Abstract
Flexural fatigue is a process of cumulative damage. It is also one of the main failure modes in asphalt mixtures and flexible pavement structures. This means good prediction of a pavement’s fatigue life will help to develop and improve pavement design procedures. Different approaches have been used to characterise the fatigue behaviour of asphalt including phenomenological-based models, fracture mechanics and dissipated energy methods. This paper evaluates fatigue, paying particular attention to the dissipated energy criteria developed so far for asphalt materials. Two methods have been chosen to measure dissipated energy in tension-compression fatigue tests. Fatigue life obtained from the two different methods is compared with the traditional fatigue failure criterion Nf50, identifing both their advantages and disadvantages. An asphalt mixture has been chosen for the laboratory activity and different tension-compression fatigue tests have been undertaken at 15 Hz, at 20°C at different stress levels, in order to better understand fatigue behaviour of asphalt mixtures.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
