EVALUATION OF THE DRUM MIXING PROCESS IN MAINE

During the summer of 1974, a study was conducted to evaluate drum mixer, the process, and the product. Emulsified asphalt rather than asphalt cement was used exclusively; therefore, direct comparison with similar type studies were limited. The results of this study indicated that a reasonably uniform product could be obtained if an effort was made to construct uniform stockpiles. A study of moisture content at various points in the process indicated that the burner removes stockpile moisture plus water in the emulsion to approximately 0.7 percent. Aeriation and additional evaporation eventually reduces the moisture content to approximately 0.5 percent when it is placed on the roadway. At no time was moisture in the mixture considered deterimental to handling and placing. Although a direct comparison could not be made, a study of the bitumen properties at various stages failed to prove or disprove the effects of the burner flame to oxidation of the bitumen.

• Corporate Authors:

  Maine Department of Transportation

  Materials and Research Division, Box 1208, Hogan Road
  Bangor, ME  United States  04402
• Authors:
  • Rand, D W
• Publication Date: 1975-3

Media Info

• Features: Figures; References; Tables;
• Pagination: 21 p.

Subject/Index Terms

• TRT Terms: Bitumen; Bituminous mixtures; Drum containers; Emulsified asphalt; Emulsions; Moisture content; Oxidation; Standardization; Stockpiling
• Old TRIS Terms: Bitumen emulsions; Drums
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00096321
• Record Type: Publication
• Report/Paper Numbers: Tech, Paper 74-9
• Files: TRIS, STATEDOT
• Created Date: Jul 15 1975 12:00AM