Program: Collaborative Research with Industry (CRI)
Field: Civil Engineering
Principal Investigator: Dr. Ganchai Tanapornraweekit
Sending University: Thammasat University (TU)
Japanese Co-Investigator: Assoc. Prof. Dr. Kohei NAGAI
Japanese University: The University of Tokyo
This research project aims to develop a new type of fiber reinforced concrete in order to use in structures exposed to marine environment where the steel corrosion in concrete mainly deteriorates the service life of structures. Aramid fibers which are non-corroded material are mixed with fresh concrete to enhance mechanical properties of hardened concrete. This type of composite material is called as aramid fiber reinforced concrete (AFRC). The delay of steel corrosion results from the lower level of chloride penetration through very smaller concrete cracks compared to those of normal concrete.This is the result from crack bridging mechanism contributed by aramid fibers. The presence of aramid fibers in concrete matrix may also act as a barrier in a chloride penetration process. The effects from fiber length and shape of the fibers, i.e. plain straight or twisted, will be investigated in this study. This research will show the effects of aramid fibers in terms of load-displacement relationship, crack width and number of cracks of AFRC beams with and without marine environment exposure . This research strengthen the network between SIIT, Thammasat University and Chulalongkorn University (CU) as some part of experiments were also conducted at CU. One national conference paper were written by both SIIT and CU faculties. Also we aim for another journal published in the near future. Apart from the experiment at SIIT and TU, we also have a plan to separate some experimental works to be performed in Burapha University (BU). For the overseas network, the relationship between the SIIT research team and the research teams at University of Tokyo was established. Assoc. Prof. Kohei Nagai is the coinvestigator of this research project. Also one article from this research was published and presented at The 7th International Conference of Asian Concrete Federation (ACF 2016) in Hanoi, Vietnam. The international academic network has been also strengthened during this conference. Students have more necessary testing equipment used for the experimental work. More varieties of experiment can be performed. The main benefit will go to construction industry as this research will explore the new type of concrete for marine exposed structures. The service life of these structures will be prolonged. Less maintenance cost will be required for this type of concrete structure.