Removing Paving Blocks

1
Removing Paving Blocks

• Presented by
• Roberto C. Contreras
• February 23, 2004

2
New paving block that absorbs traffic pollution
3

• Nitrogen Oxide (Nox) are the exhaust gases from
  automobiles
• Noxer is a new environmentally friendly concrete
  paving block developed to remove (Nox) from the
  air at the roadside
• Contains Titanium oxide
• The only energy source it uses is sunlight
• Most effective if used in heavy traffic areas
• Strength and slipping resistance are equal to
  standard interlocking blocks
• A wide variety of shapes and colors are available

4
How does it work?

• The paving works by setting up a photocatalytic
  reaction between titanium dioxide contained at
  the top 15 mm of the block and ultraviolet
  radiation from the sun.
• Active Oxygen has a high oxidation efficiency
  and oxidizes NO(x) in the air into nitric acid
• The nitric acid is then washed away by rain to
  allow more reactions
• The reaction works both in dry and wet conditions

5
Process of NOx removal
6

• It was first tested in Osaka, Japan
• Developed by Marshalls and Mitsubishi Materials
  Corporation
• Website Reference
• www.mmc.co.jp
• www.building.co.uk
• www.concretequarterly.com