• Rolling Weight Deflectometer

United States and Europe have developed over the past several decades non-destructive tools which can continuously measure pavement deflection data at posted traffic speeds, known as Rolling Weight Deflectometer (RWD). The newest and under developing RWD is the Dynatest Rapid Pavement Tester (RPT), also called “Raptor”.
This study presents a documentation of the main current devices used to evaluate both functional and structural pavement condition and to provide data to Pavement Management Systems (PMSs).
A documentation of the most promising technologies implemented in continuous deflection measuring testing, such as ARA RWD, TSD, ARWD, the new Dynatest RPT and its prototype, comprising a description of components, technical, functioning, data processing and test results is exposed in this study.
In particular, results from Dynatest RPT repeatability and comparability analyses with the most widely accepted structural testing method in the market, the Falling Weight Deflectometer (FWD), performed on the data collected in the last several months on different asphalt pavements nearby Copenhagen, are shown in this elaboration.
These first results seem to show a consistent short-term repeatability between different runs of the Dynatest RPT prototype and good agreement with the FWD data collected on the same pavement in the same day.
The performance of this new continuous deflection testing device is expected to improve a lot over the comings months and is supposed to start offering high speed deflection measurements in 2018.