Secret to Roman Concrete

A bunch of sciencey type people did some sciencey type stuff and think they found the secret to the everlasting Roman concrete. Compared that to the junk we have today where you have to repoint your brick building after 10 years and sidewalks crack if you look at them funny, this might become a major discovery, especially for hydraulic concrete. Shhhhhh…its still a kind of a secret, but if you own a volcano, you might be sitting on a figurative gold mine. 

http://www.businessweek.com/articles/2013-06-14/ancient-roman-concrete-is-about-to-revolutionize-modern-architecture