When it is needed
When a dispute concerns composition, thickness, compaction or other concealed-layer properties.
What we examine
- Pavement samples
- Base and pavement layers
- Laboratory reports
Materials to prepare
- Designed pavement construction
- Material documents
- Sampling records
- Reports and point diagrams
Sample questions
- Do the samples correspond to the stated section and layer?
- Which characteristics were established through testing?
- Are the results consistent with design requirements?
- Is the sampling plan sufficient for the question asked?
- How do the deviations identified relate to the observed defects?
How the work is carried out
- Preparing the sampling programme
- Agreed sampling and testing
- Analysis of results in the asset's context
Result
A report with a traceable connection between sampling points, test reports and findings on the characteristics checked.
What affects the conclusions
Laboratory work is performed by an agreed specialist provider. An individual sample does not represent the entire road without justification.
Frequently asked questions
Can I bring my own core?
The sample supplied can be examined, but its provenance and the boundaries of findings need support.
Will sampling locations be reinstated?
Access, approvals and pavement reinstatement arrangements are determined before work starts.