Jul 11, 2022
A Quick Look at DPS Swerve vs Transverse Slice Measurements
This month’s toolbox tips look at quality control/quality assurance (QC/QA) and we begin with verifying and modifying roller patterns in the field. As we all know, achieving best compaction of the asphalt mat will directly affect the longevity of the pavement. The sooner a roller operator can get feedback on his or her rolling pattern success, the better.
When using the non-destructive density profiling system (DPS) to gather data, the QC/QA personnel will typically use one of two patterns immediately following the intermediate roller.
The swerve pattern sees the DPS scanner moving back and forth in a zig-zag pattern moving in the direction of construction—toward the paver. The transverse slice pattern sees the DPS scanner moving back and forth straight across the width of the lane at pre-determined intervals.
Data gathered and interpreted in real time from either method can help the QC/QA team determine areas of uniform density where the rolling pattern is adequate and areas of inadequate density where rolling patterns or paving practices may need adjustment.
Don’t forget to run the DPS along the longitudinal joint as well.
Do you have a colleague who could benefit from this tip?
Subscribe now to receive tips like this to your inbox each week!