 Removal of this type is done in order to provide a good microfracture-free surface for bonding with new, sound concrete.Much like applying oil and chips to an asphalt road, this helps extend the useful life of the bridge decking and road surface by delaying the need for complete replacement.Another application for hydro scarification is for decontamination, as for example is planned to be used in the Chernobyl New Safe Confinement for the concrete of Unit 4 of the Chernobyl Nuclear Power Plant.