E - Fixed Constructions – 01 – C
Patent
E - Fixed Constructions
01
C
259/1
E01C 7/24 (2006.01) E01C 7/18 (2006.01) E01C 19/10 (2006.01) E01C 23/06 (2006.01) F02B 3/06 (2006.01)
Patent
CA 1134344
Abstract of the Disclosure A process for rejuvenating and recycling used asphalt and a machine including a pugmill mixing chamber for mixing crushed as- phalt supplied thereto and for mixing water, calcium oxide and as- phalt oil therewith is disclosed. The water and calcium oxide mix- ture react and chemically combine to form a calcium hydroxide filler material to thus fill the voids and gaps in the rejuvenated asphalt that would otherwise exist. The reaction, being exothermic, increase the temperature of the resultant asphalt based mixture to a level suitable for spreading of the rejuvenated material on a prepared sur- face. The asphalt oil is preferably preheated using a heat exchanger coil connected to a diesel engine radiator, which coil is immersed in an asphalt oil storage tank carried on the machine so that the vis- cosity of the oil may be reduced to a reasonable value suitable for pumping to the mixing chamber and spraying on the materials contain- ed therein. A storage bin for storing granulated calcium oxide is positioned above the pugmill mixing chamber and contains an elongat- ed opening in the bottom surface thereof which allows the bin to com- municate with the chamber. A cylindrically-shaped rotatable meter- ing device is positioned at the bottom of the bin over the opening and contains a series of elongated axially extending slots radially displaced around the metering device so that the slots carry a mea- sured quantity of calcium oxide from the bin into the chamber through the opening as the device is rotated, the speed of rotation of the device thus determining the rate at which material from the bin is introduced into the chamber.
353959
Bauer Andrew J.
Doering John N.
Balke Fred W.
Bauer Andrew J.
Doering John N.
Ridout & Maybee Llp
Shaw Harold G.
LandOfFree
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