[Greenbuilding] Unconscionable Concrete Use

[Peter/Pam Martin]

Learned in an article at 
http://www.ancient-origins.net/history/ten-things-ancients-did-better-us-004557 
that the Romans made concrete by mixing lime, 
volcanic rock, and seawater that contained the 
ideal crystalline structure of Tobermorite. 
Purportedly the Roman concrete had a greater 
strength and durability than modern concrete as 
well as only requiring baking the limestone at 
900°C. Any present attempts at duplicating this process?

Another concrete observation: I've been watching 
a series on public TV called Grand Designs where 
the builders use inordinate quantities of 
concrete, with some of the slab pours having the 
consistency of soup. Is this normal practice in 
the UK? It reminds me of the building methods of 
Mike "I don't use one stud when I can use five" Holmes.

Peter 
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