ARA Dynatest
Vehicle Specification
ARA used a Dynatest HWD testing vehicle at the Round-Up. The following outlines many of the vehicle parameters during the testing of the Round-Up pavement. The plate is a 4-segmented plate with a radius of 5.90 inches. The drop sequence followed the recommended testing load levels for a HWD vehicle. Data from the seating drop was not collected along with the test drops. As such, an unknown seating drop load was followed by 12k, 24k, and 36k lbs test drops. The Dynatest has 9 sensors measuring deflections. 1 sensor is positioned at the center of the plate, 1 sensor is positioned 12 inches in front of the plate along the path of the vehicle, one sensor is positioned 8 inches behind the plate, and the remaining six sensors are positioned behind the plate at 12" spacing. The vehicle is operator by a driver in the truck cabin and a spotter outside the vehicle for positioning of the plate.
Testing
Testing of Cycle 1 and Cycle 2 with the ARA Dynatest was performed on 10-19-2010. Instrumentation embedded within the pavement also acquired data during testing. The Dynatest deflection data was collected in several file formats: five .f25 files readable in Notepad, five .pddx files readable in Notepad, and 5 .mdb files readable in Microsoft Access. All file formats are available for download.