Apparatus and method for production of asphalt pavement having high recycled asphalt content
First Claim
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1. An apparatus for producing an asphalt based pavement material from recycled asphaltic pavement (RAP) and virgin aggregate comprising in combination:
- a first high temperature rotating drum heater for heating said virgin rock to a temperature greater than 350°
F.;
a second low temperature air impingement air dryer heater for heating RAP to a temperature below that at which smoking of said RAP occurs;
means for continuously moving said virgin rock from said first heater and said RAP from said second heater to a means for mixing said RAP and rock.
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Abstract
An apparatus and method for manufacture of asphaltic pavement from recycled asphalt pavement (RAP) and virgin rock and asphaltic materials is shown and described. This method utilizes efficient and controlled heat from a recirculating air impingement air dryer for heating of the RAP to a first temperature prior to the RAP being mixed with high temperature rock which is supplied from a rotating drum heater. The mixture of rock and RAP may comprise as much as 80% RAP because the RAP is preheated piror to the RAP rock mixing step.
25 Citations
8 Claims
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1. An apparatus for producing an asphalt based pavement material from recycled asphaltic pavement (RAP) and virgin aggregate comprising in combination:
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a first high temperature rotating drum heater for heating said virgin rock to a temperature greater than 350°
F.;a second low temperature air impingement air dryer heater for heating RAP to a temperature below that at which smoking of said RAP occurs; means for continuously moving said virgin rock from said first heater and said RAP from said second heater to a means for mixing said RAP and rock. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification