Laboratory Investigation of HMA Modulus, Flow Number and Flexural Fatigue on Samples of Varying Density

One of the concerns that the Kentucky Transportation Cabinet (KYTC) would like addressed is to better understand the relation of field density to pavement durability. An investigation of the effect of density on asphalt mixture performance was performed. Various performance and performance-related tests such as the beam fatigue, dynamic modulus, and flow number were used to measure the effect of varying density. It was found that an increase in 1.5 percent density can increase the fatigue life by eight percent, dynamic modulus by 15 percent, and the Flow Number by 34 percent. This paper also compares the Flow Number to the cycles to five percent failure using the same test. The paper concludes by performing a “what-if” scenario and adding more asphalt binder to the lab design to further understand the mixture’s potential performance and compactability in this higher than normal asphalt binder design scenario. It is found that a potentially more balanced mixture could be achieved by adding more asphalt and ultimately increasing the in-place pavement density. Adding asphalt and increasing pavement density should have a positive, compounding effect on overall performance if higher field density is achieved with the added asphalt cement content.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/02702932
• Authors:
  • Blankenship, Phillip B
  • Anderson, R Michael
• Conference:
  • Asphalt Paving Technology 2010
  • Location: Sacramento CA, United States
  • Date: 2010-3-7 to 2010-3-10
• Publication Date: 2010

Language

• English

Media Info

• Media Type: Print
• Features: CD-ROM; Figures; References; Tables;
• Pagination: pp 497-518
• Serial:
  • Journal of the Association of Asphalt Paving Technologists
  • Volume: 79
  • Publisher: Association of Asphalt Paving Technologists (AAPT)
  • ISSN: 0270-2932
  • Serial URL: https://www.asphalttechnology.org/site_page.cfm?pk_association_webpage_menu=9169&pk_association_webpage=19109

Subject/Index Terms

• TRT Terms: Asphalt mixtures; Failure; Flexural strength; Hot mix asphalt; Pavement performance; Service life
• Uncontrolled Terms: Flow number
• Subject Areas: Highways; Materials; I33: Other Materials used in Pavement Layers;

Filing Info

• Accession Number: 01328021
• Record Type: Publication
• Files: TRIS
• Created Date: Jan 20 2011 11:22AM