Apparatus and process for manufacturing asphalt

  • US RE39,289 E1
  • Filed: 04/03/2002
  • Issued: 09/19/2006
  • Est. Priority Date: 02/09/1999
  • Status: Expired due to Term
First Claim
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1. An improvement in a process for producing asphaltic concrete of the type involving using a heated asphalt counterflow drum mixer wherein a composition comprising asphaltic cement, coarse aggregate, and fine aggregate is heated and mixed in a hot mix process to produce the asphaltic concrete, the improvement comprising:

  • admixing a composition comprising from about 20 to about 80 percent tar sand, by weight, with from about 80 to about 20 percent aggregate, by weight, and from about 1 to less than about 5 percent, by weight, liquid asphalt cement in said drum mixer to form an admixture from said composition;

    heating said admixture at a first elevated temperature for a set period of time; and

    discharging said heated admixture at a second elevated temperature to produce asphaltic concrete.

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