STUDY ON EVALUATION METHOD OF FATIGUE DAMEGE STATE FOR ASPHALT MIXTURES USING CUMULATIVE DISSIPATED ENERGY

Abstract

The repeated compressive-tensile test using core-samples taken from asphalt pavement fields is an effective method to assess the damage state of the asphalt layer. For this assessment, characteristics indexes obtained from the test need to be related with the fatigue damage state of the core-sample. The present study investigated the viscoelastic parameters derived from the test data in order to relate the fatigue damage state. The results confirmed that the fatigue damage state of the asphalt mixture could be explained by evaluation of the energy history during the repeated loading. The relationship between cumulative dissipated energy and phase angle in the energy history was useful information for the assessment.