Austroads – Calculate Asphalt Fatigue Constant (k) using Shell Equation

The following calculator outputs the asphalt fatigue constant (k) based on the the Shell Equation – see equation 25 on page 84 of AGPT02-17 Austroads Guide to Pavement Technology – Part 2 – Pavement Structural Design – December 2017.

Please note: the Calculator is valid for both Austroads 2004-12 and 2017 Design Methods.

The value of k is in the units used by CIRCLY: