Deep vibrator for concrete: features of mechanical,

It is difficult to find construction work where no mortar is used, for example, concrete. To work with him there are special tools and tools that help to achieve the required quality. In this article we will focus on the deep vibrators used to seal concrete solutions in reinforced monolithic structures, concrete and concrete products for prefabricated construction.

General theory

Obtaining high-quality concrete is impossible without compaction of the mixture, it also affects the strength of the material and the durability of its operation.

Otherwise, it will contain a large amount of air, for example:

• in plastic consistency, the parameter can reach 15%;
• in hard - up to 45%.

Approximately assumed that 1% reduces the strength of the finished concrete to 5%. Its compaction is just necessary for the removal of air bubbles and the uniform compact distribution of the components of the mixture.

Otherwise, the trapped air and coarse aggregates will make the material:

• porous;
• with heterogeneous structure;
• fragile.

Concrete mix will help concrete deep vibrator.

Models are:

• internal (deep), when the working part is immersed in the concrete mix and transmits vibrations through the housing to it;
• superficial (pad), which are installed on the laid concrete mix, and the vibrations are transmitted to it through the working platform;

• outdoorthey are fastened with a grabber directly on the formwork and they transmit vibrations to the concrete mix right through it;
• виброплощадки - stationary forming units, which are used in factories and landfills for precast concrete goods.

The process is as follows:

1. The created oscillations of small amplitude are transmitted to the particles of the concrete solution, because of which it becomes fluid, acquiring increased mobility.
2. In this case, the particles begin to move, trying to occupy the most stable position under the action of gravity, and the volume of the concrete mix becomes the smallest.

This ensures a dense concrete with a solid structure that is not afraid of water and frost. Air bubbles at the same time come to the surface, and the liquid becomes heavy. Temporary fluid state allows it to spread in shape and compacted under its own weight.

Tip: for best results, it is better to use multi-frequency (with a different number of vibrations) vibrators. In order not to buy, they can be rented, which is much more profitable.

Equipment may have the following type of drive:

• electromechanical;
• electromagnetic;
• pneumatic;
• hydraulic;
• motor.

In addition to the dry components, there is also water in the solution. From theory we know that for cement hardening it is enough in an amount of about 10% of its mass. However, in this case it will be inconvenient to work with the solution.

Therefore, water is usually in concrete is more than necessary. Drying, it also begins to form pores, affecting the strength of the material for the worse. In this regard, one compaction is not enough to obtain the necessary concrete. It is also necessary to calculate the cement-water ratio in order to obtain the required parameters.

Tip: The use of plasticizers in the mixture will increase its mobility, will reduce the volume of water, which will reduce the pores and save the binder (cement).

The use of a vibrator makes it possible to remove excess water from the solution, and plasticizers will shorten the process itself. This will guarantee that the mixture will not stratify due to long vibrations.

Tip: if you need to dismantle concrete structures or make grooves in them, cutting reinforced concrete with diamond circles is today recognized as one of the most successful in this matter.

Deep Vibrators

Having dealt with the theory, let's dwell on the most necessary equipment for its implementation - a deep vibrator for concrete. It is used to carry out the compaction of concrete solutions during their installation.

Mechanical oscillations produced by equipment actively contribute to this when it is immersed in the mixture.

When using deep vibrators in solution:

• shrinkage is reduced;
• creep decreases;
• frost resistance increases;
• waterproofing is created.

Kinds

Models can be high-frequency and mechanically driven. The price of the latter is lower, however, their service life, the quality of concrete compaction and productivity are significantly lower. The best result is achieved by vibrations with a frequency of 10,000-12,000 per minute.

In this case, for mechanical under load, the speed drops to 9000, for high-frequency, this indicator does not exceed 5%. Because of this reason, the use of high-frequency equipment is more appropriate.

Mechanical

The drive may consist of a gasoline or electric motor. A vibrator with a built-in eccentric is immersed in the concrete mix, which is supplied by a flexible shaft torque.

Advice: the mechanical vibrator with an electric motor showed itself best in its work.

The gasoline engine limits mobility and is justified only where there is no electric branch. The way out of this situation can be a kit, which includes a gasoline generator and a deep vibrator for concrete under 220 volts. Dingo, EnarAVMU (Spain), Imer (Italy) are considered to be the most convenient equipment of such a plan. The mass of the engine does not exceed 5.5 kg, which makes it possible to carry it easily on the building site on the shoulder.

Tip: do not buy the vibrator head for a vibrator with a diameter of over 50 mm. Otherwise, due to the severity, it can simply damage the equipment - disrupt the threads on the flexible shaft, and its cost with it is usually equal to half or slightly higher than the entire set.

To extend the service of a mechanical vibrator, it is necessary to conduct maintenance of the flexible shaft every six months. At the same time, it is recommended to disassemble and clean the electric motor. Very often during this time a large amount of mortar and cement milk accumulates in it. This makes it difficult to cool the engine, which can cause damage.

Tip: if necessary, laying through the foundation of the necessary communications, you will help diamond drilling holes in the concrete necessary for the diameter of the crowns.

High frequency

In this case, the design is somewhat different - the electric motor is installed directly in the vibrator head and is equipped with eccentrics. Its body is waterproof, and the design provides electrical insulation.

Power is a safe voltage of 42V with a frequency of 200 Hz, and therefore it is called its high frequency. The voltage on the equipment comes from the electronic converter, which is powered by 220V.

The latter is built on electronic components, without the use of mechanical parts. Its service life is almost unlimited. The system of protection against various emergency situations made the device absolutely safe for the vibrator connected to it and for the operator. High-frequency equipment is fully protected from external influences and can be used even in the rain.

It differs from standard mechanical devices:

• long service life;
• high performance;
• durability and reliability;
• minimal maintenance (it is enough to flush the parts immersed in concrete with a water pressure);
• low operating cost.

Tip: construction companies, constantly conducting concrete work, should have in stock one vibrator.

Homemade vibrator for concrete

The industry today is ready to offer customers a variety of types of equipment for sealing solution. But, it can be made independently, and for this there are several ways.

We use household puncher

1. You will need equipment with a capacity of 1.5 kW. The whole process will occur in the "hammer" mode, so switch the punch in advance.
2. The attachment can be the one that comes with the peak, which you will need to rest on the formwork.

Tip: use a greasy puck to achieve a good connection between the peak and the formwork.

The use of this homemade vibrator will allow for a more uniform distribution of the concrete mix. The effect, of course, is difficult to compare with real professional equipment, but it will still be there, so you can safely use such a device for simple constructions.

If you need to process a relatively shallow depth of the mortar, apply the “splicing” method. In this case, at the end of the nozzle, weld another one so that their total length is equal to the depth of the processed form. The process concludes with its abutment in the bottom of the last and its permanent rearrangement. So you can handle the required area.

Drill

Replace the punch can be an ordinary hammer drill with a capacity of 1 kW or more. In this case, you will first have to start making a special nozzle, which will have an eccentric and a durable stainless tip.

The instruction looks like this:

1. Pick up a stainless steel tube with a length of 400-600 mm and O 30-40 mm.
2. Fabricate the inner core of metal pin O 12-15 mm. It is necessary to weld a rectangular plate 15-20 mm wide to it. It is necessary to shift the entire mechanism to the side and maintain vibration.

1. Drill a transverse through hole at the end of the rod for mounting the drive.
2. Align the fabricated core with the steel tube.

1. Pick up 2 bearings for free rotation of the core, the latter should fit tightly in them.
2. Get the rod inside the tube and tack on it the bearings on both sides.

Tip: cut from the nose of the rod, leaving about 5-10 mm. Do not forget to protect the bearings on both sides of dust and dirt, otherwise the design will quickly fail. At the same time do not save on them, as they will bear the main load.

1. Slip a sturdy sleeve onto the second end of the rod, ensuring full protection of the rotational path.

1. Put the tube on the shaft so that there are 40-50 mm left on both sides. During rotation, the rod will provide vibration, which is required from the equipment.
2. On one side, fit it onto the previously prepared sleeve, then press it into the hole made in our core and connect them together.
3. When installing the bushing, press it against the bearing, hiding the connection securely.

1. Pull the hose over the sleeve and secure it with a hose clamp, create a protective cover for the tip.

After this, a do-it-yourself vibrator is ready for use.

Conclusion

Working with a concrete mix requires some knowledge if you want to end up with high-quality material with the necessary characteristics. To do this, apply deep vibrators, which facilitate the process and allow to achieve the stated qualities.

In addition to professional equipment, for simple work, you can make them yourself from improvised means. The video in this article will help you find additional information on this topic.