Dr. Hongyan Ma is an assistant professor of civil engineering in Missouri University of Science and Technology. He received his PhD in Civil Engineering from the Hong Kong University of Science and Technology in 2013. Before joining Missouri S&T in October 2015, he worked as a Post-doctoral Fellow in HKUST for two and a half years. His Research interests include phase change functional materials, novel binder materials hydration kinetics of cementitious materials, etc. Dr. Ma has published over

Abstract:

To reduce the carbon emission and achieve high-performance, contemporary concrete normally employs multi-component cementitious materials as the binder. This means that supplementary cementitious materials, e.g. fly ash, ground granulated blast-furnace slag and silica fume, are used to partially replace portland cement in the mix proportion of concrete. This makes the hydration reactions and microstructure more complicated, and brings difficulties to the prediction of properties. In this talk, the speaker will present his study on quantitative characterization of the hydration kinetics of binary cementitious materials. Computer models have been developed based on the kinetics to simulate the microstructure of concrete at different scales. How to use these models to simulate the microstructures of the hydration products layers, hardened cement paste and interfacial transition zone will be introduced. A multi-scale scheme for the computation of transport properties, developed based on the microstructural representation and a modified random walk algorithm, will also be described. In addition, the speaker will also briefly introduce his on-going work in smart and functional materials and systems.