SU996399A1 - Raw mix for making heat insulation - Google Patents

Description

The invention relates to building materials and is intended for thermal protection of building structures and buildings.

The known raw material mixture 1 for the manufacture of thermal insulation, including perlite sand, soluble glass, orthophosphoric acid with a content of 30% sodium siliconate and water, with the following content of components, wt.%

30-65

Perlite sand 30 - 35 Soluble glass 2.5-10 Phosphoric acid 1 - 10 Sodium alkylsiliconate 5-30 Water (in excess of 100%) The disadvantage of this raw mix is the low strength of the products.

The closest to the invention according to the technical essence and the achieved result is the raw material mixture for the manufacture of thermal insulation, including expanded aepiymkuyt, soluble glass, silicate wastes of petrochemical synthesis, sodium alkylsiliconate and water at the same ratio of components, wt.%:

Vermiculite48 - 68

Liquid glass23 - 37

Water7-9

Silicate waste Petrochemical synthesis1-3

1-3 sodium dilaciliconate. The disadvantage of this raw mixture for the manufacture of thermal insulation

10 is a high bulk density product.

The purpose of the invention is to reduce the bulk density of products.

The goal is achieved

15 in that the raw material mixture for the manufacture of thermal insulation, including expanded vercculite, soluble glass, sodium alkyl silicate and an additive, contains as an additive

20 perlite in the following ratio, wt.%:

Expanded vermiculite 39 - 59 Soluble glass 29 - 39 Sodium alkylsiliconate 1 - 4

25 Perlite11-18

Claims (2)

Perlite (volcanic glass) and. Sodium alkylsiliconate contains active silica, which under conditions of thermal heating during hot pressing actively interacts with soluble glass to form a strong skeleton on vermiculite plates. The introduction of perlite over 18% leads to loosening of the material and a decrease in strength. Reducing the perlite content below the specified limit does not reduce the bulk density. Example 1. To 59% vermiculum add 11% pearlite, 29% soluble glass and 1% sodium alkyl silicate, mix the mixture and perform hot pressing at 200 for 0, 25 hours per 1 cm of the thickness of the product. Example 2. 17% of perlite is added to 46% vermiculite. Next, add 35% soluble glass and 2% sodium alkyl silicate, and mix. hot pressing is done at 200 for 0.25 h per 1 cm of thickness of the product. Example H. 18% of perlite, 39% of soluble glass and 4% of sodium alkyl silicate are added to 39% vermiculite, the mixture is stirred and hot pressed at 200 ° for 0.25 h per 1 cm of product thickness. The properties of thermal insulation made from the proposed raw mix and known are given in the table. Continuation of the table The addition of perlite (volcanic glass), which contains active silica, under heating conditions, during hot pressing, actively interacts with soluble glass and forms a strong skeleton with a small bulk density on vermiculite plates. The raw material mixture for the manufacture of thermal insulation, including expanded vermiculite, soluble glass, sodium alkylsiliconate and an additive, characterized in that, in order to reduce the bulk weight of products, it contains perlite in the following ratio of components, wt% : Expanded vermiculite 39-59 Soluble glass 29 - 39 Sodium alkyl silicate 1-4 Perlite 11 - 18 Sources of information taken into account during the examination 1. USSR author's certificate No. 351804, cl. From 04 To 19/04, 1971. 2. USSR author's certificate number 867911, cl. From 04 to 43/00, 1979.