Modern concrete has steel rebar, which is very useful, but eventually corrodes. Stainless steel rebar could be used if longevity mattered, but usually it doesn’t because the building will likely become functionally obsolete and need replacing before then.

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6 hours ago | parent | next [-]

[deleted]

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warumdarum 7 hours ago | parent | prev | next [-]

You could wouldnt even need that. https://de.wikipedia.org/wiki/Opferanode

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eru 7 hours ago | parent [-]

Yes, but you have to replace the sacrificial anode every so often.

https://en.wikipedia.org/wiki/Galvanic_anode

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Barbing 6 hours ago | parent [-]

Like the plate of food on the grass for the bees at the barbecue

	▲	beeforpork 3 hours ago \| parent \| next [-]
		Wasps, not bees. (Sorry, I'm a bit of a nerd. But I am sure you can cope with that.)
	▲	eru 4 hours ago \| parent \| prev [-]
		More for the wasps, I guess?

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masklinn 7 hours ago | parent | prev | next [-]

> Stainless steel rebar could be used

There are also coated and non-metallic rebars.

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terribleperson 6 hours ago | parent [-]

Coated rebar could be good, but the coating can be damaged anywhere from manufacture to installation.

	▲	masklinn an hour ago \| parent [-]
		Yup, every alternative rebar has drawbacks which causes increased costs or different failure modes which is why they tend to be used in specialised applications where they are necessary.

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benj111 2 hours ago | parent | prev [-]

Define functionally obsolete.

Ultimately most tall structures as a reinforced concrete skeleton with glass hung on the sides.

It seems to me that as you're going to replace it with another basically identical concrete skeleton it makes sense to have that skeleton last as long as possible. And then refit that skeleton.