KNOW-HOW

These rollers never miss a beat.

Oscillation

Oscillation is a method of dynamic compaction. The energy for compaction is generated by rotating eccentric masses, which cause the roller drums to oscillate. These oscillations are then transmitted into the ground to be compacted, causing the particles to re-arrange to a denser position.

Moment around the drum axle

Oscillation is based on two co-rotating masses generating a moment around the axle of the roller drum. One rotation of the masses by 180° causes the moment to change its effective direction, generating an oscillating movement of the drum. The roller drum maintains contact with the ground all the time, while tangential forces are transmitted into the ground.

Compaction energy hits the spot

Contrary to vibration, only about 15% of the vibrations created during oscillation compaction are given off to the environment. Oscillation compaction is therefore highly suitable for road construction work in sensitive areas like, for instance, bridges or park decks, along railway lines, in the vicinity of historical buildings, above supply lines or in other vibration-sensitive areas.

Flexible applications

The use of oscillation permits excellent compaction results to be achieved on pavements with layer thicknesses of up to 20 cm. With oscillation, the roller driver can always utilize the roller’s full power of compaction, as the method does not bear any risk of destroying the pavement through particle crushing.

Compaction of joints made easy

Oscillation compaction is also ideally suited for compacting the joints between newly paved and existing, cold asphalt surfaces, because oscillation prevents damage to the previously completed, compacted and cooled-down asphalt strip.

Compaction at the highest level

Oscillation rollers enable compaction to be achieved much faster than any other compaction method. Constant ground contact enables not only the dynamic forces but also static forces to have an effect on the asphalt or ground surface. Density thus increases much faster than with other methods. Excess compaction, which may result from an incorrect use of vibration rollers, is also prevented.

Oscillation turns rollers into all-rounders

The tandem rollers with oscillation are equipped with one oscillation and one vibration drum. Combining these two systems in one machine makes them suitable for all-round use. They are capable of compacting in sensitive areas and additionally offer the dynamic compaction properties of a vibration drum, which makes them ideally suited for universal application. Practical application has also shown that the combined use of both systems produces excellent compaction results in a very short period of time.