SU365339A1 - METHOD OF MAKING CONSTRUCTION PRODUCTS - Google Patents

Description

one

Methods are known for manufacturing building products from autoclaved cellular concrete by molding them from highly viscous vibrating mixtures. However, these methods require the use of hot mixtures, which prevents the reduction of V / T due to the sudden loss of mobility of the mixtures due to the fast processes of hydrolysis and hydration of the substance, which significantly complicates and impairs their mixing.

The purpose of the invention is to achieve a non-autoclaved cellular concrete of equal strength with cellular autoclavable concrete.

This is achieved by the fact that product molding is performed on cold mixtures.

Forming cellular concrete is carried out in two fundamentally different ways:

1) with vibration and heating of the mixtures in the process of expansion;

2) with the vibration of cold mixtures without heating in the process of expansion.

In the first case, the rate of expansion is greater than in the second. In addition, the heating of the mass to 50-60 ° С considerably accelerates the processes of hydrolysis and hydration, as a result of which cellular concrete, after expansion, acquires high structural strength.

The disadvantage of the first method is that the equipment for molding cellular concrete in connection with necessity is complicated by installation of special heating organs such as inducers or other heating sources and power systems, as well as the consumption of electricity or other fuel. In the second case, the molding of cellular concrete is significantly diminished. The prepared cold mixture with a temperature of 20-22 ° C is poured into a mold set by a vibrating plow. The swelling of the mass of Nd in 1bration lasts about 7 minutes. The temirature of mass in the process of swelling increases by.

A sufficiently b.ch's mass swelling rate is provided by a high concentration of hydroxyl non (Ph 13) due to

a higher solubility of lime at lower temperatures, low w / t, and a slight increase in the mass temperature during the swelling process, as a result of which favorable conditions are created for the reaction of the aluminum powder with lime, accompanied by the evolution of hydrogen, swelling the mass.

The enhanced plastically-viscous properties of the mixture, due to low i / t, provide the mass and, after expansion, with the necessary stability allowing transport of the Molded articles to the air. The advantage of the second method is that it allows you to refuse both the preliminary heating of the mixtures, which is typical of the conventional and vibrational production technology of cellular concrete, as well as the concomitant heating characteristic of the vibro-induction thermal method. As a result, there is no need for a navigation device. Products directly after molding are sent for heat and humidity treatment at atmospheric pressure. The plates are left to cure under natural conditions at 90-100% relative efficacy for 20 days. : Ten-humidity treatment at atmospheric pressure can be carried out using any of the following methods: ionization, electrical heating, induction heating, infra-red radiation, contact heating, as well as mine and H1, spruce tunnel tunnels, vertical cassette forms and jui socially equipped stands. lioBbiil is a way of nosoling to set up a pipeline for the production of unclamped cellular concrete. 11After molded, the units enter a single chamber, a tin cell, which is p: asnologeted on the ratchet l; epta, moving spihropically with parts. At the beginning of the chamber, in the area of 15–18 m, the tape is applied to the sides of the forms: the surface of the products. This creates the so-called thermal load, which prevents thermal expansion and thermal expansion. 5 10 15 20 25 30 35 40 treatment is carried out at 80-iOO C for 5-8 hours. Non-autoclaved cellular concretes can be made from any type of cement. In order to intensify production, and to increase the economic efficiency of non-autoclaved cellular concretes, well-known methods for accelerating the hardening of concrete can be made: dry and wet binder of conventional Northlaid ceita, reduced v / m mixtures; the introduction of chemical accelerators, hardening cements, and the introduction into the mass of various dowels. The proposed method for the production of products from non-autoclaved cellular concrete has high technical and economic efficiency (compared to existing methods), as it can significantly simplify the process and increase production reliability, replace the complex expensive autoclave technology with a simpler and cheaper heat treatment at atmospheric without deterioration of the physical and technical properties of cellular concrete; the most zero to use in the chewing properties of celite; adjust conveyor production and increase libinycK products; improve sanitary and hygienic working conditions and technical safety. Method of production (Method 1-13); general construction of non-autoclavable cellular concrete and non-autoclaved cellular concrete and molding of highly viscous mixtures, which are designed to equilibrate with non-autoclavable concrete. autoclave with cellular concrete: T1-: UHT.E11NYA, molding, section production is carried out on cold mixtures.