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Effect of Elevated Temperature on the Mechanical Properties of Carbon Nanotubes Reinforced Cementitious Materials

Release time:August 14, 2019

Topic: Effect of Elevated Temperature on the Mechanical Properties of Carbon Nanotubes Reinforced Cementitious Materials

Speaker: Ir Dr. Denvid LAU, City University of Hong Kong

Date: August 19, 11:00 - 12:00 AM

Venue: D225, New Main Building

Abstract:

Carbon nanotube (CNT) is well known for its elegant structure and its remarkable mechanical properties, including strength and stiffness and thermal stability, which have been widely considered for the fields of electronic engineering, biological technology, chemistry and multifunctional composites. Moreover, the CNTs exhibit a much better thermal stability when compared with graphene, which makes it an ideal candidate for the nano-reinforcement to metals, ceramics and polymers. Recently, the application of CNTs has extended to construction industry by combining CNTs with cementitious materials, which is a construction material commonly used due to its low cost and high compressive strength. The objectives of this study are to provide a comprehensive investigation on the mechanical properties of CNTs reinforced cementitious material under different elevated temperatures, and to explore the role of CNTs and its reinforcing mechanism in the composite system under different elevated temperatures. It is envisioned that our results can provide a fundamental knowledge upon how an appropriate nanomaterial can be selected and designed so that cementitious composite materials which possess high temperature resistance can be achieved.

Biography of the Speaker:

Denvid obtained his Bachelor degree with first class honors and Master degree in Civil Engineering from the University of Hong Kong (HKU) in 2004 and 2006 respectively, and got his second Master degree from the Department of Civil and Environmental Engineering (CEE) at Massachusetts Institute of Technology (MIT) in 2009. He then received his Ph.D. in the field of structures and materials from MIT in 2012. Prior to joining the City University of Hong Kong (CityU) as an assistant professor in August 2012, he worked as a postdoctoral associate at MIT. Currently, he is an associate professor with tenure at CityU. His research focuses on the multiscale modeling of organic-inorganic system, moisture-induced debonding, durability of concrete-epoxy system and fiber-reinforced polymer (FRP) composites in structural rehabilitation. To date, Denvid has attracted over HK$10 million fund in total for research and teaching development. He is currently the editorial board member of several international journals. He has published more than 100 referred journal and conference articles and has delivered more than 30 invited talks, which include plenary and keynote speeches in international conferencesaround the world. Denvid has been nominated and selected as a Founding Member of the Young Academy of Sciences of Hong Kong (YASHK), and has received one of The President's Awards from the CityU, in recognition of his remarkable academic achievement. In addition, Denvid has received the Certificate of Merit for the Hong Kong Institution of Engineers (HKIE) Young Engineer Award 2018 in appreciation of his effort and dedication to the engineering profession, and the Commendation Merit Award - R&D Award of Structural Excellence Award 2018, which is presented by the HKIE (Structural Division).



School of Transportation Science and Engineering