PEDD Pavement Evaluation Software for Roads and Airports: Timely infrastructure maintenance management requires nondestructive evaluation (NDE) for structural integrity assessment. This is explained in the following video interview of Dr. Waheed Uddin for road pavement assets (video credit: Omar Uddin, UVision).
FWD-Mvc-030v Falling Weight Deflectometer in operation
Pavement NDE software PEDD (Pavement Evaluation Based on Dynamic Deflections) is an enhanced user interface version of Dr. Uddin’s PEDD1 methodology that has been used for over 25 years in the U.S. and many countries. Peak deflection data from Falling Weight Deflectometer (FWD) and Dynaflect are analyzed for in situ material characterization and structural capacity analysis. The results are used for assessing structural strengthening needs and implementing pavement maintenance and rehabilitation interventions.
Variability in layer thickness of the top layer is a source of uncertainty in the modulus results using any backcalculation software. The PEDD program can accommodate thickness of top two layers easily for each test station in the input data file if these layer thickness data are available from ground penetrating radar (GPR) survey.
Dr. Uddin’s Notes: The results of PEDD methodology and verification have been published in my scholarly papers.
PEDD’s in situ modulus results and nonlinear modulus values were verified in numerous studies, both with independent laboratory test results and simulation results from three dimensional-finite element (3D-FE) pavement modeling.
The animated video of the following FWD testing simulation example is for Kaneohe airfield in Hawaii.