Abstract
Many factors affecting pavement performance include variations in binder composition and environmental conditions during asphalt mixture production. Hence, predicting pavement performance is a difficult task. This paper aims to investigate the effects of short term aging on binder viscosity at high temperature. In order to predict the effects of short term aging on the asphalt binder viscosity at high temperatures, a Response Surface Method was performed on the Rotational Viscometer test results. An experimental matrix was planned based on the central composite design for aging duration and test temperature. The test results showed that aging increased the binder viscosity, while increasing test temperature decreased the corresponding value. However, aging effects differ and depend on binder types, test temperatures and aging conditions. It was also found that the Response Surface Method is a fast, effective and reliable method to predict the effects of aging on binder viscosity behaviour at high temperatures.
Highlights
Quality and durability of the pavement depend on the asphalt mixing plants production quality
Short term aging of asphalt binder occurs during mixing, transportation and construction and varies according to variations in binder and aggregate types, mixing and construction duration and environmental conditions
For the Aging Index (AI) case, all the factors are significant except AC, which is discarded from the aging prediction model
Summary
Quality and durability of the pavement depend on the asphalt mixing plants production quality. Short term aging of asphalt binder occurs during mixing, transportation and construction and varies according to variations in binder and aggregate types, mixing and construction duration and environmental conditions. Exposing the mixture to unanticipated conditions such as prolonged exposure to plant burners during mixture production, traffic jam during mixture transportation or construction delays increase the possibility of short-term aging effects severity and change mixture and compaction temperatures. This delay affects binder viscosity and asphalt mixture densification under loading (compactability) which directly influences mixture stiffness and volumetric properties. Characterization of temperature and aging effects on binder viscosity prior to construction allow researchers to enhance pavement performance by resolving some construction distress such as raveling by attaining designed air voids content or required pavement density to develop
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
