Bonding strength between concrete and steel as a function of f'c

[JGS]

Does anybody know how to estimate bonding strength between concrete and a sheet of steel? I think it is 0.2 times f'c, but I cannot find a good reference to confirm that.

Thanks

 

[Qshake]

Thats it. For a reference on this check out Handbook of Temporary Structures in Construction by Robert Ratay.

Or if you can get ahold of an old USS Steel Design of Sheet pile structures.