RU2306293C1 - Clay-phosphate material - Google Patents

Abstract

FIELD: building materials industry.

SUBSTANCE: claimed material contains (mass %): Cambrian blue clay 56-57; iron-containing waste from metallurgical industry based on Fe(II) with N 008 screening residue of 5-7 % 10-11; barium sulfate with N 008 screening residue of 2-5 % 14-15; and balance: phosphoric acid with density of 1.24-1.25 %.

EFFECT: material of increased strength and electroconductivity.

1 ex, 1 tbl

Description

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

Known clay-phosphate materials based on clays, loams, phosphoric acid and additives - d-metal oxides (Svatovskaya LB, Smirnova TV, Latutova MN and others. Cementing and non-calcined materials based on natural aluminosilicates. - L .: Stroyizdat, magazine "Cement" No. 11, 1989). 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 phosphate materials selected as analogs harden in air and have low strength after water saturation.

The closest in technical essence and the achieved result to the claimed technical solution is selected for the prototype clay phosphate material based on loam 71-74 wt.%, Iron-containing waste of metallurgical production with a residue on sieve No. 008 5-7% containing Fe (II) 7 oxide -11 wt.%, And phosphoric acid with a density of 1.24-1.25 g / cm ³ - the rest (Patent RU No. 2148563, С04В 28/34, 05/10/2000).

The disadvantage of this material is the low strength after water saturation due to the low electrical conductivity of the phosphate paste.

The problem to which the invention is directed, is to increase the strength of the aluminophosphate material by increasing the number of ionic phases and increasing the electrical conductivity of the aluminophosphate paste.

The problem in the proposed solution is achieved by the fact that the clay-phosphate material containing clay, iron-containing waste of metallurgical production based on Fe (II) oxide with a residue on sieve No. 008 of 5-7% and phosphoric acid with a density of 1.24-1.25 g / cm ³ , contains Cambrian blue clay and additionally barium sulfate with a sieve residue No. 008 of 2-5% with the following ratios of components, wt.%:

clay cambrian blue 56 ... 57 specified iron waste 10 ... 11 specified barium sulfate 14 ... 15 phosphoric acid with a density of 1.24 ... 1.25 g / cm ³ rest

A new, compared with the prototype, is the use of barium sulfate and Cambrian blue clay, which leads to an increase in the electrical conductivity of the phosphate paste due to an increase in the number of ionic phases and an increase in strength after water saturation of the phosphate material.

Concrete example

A mixture consisting of Cambrian blue clay, iron-containing waste of metallurgical production, which is an oxide of Fe (II), and barium sulfate, is mixed and mixed with phosphoric acid with a density of 1.24 ... 1.25 g / cm ³ . The following materials are used: Cambrian blue semi-acidic clay, low dispersed, medium plasticity, 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), barium sulfate with a sieve residue No. 008 of 2-5% (TU 3158-75).

The use of barium sulfate makes it possible to increase the electrical conductivity of the clay phosphate paste and the strength after water saturation of the clay phosphate material.

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

An analysis of the table shows that an increase in the electrical conductivity of the clay phosphate paste leads to an increase in strength after water saturation of the clay phosphate hardened material. The compressive strength of the clay phosphate material was determined after a two-day water saturation of the samples according to GOST 10180-90. The conductivity of the clay phosphate paste, S / m, was measured using a KEL-IM conductivity meter at certain intervals.

Table Number p.p. Composition, wt.% Phosphoric acid, density 1.24 ... 1.25 g / cm ³ Electrical conductivity
Cm / m Strength, in compression, MPa Cambrian clay Iron waste Barium Sulphate one 2 3 four 5 6 7 one 56 eleven fifteen eighteen 0.90 10.5 2 57 10 fourteen 19 0.87 10.0 3 58 eleven 13 eighteen 0.68 6.5 four 56 10 16 eighteen 0.85 9,4 5 57 eleven fourteen eighteen 0.88 10,2 6 55 10 fifteen 19 0.80 8.8 7 55 12 13 19 0.70 6.8 8 55 9 16 19 0.84 9.0 9 71 eleven - eighteen 0.56 4,5

Claims (1)

Clay phosphate material containing clay, iron-containing metallurgical waste based on Fe (II) oxide with a residue on sieve No. 008 of 5-7% and phosphoric acid with a density of 1.24-1.25 g / cm ³ , characterized in that it contains clay Cambrian blue and optionally barium sulfate with a sieve residue No. 008 of 2-5% with the following ratios of components, wt.%: clay cambrian blue 56 ... 57 specified iron waste 10 ... 11 specified barium sulfate 14 ... 15 phosphoric acid with a density of 1.24 ... 1.25 g / cm ³ rest