SEISMIC is the intelligent technology that lets the roller determine the optimum frequency for any compacted material, monitoring the variations and constantly adjusting to the changing conditions automatically. With the frequency automatically optimized at all times, Dynapac SEISMIC will increase the productivity significantly as it requires less passes compared to conventional compaction carried out at fixed frequency. SESMIC will provide a significantly lower fuel consumption and reduce the Carbon footprint for completion of the compaction job.
  • Increase productivity by up to 40%
  • Up to 55% less fuel required to complete the job
  • Reduce carbon footprint by up to 55%
The system is a fully automatic frequency adjustment system, meaning easy to use with no additional training needed. No blind guesswork or manually adjustments of frequency. Simply get in and drive.
SEISMIC is a Sensor- and Algorithm-based innovation with a simplistic system architecture. That means benefits for the customer without the cost of mechanical complexity. By operating at the optimum drum frequency all the time it results in less wear and tear of the complete system including the mechanical and hydraulic components.
The critical components at the heart of the Seismic system are the on-board machine control unit and a next-generation compaction meter. This device has been designed to sense the dynamic characteristics of the material being compacted. In turn, this allows Seismic to calculate the optimum frequency required for the most optimal compaction. This is achieved using advanced data flow from the Seismic Compaction Meter to the on-board machine control unit, which controls the machine's hydraulics. This means that drum frequency can be changed hydraulically every 0.2 seconds to ensure that both compaction performance and energy efficiency are always maximized.
  • “Very easy to use” - Automatic intelligence - Simply get in and drive.
  • “Silent and comfortable - I can barely hear the noise from the vibrations”. Conventional compaction carried out at a fixed higher frequency produce higher perceived noise/vibration emissions, Seismic operates at lower frequencies. In many cases lower than what the human ear can perceive (20Hz).
  • “Wow - No bouncing” when operating the Seismic machine, you experience a reduced risk of over-compaction and tendency of “double jumping” (bouncing). The reason for this is – in natural frequency the machine operates in harmony with the soil.
  • Save time, money and increase productivity by up to 40% - due to proven and verified reduction of required number of passes
  • Up to 55% less fuel required to complete the job – proven and verified fuel consumption savings gives significant monetary savings, especially in times of high fuel prices
  • Reduce carbon footprint by up to 55% - projected savings of 28ton CO2 savings per year and machine
  • The lower operating frequency means a significant decrease in machine wear and tear
  • The lower operating frequency means a decrease in perceived noise levels
  • The surface loosening effect in granular materials that is a common problem for conventional compaction is more or less eliminated on granular soils, meaning that the static passes towards the end of the compaction process for “finish compaction” may be omitted
  • Reduced risk of over-compaction and tendency of “double jumping” (bouncing)
SEISMIC is available for our Soil rollers CA 1500-6500
Scientific articles, test results and reference below:
  • Wersäll, C., Nordfelt, I. & Larsson, S. (2020). Roller compaction of rock-fill with automatic frequency control. Proceedings of the Institution of Civil Engineers – Geotechnical Engineering, 173(4): 339–347
  • Wersäll, C., Nordfelt, I., & Larsson, S. (2018). Resonant roller compaction of gravel in full-scale tests. Transportation Geotechnics, 14, 93-97.
  • Wersäll, C., Nordfelt, I. & Larsson, S., (2017). Soil compaction by vibratory roller with variable frequency, Géotechnique, Vol. 67, No. 3, pp. 272-278.
  • Wersäll, C., Larsson, S., Rydén, N. & Nordfelt, I., (2015). Frequency Variable Surface Compaction of Sand Using Rotating Mass Oscillators, Geotechnical Testing Journal, Vol. 38, No. 2, 2015, pp. 1–10, doi:10.1520/GTJ20130193. ISSN 0149-6115
  • Wersäll, C. & Larsson, S. (2013), Small-Scale Testing of Frequency-Dependent Compaction of Sand Using a Vertically Vibrating Plate, Geotechnical Testing Journal, Vol. 36, No. 3, pp. 1-10, doi:10.1520/GTJ20120183. ISSN 0149-6115.
  • Arvidsson, H., Bjurström, H. (2022), Measuring of fuel consumption on Dynapac-roller, monitored by VTI (The Swedish National Road and Transport Research Institute). VTI test report nr. 22-002