Determination of optimum asphalt film thickness in relation with aging of hotmix asphalt

The level of performance and service life of the roads has a close relationship with the aging property of the asphalt binder. Aging phenomenon, which is the primary factor for contributing to the above-mentioned failures, is defined as the hardening of asphalt binder due to loss of volatile components and oxidation. High permeability, high air voids and thin asphalt film thicknesses are the primary causes of the aging of asphalt binder. This study is aimed at determining the relationship between the asphalt film thickness and the short-term (aging of asphalt binder during mixing with aggregate, transportation to job-site, compaction) and long-term (during service life of the road) aging characteristics of hot mix asphalt. Resilient modulus test is conducted on the compacted specimens using Superpave gyratory compactor in order to obtain optimum film thickness for satisfactory mix durability. From the figures plotted between asphalt film thickness and resilient modulus of the aged samples, accepted quadratic functions and an optimum asphalt film thickness is obtained.

• Authors:
  • Sengoz, B
  • Agar, E
• Conference:
  • Eurasphalt and Eurobitume Congress, 3rd, 2004, Vienna, Austria
• Publication Date: 2004-5

Language

• English

Media Info

• Pagination: 14p
• Serial:
  • Issue Number: 027

Subject/Index Terms

• TRT Terms: Binders; Bituminous pavements; Compaction; Durability; Material aging; Modulus of deformation; Oxidation; Thickness
• ATRI Terms: Ageing; Asphalt; Binder; Compaction; Durability; Modulus; Oxidation; Thickness
• Subject Areas: Construction; Highways;

Filing Info

• Accession Number: 01387616
• Record Type: Publication
• Source Agency: ARRB
• Files: ATRI
• Created Date: Aug 23 2012 12:14AM