Reinforced concrete rings: the existing types and subtleties

None of the serious construction now does not do without all sorts of concrete products. Reinforced concrete rings occupy a special niche in this diversity. Virtually every underground structure, in one way or another equipped with these structures.

How are they good

First of all, it is worth noting the strength of these structures. It is achieved through the use of heavy types of high density concrete and the presence of a metal reinforcing frame.

In addition, not the last role here is played by the round shape of the products, because a closed system is much stronger than a linear one.

• Due to the use of high-quality materials, the warranty period of operation of such structures can be up to 50 years or more.
• If we compare the installation of the structure with the help of reinforced concrete rings with brickwork, then the terms of construction are much faster. At a ready ditch the well can be mounted in 1 - 2 days.

• Accessibility plays a big role. Any factory of concrete products can offer you these designs, and their price will be quite loyal.
• From a business point of view, the production of reinforced concrete rings does not require large investments. Equipment and materials quickly pay for themselves, plus the instruction is available to any worker.
• And finally, with a great desire, it will not be difficult to make such a ring with your own hands.

When it comes to drawbacks, many point to the heavy weight of the reinforced concrete ring. But this is only relevant during transportation, when the object is ready, a lot of weight is more of a plus, heavy structures are particularly tough and durable.

There is another nuance, as mentioned earlier, it is not difficult to set up production, because of this, organizations that make a marriage appear periodically. Therefore, it is better to apply to proven, reputable firms.

Tip: all such products are made based on GOST 8020-90, it clearly regulates the process. But in order to circumvent it, special TU (technical conditions) are compiled, therefore, looking through the certificate of quality, pay attention to what regulatory documents produced the product.

Varieties of designs

The most common so-called well wall rings. They are distinguished by clear geometric shapes and the absence of a lock joint, the cut of the ring is smoothly smoothed. These are the forms they prefer to do with their own hands.

Plus the price of factory products of such a plan, the most affordable.

• Next in the popularity rating are products that have a castle connection. This is a more reliable and proven option, although the price is higher. A docking board is made on both sides of the structure, on the one side for expansion, with the opposite for contraction. Thanks to this connection is carried out without gaps, plus he is not afraid of ground movement.
• Additional and support rings are used for the arrangement of the necks, turns and installation of technologically complex objects. They have different shapes and are often custom made.

• Drainage structures throughout their area are equipped with through holes. They found their use in the arrangement of drainage and drinking wells.
• Still manufactured products stakannogo type, that is, with a monolithic concrete bottom. With their help, urban infrastructure communications are being developed. These can be gas, communication or water wells. In private construction, they are used to equip sewer septic tanks.
• Strange as it may seem, it will sound at first glance, but reinforced square rings are produced. They are often used for arranging underground gas or water distributors.

Production details

Although the dimensions of reinforced concrete rings have a wide range, the installation system and instructions for production are, by and large, similar. We will try to highlight the most frequently used techniques and recipes.

A few words about the production technology

Fortunately, high-tech equipment for the production of reinforced concrete rings is not required.

For mass production of products, besides the material itself, several metal forms are enough, a crane-beam for moving loads up to 3 tons, preferably an indoor, warmed warehouse and necessarily a vibropress for producing reinforced concrete rings.

• The fact is that all products from heavy types of concrete require high-quality pressing. Of course, there are additives that reduce the coefficient of shrinkage, but they are expensive, plus not always effective. Therefore, without vibropressing profitable production can not be adjusted.
• For the organization of production, the question of how much a reinforced concrete ring weighs and what volume of concrete for reinforced concrete rings is also relevant. Of course, all these data are in the reference literature, but tentatively it can be said that the weight of products ranges from 250 kg to 2 tons.

• As for the volume of concrete, it also depends on the size of the product. Need to focus on the fact that the minimum consumption of 1 product will be 0.1 m? and then can reach up to 1m ?.
• If we talk about profitability, then on average the cost of 1 construction will be about $ 30. accordingly, the market value will be 2 times higher. Two skilled workers are able to pour about 25 rings per shift. Read on for yourself.

Tip: now there are vibroforms, they are equipped with a vibration mechanism and are designed specifically for the manufacture of rings. They cost more, but it is more convenient to work with them.

How to make a ring yourself

For the manufacture of any w / w products, you will initially need a form.

The manufacture of reinforced concrete rings is no exception.

• The easiest way is to pick up two pipes of different diameters and make a shape based on them.. These can be ventilation pipes or barrels. It is best to work with plastic forms, but to find such sizes can be difficult.
• When the required cylinders are found, you can proceed to the construction of the form itself.. The outer contour will be divided vertically into 2 equal parts. But before you cut, you need to attach from the outside along the separation line 2 - 3 window sheds. The locking rod in the sheds should be easy to reach and fit.
• After the canopies are welded or screwed, you need to carefully cut the contour of the grinder from the inside, along the previously marked vertical line. Be careful not to damage the sheds.

• The inner contour of the form is done in a similar way.. From within fastenings are mounted and the cylinder is cut into 2 parts. Only in this case the parts of the inner contour should not be the same. The circumference is divided into 3 sectors and one of them is cut. The form must be based on a rigid, even basis.
• The outer and inner contour are fixed relative to each other by means of wooden struts or metal studs with thread. Plus, the area of ​​contact with the solution is lubricated with oil-based composition or wax. So it will be easier for you to disassemble the form after the ring hardens.
• The reinforcing metal frame is connected or welded with a rod or reinforcement with a section of 6 - 12 mm. The interval between the horizontal rings is approximately 200 to 250 mm. The vertical components of the frame are placed at the same interval. The frame itself is better to mount and install in the form before the contours are fixed among themselves.
• The solution is poured in portions, after pouring the next portion of the composition it should be well tamped with a metal rod. The better you push the air out of the solution, the stronger the product will be.

Important: before making rings with your own hands, think about how much volume of reinforced concrete rings you need. This value is calculated by the simple formula V =? R? H. Where is the number? = 3.14, R is the inner radius and H is the height of the ring. This formula will be useful in the selection of factory products.

The composition of the solution

• If you decide to buy a ready-made composition, this type of product can be made of concrete M200 - M500. It all depends on the design purpose. If it is a shallow dry well for decoupling, any communications, then M200 is enough. But if you are doing a septic tank or a deep drinking well, then it is better to take better concrete.
• Concrete can be prepared independently, all proportions of the most popular types of mortar are given in the tables. But the quality will greatly depend on the components from which the concrete will be made.
• Cement can be used only brands M400 or M500. The sand must be clean, preferably washed. Water is normal, tap, with low acidity. Particular attention should be paid to the selection of coarse filler. First of all, the fraction of rubble should not exceed? on the thickness of the ring. Then, it is important from what kind of concrete for concrete you are going to make a solution.

• There are 3 main types. The most reasonable in price, but not in quality, is limestone rubble. Behind it is gravel and closes the top three most high-quality granite rubble. The frost resistance of the solution on limestone is equal to F50, on granite F200. Also W4 water resistant to limestone and W6 to granite.
• Plasticity and all other indicators can be increased with the help of additives or use old-fashioned tools. The people argue that water resistance can be improved by adding potassium glass to the composition. For the fortress advise PVA glue. And the fluidity of the composition will increase if you add a liquid detergent. But not more than 2% of the volume of cement.

On the video in this article there are a few useful things.

Conclusion

According to GOST for reinforced concrete rings, this type of concrete goods has unique strength characteristics. But during installation, they should be handled with care, as a blow may form a through crack and all your efforts will be in vain.