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By its nature, concrete consists of cement, aggregate and water, which is mixed, then poured into a form to cure and bind into a solid. When the concrete is poured, it does not pour evenly, resulting in the entrapment of thousands of air bubbles into the mixture. The bubbles are called entrapped air. They can vary in size and shape. Depending on the type of mix and the placement method used, up to 20% of the total volume of the placed form can be entrapped air.


In the face of these issues, concrete vibration solutions have been developed as methods of removing air pockets from poured concrete. By simply vibrating a poured concrete mix, entrapped air can be displaced and forced to the surface, expelling it from the mix. While it is impossible to remove all entrapped air from a form, vibration can remove the majority of the air and displace any large air bubbles, resolving the issues mentioned above.

External vibrators are attached to the outside of the form while internal vibrators are inserted directly into the concrete mix. Both vibrators work in essentially the same way by vibrating the concrete, but the source point and results of each vibrator type differ:

When it comes to proper concrete vibration, choosing the best vibrator for your application is critical. Some factors to consider when choosing the best vibrators for concrete form vibration applications include:

Since 1980, Deca Vibrator has been providing quality material flow solutions for a variety of industries. We are recognized nationally and internationally for our experience and extensive knowledge in the field of industrial vibrators, serving clients across 6 continents.

Whether you need pneumatic or electric, internal or external vibrators, we have a range of options to meet your needs. Contact us today to learn more about our concrete vibrator options and how we can help you with your next construction project.

Consolidating concrete in-situ or precast elements, as well as separating or loosening material are among the many applications for an external vibrator. At Wacker Neuson, we offer a wide selection of powerful external vibrators with various speed and operating voltage versions. Our asynchronous motor with stable speed ensures quality concrete results. Wacker Neuson also offers the right fastening system, so that everything can be safely attached.

External vibrator for concrete.Complete range of single-phase and three-phase external vibrators from 60 to 1.500 kg.Eccectric weights with easy and precise adjustment.High resistance aluminium housing.High load capacity bearings, lubricated with special "long-life" greases.Electrical motors manufactured with low loss lamination core to increase the efficiency and reduce the temperature.

VE external concrete vibrator. Complete range of external vibrators from 100kg to 1600kg. Differing drive systems are available such as: monophase, triphase, low-voltage and battery powered. The eccentrics for the VE are adjustable in order to meet the requirements of the job and come with a highly resistant housing.

The complete range of external vibrators have been designed specifically for formwork/shuttering using the one of the available drive systems and a frequency of either 3000rpm or 6000rpm. Clamps are available for several job types.

High-Cycle Vibrators are designed for use in low slump concrete where consistent power is needed to liquefy and move a stiff mix into corners and around rebar, or for any job where extended length vibrators are required.

The operator-friendly clamping system for different types of formworks allows quick assemblies without the need for special tools. The whole system is well balanced and easy to manage for maximum operator comfort.Heavy-duty and rugged external vibrator and fastening system reduces wear.The vibration-proof class H stator windings are wrapped and embedded in synthetic material for reliability. They will withstand a short-term load of up to 180C ( 356 F)The high power motor guarantees constant speeds even under the most difficult working conditions.

Afinitas offers a wide range of of electrical external vibrators, and our HawkeyePedershaab Parts Team is available to help you find the right solution to ensure proper compaction of your concrete products. Choose between low or high frequency external vibrators, mobile or permanent installation, synchronized solutions, and almost any voltage or DC (direct current) operated vibrators.

Low frequency industrial vibrators generate large amplitudes combined with small, medium to very high forces. Since they can be connected directly to the main power supply (50 or 60 Hz) they do not require a frequency converter or control. That makes them useful for a wide range of applications in all industries.

The ICF vibrator is a hand-held tool, which consists of a vibrator mounted on an aluminum board. After the concrete is poured in the form, the tool is then applied to the outside of the insulated concrete form. The application technique is started at the bottom of the form and moves in an upward motion. From the outside, the tool vibrates the concrete inside the form to allow air to float up and out of the concrete, creating a consolidated, compacted structure.

Vibration is one of the methods used to consolidate poured concrete to achieve required density and, subsequently, the designated concrete strength. Vibrators (internal and external or shutter vibrator) need to be used properly and skillfully; otherwise, the concrete may get over vibrated or under vibrated; compromising the concrete quality in both cases.

It is very important to understand why proper vibrating of concrete is essential. Some reasons include increased strength and a better finish. Likewise, improper vibrating practices are both costly and dangerous.

The most common process of vibrating concrete relies on a skilled operator using an internal concrete vibrator, commonly called a pencil vibrator (as well as some NSFW - Not Safe For Work - names). There are numerous applications that require portable internal concrete vibrators due to proximity or access. There are also many instances where an internal concrete vibrator cannot be used, including when the internal steel or mesh reinforcement leaves little room for the vibrating head.

A terrific alternative is the use of external form vibrators. An external form vibrator is mounted to the outside of the form, either permanently or portably. External form vibrators are most typically powered by electricity or compressed air but there are hydraulic vibrators available as well.

As I stated earlier, internal concrete vibrators require a skilled operator. I always like to say, they require a skilled operator that is having a good day. Not an operator who might be hungover, sick, or who actually shows up for work that day!

They are attached to the formwork and already through the vibration of the formwork structures, concrete is compacted. Connect to the compressor and work by forcing air flow. Comfortable for teams working with pneumatic equipment. Used in bridge, road construction, as well as factories for the production of concrete products.

The handy held vibrator is a small, powerful concrete vibrator consisting of a vibrating unit connected directly to a motor. Suited mainly for secondary concrete products, along with stone masonry, test piece manufacture, and the like. Equipped with a robust double-insulated sealed motor made of die-cast aluminum, the unit weighs about 5 kg, being lightweight, coming in a wide variety of models. This makes the series of handy vibrators very easy to use on a wide range of worksites. The models available are the lightweight, user-friendly EKCA and the powerful EKD.

The handy held vibrator series of motor cases are made of lightweight, strong die-cast aluminum. Robustly designed to meet the particular worksite operating conditions, these vibrators can be used with peace of mind.

On worksites with handy held vibrators, concrete mortar adherents close up much of the air suction and exhaust ports of the motor. Removal of hardened mortar is also hard to perform. The suction port cover and bearing case are therefore coated with fluororesin to enable the concrete to be easily cleaned, resulting in higher maintainability.

Handy hard shaft, handy punches, handy scrapers, handy wall concreting, and handy tamper series are equipped with rubber dampers having damping performance that meets the particular uses. This makes this series of vibrators easy on the worker's hands and user-friendly.

The handy held vibrator series of vibrators control motor noise, thereby being easy on the worksite environment. The exhaust sound from the cooling fin of the series of motors running fast is controlled as far as possible by specially shaping the cooling fin and exhaust port.(5 dB down from our earlier models)

On worksites with handy held vibrators in severe dusty operating environments, it is also much feared that some fine aggregate from the dry concrete mortar may go into the motor. The suction port of the motor is therefore equipped with a dual filter. The filter is employed to minimize the incidence of the motor from accidentally being locked in revolution due to the ingress of small pebbles or something similar.

Why do we use concrete vibrators in concrete forms?Because it forces concrete to flow everywhere in a form, increases the density and the concrete strength by removing the majority of entrapped air

What is the difference between internal and external vibrators?Internal vibrators have a snakelike shape and are introduced into the concrete.External vibrators are mounted on the outside of a form.They densify and force concrete to flow everywhere regardless the amount of rebar. 041b061a72


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