[Zeke]

Yeah, I was thinking more of a crusher rather than a pounder. They did the pounding thing on a long section of freeway here 20 years ago. Since the road base was pretty good to start with, damage to the actual surface was not all that bad. I think they grooved it beforehand. Not sure how they cleaned it before placing new concrete over, or maybe they didn't. Or maybe they scored the uneven surface.

I wish I had paid more attention.

Many years ago a relative asked me about investing in an onsite soil cleaning operation. The method was to dig the site and bake the soil on site in a huge oven. I passed. I don't think that ever went anywhere.

IDK what that has to do with this, but I thought I'd share it.