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Open AccessFeature PaperArticle

Analysis of Fatigue and Healing Properties of Conventional Bitumen and Bio-Binder for Road Pavements

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Department of Civil and Building Engineering and Architecture, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy
2
Nynas AB, SE-149 82 Nynäshamn, Sweden
*
Author to whom correspondence should be addressed.
Materials 2020, 13(2), 420; https://doi.org/10.3390/ma13020420
Received: 12 December 2019 / Revised: 10 January 2020 / Accepted: 13 January 2020 / Published: 16 January 2020
The analysis of fatigue behavior of bituminous binders is a complex issue due to several time-temperature dependent phenomena which interact simultaneously, such as damage accumulation, viscoelasticity, thixotropy, and healing. The present research involves rheological measurements aimed at evaluating the fatigue behavior and compares the self-healing capability of two plain bitumen and a bio-binder obtained by partially replacing one of the plain bitumen with a renewable bio-oil. Healing potential was assessed by means of an experimental approach previously implemented for modified bitumen and bituminous mastic and based on the use of a dynamic shear rheometer (DSR). The effects of some variables such as bitumen type, bio-oil addition, and aging on the healing potential of binders were taken into account. Results showed that the above-mentioned method for healing analysis is also suitable for conventional and bio-add binders. Outcomes of the experimental investigation highlight that fatigue and self-healing are mainly dependent on binder consistency and also affected by aging. Finally, the addition of bio-oil may induce even better performances in terms of healing potential compared to conventional bitumen, especially in aged condition. View Full-Text
Keywords: fatigue; self-healing; bitumen; bio-binder fatigue; self-healing; bitumen; bio-binder
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MDPI and ACS Style

Gaudenzi, E.; Cardone, F.; Lu, X.; Canestrari, F. Analysis of Fatigue and Healing Properties of Conventional Bitumen and Bio-Binder for Road Pavements. Materials 2020, 13, 420.

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