Patent ID: 6699577
Filing Date: 2004-03-02
Classification: B01D,B01J,C04B,E01C,E01H,Y02A,Y02T,Y10T

Abstract:
An air purification-functioning road comprising a photocatalyst layer consisting of a concrete that comprises a photocatalyst, cement and filler, which is formed on a dewaterable pavement, wherein the dewaterable pavement comprises aggregates having maximum particle size of about 4 to about 8 mm and provides projections and depressions on the surface of the dewaterable pavement which are caused by the aggregates, and the photocatalyst layer covers at least a part of the surface of the dewaterable pavement by injecting or spraying a mixture comprising a photocatalyst, cement which is used for forming a concrete layer, a filler and water onto the surface of the dewaterable pavement directly, said photocatalyst being titanium dioxide particles to which one or more of lanthanum and a lanthanum compound is added to the surfaces and/or insides of the particles.