@inproceedings{7e28c604c3a44762b3649eb88aa217f2,
title = "Life-cycle assessment of using sulfur-extended asphalt (SEA) in pavements",
abstract = "With the excess of sulfur by-product in many oil and gas producing countries, engineers must find new markets that can successfully use this by-product. One application of using excess sulfur by-product has emerged in the use of sulfur as a partial substitute for bitumen in roadways. This sulfur-extend asphalt (SEA) can be used to replace 20-40% by mass of bitumen in dense-graded and warm-mix asphalt concrete mixtures, acting as an asphalt extender and mix stabilizer. The primary objective of this research is to evaluate the environmental impact of using SEA mixtures in pavements compared to that of other asphalt concrete mixes used in the Kingdom of Saudi Arabia (KSA). A comprehensive life-cycle assessment (LCA) was conducted in this study. The assessment considered the entire life-cycle of the pavement from production, use, maintenance and rehabilitation, end-of-life treatment, recycling, and final disposal (i.e., cradle to grave), using guidelines from the International Organization for Standardization (ISO 14040). The inventory databases and LCA framework developed were incorporated into a software developed as part of the study, sulfur extended asphalt life cycle tool (SEL2ECT 1.0). A series of case studies were investigated as a part of this study. Four different pavement designs and life-cycle scenarios were evaluated using SEL2ECT 1.0. The case studies showed that the use of SEA modified mixture can result in some reduction in environmental impacts over similar conventional mixture depending on the performance and future rehabilitations of pavement.",
keywords = "Life-cycle assessment (LCA), Pavement, Sulfur",
author = "R. Yang and H. Ozer and Y. Ouyang and Alarfaj, {A. H.} and K. Islam and Khan, {M. I.} and Khan, {K. M.} and Shalabi, {F. I.}",
note = "Funding Information: This research was financially by the Saudi Arabian Oil Company {"}Saudi Aramco,{"} through the Saudi Aramco Chair on Asphalt Pavement at King Faisal University, KSA. Publisher Copyright: {\textcopyright} 2019 American Society of Civil Engineers.; International Airfield and Highway Pavements Conference 2019: Innovation and Sustainability in Highway and Airfield Pavement Technology ; Conference date: 21-07-2019 Through 24-07-2019",
year = "2019",
doi = "10.1061/9780784482476.020",
language = "English (US)",
series = "Airfield and Highway Pavements 2019: Innovation and Sustainability in Highway and Airfield Pavement Technology - Selected Papers from the International Airfield and Highway Pavements Conference 2019",
publisher = "American Society of Civil Engineers (ASCE)",
pages = "183--192",
editor = "Al-Qadi, {Imad L.} and Hasan Ozer and Andreas Loizos and Scott Murrell",
booktitle = "Airfield and Highway Pavements 2019",
}