TY - JOUR
T1 - Evaluation of various factors affecting mix design of sulfur-extended asphalt mixes
AU - Gul, Muhammad Aniq
AU - Khan, Kaffayatullah
AU - Islam, Md Kamrul
AU - Shalabi, Faisal I.
AU - Ozer, Hasan
AU - Hajj, Ramez
AU - Bhasin, Amit
N1 - Funding Information:
The authors acknowledge the Saudi Aramco Chair in Asphalt Pavement at King Faisal University and Saudi Aramco Oil Company – Kingdom of Saudi Arabia for funding portions of this study.
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/7/5
Y1 - 2021/7/5
N2 - Several laboratory and field studies from the last five decades, predominantly from the 1970s and 80s, have demonstrated that elemental sulfur is a viable binding material that can be used to partially or fully replace conventional asphalt binder in pavement construction applications. The main goal of this study was to determine and demonstrate the impact of different mix design factors on the performance of sulfur extended asphalt (SEA). These factors include sulfur content, the use of polymer modified versus unmodified base binder, and the method of sulfur addition to the mix. The Hamburg Wheel Tracking test was used to characterize rutting resistance and the Illinois Flexibility Index Test (I-FIT) was used to characterize the cracking performance at both short and long-term aging conditions. Overall, sulfur was found not to compromise the very good rutting resistance of the mix, and optimum binder and sulfur contents were determined based on long term cracking resistance of the mix. It is notable that the optimum binder content did not change when sulfur was used based on the long-term cracking resistance. Results, although with a limited set of materials, demonstrate the feasibility of replacing 30% of asphalt binder with elemental sulfur to produce SEA mixes.
AB - Several laboratory and field studies from the last five decades, predominantly from the 1970s and 80s, have demonstrated that elemental sulfur is a viable binding material that can be used to partially or fully replace conventional asphalt binder in pavement construction applications. The main goal of this study was to determine and demonstrate the impact of different mix design factors on the performance of sulfur extended asphalt (SEA). These factors include sulfur content, the use of polymer modified versus unmodified base binder, and the method of sulfur addition to the mix. The Hamburg Wheel Tracking test was used to characterize rutting resistance and the Illinois Flexibility Index Test (I-FIT) was used to characterize the cracking performance at both short and long-term aging conditions. Overall, sulfur was found not to compromise the very good rutting resistance of the mix, and optimum binder and sulfur contents were determined based on long term cracking resistance of the mix. It is notable that the optimum binder content did not change when sulfur was used based on the long-term cracking resistance. Results, although with a limited set of materials, demonstrate the feasibility of replacing 30% of asphalt binder with elemental sulfur to produce SEA mixes.
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U2 - 10.1016/j.conbuildmat.2021.123199
DO - 10.1016/j.conbuildmat.2021.123199
M3 - Article
AN - SCOPUS:85104572404
SN - 0950-0618
VL - 290
JO - Construction and Building Materials
JF - Construction and Building Materials
M1 - 123199
ER -