MOOSER Pneumatic External Vibrator (Made in Germany)
The MOOSER VR Series External Pneumatic Vibrator is a type of concrete vibrator used in construction to consolidate freshly poured concrete and remove air pockets. It operates using compressed air, which drives a vibrating head attached to the outside of the concrete formwork. This creates vibration in the wet concrete mixture, helping to settle the mixture and distribute the aggregates evenly, resulting in a dense and homogeneous final product.
Application of Mooser Pneumatic VR Series External VibratorsA steel formwork carriage was used for creating the inner shell. The concrete is compacted by means of a Mooser compressed air vibrator from the new VR series. The formwork vibrators are attached directly to the receiving plates on the sheathing of the steel formwork carriage and in this way cater for direct transfer of force onto the concrete. Optimal compaction depths of 50 cm and more (depending on the concrete consistency and formwork design) have been revealed thanks to sampling borings.
The compressed air unit with rapid start-up acceleration swiftly penetrates the characteristic frequency range of each formwork and in this way avoids an excessively large dynamic strain on the formwork carriage. The individually compressed air vibrators are controlled centrally via a corresponding air control unit at each wall side. The vibrators are devised in such a way that these compressed air versions do not freeze up even during the cold winter.
The advantages of these almost maintenance-free compressed air vibrators are also taken advantage of for the cut-and-cover tunnel. The vibrators for the formwork carriage are also stationary and attached directly to the sheathing via the reception plates. The compaction concept foresees that the vibrators only operate at those points where concrete is actually being placed so that the formwork is not unnecessarily affected by the vibration energy. As a result, no more than 6 vibrators run simultaneously.
What is an external concrete vibrator?
External concrete vibrators attach, via a bracket or clamp system, to the concrete forms. There are a wide variety of external concrete vibrators available and some vibrator manufacturers have bracket or clamp systems designed to fit the major brands of concrete forms. External concrete vibrators are available in hydraulic, pneumatic or electric power.