Aashto Flexible Pavement Design Excel Spreadsheet Direct

To produce a spreadsheet for AASHTO 1993 flexible pavement design

1. ESAL Calculation: Computes $W_18$ using the formula: $$ W_18 = \fracADT \times %Trucks \times D_L \times D_D \times TF \times 365 \times [(1+r)^n - 1]r $$
2. SN Iteration: A cell containing the AASHTO equation rearranged to equal zero.

   4.5 No Layer Thickness Optimization

   Given required SN, a spreadsheet calculates thicknesses but does not optimize cost (e.g., thicker base vs. thicker asphalt). Engineers must manually iterate. aashto flexible pavement design excel spreadsheet

   Step 2: Calculate Z_R and ΔPSI

   In cells: