PaintSquare.com


The First Word in Protective & Marine Coatings

A Product of Technology Publishing / PaintSquare
JPCL | PaintSquare News | Durability + Design | Paint BidTracker

Resource Guide Extreme Temperatures

Paint and Coatings Industry News

Main News Page


Smog-Battling Concrete Gains Support

Thursday, July 18, 2013

More items for Coating Materials

More items from Europe

Comment | More

Titanium dioxide-laced concrete could help cut down air pollution when incorporated into roads, lab and field tests in the Netherlands have concluded.

Researchers found that nitrogen oxide (NOx) could be reduced by up to 45 percent in perfect conditions with air-purifying concrete stones containing titanium dioxide, a photocatalytic material that removes the NOx from the air and converts it into a harmless nitrate with help from the sun.

smog eating concrete
Science Direct

A street in the Netherlands covered in air-purifying concrete containing titanium dioxide was found to reduce air pollution, newly published research says.

While the potential of photocatalytic materials to reduce air pollution has been studied for several years, the newly published research supports titanium dioxide as an effective smog reducer.

A Year of Testing

For the project, researches from Eindhoven University of Technology (TU/e) covered 1,000 square meters (about 10,764 square feet) of a road surface in Hengelo, the Netherlands, were covered with air-purifying concrete paving stones. Another area of the same size was surfaced with normal paving stones for a control group.

"The air-purifying properties of the new paving stones had already been shown in the laboratory, but these results now show that they also work outdoors," said Prof. Jos Brouwers in an earlier press release from TU/e.

Brouwers has been a professor of building materials in the TU/e Department of Architecture, Building and Planning since September 2009.

Researchers carried out three air-purity measurements on the surfaces at heights betwen a half and one-and-a-half meters. The area covered with the air-purifying concrete had a NOx, the reactive gas air pollutant given off by car emissions, content that was 25 to 45 percent lower than the one surfaced with normal concrete.

The outdoor monitoring was done for 26 days, spaced out for over a year in order to monitor performance in different seasons and weather conditions. Measured parameters included traffic intensity, nitric oxide, nitrogen dioxide and ozone concentrations, temperature, relative humidity, wind speed and direction, and the visible and UV light irradiance.

Wikimedia Commons

Areas with a lot of air pollution from car emissions could benefit from the concrete, as well as other products developed with photocatalytic materials, industry professionals say.

Before and during the street test, the concrete was also tested for the same measurements in the lab. Researchers found that, on average, the NOx concentration was 19 percent lower of the course of the day and 28 percent lower in the afternoons only compared to the control street. Under ideal weather conditions, which researchers consider high radiation and low relative humidity, a 45 percent decrease in NOx concentration could be observed.

Future of Street Design

Brouwers says he sees potential for numerous applications, particularly in areas where the maximum permitted NOx concentrations have been exceeded. The air-purifying concrete can also be mixed with open asphalt for use on roads that require asphalt and can also be used in self-cleaning and air-purifying building walls.

According to Brouwers, the overall cost of using the concrete on roads is only 10 percent higher, although the stones themselves are 50 percent more expensive than normal concrete stones.

"Preventing air pollution is clearly important to our long-term health and environmental protection, but this latest research shows the potential of chemically engineered surfaces to further improve our quality of life, especially in major urban areas where traffic emissions are high," said David Brown, chief executive of the Institution of Chemical Engineering (IChemE), in a press release.

Brown said that further studies are needed to assess photocatalytic materials. "However, the potential is there and gives a strong indication of how streets may be designed in the future," Brown said.

IChemE is a society for chemical, biochemical and process engineering professionals worldwide.

The research, "Full scale demonstration of air-purifying pavement," authored by M.M. Ballari and Brouwers, was published in June in the Journal of Hazardous Materials.

   

Tagged categories: Air pollution control; Concrete; Emissions; Photocatalytic coatings; Roads/Highways; Titanium dioxide

Comment Join the Conversation:

Sign in to our community to add your comments.

BASF
New resins from BASF will have metals loving water:

Excellent corrosion resistance, low VOC, high gloss, thin films basf.us/industrialcoatings
polyorders@basf.com
800-231-7868


Sherwin-Williams
Heat-FLex® Hi-Temp 1200

Improved Corrosion
Resistance
Enhanced Durability
Faster Shop Throughput


Wasser High-Tech Coatings Inc.
Wasser Coatings Protect

some of the most important bridges in the country; learn about our NEPCOAT-approved system and our entire range of MCU & Polyurea coatings. 1-800-627-2968 www.wassercoatings.com


International Paint LLC

International Paint Engineered Coatings

Learn about our solutions for:
  • Structural Steel
  • Piping & Equipment
  • Storage Tanks
  • Pressure Vessels
  • Secondary Containment


    Corrosion Probe, Inc.
    From Detection to Correction

    Corrosion Probe, Inc. has the Most Concrete Coatings Experience and Expertise. Contact us today at
    860-767-4402, www.cpiengineering.com


    Polyval Coatings
    Polyflex® Polyurea Linings

    exhibit outstanding versatility in use; providing abrasion resistance, superior seamless waterproofing and high-chem corrosion protection. www.polyflexlinings.com


    Simpson Strong-Tie
    Repair, Protect & Strengthen

    Need a coating? Turn to Fox. We have solutions to repair, protect and strengthen concrete, steel and wood substrates. Call 888-760-0369 or email info@foxind.com

  •  
     
     
    Technology Publishing

    The Technology Publishing Network

    The Journal of Protective Coatings & Linings (JPCL) PaintSquare
    Durability + Design Paint BidTracker JPCL Europe

     
    EXPLORE:      JPCL   |   PaintSquare News   |   Interact   |   Buying Guides   |   Webinars   |   Resources   |   Classifieds
    REGISTER AND SUBSCRIBE:      Free PaintSquare Registration   |   Subscribe to JPCL   |   Subscribe to PaintSquare News
    MORE:      About PaintSquare.com   |   Privacy policy   |   Terms & conditions   |   Site Map   |   Search   |   Contact Us
     

    © Copyright 2000-2014, Technology Publishing / PaintSquare, All rights reserved
    2100 Wharton Street, Suite 310, Pittsburgh PA 15203-1951; Tel 1-412-431-8300; Fax 1-412-431-5428; E-mail webmaster@paintsquare.com