학술논문

Evaluation of effect of moisture on fatigue performance of pavement designed with recycled asphalt mixtures.
Document Type
Article
Source
Canadian Journal of Civil Engineering. 2023, Vol. 50 Issue 1, p1-10. 10p.
Subject
*ASPHALT
*BITUMINOUS materials
*ASPHALT pavement recycling
*FATIGUE limit
*PAVEMENTS
*MOISTURE
*CRACKING of pavements
*HYGROTHERMOELASTICITY
Language
ISSN
0315-1468
Abstract
The moisture resistance of dense- and gap-graded bituminous mixes prepared with the replacement of virgin aggregates and fresh bitumen with reclaimed asphalt pavement (RAP) was evaluated using indirect tensile strength (ITS) and resilient modulus (Mr). The mechanistic analysis was performed to estimate the effect of moisture resistance on the fatigue performance of thin and thick pavement sections designed with dense- and gap-graded bituminous mixes. The ITS ratio and Mr ratio results indicate that the resilient modulus ratio is more sensitive to moisture damage in bituminous mixes than the ITS ratio. In addition, the results of the fatigue life ratio indicated that the gap-graded mix prepared with different RAP content has better resistance to moisture-related cracking in thick pavement sections than the dense-graded mix. However, the effectiveness of gap-graded and dense-graded mixes prepared with different RAP content on moisture-related cracking depended on the subgrade strength for thin pavement sections. [ABSTRACT FROM AUTHOR]