Knowledge Transfer Office

Innovation to Realization Funding Scheme (I2RF)
- Successful Applications closed on 23 September 2012

Innovation to Realization Funding Scheme (I2RF) - Project Title Project Period Project Duration
1 Rehabilitation of Concrete Structures with Nano-treated Steel Sheet 1/1/2013 - 31/12/2013 12 months
2 Prototype Development of an Innovative Portable Air Sampler for Multiple PM2.5 and Bioaerosol Applications 1/1/2013 - 31/12/2013 12 months
Enquiry Information:
Mr Tomson Lee, Senior Knowledge Transfer Officer
Address: Knowledge Transfer Office, City University of Hong Kong
Room 2220, 2/F, Cheng Yick-chi Building, Tat Chee Avenue
Kowloon, Hong Kong
Tel: (852) 3442 6441/3442 6821
Fax: (852) 3442 0883
Email: thmlee@cityu.edu.hk


Project Abstract


Project Title: Rehabilitation of Concrete Structures with Nano-treated Steel Sheet

Abstract

The externally bonded (EB) fiber-reinforced polymer (FRP) is currently one of the most popular methods for rehabilitation (strengthening/repairing/retrofitting) of concrete structures. However, FRP materials are often questioned, particularly in recent years, by engineers and building authorities for being brittle, temperature sensitive (and emission of toxic gas under fire), and difficult in bonding to concrete. Recently, the PI found out that some nanomaterials, such as nano-treated steel sheet, possess the advantages of FRP while avoiding FRP's critical weaknesses, and are therefore ideal for structural rehabilitation. Major advances in structural engineering usually follow advancement in material science. The use of such advanced materials would certainly cause a major impact in civil/structural engineering. A pilot experimental testing by the PI that involved small-scale beams has demonstrated the high effectiveness and efficiency of the nano-treated steel sheet for rehabilitation of concrete beams. From the pilot study, a new structural scheme - strain localization bonding system (SLBS) - was developed for effective use of such high strength and high ductility nano-treated steel sheet. As a result, two US patents have been filed for the SLBS. This proposed work will act as a proof-of-concept project to build up solid data for demonstration of its superior and unique advantages in both structural efficacy and cost effectiveness to pave its way for widespread applications in the future. Both large scale experimental testing and theoretical modeling will be adopted to obtain the data. Prototype beams will also be built for demonstration to the industry. It is expected that through this proposed project the new structural rehabilitation scheme be disseminated, accepted, and extensively applied in the future in the construction industry.

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Project Title: Prototype Development of an Innovative Portable Air Sampler for Multiple PM2.5 and Bioaerosol Applications

Abstract

Exposure to air pollution may cause a wide range of human respiratory and other health disorders. Two most important metrics of the inhalable air pollutants are PM2.5, due to their ability to carry toxics to human respiratory system, and bioaerosols, due to their potential pathogenic airborne transmission. Reliable methods for fast and efficient characterization of the airborne pollutants are necessary to alleviate their health concerns. However, traditional methods and products have their inherent limitations to achieve the goal. With more stringent air quality standards being implemented in different countries, there will be greater needs and markets for new generation of PM and bioaerosol technologies that can overcome the barriers.

The objective of the project is to develop a portable PM and bioaerosol sampling system with innovative designs for much enhanced collectioubmicron bioaerosols, high preservation of biological viability and post-processing free for direct PM analysis. The future application of the system will enable the quantification of airborne viruses and bacteria in high time resolution to allow fast public response and reduce or eliminate the spread of serious diseases by airborne transmission such as SARS, H5N1 and other pathogens. The system will also be a highly competitive PM sampling product featured with low operational cost and treatment free collection method.

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