TY - GEN
T1 - Evaluating the Effect of Binder Aging and Mineral Fillers on Moisture Susceptibility of Asphalt Concrete Using Surface Free Energy
AU - Al Basiouni Al Masri, Z.
AU - Alarab, A.
AU - Chehab, G. R.
AU - Tehrani-Bagha, A. R.
PY - 2019/1/1
Y1 - 2019/1/1
N2 - The concept of surface free energy was utilized to assess the effect of binder aging, mineral fillers, and aggregate type on the moisture damage resistance of asphalt concrete. A known methodology was used to quantify the dry and wet adhesive bond energies between four types of asphalt mastics and two types of aggregates. Furthermore, the effect of binder aging was evaluated by testing asphalt mastics with different aging conditions: non-aged, RTFO-aged (short-term aging), and PAV-aged (long-term aging). The compatibility ratio (CR) was then quantified for each mastic-aggregate combination and used as an indicator of moisture resistance of asphalt mixtures. Results confirmed that granite aggregates are more prone to moisture damage than limestone aggregates. Furthermore, cement and lime mastics enhanced the resistance of the system to moisture damage compared to limestone filler, which resulted in higher moisture susceptibility. Finally, results also revealed that aged mastics lead to lower CR, which suggests that moisture susceptibility of asphalt mixtures increases as the pavement ages.
AB - The concept of surface free energy was utilized to assess the effect of binder aging, mineral fillers, and aggregate type on the moisture damage resistance of asphalt concrete. A known methodology was used to quantify the dry and wet adhesive bond energies between four types of asphalt mastics and two types of aggregates. Furthermore, the effect of binder aging was evaluated by testing asphalt mastics with different aging conditions: non-aged, RTFO-aged (short-term aging), and PAV-aged (long-term aging). The compatibility ratio (CR) was then quantified for each mastic-aggregate combination and used as an indicator of moisture resistance of asphalt mixtures. Results confirmed that granite aggregates are more prone to moisture damage than limestone aggregates. Furthermore, cement and lime mastics enhanced the resistance of the system to moisture damage compared to limestone filler, which resulted in higher moisture susceptibility. Finally, results also revealed that aged mastics lead to lower CR, which suggests that moisture susceptibility of asphalt mixtures increases as the pavement ages.
UR - https://www.scopus.com/pages/publications/85073905820
U2 - 10.1061/9780784482469.031
DO - 10.1061/9780784482469.031
M3 - Conference article in proceedings
AN - SCOPUS:85073905820
T3 - Airfield and Highway Pavements 2019: Testing and Characterization of Pavement Materials - Selected Papers from the International Airfield and Highway Pavements Conference 2019
SP - 302
EP - 312
BT - Airfield and Highway Pavements 2019
A2 - Al-Qadi, Imad L.
A2 - Ozer, Hasan
A2 - Loizos, Andreas
A2 - Murrell, Scott
PB - American Society of Civil Engineers
T2 - International Airfield and Highway Pavements Conference
Y2 - 21 July 2019 through 24 July 2019
ER -