Return to old; Al:silicate cement more environmentally friendly

From gizmag, a post about research in what they are calling a new type of cement; a great example of reading the comments giving the really important info!

This technology isn't as "new" as some people think. Cement used in the Roman Empire had a similar Aluminium-Silicate base as Geo-polymer cement (which is probably why so many of their structures are still standing after around 2000 years). Also, buildings in the former Soviet Union also used Aluminium-Silicate based cements over those using Calcium Oxide (Portland Cement).

Sort of makes you wonder what hold the makers of Portland Cement have over Governments & the Building Industry, that their obviously INFERIOR product has been a staple of construction-in the West-for the last couple of centuries.