we live in a world of unhinged superlatives, its a lost cause trying to be exact, anywhere outside of actual engineering,and I bet you would eat MY socks, to get a look at something that could plausably increase YOUR self healing, definitions and terms be damned,right,:)
30% is a massive and if true, unprecidented increase in life span for a road surfacing material, and would have profound positive impacts on not just civil engineering, but knock on benifts, for ecological and climate issues