Autoclave aerated concrete: advantages, composition,

When choosing suitable building materials, homeowners prefer those that are easy to use, economical and have a high bearing capacity. These include autoclaved aerated concrete. About its advantages and production technology will be discussed in our article.

The advantages of autoclaved aerated concrete

Autoclave aerated concrete blocks are endowed with many positive properties.

But among them are a number of basic features that are the main advantages of this material:

• fire safety - aerated concrete does not burn and does not emit harmful substances when heated. Moreover, it can withstand an open flame for up to seven hours;
• large dimensions - the volume of this product is such that 1 block is a replacement for 20 bricks, which leads to a reduction in construction time;
• simplicity of work - the blocks have a small weight, so even one person can work with them;
• perfect geometry - autoclaved aerated concrete blocks have sides with deviations of no more than 1-2 millimeters. This allows you to create ideally smooth walls of such elements that do not require internal plastering. They are usually spat at once;
• heat accumulation - aerated concrete is able to accumulate heat, that is, first accumulate and then give it away. This is very useful for creating a favorable microclimate in the house;
• resistance to microorganisms - the blocks do not rot and are not covered with mold, since the material from which they are made is of no interest to microorganisms.

Also, the advantages must be attributed to the fact that this material can be easily sawed with a hacksaw. In the case of ordinary concrete products, this would require cutting of reinforced concrete with diamond circles.

However, in the process of installing communications, you still have to use a method such as diamond drilling holes in concrete. It is necessary, for example, when installing outlets in a concrete wall.

The disadvantages of autoclaved aerated concrete is only its high price. It should also be noted that finding a good supplier of such products is not so easy.

Tip! To purchase high-quality products created in accordance with building codes, you need to contact large and well-established manufacturers or their authorized dealers. Small, artisanal production, often violate the technology of creating material, which leads to its low quality.

The composition of autoclaved aerated concrete

Named material consists of several components that are in a certain percentage with each other. These proportions can be seen in the table below.

To obtain a composition with a specific volumetric weight, specific mixing instructions are used. It says how many kilograms of each substance is needed to get 1m? mixes.

Production technology of autoclave gas blocks

Let's consider step by step the entire production cycle, which is necessary to create building blocks. In addition, we will determine what equipment is required for the production of autoclaved aerated concrete.

Tip! For this purpose, experts recommend using the production lines of the company "Wehrhahn", since they are one of the best machines in this field.

Помол песка

In the apparatus called a ball mill, a wet grinding of sand takes place. The resulting product, sand slime, is sent to sludge pools with agitators installed in them.

There it is processed to the required density, after which it is pumped to the next section, where the material is mixed and dispensed. Dispersion of aluminum paste and water is also sent there - this provides for the existing production technology of autoclaved aerated concrete.

Mixing and dosing

Sand slurry, cement, water, lime, and aluminum suspension are mixed in the mixer, after which the resulting composition is poured into forms. A chemical reaction occurs in them, leading to the release of hydrogen, due to which autoclaved aerated concrete acquires a porous structure.

After that, the entire array is placed in the maturation chamber, where it is gaining hardness. After reaching the required strength, the formwork is removed.

Cutting blocks

For this stage of work, such equipment will be required for the production of autoclaved aerated concrete blocks as a cutting machine.

The procedure is as follows:

1. An array of material is sent to the turntable, where it is placed in an upright position. Then, with short strings, it is cut;
2. a side trimmer is used, which is used to form the length of a block of cellular concrete, to create a tongue and groove
3. in the same way, using strings, horizontal cutting of the array is performed
4. there is a trimming of blocks in height;
5. The material enters the second turntable, where the bottom layer is removed.

Note that the removed residues are not discarded, but sent for recycling. Of these, a return sludge is obtained, which is used again, which reduces production costs.

Autoclaving

After cutting the blocks, autoclave treatment of aerated concrete is carried out. To do this, all the existing material is installed on carts that are rolled into a special oven - an autoclave. In it there is a steaming of products. As a result, their structure becomes special, different from that which non-autoclaved concrete has.

Sorting and packaging

After autoclaving, the blocks are sent to the next production site, where they are sorted and packed. For this, a separating machine is first used. With its help, the entire array is divided by horizontal seams.

Further, the permutation apparatus is activated. He places the products on wooden pallets and directs them to the packaging site. There, the workers of the shop do their own hands to wrap them with shrink film and send them to the warehouse.

Conclusion

Autoclave aerocrete able to accumulate heat, in addition, they are fireproof, not subject to decay and have a perfectly even shape. The main components of such products is Portland cement and limestone.

The production of autoclaved aerated concrete includes the preparation of sand, the creation of a mixture, the cutting of blocks, their processing in an autoclave, sorting and packaging. You can learn more information about autoclaved aerated concrete from the video in this article.