Concrete b20: technical description, characteristics and

The classification of concrete solutions allows you to use them more efficiently. So, expensive structures, designed for the construction of high-rise buildings and industrial complexes, you do not need in home construction. The most demanded when pouring various foundations, pavilions, stairs, paths and other structures for domestic use is concrete class B20, which will be discussed in this article.

General provisions

Concreting is used in construction everywhere. Cement stone in combination with strong fillers can create a solid monolithic structure that can play the role of the foundation of a building or even its walls.

This material is resistant to all weathering, mechanical damage and moisture penetration, which guarantees it a long operational life.

Technical description

What is the grade of concrete B20? This is the M250. That is, if you see a solution with the classification of B20 or M250 on the counters, then keep in mind that this is the same thing. We now turn to the consideration of its structure.

Structure

The quantity of the binder, water and fillers is regulated according to GOST 27006. Ensuring all the conditions in this document guarantees the appropriate quality of the solution.

The composition of concrete B20:

Tip: if the used gravel has a moisture content of more than one percent or sand is more than six, then it is necessary to reduce the amount of water used. Otherwise, the solution will be too liquid and with less strength properties.

Elasticity

This is a very important parameter that is responsible for how much pressure the finished structure can withstand. It is regulated by SNiP 2.03.01.-83, and the main determining factor is the size of the filler used:

Main settings

Technical characteristics of concrete B20:

1. Frost tolerance (F). This is the ability to transfer without adverse consequences a certain amount of freezing and thawing. Concrete BST B20 is able to transfer one hundred of such cycles. The use of special additives can increase this amount to two hundred.
2. The mobility of the considered concrete mixture is P2-P4 with a draft of a cone of about four centimeters.
3. The average strength of this class is 262 kgf / cm²that guarantees high resistance to any mechanical stress. It is noteworthy that 70% of its total value is recruited in the first 28 days after pouring, and another 30% within six months.

Tip: after the concreting process is finished, it is recommended to cover the cement surface with plastic film and water it. So you will improve the quality of the setting.

1. The proportion of concrete B20 is 2300 kg. It is very important to consider when using for walling.
2. The density of concrete B20 is 2405 kg / m³. But it should be remembered that this parameter depends on the performance of solid filler and may vary.

1. The moisture resistance of the material under consideration is W6, but can be increased by adding modifiers to the W indicator.
2. Price varies from 2800 p. up to 3500 r. Depending on the manufacturer and additives used.

Additional benefits

In addition to the fact that you get a reliable and durable construction, which is resistant to any weathering and mechanical damage, there are a couple of advantages in using B20 concrete:

• Concreting availability with your own hands. The main thing is to prepare the formwork, install the reinforcement and order the right amount of mortar.
• Simple manufacturing instructions. In order to save, you can use the above proportions and prepare the desired mixture at home. She, of course, will be inferior in quality factory, but will be much cheaper.

Tip: if you decide to knead the concrete yourself, then it is recommended to do this using a concrete mixer. It will facilitate your task and allow you to achieve the necessary uniformity.

Conclusion

Класс бетона В20 является наиболее распространённым в частном строительстве благодаря рациональному соотношению стоимости и прочностных показателей (см.также статью «Морозостойкость бетона: оцениваем поведение материала при низких температурах»).

Its use guarantees the durability of any construction you build:

• strip or monolithic foundation,
• tracks
• pool,
• stairs and so on.

Also a pleasant moment is that it is quite possible to make it at home, the main thing is to adhere to the correct proportions.

The video in this article will provide you with additional information that is directly related to the materials presented. Use only the best in construction!