Abstract
The previous studies confirmed that Carbon Fiber Reinforced Plastics (CFRP) is well suited for application in concrete structures as internal reinforcement. In precast slabs, using CFRP is a method not only mitigate against the steel corrosion by the salt damage environment, improve the durability and serviceability of the structures but also reduce the structural weight. However, other studies showed that the drawback of the precast slabs is the in situ joints. Focusing on the development of precast slabs reinforced by CFRP, this study considers how to using CFRP in joint positions to enhance the durability and reduce the width as short as possible of the joint. A series of pull-out specimens were carried out as fundamental experiments to consider the increase of the bond between CFRP and concrete in the joints. Specimens have the differences in diameter of CFRP, the fixation length, and method using CFRP in the joint. From achieved experimental results, the method using CFRP with a diameter of 15.2 mm, fixation length of 15Ø, and F-type (filling inside tuft body) has been selected, proposed for further development and research.KeywordsPrecast slabsCFRPPull-out experimentJointFixation length
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