A federal law banning the manufacture of chemical solvents has prompted researchers to develop new technologies to aid in the determination of asphalt content and aggregate gradation of hot-mix asphalt (HMA)--a process formerly completed by using chlorinated solvents. A new technique called the ignition method burns off the asphalt binder by heating the HMA, leaving clean aggregate that can be analyzed for gradation. The loss of weight from the burn is directly related to asphalt content; that is, "before" and "after" weights of the material are compared. This article describes the ignition method, the furnaces required to burn the material, and the advantages and disadvantages to using external or internal scales. Some of the newly developed heating equipment is highlighted.

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  • Corporate Authors:

    Scranton Gillette Communications

    380 E Northwest Highway, Suite 200
    Des Planes, IL  United States  60016-2282
  • Authors:
    • Banasiak, D
  • Publication Date: 1996-1


  • English

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Filing Info

  • Accession Number: 00719298
  • Record Type: Publication
  • Files: TRIS, ATRI
  • Created Date: Mar 20 1996 12:00AM