Study of Hot-Mix Asphalt Susceptible to Moisture-Induced Material Loss

Moisture induced damage, in the form of loss of materials under traffic has been an ongoing problem in a few Hot Mix Asphalt (HMA) pavements for Maine Department of Transportation (DOT). A research study was initiated to determine a suitable method to identify moisture susceptible mixes through testing during mix design. Tests included indirect tensile strength, dynamic modulus, seismic modulus, moisture induced stress test (MIST) conditioning, X- ray micro-tomography, analyses of MIST effluent for aggregate gradation and dissolved organic carbon (DOC) content, and Hamburg test. The conclusions are that the use of seismic testing can provide a fast method of identifying moisture susceptible mixes and for consideration of moisture induced damage in structural design, moisture can linger in the pore spaces for a considerable amount of time after conditioning and mixes losing a higher amount of binder during conditioning have lower indirect tensile strength. The recommendations are to consider seismic testing in conjunction with MIST conditioning for regular use, and develop proper conditioning, drying and testing protocols.

• Supplemental Notes:
  • This paper was sponsored by TRB committee AFK40 Standing Committee on Surface Requirements of Asphalt Mixtures. Alternate title: A Study of Hot Mix Asphalt (HMA) Susceptible to Moisture Induced Material Loss.
• Corporate Authors:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • Arepalli, Uma Maheswar
  • Mallick, Rajib B
  • Methisen, Paul
  • Poulikakos, Lily
  • Griffa, Michele
  • Hartmann, Stefan
  • Nener-Plante, Derek
• Conference:
  • Transportation Research Board 96th Annual Meeting
  • Location: Washington DC, United States
  • Date: 2017-1-8 to 2017-1-12
• Date: 2017

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: 19p
• Monograph Title: TRB 96th Annual Meeting Compendium of Papers

Subject/Index Terms

• TRT Terms: Hot mix asphalt; Moisture damage
• Identifier Terms: Maine Department of Transportation; Moisture Induced Stress Tester
• Uncontrolled Terms: Indirect tensile strength; Loss of material; Moisture susceptibility; Seismic testing
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01624790
• Record Type: Publication
• Report/Paper Numbers: 17-04156
• Files: TRIS, TRB, ATRI
• Created Date: Feb 1 2017 1:16PM