| 摘要 |
A drum mixer for heating and drying stone aggregate as part of a process of continuous production of asphalt paving composition, the drum mixer including: an elongate hollow rotatable drum having a length and an outer surface, the elongate hollow rotatable drum defining a central axis, a sleeve having an inner surface, the sleeve being mounted coaxially with the elongate hollow rotatable drum about the central axis and around at least a portion of the length of the elongate hollow rotatable drum and so as to define an annular chamber having an entire distance between the outer surface of the elongate hollow rotatable drum and the inner surface of the sleeve, and structure for mixing hot mix asphalt in the annular chamber including rake flights mounted on the outer surface of the elongate hollow rotatable drum and in the annular chamber including scouring structure for lifting hot mix asphalt up from a lower portion of the annular chamber along the inner surface of the sleeve through the annular chamber and onto an upper portion of the outer surface of the elongate hollow rotatable drum, the scouring structure including a plurality of shaped scouring fingers extending radially toward the outer surface of the elongate hollow rotatable drum so as to break-up hot mix asphalt and allow hot mix asphalt to fall through the rake flights and onto the upper portion of the outer surface of the elongate hollow rotatable drum, thereby scouring the outer surface of the elongate hollow rotatable drum.
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