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Ah concrete highways! A miracle of lobbying over science. thump-thump, thump-thump, thump-thump (expansion joints).
There’s a road near my home that used to be US 52. It’s four lanes wide. It’s paved in asphalt today. In the winter the asphalt buckles a little at regular intervals. It makes for a very bumpy ride. I’m all but certain that a concrete highway lurks beneath the asphalt and the differing expansion/contraction properties of the two materials creates the buckling.
If properly designed, built and maintained, concrete roadways can stay in excellent shape for many decades.
It’s that last one, maintained, that trips up so many concrete roads!
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