Alternative formats of master curve

The MEPDG master curve for asphalt materials may also be written on a simpler format as:

Alternative format of master curve.

With this format trref may be used to shift the master curve left or right and γ’ may be used to change the slope of the curve. For tr = trref one has log(E) = δ + α/2.

The master curve may also be written on the format:

Second alternative format of master curve.

Where A, VTS and TK are defined in the equation for binder viscosity, and TKref is the reference temperature in ºK.