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<p>Field performance of asphalt pavements can be affected by several variables, including controllable factors, such as materials used, thickness and air voids of the compacted asphalt layer, binder content; and uncontrollable factors, such as ambient temperature, load, and vehicle speed. The objective of this study was to evaluate how some of those variables (temperature, asphalt layer thickness, wheel load, and traffic speed) affect the fatigue behavior of asphalt pavements in terms of predicted cracked area. Different pavements were considered, and surface courses vary according to the binder and aggregates. Evaluations were performed in terms Linear viscoelastic (LVE) characterization, Fatigue using tension–compression testing, associated to the S-VECD model and prediction cracking with CAP3D-D software, calibrated in Brazilian experimental sections. It was concluded that pavements with amine-based antistripping agent showed lower values of cracked area compared to pavements with neat binder. Pavements with granite aggregate presented lower predicted cracked area values compared to pavements with phonolite aggregate. Most pavements had more unit variations in cracked area due to variation in surface course thickness and temperature. Each ± 1&#xa0;cm variation in asphalt surface course produced approximately the same effect on cracked area as variations of ± 1.1ºC, ± 5.6&#xa0;km/h, or ± 16.6kN of wheel load.</p>

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Prediction of cracked area in asphalt pavements: what are the main variables to consider?

  • 期刊论文

  • 发表日期：

    2025年4月25日

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  • Jorge Luiz Oliveira Lucas Júnior,
  • Lucas Feitosa de Albuquerque Lima Babadopulos,
  • Jorge Barbosa Soares

摘要

Field performance of asphalt pavements can be affected by several variables, including controllable factors, such as materials used, thickness and air voids of the compacted asphalt layer, binder content; and uncontrollable factors, such as ambient temperature, load, and vehicle speed. The objective of this study was to evaluate how some of those variables (temperature, asphalt layer thickness, wheel load, and traffic speed) affect the fatigue behavior of asphalt pavements in terms of predicted cracked area. Different pavements were considered, and surface courses vary according to the binder and aggregates. Evaluations were performed in terms Linear viscoelastic (LVE) characterization, Fatigue using tension–compression testing, associated to the S-VECD model and prediction cracking with CAP3D-D software, calibrated in Brazilian experimental sections. It was concluded that pavements with amine-based antistripping agent showed lower values of cracked area compared to pavements with neat binder. Pavements with granite aggregate presented lower predicted cracked area values compared to pavements with phonolite aggregate. Most pavements had more unit variations in cracked area due to variation in surface course thickness and temperature. Each ± 1 cm variation in asphalt surface course produced approximately the same effect on cracked area as variations of ± 1.1ºC, ± 5.6 km/h, or ± 16.6kN of wheel load.