RU2273610C1 - Method of the binding agent manufacture - Google Patents

Abstract

FIELD: building materials industry; methods of production of concretes and building mortar mixtures based on the slag-alkaline binding agent.

SUBSTANCE: the invention is pertaining to the building materials industry and may be used at production of concretes and building mortar mixtures based on the slag-alkaline binding agent. The technical result of the invention is simplification of the production process, expansion of the raw materials base of the slag-alkaline binding agents and an increase of their hydraulic activity. The method of production of the binding agent provides for a grinding of the slag with the additive increasing the hydraulic activity of the binding agent and with the following tempering by the liquid glass mixture. In the capacity of the indicated additive they use the silica-alumina additive - the siliceous zeolite-containing rock of Tatarsko-Shatrshannsky deposit or the waste of the liquid glass production out of the siliceous zeolite-containing rock of Tatarsko-Shatrshannsky deposit, or the crumbs of synthetic zeolite - the waste of production of " Salavatnefteorgsintez" Public Company at the components ratio of (in mass %): slag and the indicated additive - 1:(0.05-0.1) - 70-75, the liquid glass - 25-30.

EFFECT: the invention ensures simplification of the production process, expansion of the raw materials base for production of the slag-alkaline binding agents and an increase of their hydraulic activity.

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Description

The invention relates to the building materials industry and can be used in the manufacture of concrete and mortars based on a slag-alkali binder.

A known method of producing slag-alkali binders by grinding granular slag in mills of various types with subsequent mixing of the grinding product with alkali-containing solutions (Glukhovsky VD Gruntosilikatno virobi i design. Kiev, Budivelnik, 1967, p. 83).

The disadvantage of this method is the low hydraulic activity of binders from acidic slag during hardening in natural conditions and water.

A known method of producing a slag-alkali binder, which consists in the fact that in order to increase hydraulic activity, the slag is hydrophobized by grinding it together with the addition of polyorganyl hydrosiloxane followed by heat treatment at 80-150 ° C with heat shock with an isostatic exposure of 30-120 min and mixing with an alkali-containing solution ( A.S. USSR 814920, M ³ C 04 B 7/14, C 04 B 19/04, 03/23/1981). The disadvantage of this method is the complexity of the process.

A known method of producing a slag-alkali binder, which consists in the fact that in order to increase hydraulic activity, the slag melt is granulated by blowing it with dry air at a pressure of 2-8 atm, followed by cooling of the obtained granules to 200-300 ° C, and grinding is carried out by impact interaction oncoming flows of slag granules dispersed to 150-200 m / s with steam with a pressure of 6-8 ati (AS USSR 1057455, class C 04 V 7/14, BI No. 44, 11/30/83). The disadvantage of this method is the complexity of the process and high energy consumption.

Closest to the invention is a method for producing a binder, including grinding slag with an additive containing, wt.%: Alkaline lignosulfonate 2.5-33.3% and lime-neutralized one-off waste of chromium plating, copper plating and nickel plating 66.7-97.5 in the ratio additives and slag (0.03-0.1): 1, followed by mixing with a liquid glass solution (A.S. USSR 1357383 A, class C 04 V 7/153, BI No. 45, 12/07/08).

The disadvantages of this method is the complexity of the process associated with the need for evaporation of the waste of chromium plating, copper plating and nickel plating, neutralizing it with lime, the deficiency of the additive used.

The invention is aimed at simplifying the technology, expanding the raw material base of slag alkaline binders and increasing hydraulic activity through the use of aluminosilicate additives.

The result is achieved in that in the method for producing a binder, including grinding slag with an additive that increases the hydraulic activity of the binder, followed by mixing with a solution of liquid glass, according to the invention, an aluminosilicate additive is used as said additive - siliceous zeolite-containing rock of the Tatar-Shatrshansky deposit RT or production waste liquid glass from zeolite-containing siliceous rocks of the Tatar-Shatrshanskoye field of the Republic of Tatarstan, or crumb of synthetic zeolite - a waste from the production of Sa avatnefteorgsintez "at a ratio of components, wt.%:

Slag and specified additive with their ratio 1: (0.05-0.1) 70-75 Liquid glass 25-30

As the aluminosilicate component of the slag-alkali binder, acid granulated blast furnace and electrothermophosphoric slags corresponding to GOST 3476-74 "Domain and electrothermophosphoric granulated slag for cement production" can be used. For the manufacture of samples used blast furnace granular slag Magnitogorsk Metallurgical Plant. The chemical composition of the slag is presented in table 1.

Table 1 The content of compounds by weight,% Basicity module SiO ₂ Cao Al ₂ O ₃ MgO MnO Fe ₂ About ₃ TiO ₂ Na ₂ O K ₂ O P ₂ O ₅ SO ₃ 36.63 38.24 13.49 7.31 0.16 0.19 1.05 1,04 0.76 0,03 1.09 0.9

For mixing slag-alkali binders used liquid glass manufactured by GUP "Kamgesenergostroyprom" with a density of 1.3 g / cm ³ with a silicate module n = 1.5-2, corresponding to the requirements of GOST 13078-81 "Sodium silicate soluble". The chemical composition of water glass is presented in table 2.

table 2 SiO ₂ Al ₂ O ₃ TiO ₂ Fe ₂ O ₃ MnO Cao MgO Na ₂ O K ₂ O P ₂ O ₅ 28.05 0,055 0.01 0.014 0.01 0.01 0.01 9.92 0.01 <0.01

As aluminosilicate additives, we used zeolite-containing siliceous rock of the Tatar-Shatrshanskoye field RT or waste from the production of liquid glass from zeolite-containing siliceous rocks of the Tatar-Shatrshanskoye field RT, or crushed synthetic zeolite - a waste from JSC Salavatnefteorgsintez. The chemical composition of aluminosilicate additives is presented in table 3.

Table 3 No. SiO ₂ Al ₂ O ₃ Fe ₂ O ₃ FeO Cao MgO Na ₂ O K ₂ O TiO ₂ MnO F ₂ O ₅ SO ₃ one 59.5 4.7 1.4 0.04 15.3 0.8 0.06 1,0 0.2 0.01 0.06 0.05 2 54.09 5.85 1,63 0.27 12.54 0.79 9.84 0.95 0.31 0.01 0.08 <0.05 3 62.1 15.3 1,0 1,1 - - 11.2 - - 0.05 0.08 <0.05

1 - zeolite-containing siliceous rock of the Tatar-Shatrshanskoye field of the Republic of Tatarstan;

2 - liquid glass production waste from zeolite-containing siliceous rock of the Tatar-Shatrshanskoye field of the Republic of Tatarstan;

3 - crumb of synthetic NaX zeolite, molded with a binder in percentage terms, consists of 22-25% kaolin clay and 75-78% NaX zeolite, the chemical formula of which can be expressed in oxides as follows: Na ₂ OxAl ₂ O ₃ x2 .. .2.5 SiO ₂ .

Samples for testing are prepared as follows.

Pre-dried to a moisture content of not more than 1% blast furnace granulated slag of the Magnitogorsk Iron and Steel Works is subjected to joint grinding to a specific surface of 300-350 m ² / kg with aluminosilicate additive (siliceous zeolite-containing rock or crumb of synthetic zeolite, or the waste of liquid glass production from siliceous zeolite-bearing rocks) the ratio of additive and slag (0.05-0.1): 1. The ground mass is closed with an aqueous solution of liquid sodium glass with a density of 1.3 g / cm ³ with a silicate module n = 1.5-2. The ratio of components is, wt.%:

Sour blast furnace granulated slag:

Aluminosilicate additive (0.05-0.1): 1 70-75 Liquid glass 25-30

Samples are made from dough of normal density in accordance with the requirements of GOST 310.3-76. The strength of slag-alkali binder samples is determined after heat-moisture treatment according to the 3 + 6 + 3 mode at an isothermal heating temperature of 95 + 5 ° C and when hardened in water and normal conditions after 28 days. The test results of the proposed binders are presented in table 4.

The test results show that the proposed binder intensively hardens both in water and in normal humidity conditions, while control samples in water are destroyed, and their strength in normal humidity conditions is low.

The main products of hydration of slag-alkali binders, which determine their high performance characteristics (strength, frost resistance, etc.) are low-basic calcium hydrosilicates, alkaline and alkaline earth hydroaluminosilicates such as zeolites and mica etc. In this regard, the effect obtained is probably due to the fact that the introduction of additives similar in structure and composition to the main alkali-containing neoplasms of artificial slag-alkali stone contributes to the formation of water-resistant hardening products, which significantly increase the hydraulic activity of slag-alkali binders based on acid blast-furnace granular slags.

Thus, the technical efficiency of the invention lies in the production of a binder on acid granulated blast furnace slags with high hydraulic activity during hardening in natural conditions and in water.

Claims (1)

A method of producing a binder, including grinding slag with an additive that increases the hydraulic activity of the binder, followed by mixing with a liquid glass solution, characterized in that the aluminosilicate additive is used as the specified additive - siliceous zeolite-containing rock of the Tatar-Shatrshansky deposit RT or waste from the production of liquid glass from siliceous zeolite-containing rocks of the Tatar-Shatrshanskoye deposit of the Republic of Tatarstan, or crumb of synthetic zeolite - waste from the production of OAO Salavatnefteorgsintez with the ratio ii, wt.% Slag and specified additive with their ratio 1: (0.05-0.1) 70-75 Liquid glass 25-30