VI. RESEARCH WORK DONE IN ACADEMIC INSTITUTIONS RELATED TO THESIS WORK

B. PAVEMENT ENGINEERING AND PAVING MATERIALS
6. Characterization of Healing of Asphalt Mixtures
Date of Start

July 2002
Indian Institute of Technology Madras (R, C)

 

Scope and Objectives

• To quantify healing of asphalt mixtures through experimental studies.
• To model healing of asphalt mixtures based on a thermodynamic frame work and corroborate it through the experimental studies.

 
Methodology
Cyclic triaxial tests were carried out to quantify asphalt mixtures in the laboratory with varied confinement conditions. A healing model based on the continuum theory of “multiple natural configurations” will be used to corroborate the laboratory investigations.
 
Findings and Conclusions
The results obtained through laboratory investigations have adequately proved the healing of asphalt mixtures with rest periods. The amount of healing was observed to be dependent on the air voids, loading time, lateral pressure applied on the specimen in the triaxial test and also on the magnitude of the lateral pressure.