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Concrete In Australia : September 2013
10 Concrete in Australia Vol 39 No 3 NEWS See the latest Hilti innovations and engineering products at Concrete 2013, Gold Coast, October 16--18. s at Concrete 2013. Attend the Hilti Fastening Academy! Learn new methods to revolutionise your next fastening design. 17th October, 5.30pm Register today at www.hilti.com.au/academy Visit us at stand #53/54 Is smog eating concrete the next new green idea? Researchers at Eindhoven University of Technology in the Netherlands have found that giving city street pavements a special coating may help reduce vehicle-generated smog. In a year-long study, they tested an entire city block whose concrete had been covered with a titanium oxide coating and compared it with normal concrete pavements on an adjacent city block used as a control. e ndings, published in June, found a 19% reduction in nitrogen oxide air pollution over the average day along the test road that used so-called "photocatalytic" concrete. e technology involves mixing particles of titanium oxide within white or grey cement, but it can also be used with all other varieties of concrete, including plaster and mortar. e titanium dioxide takes pollutants such as nitrogen oxide, and converts them into relatively harmless nitrates. However costs for this new procedure may delay its implementation. ough earlier tests used a titanium dioxide- coated pavement that cost about 50% more, researchers said they were hopeful that in the future, the overall cost of adding this smog eating coating would only add 10% more than what standard road repaving costs now.