Evaluation of Moisture Damage in Asphalt Mixtures at Macro- and Nanoscales

AbstractThe aim of this study was to examine the effects of different additives on the moisture resistance of asphalt binders using atomic force microscopy (AFM), and to correlate the results with those obtained in macroscale tests. To this end, AFM force spectroscopy was conducted on neat and polym...

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Bibliographic Details
Published in:Journal of materials in civil engineering 2021-12, Vol.33 (12)
Main Authors: Nazzal, Munir D, Abu Qtaish, Lana, Al-Hosainat, Ahmad, Abu Talha, Sk, Kaya, Savas, Abbas, Ala R
Format: Article
Language:English
Subjects:
Additives
Adhesive bonding
Asphalt
Asphalt mixes
Atomic force microscopy
Bonding strength
Building materials
Civil engineering
Cracking (fracturing)
Moisture resistance
Polymers
Stress concentration
Technical Papers
Tensile strength
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Summary:AbstractThe aim of this study was to examine the effects of different additives on the moisture resistance of asphalt binders using atomic force microscopy (AFM), and to correlate the results with those obtained in macroscale tests. To this end, AFM force spectroscopy was conducted on neat and polymer-modified asphalt binders produced using various warm mix asphalt (WMA) technologies. The technologies considered included Sasobit, Advera, foamed WMA, and Evotherm M1. Furthermore, the asphalt mixtures were prepared using the considered asphalt binders and were tested using the AASHTO T 283 test. The results of this study show that the most significant factor affecting the AFM adhesive forces of asphalt binders is the use of polymer additives. However, the interactions between various chemical groups in asphalt binders and the considered additives differ. Finally, it was found that the effect of aggregate-binder adhesive bonds on indirect tensile strength is greater than that of the binder’s cohesive bonds, as the cracking in this AASHTO T 283 test has more tendency to occur at the interface between the aggregate and the binder due to the high stress concentration.
ISSN:0899-1561
1943-5533
DOI:10.1061/(ASCE)MT.1943-5533.0003993