, basalt fiber, or basalt meal, or a mixture thereof 25.0-31.0.

EFFECT: increasing the compressive strength, decreasing the thermal conductivity factor, imparting to the material anticorrosive properties, namely resistance to the impact of acid solutions reducing the production power consumption.

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