FATIGUE ANALYSIS OF 12 BRAZILIAN ASPHALT BINDERS AND MIXTURES USING
VISCOELASTIC CONTINUUM DAMAGE THEORY
- Evelyn Paniz Possebon,
- Silvio Lisboa Schuster,
- Victória Nunes-Ramos,
- Luciano Pivoto Specht,
- Deividi da Silva Pereira
Silvio Lisboa Schuster
Universidade Federal de Santa Maria
Author ProfileLuciano Pivoto Specht
Universidade Federal de Santa Maria
Author ProfileDeividi da Silva Pereira
Universidade Federal de Santa Maria
Author ProfileAbstract
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Fatigue characterization of asphalt mixtures is imperative for
predicting pavement performance. Since cracking begins in asphalt
binders, determining their fatigue properties helps establish
cause-and-effect relationships with cracking in mixtures and pavements.
This study analyzes the fatigue of 12 Brazilian asphalt binders and
mixtures using the Linear Amplitude Sweep (LAS) test for binders and the
Direct Tension Cyclic Fatigue test for mixtures. Results were
interpreted with Simplified Viscoelastic Continuous Damage theory
(S-VECD) and a pavement was simulated using FlexPAVE
TM software. Findings indicate that binder type alone
does not predict fatigue class through the fatigue factor of binder
(FFB), necessitating rheological damage analysis. Most mixtures showed
good performance in pavement simulations, with fatigue factor of
mixtures (FFM) and fatigue classes not being sufficient for predicting
fatigue performance. A linear correlation was found between FFB and FFM
but not between FFB and simulated damage (N/Nf), though higher FFB
typically result in lower N/Nf.30 Aug 2024Submitted to Fatigue & Fracture of Engineering Materials & Structures 31 Aug 2024Submission Checks Completed
31 Aug 2024Assigned to Editor
19 Sep 2024Reviewer(s) Assigned