Thanks to oscillation, the tandem roller achieves final compaction in only four passes
The Hamm HD 148i VO tandem roller also stands for high performance. With a drum width of 2,140 mm and an operating weight of 14 t, the roller achieves the high area performance that was also required on the construction site in Shanxi. The use of the dynamic compaction systems vibration and oscillation – indicated by the VO in the model name – ensures high efficiency, as the compaction progress rapidly increases.
On the construction site in Shanxi, the tandem roller compacted the surface layer at a speed of 5 to 5.7 km/h and with activated oscillation. This technology makes it possible to achieve the required degree of compaction in only a few passes. Oscillation is therefore also particularly advantageous in the case of lower asphalt and ambient temperatures. Developed by Hamm, the technology achieves scientifically verifiable homogeneous, and high-quality compaction results. This was also confirmed by the HD 148i VO, on which the oscillation frequency was set to 35 Hz and the vibration frequency to 60 Hz. This enabled the roller driver to achieve the specified degree of final compaction of 99% after only four passes.
HAMMTRONIC also contributed to the efficiency and quality of the construction project. The HAMMTRONIC electronic machine management system monitors all engine and driving functions and automatically adjusts the travel drive, the vibration or oscillation drive, and the engine speed to the momentary operating conditions. This reduces fuel consumption as well as exhaust gas and noise emissions. HAMMTRONIC therefore contributes to the responsible handling of resources.
In combination with the exhaust gas after-treatment of the Hamm HD 148i VO tandem roller, the engine of the HD 148i VO fulfills all requirements of the Chinese MEE4 exhaust emission standard.