초록 ▼

An improved method and apparatus for producing hot mix asphalt utilizing new aggregate and a previously manufactured and laid asphalt mix which has been reduced to form recyclable aggregate, wherein the new aggregate is fed into the input end of a rotating mixer drum and cascaded repeatedly through

An improved method and apparatus for producing hot mix asphalt utilizing new aggregate and a previously manufactured and laid asphalt mix which has been reduced to form recyclable aggregate, wherein the new aggregate is fed into the input end of a rotating mixer drum and cascaded repeatedly through a flame extending from the input end of the mixer drum to a first medial portion thereof and the recyclable aggregate is fed radially into the mixer drum at a second medial portion thereof intermediate the first medial portion and the output end of the mixer drum, the new aggregate shielding the mixer drum from the flame and confining the flame to the portion of the mixer drum between the input end and the first medial portion thereof.

대표청구항 ▼

Apparatus for producing hot mix asphalt utilizing new aggregate and a previously manufactured and laid asphalt mix which has been reduced to form recyclable aggregate, comprising: a cylindrical mixer drum having an input end, an output end, and a recyclable aggregate feeding port extending radially

Apparatus for producing hot mix asphalt utilizing new aggregate and a previously manufactured and laid asphalt mix which has been reduced to form recyclable aggregate, comprising: a cylindrical mixer drum having an input end, an output end, and a recyclable aggregate feeding port extending radially through a medial portion thereof; means supporting the mixer drum for rotation about the longitudinal axis thereof with the input end of the mixer drum higher than the output end of the mixer drum; means at the input end of the mixer drum for producing a flame in the mixer drum extending from the input end of the mixer drum to a medial portion of the mixer drum; a recyclable aggregate feeding port cover pivotally connected to the mixer drum adjacent the recyclable aggregate feeding port therethrough, the recyclable aggregate feeding port cover rotating under the influence of gravity between an open position uncovering the recyclable aggregate feeding port and a closed position covering the recyclable aggregate feeding port in response to the rotation of the mixer drum; a shroud assembly disposed around the medial portion of the mixer drum and enclosing the recyclable aggregate feeding port, the shroud assembly having an input hopper portion communicating with the recyclable aggregate feeding port when the recyclable aggregate feeding port cover is in the open position thereof; recyclable aggregate conveyor means for feeding the recyclable aggregate into the input hopper portion of the shroud assembly; new aggregate conveyor means for feeding the new aggregate into the input end of the mixer drum; asphalt injection means for injecting asphaltic oil into the mixer drum; flight means connected to the inner periphery of the mixer drum for moving the new aggregate and recyclable aggregate around the mixer drum and mixing the asphaltic oil, new aggregate and recyclable aggregate within the mixer drum to form a hot mix asphalt; and means for discharging the hot mix asphalt from the output end of the mixer drum.