초록 ▼

A series of treatments are performed on old asphaltic pavement to make it suitable for being satisfactorily applied as a new mat. The old asphaltic pavement is heated and scarified to form a loose aggregate-asphaltic mixture while remaining on the ground surface. The mixture is removed from the grou

A series of treatments are performed on old asphaltic pavement to make it suitable for being satisfactorily applied as a new mat. The old asphaltic pavement is heated and scarified to form a loose aggregate-asphaltic mixture while remaining on the ground surface. The mixture is removed from the ground surface and heated in an elongated rotary housing having heated conductors without direct flame contact with the mixture, and the mixture is then thoroughly mixed with a conditioner for old asphaltic pavement, and finally is reapplied to the ground surface as a new mat. The treatments are carried out by independently operable, portable apparatus during the movement of all of the apparatus in a coordinated train that moves over the ground surface.

대표청구항 ▼

In apparatus for reconditioning asphaltic pavement for road surfacing and the like, a combination comprising: a frame supported on wheels for vehicular movement over a ground surface; an elongated, generally cylindrical housing on said frame mounted for rotation about a longitudinal axis forming an

In apparatus for reconditioning asphaltic pavement for road surfacing and the like, a combination comprising: a frame supported on wheels for vehicular movement over a ground surface; an elongated, generally cylindrical housing on said frame mounted for rotation about a longitudinal axis forming an inner chamber elevated above the ground surface having a material inlet at one end and a material outlet at the opposite end through which a loose asphalt-aggregate mixture delivered to said material inlet passes and is discharged through said material outlet, said chamber having a gas inlet at one end and a gas outlet opposite the gas inlet to pass gas through said chamber; drive means operatively associated with said housing for rotating said housing about its longitudinal axis; means for picking up said mixture from the ground surface while moving relative to the ground surface and delivering said mixture to said material inlet; heating means operatively associated with said housing for heating gases passed through said gas inlet in heat exchange relation to said mixture and out said gas outlet to heat said mixture as said mixture is tumbled in said housing for uniformly, simultaneously heating and mixing said mixture; means movable with said heating means and operatively associated with said housing for adding a conditioner replacing at least some of the ingredients lost by oxidation of the asphaltic pavement to said heated mixture; and mixing apparatus on said frame for thoroughly and intimately mixing the conditioner and picked-up mixture independently of the ground surface while confined in a mixing chamber supported above the ground surface, said chamber having a bottom wall over which the conditioned mixture is moved above the ground surface between an inlet and an outlet and further having paddle blades disposed in an axially spaced and radially extending arrangement above the bottom wall between the inlet and outlet, to form a reconditioned mixture of a composition and consistency suitable for being rolled into a new mat of asphaltic pavement while moving relative to the ground surface, said converting, picking up and mixing being coordinated in movement with one another relative to the ground surface.