Nanotechnology on cement-based materials: modification and characterization

时间：2016年10月27日上午10:30

地点：地坤楼409

报告人：LI Wengui助理教授

主持人：肖岩 教授

报告内容：The nanoscience and nano-engineering, sometimes called nanomodification, of concrete are terms that have come into common usage and describe two main avenues of application of nanotechnology in concrete research. Nanoscience deals with the measurement and characterization of the nano and microscale structure of cement-based materials to better understand how this structure affects macroscale properties and performance through the use of advanced characterization techniques and atomistic or molecular level modeling. Nano-engineering encompasses the techniques of manipulation of the structure at the nanometer scale to develop a new generation of tailored, multifunctional, cementitious composites with superior mechanical performance and durability potentially having a range of novel properties such as: low electrical resistivity, self-sensing capabilities, self-cleaning, self-healing, high ductility, and self-control of cracks. Concrete can be nano-engineered by the incorporation of nanosized building blocks or objects (e.g., nanoparticles and nanotubes) to control material behavior and add novel properties, or by the grafting of molecules onto cement particles, cement phases, aggregates, and additives (including nanosized additives) to provide surface functionality, which can be adjusted to promote specific interfacial interactions.

报告人简介： Dr Wengui Li is a Lecturer and an ARC DECRA Fellow in School of Civil and Environmental Engineering at University of Technology Sydney, Australia. Dr Li received his Doctoral degree of Structural Engineering in 2013 under a joint program between Northwestern University, USA and Tongji University, China. He is members of American Institute of Concrete (ACI), Concrete Institute of Australia, American Society of Civil Engineers (ASCE) and International Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM). Dr Li's research motivation is to connect materials behaviours of concrete to structures performances. His current research interests include concrete composites, concrete nanotechnology, geopolymer concrete, durability under extremes, fire resistance, prefabricated structures and sustainable construction materials. Dr Li received an ARC Discovery Early Career Researcher Award (DECRA) in 2015. He is also a Chief Investigator in the Australian Research Council (ARC) Industrial Transformation Research Hub (Nanoscience based construction material manufacturing) from 2016. Currently, Dr Li has been the reviewers for a number of international Journals in the areas of concrete materials and structures. Up to now, he has published more than 20 referred international journal papers with Google Scholar H index 9 and citations 396.