I have used my excavator on heavy ice to break it up in the corners or steep sections. I have tried a box blade with scarifiers, but it was not heavy enough. I have tried the toothed bar on my bucket and it was not heavy enough. This year I have a power rake available and will try that. I have hear they work very well. I may also change from the manufactured sand/salt mix (which does work well) to a larger grit manufactured sand/salt mix. There is enough salt to take on the ice, but not bother my gravel driveway.
Mike