Comment by maicro

I like your general comment (nothing against the others of course, but your point about engineering trade-offs is always important to keep in mind), so I'll throw this note here:

As far as I understand it, asphalt is also highly recyclable. https://www.researchgate.net/publication/344252166_Asphalt_P... , referenced from the Wikipedia page about "Asphalt concrete" (https://en.wikipedia.org/wiki/Asphalt_concrete ), includes this quote in the abstract:

"The asphalt industry remains the country’s most diligent recycler with more than 99 percent of reclaimed asphalt pavement being put back to use."