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Evaluation of Asphalt Mixture Low-Temperature Performance in Bending Beam Creep Test

Faculty of Civil and Environmental Engineering, Gdansk University of Technology, 80-233 Gdansk, Poland
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Materials 2018, 11(1), 100; https://doi.org/10.3390/ma11010100
Received: 24 November 2017 / Revised: 29 December 2017 / Accepted: 8 January 2018 / Published: 10 January 2018
(This article belongs to the Section Structure Analysis and Characterization)
Low-temperature cracking is one of the most common road pavement distress types in Poland. While bitumen performance can be evaluated in detail using bending beam rheometer (BBR) or dynamic shear rheometer (DSR) tests, none of the normalized test methods gives a comprehensive representation of low-temperature performance of the asphalt mixtures. This article presents the Bending Beam Creep test performed at temperatures from −20 °C to +10 °C in order to evaluate the low-temperature performance of asphalt mixtures. Both validation of the method and its utilization for the assessment of eight types of wearing courses commonly used in Poland were described. The performed test indicated that the source of bitumen and its production process (and not necessarily only bitumen penetration) had a significant impact on the low-temperature performance of the asphalt mixtures, comparable to the impact of binder modification (neat, polymer-modified, highly modified) and the aggregate skeleton used in the mixture (Stone Mastic Asphalt (SMA) vs. Asphalt Concrete (AC)). Obtained Bending Beam Creep test results were compared with the BBR bitumen test. Regression analysis confirmed that performing solely bitumen tests is insufficient for comprehensive low-temperature performance analysis. View Full-Text
Keywords: low temperatures; bitumen; asphalt mixture; Bending Beam Creep test; BBR test low temperatures; bitumen; asphalt mixture; Bending Beam Creep test; BBR test
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Pszczola, M.; Jaczewski, M.; Rys, D.; Jaskula, P.; Szydlowski, C. Evaluation of Asphalt Mixture Low-Temperature Performance in Bending Beam Creep Test. Materials 2018, 11, 100.

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