RU1813084C - Method of manufacture of concrete products - Google Patents

Abstract

The invention relates to the building materials industry and can be used for the manufacture of concrete products using granulated and ground blast furnace slag. The essence of the proposed method is as follows. The estimated amount of crushed and granulated blast furnace slag is loaded into the mixer in accordance with 1: (2.5 ... 3). soda ash or any other activating additives are added and thoroughly mixed, water is added at the rate of obtaining a mass with a moisture content of 5 ... 7.5%. The mass is loaded into a press chamber and pressed at a pressure of 50 ... 60 MPa. The resulting products are subjected to heat treatment - steaming. The duration of pressing is 7 s. product strength 23.2-34 MPa. 6 tab.

Description

The described invention relates to the building materials industry, in particular, to methods for the production of concrete wall blocks on alkaline alkaline in baking and can be used in the manufacture of concrete products using granulated and crushed blast furnace slag, which, after forming the mixture, are of sufficient strength.

The purpose of the invention is to reduce production time and energy costs.

This is achieved in that the crushed and granulated blast furnace slag is mixed in a ratio of 1: (2.5-3), added soda ash or water glass in an amount of 1-2%, and the mass is pressed at a pressure of 50-60 MPa and humidity of the pressed mass 5-7.5%,

For pressing, a mass with a moisture content of 5-7.5% is used, pressing is carried out under a pressure of 50-60 MPa. crushed and granulated slags are taken in a ratio of 1. (2.5-3), activating additives are taken in an amount of 1-2%.

The essence of the proposed method is as follows.

The calculated amount of crushed and granulated blast furnace slag (in the ratio 1: (2.5-3) is added to the mixer, soda ash or any other activating additives are added and mixed thoroughly. Water is added to the resulting mixture so that the moisture content of the mass is formed amounted to 5-7.5%. This wet mass is loaded into a press chamber and pressed at a pressure of 50-60 MPa. 8 further products are subjected to heat treatment - steaming.

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The proposed method and its advantages can be illustrated by the following examples of its execution.

Example 1. In a paddle mixer, 100 kg of granulated blast furnace slag, 33 kg of crushed blast furnace slag and 2 kg of soda ash were charged. The dry components of the mixture were thoroughly mixed and after adding 5.6 L of water, the mass was mixed again. The humidity of the mixture is 4%. The ratio of granulated and ground blast furnace slag was 3.0: 1. The share of alkaline activator amounted to 1.48%. The resulting wet mass was loaded into a press chamber measuring 250 x 120 mm, the filling height was 8.5 mm. The duration of pressing is 7 s. The pressures and strengths of the products are shown in table. 1.

Example 2. Under the conditions of Example 1, 7.1 L of water was added to the mixture; the moisture content of the mixture was 5%. Compaction time 7s. The pressures and strengths of the products are shown in table. 2.

Example 3. Under the conditions of Example 1, 10.95 L of water was added to the mixture; the humidity of the mixture was 7.5%. The duration of pressing is 7 s. The indicators of the pressing pressure and strength of the products are presented in table. 3.

Example 4. Under the conditions of Example 1, 11.75 L of water was added to the mixture, the humidity of the mixture was 8%. Compaction time 7s. The pressures and strengths of the products are shown in table. 4.

Example 5. Under the conditions of example 1 in

the mixture was introduced 13.4 l of water, the humidity of the mixture

amounted to 9%. The pressures and strengths of the blocks are shown in

table 5,

Example 6. Under the conditions of example 2, the ratio of granulated and crushed blast furnace slag was taken 2.5: 1, see the results in table. 6.

Formula of the invention

A method for the production of concrete products, including mixing crushed and granulated blast furnace slag, introducing water into the resulting mixture, followed by pressing the mass, characterized in that, in order to reduce the duration of production of energy, crushed and granulated blast furnace slag is mixed in a ratio of 1: (2.5- 3.0), soda ash or water glass in the amount of 1-42% are added, and the mass is pressed at a pressure of 50-60 MPa and with a moisture content of 5.0–7.5%. .

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