Carl Bro

Carl Bro

zip fileCycle 1 East to West 19 to 1
zip fileCycle 1 East to West 33 to 20
zip fileCycle 1 West to East 1 to 19
zip fileCycle 1 West to East 20 to 33
zip fileCycle 2 East to West
zip fileCycle 2 West to East

 

Vehicle Specification

Carl Bro brought in their own SHWD 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 5.91 inches.  Carl Bro followed a different sequence for testing requiring a change in the buffer system on the equipment for higher loads.  First, Carl Bro tested Cycles 1 and 2 using a seating drop followed by a 13.5k and 26k lbs load.  Second, after changing the buffer system of the SHWD, Carl Bro tested Cycles 1 and 2 using a seating drop followed by a 42k and 60k lbs load.  Finally, given the capability of the equipment and available time for testing, Carl Bro tested Cycle 2 again using a seating drop followed by a 70k lbs load.  Data from the seating drops were not collected along with the test drops.  The Carl Bro has 18 sensors measuring deflections.  1 sensor is positioned at the center of the plate, 1 sensor is positioned 12' behind the plate, with the remaining sensors positioned in front of the plate in the direction of travel.  The remaining sensor spacing is as follows: 8', 12', 16', 20', 24', 30', 36', 42', 48', 54', 60', 66', 72', 78', 86', and 96'.  This vehicle was operated without a towing vehicle and was instead pushed.

 

Testing 

Testing of Cycle 1 and Cycle 2 with the Carl Bro was performed on 11-04-2010.  Instrumentation embedded within the pavement also acquired data during testing.  The Carl Bro deflection data was collected in several file formats.  Data was collected in a .txt format using both imperial and metric units for two file formats.  Data was also collected in pddx format using both imperial and metric units for two file formats.  Finally, in one case, a file was provided in .fwd file format instead of pddx.  All file formats are readable in Notepad and are available for download.