Flow Number parameter as a performance criteria for asphalt mixtures rutting: evaluation to mixes applied in Brazil Southern region

Faccin, Cléber; Specht, Luciano Pivoto; Schuster, Silvio Lisboa; Boeira, Fernando Dekeper; Bueno, Lucas Dotto; Brondani, Chaveli; Pereira, Deividi da Silva; Nascimento, Luís Alberto Herrmann do

doi:10.1080/10298436.2021.1880580

Cited by 9 publications

(1 citation statement)

References 5 publications

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“…Over the past few decades, several testing methods and analysis protocols have been proposed and adopted in the laboratory to characterize the rutting resistance of asphalt mixtures. These performance tests include the APA [12], Hamburg wheel tracking [13], French simulator [14], and uniaxial repeated load test to determine the Flow Number [15]. However, these procedures typically employ pass-fail criteria based on fixed testing conditions, which limits their ability to capture the complex nature of permanent deformation under varying field conditions.…”

Section: Rutting Performance Evaluationmentioning

confidence: 99%

Rutting Performance Evaluation of BMD Surface Mixtures with Conventional and High RAP Contents under Full-Scale Accelerated Testing

Tong,

Habbouche,

Flintsch

et al. 2023

Materials

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The balanced mix design (BMD) constitutes a significant step forward in the pursuit of better-performing asphalt mixtures. This approach/framework offers increased innovative opportunities for the proper design and production of engineered asphalt mixtures without the need to strictly adhere to traditional volumetric requirements. The primary objective of this paper is to conduct a comprehensive investigation of the permanent deformation (rutting) behavior of surface mixtures (SMs) with conventional and high reclaimed asphalt pavement (HRAP) contents through full-scale accelerated testing under incremental loading conditions while accounting for the environmental aging effect. HRAP SMs were designed in this study, marking the initial application of Virginia Department of Transportation (VDOT) BMD special provisions, with attempts to incorporate 45% and even 60% RAP. Results showed that all BMD HRAP mixtures exhibited higher rut depths compared to the control mixture, which can be attributed to the inclusion of high binder contents aimed at enhancing cracking resistance. The asphalt pavement analyzer (APA) rut test and the stress sweep rutting tests were performed on mixtures sampled during production. Correlation analysis revealed significant and strong positive correlations between accelerated pavement testing (APT) and the multilevel laboratory rutting performance tests considered in this study. Finally, while acknowledging the limitations and all the assumptions considered in this study, the correlation analysis recommended refining the VDOT BMD APA rut depth threshold by lowering the current limit of 8 mm to 7 mm to ensure good performing mixtures from a rutting point of view.

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