초록 ▼

An apparatus for making asphalt paving material includes a dust collection and distribution system by which aggregate dust that is collected during the heating and drying of aggregate may be introduced into the mixing chamber and distributed over a substantial portion of the area of the mixing chamb

An apparatus for making asphalt paving material includes a dust collection and distribution system by which aggregate dust that is collected during the heating and drying of aggregate may be introduced into the mixing chamber and distributed over a substantial portion of the area of the mixing chamber. By distributing the aggregate dust over a broader area of the mixing chamber than has been previously known, the mixing effort required to achieve a thorough blending of the dust into the mixture is reduced, and the quality of the asphalt paving composition is improved.

대표청구항 ▼

[What is claimed is:] [1.](A) a heating/drying chamber which includes:(i) an inlet for aggregate material;(ii) a burner that is adapted to heat and dry aggregate material in the heating/drying chamber;(iii) a first outlet for gases of combustion and aggregate dust;(iv) a second outlet for dried and

[What is claimed is:] [1.](A) a heating/drying chamber which includes:(i) an inlet for aggregate material;(ii) a burner that is adapted to heat and dry aggregate material in the heating/drying chamber;(iii) a first outlet for gases of combustion and aggregate dust;(iv) a second outlet for dried and heated aggregate material;(B) means for collecting aggregate dust exiting from the first outlet of the heating/drying chamber;(C) a mixing chamber which includes:(i) a first inlet for heated and dried aggregate material;(ii) a second inlet for asphalt cement;(iii) a third inlet for aggregate dust, said inlet being adapted to distribute the aggregate dust over a substantial portion of the area of the mixing chamber;(iv) means for mixing heated and dried aggregate material and aggregate dust with asphalt cement within the mixing chamber;(v) an outlet for asphalt paving material;(D) means for conveying heated and dried aggregate material from the outlet of the heating/drying chamber to the first inlet of the mixing chamber;(E) means for conveying aggregate dust collected from the first outlet of the heating/drying chamber to the third inlet of the mixing chamber.