Avaliação da influência do envelhecimento e da temperatura nas características viscoelásticas de ligantes asfálticos

Authors

DOI:

https://doi.org/10.14295/transportes.v28i1.1897

Keywords:

Linear viscoelastic region, Modified asphalt, Rheological properties, Short-term aging, Rheology.

Abstract

The Superior Performing Asphalt Pavements (SUPERPAVE) specifications presented the use of rheological characterization of asphalt binders attributing engineering properties to them. Initially, the rheological characterization was proposed only within the linear viscoelastic region (LVER) due to the complexity of the viscoelastic behavior. It is known that frequency, temperature and aging influence the material stiffness and consequently the LVER. This paper evaluates the effect of the temperature and different aging levels at the LVER of asphalt binders by the strain sweep test using the Dynamic Shear Rheometer (DSR). Aging was performed using the Rolling Thin Film Oven (RTFO). Three different asphalt binders were evaluated: one neat asphalt binder, one modified by styrene-butadiene-styrene (SBS), and the last one was a highly modified (HiMA). By the results, it is possible to conclude that lower temperatures and higher aging levels reduce the LVER. Modified binders presented higher LVER than the conventional binder, mainly at high temperatures.

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References

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Published

2020-04-30

How to Cite

Mazzoni, L. N., Takahashi, M. M., Vasconcelos, K. L., & Bernucci, L. (2020). Avaliação da influência do envelhecimento e da temperatura nas características viscoelásticas de ligantes asfálticos. TRANSPORTES, 28(1), 135–146. https://doi.org/10.14295/transportes.v28i1.1897

Issue

Vol. 28 No. 1 (2020)

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