This Concrete Repairs Its Own Cracks. Lasts 2,000 Years. Why Don’t We Use It Today? скачать в хорошем качестве

This Concrete Repairs Its Own Cracks. Lasts 2,000 Years. Why Don’t We Use It Today?

This Concrete Repairs Its Own Cracks. Lasts 2,000 Years. Why Don’t We Use It Today? There is a concrete that gets stronger when you submerge it in seawater. Modern concrete dissolves in seawater within decades. This concrete crystallizes. It seals its own cracks from the inside. It has been sitting at the bottom of the Mediterranean for two thousand years and it is not crumbling. It is not corroding. It is harder today than the day it was poured. The Pantheon's dome — 142 feet across, unreinforced, no steel, no rebar — has been standing since 128 AD. It is still the largest unreinforced concrete dome on Earth. No modern engineer has built anything close to it without steel. The recipe that beats everything we have built in two hundred years was written down in 25 BC. We have known where to find it the entire time. We chose not to look. And that choice is now costing the planet 8% of all global carbon emissions every single year.