Patent ID: 6439804
Filing Date: 2002-08-27
Classification: E01C

Abstract:
A method for controlling the mixing of asphalt aggregate with rejuvenating materials in an asphalt rejuvenating machine, said method comprising the steps of:(i) dislodging a top layer of an asphalt paved surface; (ii) passing a milling apparatus over the dislodged layer from step (i) to strip said top layer and break up said top layer of said asphalt paved surface to form a milled aggregate; (iii) adding rejuvenating material to said milled aggregate; (iv) transferring said milled aggregate to a mixer and blending said milled aggregate with said rejuvenating material to form a blended aggregate (v) discharging one of said blended aggregate and said milled aggregate in a windrow of pre-determined width; (vi) measuring the height of said windrow; (vii) measuring a speed of travel of said asphalt rejuvenating machine; (viii) comparing said height with said speed and determining a volume rate of discharge from said mixer; (ix) determining a desired rate of addition of said rejuvenating materials which corresponds to said volume rate of discharge and a pre-determined final composition; and, (x) adjusting a rate of addition of said rejuvenating material in step (iii) to correspond to said desired rate of addition from step (ix).