SU885239A1 - Raw mixture for making heat-insulation material - Google Patents

Description

(54) RAW MATERIAL MIXTURES FOR THE MANUFACTURE OF THERMAL INSULATION.

one

The invention relates to compositions of masses for the manufacture of thermal insulation and can be used in the building materials industry.

The known raw material mixture tl3 for the manufacture of thermal insulation, including, by weight,%: perlite fraction less than 0.14 mm, 36.7-45.68, asbestos 28.438, 0, portland cement 28.4-38.0. Thermal insulating decorative plates with a bulk weight of 850 kg / m and strength of 59-75 kgf / cm are obtained from this mixture after heat treatment in steaming chambers.

The disadvantage of the raw mix is the high volume weight of the products and their increased water absorption, amounting to 60-70%.

Closest to the proposed technical essence and the achieved result is the raw material mixture 21 for the manufacture of thermal insulation, - containing, wt.%: Bulk expanded perlitic sand

weighing 60 kg / m 43, asbestos 16, Portland cement 41. The mixture is used for the manufacture of thermal insulation products under production conditions that have the following physicomechanical properties: bulk weight 350 kg / m bending strength 2.5 kgf / cm, thermal conductivity co-deficit 0.073 0.073 kkap / m h hail.

The disadvantages of this mixture are low strength, low temperature of use of products, not exceeding 55cPc, as well as high water absorption, causing low water resistance.

The purpose of the invention is to increase the strength, temperature of use and water resistance of thermal insulation.

Claims (1)

The goal is achieved by the fact that the raw material mixture for the manufacture of thermal insulation, including expanded perlite sand, asbestos and portland cement, contains expanded perlite sand with bulk bulk mass of 60–80 kg / m3, hydrophobized polyethyl silane siloxane liquid, sodium silicate and a natric layer, a natric pattern, and a sub-natur. -1.5 weight.h. by weight of perlite in the following ratio of wt.%: Expanded perlite sand bulk density 60-80 kg / m hydrophobic polyethylene hydrosiloxane liquid, sodium ethyl silicate or sodium methyl silicate in the amount of 1-1.5, 1.5 weight.h. from the mass of perlite 50-55 Asbestos .20-30 Portland cement 15-20 Example. Raw mixtures are prepared for the manufacture of thermal insulation, including, wt%: expanded hydrophobic perlite sand with a bulk weight of 60-80 kg / m 50-55, asbestos brand PZ-60 20-30, portland cement 400-500 15-20. Preliminary hydrophobic perlite sand is carried out with polyethylsiloxane liquid GKZH-94 according to GOST 10831-64 at a flow rate of 1-1.5 weight by weight of perlite. Application of water repellent1; it is shown1) to be sprayed on perlite produced by pulverization, and sodium GKZh-1 sodium silicate can be used as a water repellent according to MRTU-6-02-271-63 and methyl sodium silicate GKZH-1 according to MRTU 6-02 271-63 . Thermal insulation material obtained by the well-known technology from the raw material mixture is characterized by the following physicotechnical properties (depending on the mixture composition): bulk weight 300-700 kg / m compressive strength 6-25 kgf / m, bending of 3.5-15 kgf / cm, thermal conductivity coefficient of 0.0750, 159 kcal / m h degree, water absorption coefficient not higher than 5%, the application temperature is from -100 to +1000 0. Compared with the well-known heat insulation material made of the sold mixture has been increased by 60% when comparing brands of 350 kg / m to By my weight, the application temperature is increased to 1000 ° C against, 4, the water absorption coefficient is reduced by about 5%. The proposed raw material mixture expands the field of application of heat insulators manufactured on its basis in the external environment, regardless of the humidity conditions when exposed to precipitation in the form of rain and snow and low temperatures, which allows the raw mixture to be used as a starting material for plastering the external surfaces of critical structures. , as well as facing panel structures and partitions. Thermal insulation products from the proposed raw material mixture have high architectural properties. Under the production conditions of the Leninsky Kuzn plant, the raw material mixture was applied with a positive effect when constructing partitions in river and sea vessels with their lining with asboperlitto cement slabs 1.6 «4 m in size and 12 mm thick. The raw material mixture for the manufacture of thermal insulation, including expanded perlite sand, asbestos and portland cement, characterized in that, in order to increase the strength, temperature of use and water resistance, thermal insulation, it contains expanded perlite sand of bulk bulk weight 60-80 kg / m, hydrophobized with polyethylsiloxane liquid, sodium ethylsiliconate or sodium methylsiliconate in the amount of 1-1.5 parts by weight, by weight of perlite in the following ratio of components, wt.%: Expanded perlite juice bulk bulk weight 60-80 kg / m hydrophobic polyethylene hydrosiloxane liquid, sodium ethyl silicate or sodium methyl silicate in the amount of 11, 5 weight.h. from the mass of perlite 50-55 Asbestos 20-30 Portland Cement 15-20 5 Sources of information taken into account during the examination I. USSR author's certificate No. 58П27, cl. From 04 To 43/04, 1975. 8852396 2, Zhukov D.L. Fundamentals of the theory and technology of drying heat-insulating products. Stroyizdat, M., 1974, p. 8, 38-44.