Casting of a concrete support at Dunbar train station for platform expansion.

Concrete is amazing, kind of like 'cold' lava: liquid rock you can pour and then sets. It's 'traditional' too, with some formulations (Pozzolana) being used in ancient Rome.

It's also really badly recycled, takes up loads of space in landfill and emitting loads of Co2 net. We need to use less of it.

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