Why your local road turns into a melting surface in summer
In short: Roads are engineered to withstand immense pressure, yet extreme heat can compromise their structural integrity. This video explains the chemistry of bitumen and how engineers balance material science with heavy traffic demands.
Asphalt functions as a composite material where crushed stones are held together by bitumen, a petroleum-based binder. When temperatures rise, this binder undergoes physical changes that make the surface more susceptible to deformation, such as ruts and tire marks from heavy trucks.
Engineers must design specialized asphalt mixtures to counteract these effects. The goal is to create pavement that remains durable enough to support thousands of vehicles while resisting both extreme heat and the constant stress of heavy traffic.
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Sources
- Summary by Intellect · source: Why Does the Sun Make Asphalt Roads Soft?
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