Removing Paving BlocksRemoving Paving Blocks

Presented byPresented by

Roberto C. ContrerasRoberto C. Contreras

February 23, 2004February 23, 2004

New paving block that absorbs New paving block that absorbs

traffic pollutiontraffic pollution

Nitrogen Oxide (Nox) are the exhaust gases Nitrogen Oxide (Nox) are the exhaust gases from automobilesfrom automobiles

Noxer is a new environmentally friendly Noxer is a new environmentally friendly concrete paving block developed to remove concrete paving block developed to remove (Nox) from the air at the roadside(Nox) from the air at the roadside

Contains Titanium oxideContains Titanium oxide The only energy source it uses is sunlightThe only energy source it uses is sunlight Most effective if used in heavy traffic areasMost effective if used in heavy traffic areas Strength and slipping resistance are equal to Strength and slipping resistance are equal to

standard interlocking blocksstandard interlocking blocks A wide variety of shapes and colors are A wide variety of shapes and colors are

availableavailable

How does it work?How does it work? The paving works by setting up a photocatalytic The paving works by setting up a photocatalytic

reaction between titanium dioxide contained at reaction between titanium dioxide contained at the top 15 mm of the block and ultraviolet the top 15 mm of the block and ultraviolet radiation from the sun.radiation from the sun.

Active Oxygen has a high oxidation efficiency Active Oxygen has a high oxidation efficiency and oxidizes NO(x) in the air into nitric acidand oxidizes NO(x) in the air into nitric acid

The nitric acid is then washed away by rain to The nitric acid is then washed away by rain to allow more reactions allow more reactions

The reaction works both in dry and wet The reaction works both in dry and wet conditionsconditions

Process of NOx removalProcess of NOx removal

It was first tested in Osaka, JapanIt was first tested in Osaka, JapanDeveloped by Marshalls and Mitsubishi Developed by Marshalls and Mitsubishi

Materials CorporationMaterials Corporation

Website ReferenceWebsite Referencewww.mmc.co.jpwww.mmc.co.jpwww.building.co.ukwww.building.co.ukwww.concretequarterly.comwww.concretequarterly.com