SU66030A1 - The method of obtaining awakened concrete - Google Patents

Description

The use of burnt rock formations to produce aroused concrete is well known. The awakened concrete of these rocks has a high activity, sometimes not inferior to ordinary cement concrete, and in some cases they reach very high strength (300-400 kg / cm), close to their strength of high-grade cements.

The technological process of producing such aroused concrete is simple. It reduces to the treatment of the main mass with additives and water on the runners. However, this production has a number of significant disadvantages:

1) “roasting of rock in dumps lasts for several years, as a result of which only old waste dumps can be used for production;

2) the heterogeneity of the calcination conditions leads to a heterogeneous activite of concrete;

3) the exploitation of the operating dumps is difficult, since the burnt rock falls asleep fresh;

4) the main production equipment — runners — is an imperfect and inefficient Mechanism;

5) During production, the wet m-assa is ready, requiring immediate installation; transporting or storing awakened concrete is not possible.

The author has established that these disadvantages can be completely 3: countries, and the quality of the aroused concrete is significantly improved if the rock (and slag) to be activated is subjected to firing in a shaft furnace due to the unburned carbon contained in it and the required amount to burn. The mixture obtained is subjected to grinding without moistening, and the € .5 forming powdery product is used as a baking material.

The technological process of production of awakened concrete according to the proposed method consists in the following.

I. The rock coming to the surface (or slag) is directed along the chute to

shaft furnace, where it is subjected to firing by 1sod-e of the coal 1c in it coal.

Usually, empty hydrogen contains 20–25% coal, while the content of coal in rock, as in slag, reaches inotda.

It is recommended that, at the beginning of the firing, small layers of coal be introduced into the shaft furnace. It is estimated that rock burning requires no more than -10-15% coal.

Simultaneously with the rock, a certain amount of limestone is fed to the shaft furnace with the help of the hoist, and the hoist, which burns simultaneously with it (occasionally with the rock.

2. Curd {enna rock and lime after unloading from the kiln are fed to hammer crushers of the type Klero.

3. After crushing, both components — rock and lime — are mixed in mixing auger or other mixers of forced action, after which the nocTiynaeT mixture on the salary of the finished product, where its silage occurs, takes place. The resulting product is the "semi-finished product of awakened concrete and stored" in the warehouse until it is sent to the construction site or to the construction plant where the final processing of the material is carried out to obtain the desired grade of concrete or mortar.

The final processing of the “semi-finished product” consists in short-term processing it in a mortar mixer with a positive effect with the addition of the required amount of water.

The semi-finished product is in a dry condition: it is a material of lower grades, but it is quite satisfactory for the production of solid concretes and mortars, their widespread use in construction.

In order to obtain high-quality concretes, the semi-finished product can be subjected to short-term treatment on runners with a simplified structure. According to the data obtained, the processing of a semi-finished product on runners is 2-3 times less than the usual processing time of the Mass, and can be carried out on low-power runners that can be installed on any construction site.

It has been established that the treatment of solutions 1 on 1c; ibsitelny | X runners. Significantly improves the quality of solutions and increases the aphorism of concrete in comparison with solutions obtained in concrete mixers. In some cases, the treatment of the mass on the runners makes it possible to obtain concretes and solutions of considerable strength, then KaiK does not produce these same solutions or concretes in conventional aggregates. Replacing conventional mortar mixers with mixers, runners could not find widespread mixing and low productivity of mixing runners, their high weight and considerable cost.

The proposed method of getting into live material from waste rock ((local raw materials) does not require heavy costly; their1 and low-productivity runners for the subsequent processing of "semi-finished product. In this case, the usual millstones can serve as rollers and as a bowl for runners. extremely simple and can be; dried by local forces in small plants. The cost of such runners is no higher than the cost of conventional mortar mixers. However, when processing “semi-finished products on such runners, the quality of the products will be nachitelno higher than peremeshivanii- to-omnonentov rastvoro- or in a concrete mixer.

The performance of the runners during the processing of the semifab | rica can be completed up to 15–20 m per day, which is quite enough for medium construction projects. From this amount in the ground material, wall blocks can be made daily, equivalent to 6,000–8,000 bricks in a masonry — or according to the number of other building parts.

Prev 1M et "s about the e N e and

The method of obtaining awakened concretes from slags and empty coal rocks, differing in: m lime, after which the mixture, without

the fact that the subject to the activation of the humidification is: podvo (p: they grind

rock and slag are calcined to obtain powdered

gu in Shahtnoy furnace due to the content of the hanging material coming

The coal that has been burned in it has been re-burnt coal for further processing from the West along with the necessary quantitative methods.

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