Determination of Bond Strength as a Function of Moisture Content at the Aggregate-Mastic Interface

Moisture infiltration into asphalt mixes can have a negative effect on the material characteristics of the individual components and damages the bond between the components, leading to separation of the aggregates from the asphalt mixture (i.e. stripping). The phenomenon of stripping is a complicated process, which involves a combination of physical, chemical and mechanical processes. In this paper, focus is placed on damage to the aggregate-mastic bond caused by a weakening of the interface due to diffusion of moisture. The adhesive tensile strength of the interface between thin film asphalt mastic and a diabase aggregate substrate is determined via a modified version of ASTM D 4541 Pull-Off Strength of Coatings Using Portable Adhesion Testers. Experimental results of the pull-off test are linked to moisture diffusion simulations via the finite element analysis tool RoAM (Raveling Of Asphaltic Mixtures), developed at Delft University of Technology. On the basis of this combination of experimental measurements and computational analyses, for the first time, bond strength degradation as a function of the amount of moisture at the mastic-aggregate interface is established. The paper gives an extensive description of the proposed methodology and identifies future research on the topic.

• Corporate Authors:

  International Society for Asphalt Pavements

  4711 Clark Avenue, Suite G
  White Bear Lake, MN  United States  55110
• Authors:
  • Copeland, A
  • Youtcheff, J
  • Kringos, N
  • Scarpas, A
  • Mahadevan, S
• Conference:
  • 10TH INTERNATIONAL CONFERENCE ON ASPHALT PAVEMENTS - AUGUST 12 TO 17, 2006, QUEBEC CITY, CANADA
• Publication Date: 2006

Language

• English

Media Info

• Media Type: Print
• Pagination: p. vol1,709-18
• Monograph Title: 10th International Conference on Asphalt Pavements - August 12 to 17, 2006, Quebec City, Canada

Subject/Index Terms

• TRT Terms: Bituminous mixtures; Conferences; Diffusion (Optics); Finite element method; Moisture content; Pull out test; Simulation; Strength of materials; Stripping (Pavements)
• Geographic Terms: Canada
• Subject Areas: Design; Pavements; I22: Design of Pavements, Railways and Guideways; I26: Water Run-off - Freeze-thaw;

Filing Info

• Accession Number: 01084402
• Record Type: Publication
• Source Agency: Transportation Association of Canada (TAC)
• Files: TAC
• Created Date: Jan 16 2008 7:56AM