Ann: EdenCrete Project - US Update, page-19

I was aware of grinding or milling before this discussion, but what would be the cost of doing it for large sections of roadway?
OK I guess they wouldn't have to remove all o0f the existing concrete, which would be a saving, and they would get to reuse the aggregate in the mix wuith the EdedCrete added so another saving would be had and they would use less EdenCrete and Accellerator material in a 2" layer than in the whole thickness replacement?
it would be an interesting exercise to do a cost analysis on this, but like I said bonding may be an issue, it would have to be tested, I guess also in some instances they may just do a top over with the 2" possibly if that can be achieved?