演讲嘉宾

Dr. Zigeng Wang, Associate Professor

College of Architecture and Civil Engineering, Beijing University of Technology, Beijing, China

Biography: Dr. Zigeng Wang is an Associate Professor at Beijing University of Technology and holds a Ph.D. in Civil Engineering from Michigan Technological University, USA. His research focuses on the preparation and analysis of high performance concrete and novel binding materials, with expertise in solid-liquid coupling modeling methods, constitutive relationship analysis and modification, and digital representation of mechanical properties. He is an expert member of the Cement-Based Rheology Testing Technology Committee under the Testing Technology Branch of the China Society of Silicate, affiliated with the International Advanced Materials Association and China. Dr. Wang has presided over and participated in more than 20 scientific research projects at various levels, including national-level initiatives. He has published one monograph, over 70 high-quality academic papers, and nearly 10 patents, contributed to the development of three industry standards, and received two second prizes for scientific and technological progress at the provincial/ministerial level.

Topic: Performance Study of Low Carbon, Fireproof Magnesium Oxysulfate Cement

Abstract: Magnesium Oxysulfate Cement (MOSC) is a gas-setting magnesium-based cement manufactured from light-calcined magnesium oxide and magnesium sulfate heptahydrate, featuring lightweight properties, fire resistance, moisture resistance, anti-corrosion performance, and other advantages. The current mainstream production process for heptahydrate magnesium sulfate, a raw material in magnesia cement, consumes high energy and generates significant carbon dioxide emissions. However, there has been no research investigating alternative sources for magnesium sulfate heptahydrate. To address this issue, this study aims to reduce embodied carbon emissions at the raw material stage by proposing the in-situ preparation of MgSO₄ solutions using brucite—a natural magnesium-based material—through direct reaction with dilute sulfuric acid or sulfate salts, thereby replacing conventional magnesium sulfate heptahydrate. The systematic analysis examined its effects on MOSC's flowability, setting time, strength, thermal conductivity, fire resistance, pore structure, and hydration product evolution patterns. Additionally, the carbon emissions throughout the entire lifecycle of low carbon MOSC were calculated, providing a theoretical foundation and technical support for developing this cement system.

Dr. Kung-Chung Hsu, Professor

Department of Chemistry, National Taiwan Normal University, Taiwan

Biography: Dr. Kung-Chung Hsu received PhD in Department of Chemical Engineering at The Penn State University, in 1985. He worked as a senior scientist in the R & D Department of China Steel Corp. in 1985-1990. He was an Associated Professor in 1990-1996, Professor in 1996-2020, and is now an Emeritus Professor in the Department of Chemistry of National Taiwan Normal University, Taipei, Taiwan. Dr. Hsu has research interests in (1) preparation and application of dispersing agents in ceramic materials, (2) preparation and development of superplasticizer and self-curing agents in concrete, and (3) preparation and application of nano powder and graphene/polymer composites. So far he has published more than 50 peer-reviewed papers and obtained over 25 patents.

Topic: Synthesis of Novel Hydrogels as Curing Agents for Mortars

Abstract: Hydrogel is a crosslinked polymer which can absorb lots of water. In this study, seval novel hydrogels were prepared and used as curing agents for mortars. The chemical structure of these hydrogels were characterized by means of FTIR spectroscopy. The water absorbency of them were measured in salt solutions. The effects of reactant ratio, initiator and crosslinking agent content on the water absorbency of these hydrogels were studied. The hydrogels were then added in mortars. Their effects on the material properties of mortars were determined and discussed.