SU992468A1 - Raw mix for making heat- and sound-insulated material - Google Patents

Description

(5A RAW MATERIAL MIXTURES FOR THE MANUFACTURE OF HEAT AND SOUND INSULATION MATERIAL The invention relates to the field of building materials, and more specifically, to compositions for the manufacture of heat and sound insulating material that can be used for thermal insulation of pipelines, adhesiological research and structures. material l, including wt.%: liquid glass 47.6.8-86.9, ground sand 0.0 21, silicofluoride sodium 8.69 19.02, and polyethylorganosilicone k, k11 .9. Closest to the invention in l raw material and the mixture for the manufacture of heat and sound insulation material 2}, including, wt.%: liquid glass tSSO; quartz ground peso 3, sodium fluorosilicate 1-5; intumescent additive O, 5, and lime fluff O, 55-1, O. Disadvantages mixtures is that the heat insulating material of them has a large bulk density and high thermal conductivity. The purpose of the invention is to reduce the bulk mass and thermal conductivity The goal is achieved by the raw material mixture for the production of heat and sound insulating material A glass, silica-containing component with a specific surface of “000-7000 and additionally soap with the following ratio of components, weight. %: Liquid. Glass Silica-containing component with a specific surface of 000-7000 CMVr 5-38. Sodium silicofluoride9 18 Home soap 5-15 Moreover, the raw mix contains as a silica-containing component or one of the natural materials: quartzite, quartz sand, granite, andesite, diabase, or one of artificial materials: silica, glass-slag, tridymite, cristobalite.

The organic soap mixture contains in the form of a coagulated gel-like aqueous solution with a concentration of 10,100 g / l.

Commercial soap is used ready-made from soap factories in the form of a concentrated solution of 10-100 g / l, or it is specially prepared on site by dissolving the commercial product to obtain a gel-like composition of a given concentration.

The consumption of household soap varies in small limits (30-35 kg per 1 m). The amount of soap is due to the technological process of obtaining 0.8-1, which ensures the output of foam mixture within 1 m, regardless of the average density of the material (see Table 1).

The consumption limit of household soap (5-15) is determined by the bulk density of the material.

Thus, with a decrease in the volume mass, the percentage increases and at 100 kg / m is 15 and, conversely, with an increase in the volume mass, the percentage decreases to 5. A decrease in the foaming of bodies below the proposed limits does not allow obtaining the material of the required volume mass, t. e. leads to a violation of technological factors, and an increase in the percentage to a violation of the structure of the material, namely, the formation of cracks throughout the entire volume of products.

The concentration of the foaming agent (10100 g / l) determines the limits of the possible use of household soap in the production of cellular concrete based on liquid glass.

At a concentration below 10 g / l, the foam is obtained by a large-pore with thin shells, is rapidly destroyed, and it cannot be used for such purposes. Increasing the concentration of the solution above 100 g / l leads to the formation of a solid gel, which is tightly foamed.

An increase in the concentration of the soap solution from 10 to 100 g / l regularly changes the structure of the cells of the thermally insulating material - foam concrete: with increasing concentration the pore size decreases. The ability to change the structure of cellular foam is a very important factor in the production of porous materials.

The upper limit (63%) of the flow rate of liquid glass (130 kg to obtain cellular concrete with a bulk density of 100 kg / m is the minimum amount of binder needed to wrap all the soap bubbles in a volume of 1 m. A decrease in this amount leads to destruction of the mass (after drying rubble),

With an increase in the average density of the material, the consumption of liquid glass increases, but its percentage in the mixture decreases to 7 with an average density of 350 kg / m. Reducing the consumption of liquid glass below the specified limit leads to a sharp decrease in the strength of the material.

Sodium silicofluoride is a liquid glass hardener. Consumption.

sodium silicofluoride affects the mixture foam stability and the strength of the material. The upper limit is limited mainly by the bulk density of the material (100 pg / m). In order to ensure the durability of the foam mixture, it is necessary to ensure a quick setting in the shearer during the initial period. An increase in the amount of NajSiF contributes to a more rapid setting reaction, i.e. this limit ensures the production of cellular material with a mass mass of 100 kg / m. Reducing the consumption of NajSiF below 9 leads mainly to sedimentation of the foam mixture, and in particular cases (with immediate drying) - to a volume shrinkage. An increase in the consumption of Na2SiF leads to the formation of a dense, low-strength crust with a thickness of k-, 6 mm,

FIG. Figure 1 shows the effect of the specific surface area of the silica-containing component (ground sand) on the strength of foam concrete; in fig. 2 the influence of the nature of the silica-containing component.

As can be seen from the graph (Fig. 1), with the increase in the specific surface of ground sand to 4000-4500, the strength of the material (foam concrete) increases dramatically. A further increase in the land surface has a slight effect on increasing the strength of the samples with a bulk weight of 300-350 kg / m, but it appears when the bulk mass of the material decreases and especially at 100 kg / m. This is due to the fact that to reduce the bulk density, it is necessary to reduce the amount of the silica-containing component, but reducing it with a constant specific surface area of 4000 cm / g leads to a shortage of it in the raw mix, in addition, a decrease in the bulk density leads to an increase in the surface of the cells in the material .

Thus, the provision of a monolithic film in the system is achieved by increasing the specific surface (an increase in the fineness of the grinding increases the surface of the coating). The minimum specific surface area of 4000 cm / g at a flow rate not lower. An increase in the silica-containing component contributes to an increase in the bulk density and at 364 kg / m the optimum consumption of ground sand specific surface area of 4000 cm / g is within 38%. To obtain the material of the same volume & The nature of the silica-containing com-. Ponenta (quartzite, sand, granite, glass slabs, etc.) does not affect technological factors, but it does affect the physical and mechanical properties of the material. The properties of the used silica-containing component play a significant role in the properties of foam concrete, for example, the use of quartzite contributes to an increase in the acid resistance of the material, and tridimite contributes to an increase in thermal resistance. The effect of various components on the strength of foam concrete is shown in FIG. 2. As can be seen, the best results are achieved with the use of more active forms of silica: kremnecement, tridymite. The technology of preparation of the raw material mixture for the production of heat and sound of an ionic material is as follows. Water glass, silica-containing component and sodium silicofluoride are mixed in the mortar compartment of the foam concrete mixer for a minute until a homogeneous mixture is obtained. In parallel, whip the soapy solution until a rich foam is obtained. The raw material mixture is stirred for 3 minutes, after 4efo it is poured into molds. The raw material mixture hardens under natural conditions. In order to accelerate the hardening process, the raw material mixture is dried at or subjected to autoclave hardening at an overpressure of up to 12 atm. The compositions of the proposed raw mix are given in Table. 2. Table 2

Liquid glass

Snow-clad materials with specific surface area

Physical and technical indicators of heat and sound insulation material from

58

k7

the proposed raw mix, as well as from the known are given in .tabl. 3Table 3

From tab. 3 it follows that the heat and sound insulation material from the raw material mixture offered to it has a lower volumetric weight and thermal conductivity coefficient than the material from known mixtures.

Claims (3)

1. Raw mix for the production of heat and sound insulation material,. including liquid glass, silica-containing component and cold fluorescent sodium, characterized in that, in order to reduce the bulk density and thermal conductivity, it contains silica-containing component with a specific surface of 2 $ 1 | 000-7000 cMVr and in addition the following soap ratio of research institutes of components, weight. %: Liquid glass 7 ( Silica containing component with specific surface 000-7000 cm2 / g 5-38 Cream-sodium fluoride9-8 Soap household 5-15 2. A syrvic mixture according to claim 1, wherein it contains as a silica-containing component or one of natural materials: quartzite, quartz sand, granite, andesite, diabase, or one of artificial materials: silica, glass-slag, tridymite, cristobalite. 3. The syrya mixture according to claim 1, is in that it contains household soap in the form of a coagulated gel-like aqueous solution with a concentration of 10-100 g / l. Sources of information taken into account in the examination 1. Author's certificate H 706383, cl. WITH In 43/00, 1978. 2. USSR author's certificate number 443011, cl. C 04 V 19/04, 1972 (prototype). / X X woo 2000 3000 4000 50QO 6000 Free on the surface 7,000 Fig, 1 1. Creation Z.Tpugutiam 1К8арцеПыок t150 Sh250 2 300 3SO kg / m