Concrete Vibrators

Concrete may look solid at first glance, but its true quality is determined by details that are not visible. Air bubbles, voids or poorly compacted mix can weaken the foundation, floor, ceiling and even the concrete ring beam. This is precisely why a concrete vibrator is used during concreting. In other words, a device that helps the fresh concrete mix settle better, fill the space around the reinforcement and create a more compact structure.

In this category, you will find electric concrete vibrators, petrol concrete vibrators, sets with hoses, and separate hoses for concrete vibrators. They are ideal if you are concreting foundations, columns, ring beams, ceilings, floors, formwork or smaller building structures where you want to achieve a firmer and more uniform result without unnecessary air pockets.

Help with choosing

Important factors to consider when choosing include where you will be using the machine, the volume of concrete you are working with, whether you have access to electricity, and the depth or width of the structure you need to compact. Before making your choice, therefore, answer a few practical questions:

• Will you be concreting smaller domestic areas or a larger construction site? 
• Do you have access to a power socket on site? 
• Do you need a standalone motor or a set with a hose? 
• How long does the hose need to be so that you can comfortably reach the entire structure? 
• What diameter of vibrating head is suitable for your formwork and reinforcement? 
• Will you be using the vibrator occasionally or regularly? 

What type of concrete vibrator do you need?

Whether you’re looking for an electric, petrol-powered or ready-to-use set, or for larger construction sites a petrol-powered concrete vibrator – which you’ll particularly appreciate where you don’t want to be dependent on the mains supply – take a closer look at what each one is used for: 

Tip from us

When compacting concrete, it is not true that the longer you vibrate, the better. The aim is to remove air bubbles and help the mix settle. Not to ‘over-vibrate’ it unnecessarily. When should you stop vibrating the concrete? When larger bubbles stop appearing on the surface and the concrete spreads nicely around the reinforcement, it is usually time to move the vibrator on.

Electric concrete vibrator or petrol-powered vibrator?

The most common choice for general construction work is an electric concrete vibrator. It is practical, affordable and suitable for both domestic and professional use. All you need is access to a power supply and the right hose. 

A petrol concrete vibrator is particularly suitable where you need greater mobility or are working away from the mains supply. Customers sometimes refer to it as a combustion engine concrete vibrator, as it operates with an engine unit and is practical for larger-scale construction work.

Immersion concrete vibrator

It is inserted directly into the fresh concrete mix. This allows it to work where it is most needed – inside the structure. It helps remove air bubbles, improve the cohesion of the concrete and fill the space around the steel reinforcement. Use it gradually, in individual sections. Do not force it into the reinforcement and do not leave it in one place for too long. 

How to choose a hose and a concrete vibrator?

The hose determines where you can reach and how comfortable your work will be. Shorter hoses are practical for smaller jobs, such as concreting around a house. Longer hoses are suitable for deeper foundations, larger formwork, or where you need a greater reach.

The most common mistakes when vibrating concrete

Even agood concrete vibrator needs to be used correctly. The most common mistakes occur when the concrete is vibrated for too short a time, too long, or in the wrong places. Therefore, try to avoid these mistakes in particular:

• vibrating only on the surface without immersing the head in the mix, 
• pulling the head out too quickly, 
• vibrating for too long in one spot, 
• using a hose that is too short, 
• using a head that is too large in narrow formwork, 
• vibrating concrete that has already started to set. 

A good result is not about force, but about consistency. It is better to work systematically in smaller sections than to try to compact a large area all at once.

FAQ

How long should you vibrate the concrete?

Vibrate the concrete only until larger air bubbles stop being released and the mixture visibly settles. The exact time depends on the consistency of the concrete, the type of structure and the power of the vibrator. It is important not to stay in one place for too long to avoid unwanted segregation of the mixture.

Can a concrete vibrator also be used when pouring a floor?

Yes, a concrete vibrator can also be used when pouring a floor, especially if it is a thicker layer or a larger area. It helps the mixture settle better and reduces the formation of voids. However, with thinner layers, work carefully and choose an appropriate method of compaction.

What happens if I don’t vibrate the concrete?

If you do not vibrate the concrete, air voids may remain in it, which can negatively affect the strength, appearance and service life of the concrete structure. For load-bearing and critical elements, therefore, the importance of concrete compaction should not be underestimated