This reminded me of a bit from 2014 where some researchers claim to have rediscovered the Roman's particular recipe for long-lasting concrete. http://www.pnas.

This reminded me of a bit from 2014 where some researchers claim to have rediscovered the Roman's particular recipe for long-lasting concrete. http://www.pnas.org/content/111/52/18484.abstract http://www.pnas.org/content/111/52/18484.abstract For laypersons http://www.dailymail.co.uk/sciencetech/article-2877547/Why-Colosseum-hasn-t-collapsed-Roman-concrete-used-secret-ingredient-stand-test-time-engineers-want-copy-it.html http://www.dailymail.co.uk/sciencetech/article-2877547/Why-C...