Hamm has announced the launch of two new HD+ tandem rollers for asphalt projects. Both models are powered by a 115 kW (154 hp) Deutz engine and are capable of compacting with a choice of vibration or oscillation.
While the HD+ 120i V-VIO 12 t tandem roller features a vibrating roller drum (50 Hz or 3,000 vpm) at the front and a VIO drum at the rear, the HD+ 120i VIO-2 HF provides additional application options with two VIO drums. For construction site applications, an automatic control feature on the HD+ 120i VIO-2 HF ensures that the front drum (in relation to the direction of travel) is always working in vibration mode, while oscillation or static compaction is used on the rear drum to achieve the best possible results.
When it comes to compaction force, the new models offer performance that operators have come to expect from the brand. Specially for the North American market, the HD+ 120i VIO-2 HF has also been designed as a high-frequency machine (HF), offering a vibration frequency of 67 Hz or 4,020 vpm (front and rear).
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Fast Compaction
A supporting feature is the ability to switch between vibration and oscillation or, in the case of the HD+ 120i VIO-2 HF, to combine two vibration and oscillation drums together, removing the need to switch machines or deploy an additional machine and another operator on the construction site. This multifunctionality also pays off in terms of the many new types of asphalt mixture. All in all, the HD+ 120i VIO-2 HF offers nine different combinations when selecting the compaction method.
As with earthworks, the combination of vibration and oscillation delivers fast compaction in fewer double passes, making it particularly well suited to final compaction. A high compaction quality is still guaranteed even at increased working speeds.
Hamm HD+ VIO Drum.
Cab and Operation
The tandem rollers include a spacious and clear-view driver's cab, the Easy Drive operating concept and various interfaces to connect telematics systems, fleet management systems and digital applications for controlling and documenting compaction.
Operators can also make full use of oscillation features and apply these to the compaction of joints or compaction in vibration-sensitive areas. Oscillation also facilitates deployment at low outside temperatures, since a larger temperature range can be used. Plus, the system prevents particle crushing and over-compaction.
Oscillation is also ideal when compacting distortion-sensitive materials. It reduces noise emissions and vibrations experienced on and around the construction site.
Like the other oscillation drums from Hamm, the new VIO drums require no maintenance, thanks to the wear-resistant steel and temperature-resistant special belt.
