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Title:

Pervious Concrete with Titanium Dioxide as a Photocatalyst Compound for a Greener Urban Road Environment
Cover of Pervious Concrete with Titanium Dioxide as a Photocatalyst Compound for a Greener Urban Road Environment

Accession Number:

01366251

Record Type:

Component

Abstract:

The United States is facing the problem of trying to control air pollution from vehicle emissions, especially in growing urban areas. This study innovatively investigates applying the photocatalytic effect of titanium dioxide (TiO2) onto pervious concrete pavement to remove some of these pollutants from the air, so that pervious concrete pavement can be installed for two sustainable applications: storm water management and air pollutant removal. The photocatalyst, TiO2, activates with UV radiation to oxidize air pollutants, such as nitrogen oxides (NOx) and volatile organic compounds (VOCs). This study compared different methods to apply TiO2 onto the surface of pervious concrete and measured the photocatalytic activity of the concrete, the infiltrating characteristics of the pervious concrete, and its ability to withstand environmental weathering. A brief analysis on each application method with respect to material cost is also presented. High pollutant reductions were seen with a driveway protector mix, a commercial water-based TiO2 preparation, TiO2 in water, a cement-water slurry with low cement concentration, and the commercial PURETI coating. It was found that nitrogen oxide (NO) was efficiently removed with each of these treatments, while VOCs displayed more variability in removal efficiency. The PURETI coating had the least effect on reducing the infiltration rate of the pervious concrete. The driveway protector mix had the highest resistance against deicing chemical and freeze-thaw testing. When pervious concrete was compared to traditional concrete, pervious concrete showed higher NO reductions, whether the sample had TiO2 coating on it or not.

Supplemental Notes:

This paper was sponsored by TRB committee AF000(2) Pavement Materials and the Urban Climate

Monograph Accession #:

01362476

Report/Paper Numbers:

12-0995

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Shen, Shihui

ORCID 0000-0002-5718-722X

Burton, Maria
Jobson, Bertram
Haselbach, Liv

Pagination:

19p

Publication Date:

2012

Conference:

Transportation Research Board 91st Annual Meeting

Location: Washington DC, United States
Date: 2012-1-22 to 2012-1-26
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; References; Tables

Subject Areas:

Environment; Highways; Materials; Pavements; I15: Environment; I32: Concrete

Source Data:

Transportation Research Board Annual Meeting 2012 Paper #12-0995

Files:

PRP, TRIS, TRB

Created Date:

Feb 8 2012 4:59PM