Fatigue Susceptibility of Asphalt Paving Mixtures Incorporating Random Rest Period and Environmental Factors

The prediction of fatigue damage of bituminous materials has a great importance in the design of asphalt pavements. It is supposed to be accelerated by the combined action of environmental factors and repeated loading. Therefore, it is important to incorporate the environmental conditions in that predicting to ensure a proper design period of the in service pavement structure. This study aims to explore more about the combined effect of Long Term Oven Aging (LTOA) and moisture damage incorporating random rest periods on fatigue susceptibility of asphalt concrete mixtures. The influence of LTOA and moisture was simulated using British Board of Agrément (BBA) protocols and investigated using Indirect Tensile Fatigue Test (ITFT) in controlled strain mode. A 14 mm Dense Bitumen Macadam (DBM) mixture was manufactured using a 40/60 penetration asphalt binder and limestone aggregate. The results of ITFT at both testing temperatures 10°C and 20°C show a decrease in the fatigue resistance of control and LTOA asphalt mixtures after water immersion. Moreover, moisture reduces the stiffness recovery of these mixtures compared to those under dry conditions. On the other hand, there was an unexpected increase in the fatigue life of 14 mm DBM mixtures when these mixtures stiffen due to LTOA.

• Supplemental Notes:
  • This paper was sponsored by TRB committee AFK50 Standing Committee on Structural Requirements of Asphalt Mixtures.
• Authors:
  • Aljubory, Ahmed
  • Airey, G D
  • Grenfell, J R A
• Conference:
  • Transportation Research Board 97th Annual Meeting
  • Location: Washington DC, United States
  • Date: 2018-1-7 to 2018-1-11
• Date: 2018

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; Photos; References; Tables;
• Pagination: 16p

Subject/Index Terms

• TRT Terms: Asphalt concrete; Asphalt mixtures; Fatigue (Mechanics); Moisture damage
• Uncontrolled Terms: Indirect tensile test; Long term oven aging; Rest periods (Materials)
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01661588
• Record Type: Publication
• Report/Paper Numbers: 18-05177
• Files: TRIS, TRB, ATRI
• Created Date: Feb 28 2018 1:25PM