The process of vibrating the concrete is an important step in creating a strong and durable concrete structure. It eliminates air pockets and settles the concrete into a more uniform consistency. There are many different types of internal vibrators, ranging from small battery-powered wands to much larger plug-in versions that can be used on deep pours.
In general, an internal concrete vibrator works by jamming a probe-like device into the wet concrete and then slowly withdrawing it, creating a series of vibrations that help to remove the air pockets. In order to get the best results, it is recommended that the tip be withdrawn at a rate of no more than 3 inches per second.
This method of vibrating is very effective, but it can also lead to some problems. One common problem is the formation of a large gap in the concrete. This can be caused by over-vibrating, which causes concrete to segregate. In addition, improperly placing the vibrator can cause damage to the formwork.
To prevent these problems, it is best to follow the following steps:
1. Maintain a 7-10 cm distance between the edge of the vibrator and the formwork.
2. Make sure that the area you are vibrating has not been previously vibrated by another worker.
3. The vibrator should be inserted vertically into the wet concrete and then withdrawn slowly.
4. The tip of the device should be inserted about 3 inches into the previous layer.
5. The vibration duration should be no more than 3 seconds.
6. If a wall is poured in multiple lifts, the vibrator tip should be inserted deep enough to penetrate about 3 to 6 inches into the previous layer.
A concrete vibrator is a powerful tool that can be used to improve the strength and durability of any concrete structure. It is especially effective when it is used to reduce the number of air pockets in the concrete.
The most common type of concrete vibrator is the internal variety. They are easy to operate and can be handled by a single worker.
This type of vibrator can be used on a wide range of projects, including walls, floors and roofs. It is also a great choice for unique locations such as curbing and gutters.
There are two main types of internal concrete vibrators, electric and gas. The latter is a good choice for locations where electricity is either not available or presents a safety hazard on the job site.
This type of concrete vibrator can be easily operated and is ideal for small-scale projects and confined areas where electricity is not an option. It can also be used to reduce the amount of concrete poured in certain locations such as gutters, curbs and construction joints.