RU2378221C1 - Clay-phosphate material - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention is related to the field of construction materials. Clay-phosphate material, which contains clay, iron-containing waste of metallurgical production on the basis of Fe(II) oxide with residue on sieve No. 008 5-7% and orthophosphoric acid with density of 1.25 g/cm³, contains blue Cambrian clay and additionally waste of sand from treatment and sandblast devices with residue on sieve No. 008 5…7% with the following composition, wt %: FeO - 7.0; Fe₂O₃ - 44.0; Al₂O₃ - 4.5; MgO - 6.0; CaO - 4.3; SiO₂ - 30.0; Cu - 0.6; Zn - 3.5; Pb - 0.1 at the following ratio of components, wt %: blue Cambrian clay - 57- 58, specified iron-containing waste - 11- 12, specified sand waste - 12- 13, orthophosphoric acid with density of 1.25 g/cm³ - the rest.

EFFECT: increased frost resistance of material.

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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 clay phosphate materials based on clay, loam, phosphoric acid and additives - oxides of d-metals. (Svatovskaya L.B., Smirnova T.V., Latutova M.N. et al. Cementing and non-baking materials based on natural aluminosilicates. - L.: Stroyizdat, “Cement” magazine, No. 11, 1989. P.7- 8). The process of obtaining materials based on a natural highly dispersed product represented by clay minerals can take place according to the scheme of acid reactions - on the acid and active centers of these minerals. This process can be catalyzed by substances acting on the principle of redox catalysts. As activating additives, you can use technogenic products containing d ^6-10 elements, as well as iron-containing products.

These known aluminophosphate materials selected as analogues harden in air and are water resistant.

The disadvantage of these materials is low frost resistance due to the formation of a significant amount of aluminum hydrogen phosphates.

Closest to the technical nature of the claimed technical solution is selected as a prototype clay phosphate material of the following composition, wt.%: Blue Cambrian clay - 56 ... 57; iron-containing waste of metallurgical production with a sieve residue No. 008 of 5-7% - 9 ... 11; open-hearth dust with a residue on sieve No. 008 of 2-5% - 15 ... 16 and phosphoric acid with a density of 1.24-1.25 g / cm ³ - the rest, (Patent RU No. 2232147, С04В 28/34, 07/10/2004).

The disadvantage of these materials is the low frost resistance of the obtained phosphate materials.

The problem to which the invention is directed, is to increase the frost resistance of materials based on phosphoric acid and the use of waste sand treatment and sandblasting devices in metallurgy due to the formation of sparingly soluble basic aluminum phosphates.

The technical result is achieved by the fact that the clay-phosphate material containing blue Cambrian clay, iron-containing waste of metallurgical production based on Fe (II) oxide with a residue on sieve No. 008 5 ... 7% and phosphoric acid with a density of 1.25 g / cm ³ additionally contains waste sand treatment and sandblasting devices with a sieve residue No. 008 of 5 ... 7% of the following composition, wt.%: FeO - 7.0; Fe ₂ O ₃ - 44.0; Al ₂ O ₃ - 4.5; MgO - 6.0; CaO - 4.3; SiO ₂ - 30.0; Cu - 0.6; Zn - 3.5; Pb - 0.1, with the following ratios of components, wt.%:

Clay blue cambrian 57 ... 58 Specified Iron Waste 11 ... 12 Specified Sand Waste 12 ... 13 Orthophosphoric acid, density 1.25 g / cm ³ rest

New in comparison with the prototype, is the use of waste sand cleaning and sandblasting devices with a residue on sieve No. 008 5 ... 7% instead of sand, which leads to the formation of sparingly soluble basic aluminum phosphates, contributing to an increase in frost resistance of the material.

EXAMPLE OF SPECIFIC PERFORMANCE

A mixture consisting of Cambrian clay, iron-containing metallurgical waste, consisting of iron (II) oxides and sand from cleaning and sandblasting devices with a residue on sieve No. 008 5 ... 7%, is mixed and sealed with orthophosphoric acid with a density of 1.25 g / cm ³ . The following materials are used: semi-acidic blue Cambrian clay, low dispersed, medium ductility, bulk density - 1450 kg / m ³ ; 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; phosphoric acid (GOST 65-52-80), waste sand from sandblasting and sandblasting devices with a sieve residue No. 008 of 5 ... 7% of the following composition, wt.%: FeO - 7.0; Fe ₂ O ₃ - 44.0; Al ₂ O ₃ - 4.5; MgO - 6.0; CaO - 4.3; SiO ₂ - 30.0; Cu - 0.6; Zn - 3.5; Pb - 0.1. The use of waste sand treatment and sandblasting devices allows you to get after hardening in air, frost-resistant material that can be used in construction. Frost resistance was determined according to GOST 7025-91.

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

Table Number p.p. Composition, wt.% Phosphoric acid, density
1.25 g / cm ³ Strength after freezing MPa, cycles Cambrian clay Iron waste Sand waste 10 thirty one 2 3 four 5 6 7 one 70 12 - Rest - - 2 70 - 12 Rest - - 3 57 12 13 Rest 8.0 12.0 four 58 eleven 12 Rest 7.5 11.5 5 59 eleven eleven Rest 3,5 7.5 6 56 12 fourteen Rest 4.0 9.0

Analysis of the table shows that the use of sand waste treatment and sandblasting devices instead of sand can increase the frost resistance of the material.

Claims (1)

Clinophosphate material containing blue Cambrian clay, iron-containing waste of metallurgical production based on Fe (II) oxide with a residue on sieve No. 008 5-7% and phosphoric acid with a density of 1.25 g / cm ³ , characterized in that it further comprises waste sand and sandblasting devices with a residue on sieve No. 008 5 - 7% of the composition, wt.%: FeO - 7.0; Fe ₂ O ₃ - 44.0; Al ₂ O ₃ - 4.5; MgO - 6.0; CaO - 4.3; SiO ₂ - 30.0; Cu - 0.6; Zn - 3.5; Pb - 0.1 in the following ratios of components, wt.%:
Clay blue cambrian 57-58 Specified Iron Waste 11-12 Specified Sand Waste 12-13 Orthophosphoric acid density 1.25 g / cm ³ Rest