is the brown-to-black, bituminous material (see bitumen) of high molecular weight, occurring naturally or as a residue from the distillation of crude oil; used as a bonding agent in road building, and in numerous industrial applications, including the manufacture of roofing. Blown, or oxidized asphalt is produced by blowing air through asphalt at high temperatures, producing a tougher, more durable asphalt.

Also see asphalt cement, asphaltenes, emulsified anionic asphalt, emulsified cationic asphalt, emulsion flux asphalt, penetration grading (asphalt), recycling of asphalt paving, viscosity (asphalt), viscosity grading (asphalt).