|学术讲座：Understanding of Relationships among Chemistry, Microstructure, and Mechanical Properties of Asphalt Binders|
主讲人：Mingjiang Tao, Ph.D., P.E., Associate Professor
Mingjiang Tao received BS in civil engineering from Fuzhou University, China in 1997 and a MS in geotechnical enigneering from Tongji University, China in 2000, and Ph.D. in civil engineering from Case Wester Reserve University, USA, in 2003, respectively. He joined Worcester Polytechnic Institute in 2007, where he is an Associate Professor and Interim Associate Department Head of civil engineering. He is the author of more than 56 papers on alternative cementitious binders, asphlat concrete, granular materials, and characterization of construction materials at nano- and marco-scales. His research has been funded by the National Science Foundation, Federal Highway Administration, state departments of transportation, and New England Transportation Consortium. Prof. Tao is a Member of the American Society of Civil Engineers and member of Chemical and Mechanical Stabilization Committee (AFS90), Engineering Behavior of Unsaturated Soils Committee, and Physicochemical and Biological Processes in Soils (AFP40) of the Transportation Research Board, and member of Sigma Xi.
Asphalt binder, the residue from the distillation process of crude oils, is one of the major constituents used in asphalt concrete and roofing systems. Acting as a glue that binds all aggregates together, asphalt binder’s physical and mechanical properties significantly affect the overall performance of asphalt concrete, which are largely governed by binder’s chemistry. In this talk, I will share some results from our research efforts that aim to fill the knowledge gap in the chemical-microstructure-mechanical link of asphalt binder. To this end, samples were prepared from two pristine asphalt binders and their derivatives. Their microscopic morphology and mechanical contrast among the multiphase features were evaluated using atomic force microscopy (AFM), while their bulk thermal and rheological properties were investigated with modulated differential scanning calorimetry (MDSC) and a dynamic shear rheometer (DSR), respectively. These findings enhance our understanding of the complicated relationships among chemistry, microstructure, and mechanical properties of asphalt binders.