RU2286967C1 - Clay-phosphate material - Google Patents

Abstract

FIELD: manufacture of building materials.

SUBSTANCE: novel clay-phosphate material comprising loamy soil, iron-containing metallurgical waste with residue on screen no. 008, which contains 7-11 wt % of ferrous oxide and orthophosphoric acid with density 1.24-1.25 g/cc, additionally contains wood sawdust, so that material is finally composed of, wt %: loamy soil 60-63, metallurgical waste 7-11, wood sawdust 10-15, and orthophosphoric acid - the rest. Invention can be used in manufacture of construction blocks.

EFFECT: reduced heat conductivity at the same waterproofness.

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Description

The invention relates to the field of building materials and can be used in the manufacture of building blocks.

Known materials based on clay, loam, phosphoric acid and additives - d-metal oxides (Latutova MN, Svatovskaya LB, Chibisov NP and others. Physical and chemical features of hardening of GLINFs and ALUMPHs. - L. : Stroyizdat, "Cement", 1990, No. 10). These known aluminophosphate materials harden in air and are water resistant.

Closest to the technical nature of the claimed technical solution is selected for the prototype aluminophosphate material of the following composition (wt.%):

loam 71-74 iron waste metallurgical production with residue on sieve No. 008, containing Fe (II) oxide 7-11 wt.% 5-7 orthophosphoric acid density 1.24-1.25 g / cm ³ rest

(Patent RU No. 2148563, С 04 В 28/34, 05/10/2000).

The disadvantage of this aluminophosphate material is not sufficiently low thermal conductivity.

The objective of the invention is the creation of a new clay phosphate material with reduced thermal conductivity while maintaining water resistance.

The solution to this problem is achieved by the fact that the clay-phosphate material containing loam, iron-containing metallurgical waste with a residue on sieve No. 008, containing Fe (II) oxide 7-11 wt.%, Phosphoric acid, with a density of 1.24 - 1.25 g / cm ³ additionally contains sawdust, in the following ratio of components, wt.%:

loam 60-63 iron waste metallurgical production with residue on sieve No. 008, containing Fe (II) oxide 7-11 wt.% 4-8 sawdust 10-15 phosphoric acid density 1.24-1.25 g / cm rest

New in comparison with the prototype to reduce the thermal conductivity of the material is the use of wood sawdust.

Material production

A mixture consisting of loam, iron-containing waste from metallurgical production with a residue on a No. 008 sieve of 5-7%, containing Fe (II) oxide and wood sawdust, is mixed and mixed with phosphoric acid with a density of 1.24-1.25 g / cm ³ . The following materials are used: iron-containing waste of the following basic composition, wt.%: FeO - 96; CuO-0.1; Al ₂ O ₃ - 0.4; Mo ₃ O ₄ - 0.1; NiO - 0.2; SiO ₂ 2.0; Cr ₂ O ₃ - 0.3; C - 0.3; loam; phosphoric acid with a density of 1.24-1.25 g / cm ³ .

After hardening in air, a water-resistant clay phosphate material with reduced thermal conductivity is obtained, which can be used in construction.

The use of wood sawdust allows to reduce the thermal conductivity of the material by increasing the density and porous structure with the predominance of small pores.

To determine the modulus of fineness, a small fraction of iron-containing waste from metallurgical production with a particle size of less than 5 mm was screened on a standard set of sieves according to GOST 8735-88.

Strength of materials is determined in accordance with GOST 10180.

The coefficient of thermal conductivity is determined according to GOST 7076-87.

Examples of compositions and test results are presented in the table.

The composition of the material, wt.% Compressive strength, MPa, water saturation Heat conductivity coefficient, λ, W / (m / K) Loam 60
Iron-containing waste of metallurgical production with a residue on sieve No. 008 containing Fe (II) oxide (7-11 wt.%) 4
Sawdust 10
Orthophosphoric acid
density of 1.24-1.25 g / cm ^{3 the} rest 9.3 0.33 Loam 61
Iron-containing waste of metallurgical production with a residue on sieve No. 008 containing Fe (II) oxide (7-11 wt.%) 6
Sawdust 13
Orthophosphoric acid
density of 1.24-1.25 g / cm ^{3 the} rest 9.3 0.31 Loam 63
Iron-containing waste of metallurgical production with a residue on sieve No. 008 containing Fe (II) oxide (7-11 wt.%) 8
Sawdust 15
Orthophosphoric acid
density of 1.24-1.25 g / cm ^{3 the} rest 9.2 0.30 Loam 71-74
Iron-containing waste of metallurgical production with a residue on sieve No. 008, containing Fe (II) oxide (7-11 wt.%) 5-7
Orthophosphoric acid
density of 1.24-1.25 g / cm ^{3 the} rest 9.0 0.4

Analysis of the table shows that the additional use of wood sawdust makes it possible to reduce the thermal conductivity of the phosphate material in comparison with the prototype.

Claims (1)

Clay-phosphate material containing loam, iron-containing metallurgical waste with a residue on sieve No. 008, containing Fe (II) oxide 7-11 wt.%, Phosphoric acid with a density of 1.24-1.25 g / cm ³ , characterized in that it contains wood sawdust, in the following ratio of components, wt.%: Loam 60-63 Iron waste metallurgical production with residue on sieve No. 008, containing Fe (II) oxide 7-11 wt.% 4-8 Sawdust 10-15 Orthophosphoric acid density 1.24-1.25 g / cm ³ Rest