Impact rolling
A towed polygonal roller travels across a planned route and transfers repeated loading through its rolling action.
Impact compaction explained
Use this guide to make the project discussion more precise.
Impact compaction is a general term for methods that transfer repeated dynamic loading into the ground through impact equipment. The relevant CMG equipment discussion starts with material, work area, access, available power unit and acceptance requirements.
This page explains the terminology without turning a method description into a universal performance claim.
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Guide contents
Questions a technical buyer should resolve before selection.
Rapid Impact Compaction
RIC uses a hydraulic impact arrangement and is reviewed with carrier, work-zone and access requirements.
Selection boundary
Method choice depends on ground information, project objective, available equipment and the following construction activity.
Verification
Machine activity supports the work history; project-defined inspection or testing determines acceptance.
Evidence boundary
A useful guide is clear about what it does not prove.
CMG uses this resource to organise a project conversation. It does not replace site investigation, geotechnical design, equipment documentation or the project acceptance specification.
- Do not choose a method from a label alone.
- Do not publish treatment depth or productivity without project evidence.
- Keep equipment discussion separate from final geotechnical acceptance.
Buyer checklist
Prepare these inputs before sending an RFQ.
- Material and moisture condition
- Work area and access constraints
- Available tow or carrier equipment
- Project objective and follow-on works
- Acceptance and documentation route
Decision record
Turn the research question into a reviewable equipment brief.
Use the following record as a handover between procurement, site engineering and the equipment supplier. Empty fields are signals to investigate, not assumptions to fill with a generic machine claim.
Inputs to evidence
- Material and moisture condition
- Work area and access constraints
- Available tow or carrier equipment
- Project objective and follow-on works
Decision to make
- Impact rolling
- Rapid Impact Compaction
- Selection boundary
Documents to request
- Source-matched model specification and configuration
- Operating and maintenance guidance for the quoted scope
- Project-specific verification and handover requirements
Related equipment
Move from the question to a CMG equipment review.
35kJ Impact Roller
High-energy polygonal roller for demanding subgrade and ground improvement projects.
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32kJ Impact Roller
A high-energy impact roller for embankment, subgrade and foundation treatment.
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30kJ Impact Roller
Balanced high-energy compaction for road base, fill and infrastructure construction.
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Video centre
Use video as context, not as unsupported proof.
Review available CMG equipment footage, then bring your project inputs to the technical discussion.
Visit the CMG video centreResource FAQ
Further questions for the project team.
What is impact compaction?
A category of ground-treatment methods that use repeated impact loading to densify or improve ground under project controls.
Is impact compaction always suitable?
No. Suitability depends on the actual ground, work area, access and project acceptance requirements.
What is the first RFQ input?
Material, moisture, work area, access, available equipment and acceptance route.
Does impact equipment prove ground improvement?
Only the project specification and acceptance process can establish the required outcome.