Part three of this series covers more technical aspects of optimal material compaction.
In this third instalment provided by Case, we look at high-frequency vibration, real-time operator feedback and automation.
- High-frequency vibration: Good advances in compaction technology have been achieved with the introduction of high-frequency rollers. Higher frequency ranges provide more control over compaction performance considering the thickness and density requirements of the lift. When used with variable amplitude settings, the machines can better handle thinner lifts (low amplitude/high frequency) and thicker lifts (high amplitude/low frequency). The centrifugal force can be adjusted to match the thickness of the lift and the desired depth of compaction. This fine tuning improves machine productivity and reduces the possibility of rework.
- Real-time feedback and operating instructions: Modern compaction equipment can provide the operator with recommended operating settings/conditions based on the feedback it gets from real-time conditions of the compacted material. This is based on desired stiffness settings. The desired stiffness is based on a benchmark pass that’s already met requirements. It lets the operator know within a range of where they should be operating as the compactor travels along. The display screen shows operators the speed they should be traveling as well as the level of vibration that should be set. The operator still controls all the adjustments, but the system provides them with operational guidelines. Measuring stiffness is said to be a better indicator than density.
- Automation features: Some modern compactors feature automation technology that will adjust the vibration of the drums automatically as it goes along. The operator only needs to control the steering and the speed at which they’re traveling. These systems are advanced and rely more heavily on electronics, so some manufacturers place these systems strictly into enclosed cab units to avoid dust and debris and protect the electronic components.