Release of New AASHTOWare Pavement ME DesignTM Backcalculation Tool

August 22, 2017

The new Pavement ME Deflection Data Analysis and Backcalculation Tool (BcT) Version 1.0, supplements the rehabilitation design module of AASHTOWare Pavement ME Design software (Pavement ME).

Features and Capabilities

Pavement ME Deflection Data Analysis and Backcalculation Tool (BcT) is a standalone software program that can be used to generate backcalculation inputs to the AASHTO Pavement ME Design software for rehabilitation design. BcT helps users to:

  • Analyze raw deflection data files obtained from Falling Weight Deflectometer (FWD) testing devices.
  • Backcalculate in-place elastic layer moduli for flexible and rigid pavements.
  • Generate inputs that feed into Pavement ME rehabilitation design models.
  • Perform loss of support analysis and load transfer efficiency (LTE) calculations.

BcT utilizes EVERCALC® backcalculation engine, and broadly comprises the following three phases:

  1. Pre-processing:
    Allows the user to (a) import and pre-process raw deflection data file formats from three FWD testing devices: Dynatest, JILS and KUAB; (b) segment projects, compare project segments, and merge statistically similar segments; and (c) select project segments for backcalculation.
  2. Backcalculation:
    Allows the user to (a) define pavement layer structure and other backcalculation inputs; and (b) backcalculate elastic layer moduli for every segment with the pavement layer structure.
  3. Post-processing:
    Allows the user to export backcalculation results to an Pavement ME rehabilitation design file.