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Air and Water Impacts of TX Active Concrete Pavement St. Louis, Missouri, Rte. 141. TX Active Photocatalytic Cement. Developed by Italcementi Contains titanium dioxide (a photocatalyst) in anatase form Abates smog-forming emissions (e.g., nitrogen oxides)
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Air and Water Impacts of TX Active Concrete PavementSt. Louis, Missouri, Rte. 141
TX Active Photocatalytic Cement • Developed by Italcementi • Contains titanium dioxide (a photocatalyst) in anatase form • Abates smog-forming emissions (e.g., nitrogen oxides) • Self-cleaning, maintains surface color
Photocatalytic Concrete • Washed from surface Water NOX NO3- H+ • Adsorbs on ‘active’ site ●OH NOXads Runoff water with a projected low NO3- presence site Oxidized by photo-generated hydroxyl ions 1 2 3
TX Active Research Project Overview • Relocated Rte 141 project, Chesterfield, MO • 46,450 anticipated AADT • Near St. Louis (population of 3,000,000)) • 1500 foot test section (placed in Oct 2011) • Two-lift construction (2” on 7”) • TX Active cement in top lift • TX Active cement in pervious concrete shoulder • Will monitor (over a 1-year period) • Air quality (NOx, NO2, NO) • Water quality (BOD, COD, nitrate) • Funded by:
TX Active Project Site Water Sampling TX Active Control Air Sampling
