watching tunnel drilling videos on you tube

It would be great to have a carbon neutral alternative to cement

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Thinking more about it, it is absolutely necessary to develop a carbon neutral alternative to cement

Has anyone figured yet out how to high temperature reliable fast breeder reactor

· · SubwayTooter · 2 · 0 · 5

@x44203 it's hard (and expensive) to cut rock into uniform shape, and you still need to bind them together

@uint8_t @x44203 yeah, even the castle builders knew that :) but using more stones should at least turn down the need for cement, compared to building everything from concrete. The only other solutions I can think of is using some kind is glue or other adhesive, but I don't know much about their CO2 balance. Or building more houses out of wood (frequently done anyways at least in North America) but then the building height is quite restricted.

@daniel_bohrer @uint8_t @x44203 Stone also lasts much longer. I'm sitting in a house made from natural stone right now, which we don't even know when it was built originally, because they didn't have a registry back then. Cheap concrete falls apart after only a few decades, and the better quality stuff is usually not certified to last longer than a single century afaik.

The problem is that extracting and cutting stone is so expensive that it cannot solve the need for affordable housing etc..

@raucao @daniel_bohrer @uint8_t Wood too, aren't there some wood parts in venice which are more than a thousand years old?

@x44203 @daniel_bohrer @uint8_t Consider the price of a cubic meter of decent hardwood. If money is not an issue, then sure, build anything you want from it. :)

@uint8_t sulfur concrete can be used in a lot of cases. it still requires a lot of energy just like normal concrete but there is no co2 release during production of the raw
material.

en.wikipedia.org/wiki/Sulfur_c

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