应土木工程与力学学院、西部灾害与环境力学教育部重点实验室邀请，加拿大渥太华大学王迪 博士将于2024年7月9日做学术报告，欢迎广大师生参加。
- 报告题目：Alternative characterization method of asphalt binders at low temperatures
- 报 告 人：王迪 博士
- 报告时间：2024年7月9日（星期二） 10: 15-11: 00
- 报告地点：祁连堂 327
- 主 持 人：任君平 研究员
报告人简介
Dr. Di Wang is currently an Assistant Professor at the Department of Civil Engineering, University of Ottawa, Canada. Prior to joining uOttawa, he worked as a postdoc researcher at the Technical University of Braunschweig (Germany) and Aalto University (Finland), respectively. In 2022, he was awarded the National Scientific Qualification (habilitation) to function as an Associate Professor at any Italian university. He hosted and participated in 28 academic and industrial projects in Europe. As a result, he has published more than 120 scientific contributions, including more than 60 journal papers. In addition, he has participated in more than 20 international academic associations, and he has won several academic awards. His current research interests include sustainable, durable, and climate resilience road infrastructure in cold regions; solid implementation in asphalt pavement.
报告摘要
The possibility of using the Dynamic Shear Rheometer (DSR) as an alternative method to the Bending Beam Rheometer has been attempted at low temperatures by several researchers and institutions. However, there are still open questions, such as sample loading protocol, measurement gap, and thermal history. In this present study, a 4 mm-DSR method with 3 mm gap was proposed first. A special butterfly silicone mold was fabricated, and the corresponding sample loading procedure was then developed. Then, a modulus shift factor bT is applied to the modulus data to mitigate the effect of the glass transition temperature. Next, five different asphalt binders from Germany were measured with this newly proposed DSR method and BBR for validation purposes; and correlations between these two methods were then generated. Finally, several Finnish local long-term aged asphalt binders were used to validate the existing relations between 4mm-DSR and BBR.