Concrete rings : scope , size and price , making their own hands

One of the most popular concrete products is a concrete ring.It is used for various purposes.The first is the different arrangement of wells for water supply.In no less concrete ring is used for devices of sewage wells and to protect the water supply system components and heat underground.Inside are placed valves, stop valves, sand traps, and also used for wiring and heating ducts.Private developers use them to mount improvised septic tanks.To do this, they have a special concrete cover with a hatch.

In this connection it is necessary to know the geometric parameters and the variety of concrete rings.Especially helpful for those who are beginning to self-construction or remodels engineering structures.Concrete rings: scope, size and price, making their own hands.These questions will be discussed in this article.

As marked concrete rings

regulation of concrete products such as concrete ring is carried out by GOST 8020-90.It described in detail the appointment of products, their labeling and size.Rationing strength of concrete, which is used for the manufacture of rings, made by GOST 100180. Determination of frost resistance of products is carried out in accordance with the state standard 10060, and its waterproof GOST 12730.

Modern industry produces several reinforced concrete structures form a ring:

• Rings for wells Flatend.
• rings for wells with a locking end.
• Dobornye ring.
• Repair rings.
• Support rings.

Marking concrete rings is standard.It consists of both an alphabetic and a number of digital symbols.The letter designation reflects the area of ​​application.A number of digits indicates the dimensions.

Deciphering the alphabet labeling following:

• COP - ring of wall, is designed for the working chamber or the wells mouth.
• KSD - ring of wall having a blind bottom.
• KO - support ring.
• CK - fecal ring, designed for devices working chambers wells of household sewage system.
• CLA - ring designed for the construction of the storm water drain.
• CVG - rings for gas and water networks.

This list suggests that, as such, is not well ring, all of them belong to the category of the wall.No standard and repair rings.As they use conventional wall ring with a smaller diameter, which are placed in the shaft to deepen wells.

As for digital marking of concrete rings, then it contains information about the dimensions of the product, expressed in decimeters.And the inner diameter says the first number, the second is responsible for the height.For example, marking CS 6-10 indicates that this concrete wall ring inner diameter and a height of 6 dm 10 dm.Concrete product in factories often manufactured of concrete rings having a diameter of 0.7 to 2 m and a height of 0.1 to 2 m at a thickness of 7 -20 cm wall

rings cast concrete grade 200 -. 500. Reinforcement inwall of concrete rings practically used as concrete excellent resistance to compression and lateral earth pressure.Only products that work in heavy ground conditions, reinforcing steel rebar with a diameter of 10 mm, which does not form cracks.

concrete rings cost is directly dependent on their size and grade of concrete used.In addition, different manufacturers can conduct much different pricing policy.

Concrete collars with socket locking

One of the most popular varieties of concrete manhole rings is the construction, provided with end locks.They have a peculiar kind of recess at the end of the ring and not give a shift to products with respect to each other under the action of groundwater or groundwater loads.In addition, the lock perfectly enhances the tightness of joints.

In contrast, the ring having a flat end is not as well maintained ground motions.They can be so strong that the ring is moved almost half the diameter of a septic tank or well shaft.Such cases are not uncommon, when the location of the object there is a strong quicksand underground.This term is very fragile clay, sandy or silty soil liquefies under the influence of groundwater.

How to make their own concrete rings

Buy 4 - 5 rings for a septic tank not be easy, but if you do not have at least 10 articles, it is advisable to make them yourself.You have to understand that this process is quite time-consuming, as for the manufacture of rings required to build a very complex formwork construction.In addition, the work itself pouring concrete formwork requires a very high accuracy.This will avoid the occurrence of voids and irregularities in the concrete.

In order to prepare a solution is taken a standard mixing ratio: 1 part cement, 3 parts sand and 1 part crushed stone.Dry components filled into the mixer and mixed thoroughly.Thereafter there was added gradually in small portions to water, adjusting the consistency to the desired concrete mix allowing the concrete uniformly distributed within the mold.

the production of home-made concrete rings required to comply with the following process requirements to get the expected quality:

• Steel collapsible form must be very strong.
• To prepare high-quality blend to be used with brand cement is below 500.
• As the filler need to take small fraction gravel no more than 5-10 mm in size and washed sand.
• concrete mix must be sealed with a vibrator.
• If you open the product in the cold season, you definitely need to use electric heating.

picture below the casting form consists of two half-rings which are made of very strong sheet steel with a thickness of 1.5 - 2 mm.To the ends of welded stiffeners, and set the length of the connecting plate, tightening half rings into a single structure before concreting.

Removing the outer casing is not a complex process: it is enough just to unscrew the bolts and tapping the walls with a hammer.Removal of the inner part of a more complex.To facilitate this process, the form is placed inside the two narrow walls or square tube.To remove parts can simply knock the struts.

use of fine aggregate for concrete is justified by the fact that the thickness of the ring is not very big.It is only between 7 and 9 cm. Therefore, filling in the rubble, the solution may be a deal-breaker, since voids are formed and the ability to destroy the ring.A very important role is played by vibration compaction, without which it is impossible to completely remove air bubbles and shells, which greatly reduces the strength of concrete.Solve the problem of simple shtykovaniem can only partly.If the presence of no special construction of the vibrator, it is possible to use an ordinary punch.It is inserted into a scrap fittings, the end of which is welded thick steel plate.

For the seal to include tools and forth motions to rest it to the outside top of the form the outside.Metal transmit vibration concrete.As a result, it will settle down and compacted.

Since concrete rings are obtained very heavy, their installation without the use of special equipment is almost impossible.Therefore, for convenience in casting process must be installed in the form at least 4 mounting loops of wire diameter of 8 - 10 mm.The ends of the wire are bent and deepened into the concrete by at least 40 - 50 cm.

Thus, if you decide to make their own concrete rings for wells or septic tanks, make it quite feasible, if there is a special metal formwork.