Correlating the Asphalt-Binder BBR Test Data to the HMA (ML-OT) Fracture Properties

AbstractAn asphalt-binder is one of the key constituent elements that significantly influences and controls the fracture behavior and cracking performance of hot-mix asphalt (HMA). In particular, the low-temperature rheological properties of asphalt-binders are critical in terms of improving the HMA...

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Bibliographic Details
Published in:Journal of materials in civil engineering 2021-09, Vol.33 (9)
Main Authors: Walubita, Lubinda F, Fuentes, Luis, Tanvir, Hossain, Chunduri, Harshavardhan R, Dessouky, Samer
Format: Article
Language:English
Subjects:
Asphalt
Building materials
Civil engineering
Cracking (fracturing)
Data storage
Flexible pavements
Heat treating
Laboratories
Laboratory tests
Low temperature
Pavement overlays
Rheological properties
Rheology
Stiffness
Technical Papers
Temperature
Tensile strain
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Summary:AbstractAn asphalt-binder is one of the key constituent elements that significantly influences and controls the fracture behavior and cracking performance of hot-mix asphalt (HMA). In particular, the low-temperature rheological properties of asphalt-binders are critical in terms of improving the HMA fracture properties in the laboratory and ultimately mitigating cracking in the field. The bending beam rheometer (BBR) is one of the most widely used laboratory test methods for evaluating and quantifying the asphalt-binder behavior at low temperatures, mostly using the stiffness (S) and m-value parameters. Using the Texas flexible pavements and overlays database, namely, the Texas data storage system (DSS), as the primary data source, this study was conducted to correlate the asphalt-binder low-temperature rheological properties (measured using the BBR) to the HMA fracture properties. The HMA fracture properties were measured in the laboratory using the monotonic-loading overlay tester (ML-OT). In general, the asphalt-binder low-temperature rheological properties [particularly the stiffness (S)] exhibited promising potential to predict the HMA fracture properties, namely, the tensile strain (εt) and fracture energy index (FE Index), with a coefficient of determination (R2) greater than 60%.
ISSN:0899-1561
1943-5533
DOI:10.1061/(ASCE)MT.1943-5533.0003866