TY - JOUR
T1 - Early-age performance characterization of hot-mix asphalt overlay with varying amounts of asphalt binder replacement
AU - Wu, Shenghua
AU - Al-Qadi, Imad L.
AU - Lippert, David L.
AU - Ozer, Hasan
AU - Luque, Arturo F.Espinoza
AU - Safi, Fazal R.
N1 - Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2017/10/30
Y1 - 2017/10/30
N2 - This study examined five field projects in Illinois, with eight different surface mixes having varying asphalt binder replacement (ABR) achieved by using binders from recycled asphalt shingles (RAS) and reclaimed asphalt pavement (RAP). The performance testing was conducted on plant-mixed laboratory-compacted (PMLC) specimens and consisted of dynamic modulus, overlay tester, Illinois Flexibility Index Test (I-FIT), flow number, and Hamburg wheel tracking tests. The early-age field performance was evaluated, and correlation with performance tests was conducted. Results showed that ABR, asphalt content, and binder grade have effects on rutting and cracking resistance. No rutting issues were found with any of the tested mixes. The flexibility index (FI) values of field cores were higher than PMLC specimens, as no specimen thickness and air void corrections were applied at this time. I-FIT is recommended as a simple performance test to screen and distinguish between mixes for potential cracking.
AB - This study examined five field projects in Illinois, with eight different surface mixes having varying asphalt binder replacement (ABR) achieved by using binders from recycled asphalt shingles (RAS) and reclaimed asphalt pavement (RAP). The performance testing was conducted on plant-mixed laboratory-compacted (PMLC) specimens and consisted of dynamic modulus, overlay tester, Illinois Flexibility Index Test (I-FIT), flow number, and Hamburg wheel tracking tests. The early-age field performance was evaluated, and correlation with performance tests was conducted. Results showed that ABR, asphalt content, and binder grade have effects on rutting and cracking resistance. No rutting issues were found with any of the tested mixes. The flexibility index (FI) values of field cores were higher than PMLC specimens, as no specimen thickness and air void corrections were applied at this time. I-FIT is recommended as a simple performance test to screen and distinguish between mixes for potential cracking.
KW - Asphalt binder replacement
KW - Field cores
KW - Flexibility index
KW - Performance
KW - Performance characterization
KW - Plant mixed laboratory compacted (PMLC)
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U2 - 10.1016/j.conbuildmat.2017.07.114
DO - 10.1016/j.conbuildmat.2017.07.114
M3 - Article
AN - SCOPUS:85024860146
SN - 0950-0618
VL - 153
SP - 294
EP - 306
JO - Construction and Building Materials
JF - Construction and Building Materials
ER -