Jul 14, 2022

Roads built with recycled rubber tires could last twice as long

Posted by in category: materials

Unlike much outdoor infrastructure, roads are not designed with any sun protection, making them prone to cracking and potentially unsafe to drive on.

Now, RMIT University engineers collaborated with Tyre Stewardship Australia (TSA) to discover the perfect blend that is both UV resistant and withstands traffic loads, with the potential to save governments millions on road maintenance annually. Their new research has found that crumb rubber, which is recycled from scrap tires, acts like sunscreen for roads and halves the rate of sun damage when mixed with bitumen.

Crumb rubber has already shown promise in making concrete stronger and more heat resistant. The new study found that the material acts so effectively as a sunscreen for roads that it actually makes the surface last twice as long as regular bitumen.

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