Hot Mix Asphalt Moisture Sensitivity Testing Revisited

Recently, the Iowa Department of Transportation requested the Department of Civil, Construction and Environmental Engineering (CCEE) at Iowa State University to evaluate the possibility of using 150mm diameter Superpave samples instead of 4 in. (100mm) Marshall samples in an HMA moisture sensitivity test. The CCEE Department was asked to look into the possibility of a test using their Nottingham Asphalt Tester (NAT). This required that the team re-evaluate current test protocols, and re-think (reengineer) the approach to moisture sensitivity testing. A test protocol is proposed and was used in the DOT research project. Test results were analyzed using three parameters based on performance characteristics: the retained flow number based on critical permanent deformation failure (RFNP), the retained flow number based on cohesion-failure (RFNC) and the energy ratio (ER). Analysis demonstrated that the energy ratio of elastic strain (EREE ) at a flow number at cohesion failure (FNC) showed a higher potential to discriminate HMA moisture sensitivity. It was also shown that the vacuum saturation used in AASHTO T 283 and in the proposed test may unreasonably damage some specimens before testing, leading to "false" results.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/02702932
• Supplemental Notes:
  • This paper is only available on the CD-ROM located in the back of the hardcopy volume.
• Authors:
  • Kim, Sunghwan
  • 0000-0002-1239-2350
  • Coree, Brian J
• Conference:
  • 2006 Journal of the Association of Asphalt Paving Technologists: From the Proceedings of the Technical Sessions
  • Location: Savannah Georgia, United States
  • Date: 2006-3-27 to 2006-3-29
• Publication Date: 2006

Language

• English

Media Info

• Media Type: CD-ROM
• Features: Figures; References; Tables;
• Pagination: pp 1195-1234
• Serial:
  • Journal of the Association of Asphalt Paving Technologists
  • Volume: 75
  • 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: Cohesion; Elasticity (Mechanics); Failure; Hot mix asphalt; Performance; Strain (Mechanics); Superpave; Test procedures
• Identifier Terms: Iowa Department of Transportation; Nottingham Asphalt Tester
• Uncontrolled Terms: Energy ratio; Flow number; Moisture sensitivity test; Vacuum saturation
• Subject Areas: Highways; Materials; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01041452
• Record Type: Publication
• Files: TRIS
• Created Date: Jan 30 2007 1:29PM