MODIFICATION OF ASPHALT AND ASPHALT PAVING MIXTURES BY SULFUR ADDITIVES

Five series of investigations have been undertaken to evaluate the rheological, durability, and chemical effects of sulfur addition to asphalts and asphalt paving mixtures. Sulfur was added to asphalt or asphalt concrete at normal mixing temperature of 150 DEG C. The original and aged (both laboratory and natural) sulfur asphalts, at sulfur-asphalt weight ratios of 0.02 to 1.80, were tested for penetration, ductility, softening point, percent asphaltene, percent total and free sulfur, mixture stability, and hydrogen sulfide evolution. The addition of sulfur to asphalt at working temperature of 150 DEG C resulted in an increase in asphaltene content, percent bonded sulfur, and evolution of hydrogen sulfide. Data also indicated the existence of optimum sulfur concentration for sulfur modification and sulfur-asphalt concrete stability. /Author/

• Corporate Authors:

  American Chemical Society

  1155 16th Street, NW
  Washington, DC  United States  20036
• Authors:
  • Lee, D Y
• Publication Date: 1975-9

Media Info

• Pagination: p. 171-177
• Serial:
  • Industrial and Engineering Chem Product Res & Dev
  • Volume: 14
  • Issue Number: 3

Subject/Index Terms

• TRT Terms: Asphalt; Asphaltene; Bituminous mixtures; Chemical reactions; Concentration (Chemistry); Ductility; Durability; Hydrogen sulfide; Pendulum tests; Rheological properties; Stability (Mechanics); Sulfur
• Uncontrolled Terms: Concentration
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00125786
• Record Type: Publication
• Files: TRIS
• Created Date: Dec 16 1975 12:00AM