Concrete from screening - general information, types of

Taking the preparation of concrete solution with your own hands, it should be borne in mind that its parameters are influenced by many factors. In particular, the appearance and quality of the filler plays an important role, therefore it is also necessary to approach its choice very responsibly. The most traditional filler is sand, but quite often for these purposes they use screenings, to which this article is dedicated.

General information

So what is called screening? Most often it is a rock fragmented and sorted by fractions. Also on sale can be found screenings recycling of various building materials.

In any case, regardless of the type of crumbs, it is environmentally friendly and safe for humans. Thanks to availability and low cost, it has become almost indispensable when carrying out many construction and decorative works.

In particular, the crumb is used in housing construction, in the road sector, in the manufacture of concrete products, etc. In addition, screenings are often used in landscaping.

The main performance indicators of this material is the size of the module.

Types of dropouts

As mentioned above, screenings can be of different types.

Most often in the manufacture of concrete use the following types of it:

• Granite;
• Concrete;
• Concrete с кирпичом.

Now take a closer look at the features of different types of crumbs.

Granite

Granite отсев является наиболее популярным видом наполнителя. Он представляет собой крошку, размером фракции в пределах 1-10 мм, которая обладает серым или красноватым цветом. Благодаря различным оттенкам красного цвета, гранотсев активно используют при изготовлении тротуарной плитки и всевозможных железобетонных изделий, кроме того гранотсев нашел широкое применение в садовом хозяйстве.

It must be said that the concrete from granotseva is distinguished by high strength and density. The only thing is necessary to observe the proportions of concrete from granite sifting. The crumb can be used as a full or partial sand substitute. Accordingly, in different cases, its proportions will be different.

Due to the cheapness of this filler, reduced construction costs. In particular, such concrete is much cheaper than the solution with the addition of rubble. Other advantages include the fact that it does not affect the performance characteristics of concrete structures.

Concrete

The main advantage of concrete screening is low price. The crumb is produced by recycling concrete. As a result of the crushing of concrete products, the size of the crumb fractions is 1-10 mm.

Screening concrete is widely used in the following areas of construction:

• In the field of road construction;
• In the manufacture of various concrete products;
• In industrial construction;
• When landscaping, etc.

Dropout бетона и кирпича

This material is a mixture made of products of destruction or products of processing of bricks and concrete. Such a baby, in addition to breaking a brick, contains a certain part of cement stone and a fraction of other building materials.

Concrete preparation

Proportions

As mentioned above, the use of screening as a filler is a more advantageous solution than sand and rubble. As a rule, sifting concreting is performed with reinforcement. When pouring screeds, where such a filler is most often used, the layer thickness is 7-10 cm.

To obtain a sufficiently strong material for pouring, for example, a yard, it is necessary to observe the following proportions of concrete from the granotsev:

This proportion allows you to get concrete brand M150. If construction materials require a more durable material, higher grade cement can be used. For example, if you prepare a mortar on the basis of cement M500, then this proportion will allow to obtain concrete brand M250.

However, one should not make a common mistake among beginning builders - to increase the content of cement in the solution. The high content of cement does not increase the strength of the material, but rather reduces it.

Note! It is prohibited to use yellow sifting, which contains clay, as well as black chips, i.e. with graphite content.

If the granotsev does not completely replace sand, then it is possible to use such proportions of concrete with sifting:

With such a proportion, the addition of crumb practically does not increase the volume of the solution, since it will fill the voids between the rubble and strengthen the bond between the sand and the rubble.

Preparation of the solution

Now consider how to make concrete from granotseva. To do this, you need a concrete mixer, especially if the composition will have crushed stone, since it is very difficult to mix such a solution yourself, even if it is mixed in a small volume.

Instructions for the preparation of concrete solution is as follows:

• First you need to mix dry ingredients.
• After the mixture of screening, sand and cement is well mixed, water is gradually poured into the composition.. If necessary, a plasticizer and other additives are added at this stage. Recommendations for their use are always on the package.
• After obtaining a homogeneous mass, cleaned and crushed in water or gravel is added to the composition.. Then all components must be thoroughly mixed. If necessary, you can add a small amount of water, but you can not allow its excess, as in this case, the filler will destroy the concrete structure, in addition, excessive water content will increase shrinkage.

Note! For the preparation of high-quality building material it is necessary to use fresh cement without impurities, as well as clean (preferably drinking) water. During the year of storage, cement loses up to 40 percent of its strength. Also significantly reduce the strength of cement stone can and various impurities in the water.

At this process the preparation of the solution is completed. It is necessary to develop the resulting mixture within two hours.

Conclusion

The use of screening as a filler for concrete has become widespread among builders, as a result of the many advantages of such a solution. In addition to saving, baby gives you a strong and durable material. The only thing is that it is necessary to strictly observe the proportions, and also pay attention to the quality of all components of the mixture.

From the video in this article, you can get more information on this topic.