Table 1: Predicted and observed times to cracking on concrete cover surface.

Specimen numberSteel rebar diameter (mm)Cover thickness (mm)Corrosion rate (μA/cm2)Predicted time (year)Observed time* (year)

S116482.331.831.84
S216701.793.443.54
S316273.750.400.72
S412521.802.202.38

E x p e r i m e n t a l data from Liu and Weyers [8].