SU1640132A1 - Raw mixture for producing heat insulating material - Google Patents

Abstract

The invention relates to the production of building materials and can be used in civil and industrial construction in the manufacture of light products and structures. In order to increase the strength and reduce the thermal conductivity coefficient, the raw mix for the production of heat insulating material contains, wt. the surface of which is modified with organic substances 65-75 and water the rest. Those insulating materials with a bulk weight of 400-500 kg / m3 have a compressive strength of 2.4-2.44 MPa, a tensile strength ™ when stretched to bend 0.71-1.05 MPa, a thermal conductivity coefficient of 0.06 0.08 W / mK. 3 tab. (Lda la

Description

The invention relates to the production of building materials and can be used in civil and industrial construction for the construction of light products and structures.

The aim of the invention is to increase the strength and decrease the thermal conductivity.

Gypsum-cement-pozzolanic mordant (FCP) is obtained by jointly grinding portland cement clinker, an acidic active mineral additive, and gypsum at a content of 20, 10j and 70 wt.%, Respectively.

As a mineral additive, ash of chemical composition is used, wt.%: Si02 58.94; A1g03 14.12; Ti02 1.26; 5.37J CaO 1.95; MgO 1.41, S03 0.59; K20 1.94; NagO 0.82, ppt rest.

 In the raw mix, waste products from winemaking filters are used, containing asbestos 15 wt.% And cellulose 85 wt.%, The surface of which is modified with organic substances.

Tannins, polysaccharides are sorbed on the surface of filters and also as a result of incomplete squeezing.

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these wine materials are pectins, residues of bentonites, yellow blood salt and proteins. According to the known technology, the permissible rate of sediment remaining on the filter is 100 g / m2. The weight of 1 m2 of waste of the winemaking filters production is 958 g. When cleaning the wine materials from protein opacities with the glueing materials, a sediment of the composition, mag -,%, precipitates; bentonites 92-98; yellow shelter for salt 1-3; proteins 0.1-0.2, tannins, pectins, polysaccharides 0.02-0.05.

The total sediment content and the percentage of sediment ingredients are listed in Table 1

With the setting and hardening of GPCs, the processes of hydration of the clinker component and the interaction of the hydration products with the active mineral additive proceed. In the initial period, hydrolysis and hydration of clinker grains receive predominant development. As a result of these primary processes, hydrosilicates, hydroaluminates and calcium hydroferrites are formed, and the hydrolysis of XCaOxItSiO and 2CaO-SiOa produces calcium oxide hydrate.

Organic acids and pectin substances sorbed on the surface of filter waste intensify hydration processes and the rate and degree of coagulation of the silicates and hydrosilicates of the clinker component. As a result of this, the rate of setting of the substance in a natural environment increases and the strength characteristics of the material obtained increase: 80% strength is achieved with natural hardening in 5-6 hours.

The developed surface of the filter waste, modified by organic substances (pectic substances organic acids), contributes to

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reinforcement of the material reinforcement, which leads to an improvement in the physicomechanical mechanisms of it.

Example. The HZ1GO and water are mixed for 1 min in a paddle mixer, after which the waste of the winemaking filters is added, previously crushed 3-5 cm long and 0.5-1.5 cm wide, and stirred for 2 min. The moisture content of the finished mixture is 8-10%.

The finished mixture is placed in metal forms, beams size 160x x40x40 mm, after a day the pacna-v forms are exchanged, the product is removed. After a 28-day natural hardening, the product is subjected to physico-mechanical tests.

The compositions of the raw mix are shown in table 2} the physico-mechanical properties of the products of these compositions are given in table 3.

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Claims (1)

25 claims Raw mix for the manufacture of insulating material, including gypsum-cement-pozzolanic in tartar and fiber additive, characterized in that, in order to increase strength and reduce thermal conductivity, it contains as a fibrous additive filter waste from cellulose-based and asbestos-based winemaking which are modified with organic substances, in the following ratio, wt.%: Gypsum cement pozzolanic idle 15-20 Filter waste Vinod eel her to og o production 65-75 WaterEverything Table 1 Table 2 Table3