Saturday, May 21, 2011

Free Prom Dresses Catalogs By Mail

OPUS CAEMENTICIUM




Opus caementicium or Roman concrete. The invention of this new construction method based on a mix of light rock (tufa, pozzolana, tuff), lime, sand, rubble and small stones, he had experienced a major construction boom. This new element linked to its low cost, excellent performance to moisture, and tremendous strength.

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