Time：September 4th, 14：00-16:00

Location：Building Anzhong, Rm A807

Abstract：The production of Portland cement, the primary binder of concrete, contributes to ~8% of global anthropogenic CO2 emissions. Partial cement replacement by vitreous (alumino) silicates sourced from industrial byproducts and other additives decarbonizes concrete products at scale. This decarbonation approach typically alters the structure of calcium silicate hydrate (C-S-H), the key binding phase of concrete, at multiple length scales. Understanding the structure and mechanical properties of C-S-H is critical to optimizing the performance of low-carbon concrete. The microstructure and mechanical properties of C-S-Hs in low-carbon concrete have been well understood and optimized to the limits. However, the nanostructure and nanomechanical properties of C-S-Hs remain debated. Advanced characterization techniques are powerful to unveiling the nanostructure and intrinsic mechanical properties of C-S-Hs. The experimental studies of C-S-Hs at the nanoscale are important for validating computational models and micromechanical properties of various cement-based materials.

Biography：李嘉奇将于2025年1月入职美国密歇根大学安娜堡土木与环境工程系任助理教授。李博士2019年于加州大学伯克利分校获博士学位。以一作/通讯发表期刊论文25篇,其中12篇发表于领域顶级期刊Cement and Concrete Research,其文章总引用超2700次, h-index 33 (Google Scholar)。李博士曾获全球2%高被引科学家,劳伦斯利弗莫尔国家实验室Ernest Lawrence Fellowship独立项目负责人, Early Career奖,作为PI/co-PI累计获得科研经费超700万美元。欢迎有意向攻读全日制博士学位、博士后、联培学生联系。