Chapter 4, Part 3 of the MEPDG (Mechanistic Empirical Pavement Design Guide) states
"The 'effective' dynamic k-value represents the compressibility of all pavement layers beneath the PCC slab and base course".
However, the Manual of Practice for the MEPDG states
"The effective k-value, therefore, essentially represents the compressibility of underlying layers (i.e. unbound base, subbase, and subgrade layers) upon which the upper bound layers and existing HMA or PCC layers are constructed."
I find these two definitions contradictory in regards of the inclusion or not of the base layer in the k-value estimation.
I have two questions:
1) Does the k-value represents all layers beneath the PCC slab or only all layers beneath the PCC slab and base?
2) Is the static backcalculated k-value from the FWD data the value I should enter directly as input in the Rigid Pavement Rehabilitation analysis in Pavement ME Design?