Hamm is now enabling smart compaction to a specified target value in earthworks via the 20 tonne and 25 tonne HC 200i C VA and HC 250i C VA compactors.
VA stands for Variable Amplitude. An important component of the tech is the new parameter-independent Smart Compaction Value (SCV).
With the smart compaction product family, Hamm has developed an entire range of solutions for intelligent compaction. A further step forward that automates and simplifies compaction in earthworks and simultaneously improves quality and cost-efficiency has now been implemented in the new HC series models with VA drums. The new compactors follow the launch of smart compact for asphalt construction in 2022.
Operators can quickly and easily learn how automatic compaction works, as the compactor operator is only required to select an automatic mode or a manual mode.
While the amplitude is automatically regulated by the machine control system in automatic mode, manual mode allows the compactor driver to choose any one of five preset amplitudes. The process is operated via the Easy Drive display. In addition, a compaction target value in MN/m2 based on typical load bearing capacity values can be specified before beginning compaction.Â
Smart Compaction Value
In automatic mode, the compaction process is controlled by Smart Compact until the target value is achieved. The decisive factor here is the Smart Compaction Value (SCV). The measurement is performed by the Smart Compaction metre (SCM).
The compaction value is also independent from key influencing factors such as the travel speed, the direction of travel or the frequency, which leads to high comparability of the measured values, even when using different weight classes.
The use of the new VA compactors brings a number of advantages for operators and construction contractors. For example, the automatic compaction control not only ensures homogeneous compaction results, but also simultaneously and effectively prevents over-compaction or particle crushing.
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The VA compactors make it possible to achieve consistently high process reliability and quality. The cost-efficiency of construction projects is also improved through the reduction of the number of compaction passes required, the consequently lower diesel fuel consumption and less mechanical loads on the machine.
The smaller number of passes required is accompanied by a corresponding reduction in emissions. Moreover, the reliable avoidance of jump operations caused by the machine control system leads to longer machine life. In view of the direct adjustment of the amplitude, the new technology can be classed as an energy-efficient overall system.
High centrifugal forces
For potential applications, the new compactors are suitable for the compaction of cohesive, sandy and coarse soils. Thanks to the high compaction forces, the VA compactors are also effective for compacting thicker layers of rubble, as the number of passes required for this is also reduced. This makes the machines a particularly versatile option for a variety of applications.
The VA models will initially be available in markets with Stage V and Tier 4 Final exhaust emission standards.
