Title: Concrete that Cleans Itself and the Air

Author(s): Marco Barbesta and Dan Schaffer

Publication: Concrete International

Volume: 31

Issue: 2

Appears on pages(s): 49-51

Keywords: cement; nanotechnology; photocatalyst; pollution

DOI:

Date: 2/1/2009

Abstract:
After 10 years of development and testing, concrete that removes pollutants from the air as it keeps its surface clean is now available in North America. The product that makes this possible is a patented portland cement developed by Italcementi Group and produced in North America by its U.S. subsidiary, Essroc. The key to the material’s properties is photocatalytic components that use the energy from ultraviolet rays to oxidize most organic and some inorganic compounds. Air pollutants that would normally result in discoloration of exposed surfaces are removed from the atmosphere by the components, and their residues are washed off by rain. This new cement can be used to produce concrete and plaster products that save on maintenance costs while ensuring a cleaner environment.