| Title |
Pull-out Response and Surface Treatment of Carbon Fiber with Fluorination |
| Authors |
Yun Hyun-Do ; Jeon Esther ; Park Wan-Shin ; Han Byung-Chan ; Yang Il-Seung ; LeeYoung-Seak |
| Keywords |
Pull-out ; Surface Treatment ; Fluorination ; Fiber Reinforcement ; Carbon fiber ; Bond Strength |
| Abstract |
This paper was performed to understand the pull-out behavior of carbon fibers from a cementitious matrix. The effect of embedded length on the pull-out characteristics, the development of the interfacial bond with water-cement ratio of matrix, on the interfacial bond between the fibers and cementitious matrix were studied. The aim of these experiments was to understand the properties of fiber/matrix interface, which are of primary significance on predicting the overall behavior of fiber-reinforced cement-based composites. Carbon fibers have a weak bond with cementitious matrix because of smooth surface of fibers, which does not allow for sufficient friction to develop between the two. In this study a new method to improve the frictional bond by means of surface treatment of fibers was also proposed. The bonding performance was characterized by means of pull-out tests of the untreatd and treated fibers from a cementitious matrix. An optimum level of fiber treatment(fluorination) for maximization of bond efficiency was determined experimentally. |