“Additives in Asphalt” was the topic of Association of Asphalt Paving Technologists’ (AAPT) Fall 2018 webinar series. The series consists of three webinars. The first will discuss additives in asphalt mixtures and will provide the foundation for the second and third webinar. The second will delve into the recent developments of how asphalt binder tests have changed, partially because of additives, in order to better understand modified asphalt binder behavior. Finally, the third webinar will explore what is on the horizon for additives in asphalt, including movement toward fundamental characterization through chemistry, sustainability, and engineered design. Note that price of specific additives will not be discussed specifically in this webinar series as the series will focus more on a fundamental understanding of the role of additives in asphalt.

The first webinar in AAPT’s Fall 2018 webinar series, “Additives in Asphalt,” will begin with foundational information on additives in asphalt. First, additives will be defined and the reasons for using additives will be discussed. Next, various types of additives will be covered for asphalt mixtures, followed by changes we need to consider in the design process of asphalt mixtures when using additives. Finally, there will be a brief survey of how additives perform both in a laboratory setting and then in the field. After this webinar, participants should have a solid understanding of the who, what, when, why, and how of additives in asphalt.