Laboratory evaluation of antioxidants for asphalt binders

✍ Scribed by Alex K. Apeagyei

• Book ID: 104017314
• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 466 KB
• Volume: 25
• Category: Article
• ISSN: 0950-0618
• DOI: 10.1016/j.conbuildmat.2010.06.058

✦ Synopsis

A laboratory study was carried to investigate whether certain antioxidants could be used to reduce agehardening in asphalt binders. Several additives including: Vitamin E, Irganox 1010, Irgafos P-EPQ, carbon black, hydrated lime, and DLTDP/furfural, were evaluated. The modified asphalt binders were subjected to two accelerated oxidative aging regimes in the laboratory. Short-term oxidative aging of the binders was simulated using a rolling thin film oven while long-term aging was performed using a pressure aging vessel. The effects of aging on the binders were evaluated based on changes in rheological properties of asphalt binders undergoing oxidative aging. Binders modified with a combination of furfural and DLTDP was found to posses the lowest aging index. The antioxidant-treated binders exhibited improved performance at both high and low pavement temperatures.