Quantification of Cohesive Healing of Asphalt Binder and its Impact Factors Based on Dissipated Energy Analysis

It has been accepted that an important property which is, at least partially, responsible for the significant difference between the laboratory and field fatigue behavior, is the effect of healing on asphalt material fatigue performance. Although, in order to characterize the asphalt healing and its mechanism, some studies have been conducted, very few researches have clearly identified how different loading and climate conditions can influence the effect of healing in a quantitative way. In addition, little guidance has been provided on the integration healing into fatigue life prediction and pavement design. As a result, this study develops a research based on the fundamental dissipated energy analysis to quantify the cohesive healing in asphalt binder. An evaluation that is systematic in nature is conducted of the key impact factors on healing under different loading and environmental conditions. Providing a promising way to integrate healing into a more mechanistic based pavement design procedure, a healing rate predictive model and fatigue life prediction model based on binder rheological properties and visco-elastic energy dissipation is developed. Investigating and quantifying the adhesive healing at the aggregate-asphalt interface when aggregates are introduced into the experimental testing is a way in which the methodology used in this study can also be applied.

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  • English

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  • Accession Number: 01355076
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 24 2011 11:48AM