Concrete compaction is one of the most important tasks during a construction. A concrete vibrator is used to consolidate the concrete and reduce void and air pockets that could potentially compromise the structural integrity of the construction.
For different types of jobs, there are different types of concrete vibrators. The type of vibrator you choose for each job depends on a variety of factors, including the type of structure and environment.
You should also consider the size, frequency, and power of the vibrator. Using one that is too powerful for the specific job can lead to excessive vibration, which causes blowouts and huge walls.
The following are the four most common types of concrete vibrators:
Also called internal concrete vibrators, these are used most commonly for most types of concrete consolidation jobs. Immersion vibrators have a steel tube with a closed and round tip connected to an electric motor. The most basic ones have a frequency of 3,000 to 6,000 rpm, but the high-end models can go up to 15,000 rpm.
More commonly known as external concrete vibrators, shutter vibrators are attached to the formwork so that they vibrate both the form and the concrete. This means shutter vibrators use up more power than other vibrators. External vibrators are typically used in casting yard and precasting facilities, Powerpac Group explains.
Surface vibrators are positioned over the poured concrete, which makes them useful for consolidating concrete in shallow slabs. They’re also recommended for concrete that has a low water-to-cement ratio. But, surface vibrators aren’t advised for jobs that use large volumes of concrete because the lower layers won’t be vibrated adequately.
Rebar shakers are a good alternative to concrete vibrators. They are placed above the reinforcing bar and transmits the “shaking” to the concrete. Rebar shakers can save a lot of time and effort, while also reducing the need for cleanup. They are best used for pouring concrete into small spaces.
Because concrete consolidation is a vital aspect of construction, it is important to choose the right tool for each application. It is always best to do your research before investing in a concrete vibrator that suits your specific needs.