The Circular Economy - Roads Can Be Recycled Forever, Why Don't More Cities Do It?
This Business Insider video clip suggests that asphalt is endlessly recyclable: however, regulations often limit the extent to which it can be recycled, with many having a 30% limit.
This clip looks at a company called Green Asphalt which claims that it can produce 100% recyclable asphalt and the clip details how it has convinced city authorities that it is able to manufacture recycled asphalt that functions every bit as well as the initial asphalt.
It's an example of a perfectly circular economy, and only relies upon having the paraffin and the energy to recycle it.
That said, recycling it does create some negative externalities in the form of 'blue smoke' - although Green Asphalt's manufacturing processes are being developed to account for this