NOx REMOVING PAVEMENT STRUCTURE

摘要

A NOx removing pavement structure which comprises a concrete base layer (1), a pavement layer (2) and a surface layer (3) as shown in the figure. The surface layer (3) comprises 100 parts by weight of cement, 5-50 parts by weight of titanium oxide powder and 100-700 parts by weight of aggregate, so that it is possible to provide the surface layer on the pavement layer with a NOx removing effect and an excellent durability. Borazon and, especially, blast furnace slag and adsorptive substance can be added to this surface layer. The pavement layer (2) comprises an asphalt pavement layer (21) in some cases, and a concrete pavement layer (6) in other cases, these pavement layers including already-constructed pavement layer. The asphalt pavement layer preferably comprises a porous asphalt pavement layer, the outer surface of which preferably has minute recesses and projections. It is preferable that the thickness of the surface layer be set to 1-300 mm when it is formed on a concrete pavement layer, and 2-15 mm when it is formed on an asphalt pavement layer. The cement in use preferably comprises semi-flexible pavement injection cement.