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Scientific Papers

Vol. 18 No. 31 (2016): Journal 31

Effect of Temperature on the Fatigue Evaluation of Asphalt Binders

DOI:
https://doi.org/10.15517/n0jrq144
Submitted
November 5, 2025
Published
2025-11-05

Abstract

The fatigue cracking is one of the most common distresses in flexible pavements, which is characterized by the connection of longitudinal and transverse cracks caused by the tensile stresses generated in the base of the asphalt layer, produced by the heavy traffic loads. This study evaluates the influence of temperature on fatigue failure in asphalt binders, according to two test methods: PG Grade and the Linear Amplitude Sweep (LAS) test. The research evaluates three asphalt binders, which correspond to three different applications in the asphalt mix: PG64-16 (conventional mix), PG76-16 (modified mix with polymer SBS) and PG88-22 (warm mix). The results show the difference in behavior of the binders when evaluated at different temperatures (37, 34, 28, and 20 °C) considering two types of aging: short and long term. Additionally, the transition temperature between the solid-elastic and the liquid-viscous part of the binder is explored, as a parameter for selecting a suitable temperature for the fatigue test. The results indicate a variation in the trend of the binder with most resistance to fatigue failure, with the change in temperature, particularly when the asphalt is subjected to temperatures above or below its transition point (temperature). According to the fatigue evaluation in the asphalt mixture, the transition temperature seems to be a good criteria to select an adequate temperature to evaluate fatigue in asphalt binders; nevertheless, additional validations with different materials must be done to support the results.

References

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