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Interfacial Pullout Characteristics of Recycled PET Fiber With Hydrophilic Chemical Treatments in Cement Based Composites
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 Title & Authors
Interfacial Pullout Characteristics of Recycled PET Fiber With Hydrophilic Chemical Treatments in Cement Based Composites
Won, Jong-Pil; Park, Chan-Gi; Kim, Yoon-Jeong; Park, Kyung-Hoon;
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The purpose of this study was to enhance bond performance between recycled PET (polyethylene telephthalat) fiber and cement composites through hydrophilic treatment using maleic anhydride grafted polypropylene(mPP). The mPP with various concentration of 0%, 5%, 10%, 15% and 20% to determine effect on bond behavior of recycled PET fiber were applied as experimental variables. Dog bone shaped specimens according to JCI SF-8 was applied to evaluate the bond strength and pullout energy. The results showed increased bond strength and pullout energy as concentration of mPP. Concentration of 15% mPP showed the most effective results while 20% showed reduced performance results. Because 15% mPP ensures perfect coating while 20% makes thick coating area that resulted in crack propagation and consequent separation of PET fiber and coated area during pullout load occurred. Enhancement mechanism of bond performance of recycled PET fiber and cement composites with each concentration of mPP could be conformed through investigation of microstructure of fiber surface.
bond behavior;cement based composites;maleic anhydride grafted polypropylene(mPP);pullout energy;
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