The CP Tech Center announced a new study on pavement overlay performance. “Automated Plate Load Testing on Concrete Pavement Overlays with Geotextile and Asphalt Interlayers: Poweshiek County Road V-18,” offers an assessment of the performance of unbonded concrete overlay sections applied in 2008–2009.

The  authors (David White and Peter Taylor) compare overlays constructed in 2008 to 2009 using an asphalt interlayer or a non-woven geotextile fabric interlayer. 

One of the findings was the concrete overlays placed over the geotextile exhibited lower permanent deformation than those placed over asphalt interlayer.

Click here to see the report.