Recycled asphalt production apparatus

An apparatus for producing hot mix 100% recycled asphalt comprising:

• a rotatable inclined drum having a central axis and having a first and second end;
• a heat source in tandem with and spaced away from one of the first and second ends for introducing flame free hot gas and air into the drum via the one of the first and second ends, wherein the one of the first and second ends is lower than the other of the first and second ends;
• an aggregate supply for introducing 100% recycled asphalt pavement (RAP) aggregate into the drum through one of the first and second ends;
• and
• a recycled asphalt pavement (RAP) collar spaced from the first and second ends and positioned around the drum for introducing RAP sand through the RAP collar into the drum as the drum is rotated to mix and heat the aggregate and sand to form 100% RAP hot mix asphalt, wherein the drum has plurality of radial openings through an annular side wall of the drum through which RAP sand can enter via the RAP collar and wherein the RAP collar has an annular heat and smoke shield fastened to the RAP collar around the drum for minimizing escape of hot gas from the drum openings beneath the RAP collar.

An apparatus for producing 100% recycled hot mix asphalt comprising:

• a rotatable inclined counterflow heating drum having a central axis and having a first and second end;
• a heat source spaced from one of the ends for introducing flame free hot gas into the drum via the one of the first and second ends, wherein the one end is lower than the other of the first and second ends;
• a 100% recycled asphalt pavement (RAP) aggregate supply for introducing aggregate into the drum through the other one of the first and second ends;
• and
• a recycled asphalt pavement (RAP) collar spaced from the ends and positioned around the drum for introducing 100% recycled asphalt pavement sand through the RAP collar into the drum as the drum is rotated to mix and heat the aggregate and sand to form hot mix asphalt, wherein the drum includes an annular side wall within the RAP collar with a plurality of radial openings through which sand can enter via the RAP collar, an annular heat and smoke shield fastened to the RAP collar around the drum for minimizing escape of hot gases from the drum openings beneath the RAP collar, and wherein the drum has at least one replaceable bucket within each of the plurality of openings for receiving and distributing sand into the drum as the drum is rotated about its axis.