KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
권호 표지

Effect of Hydrophilic Treatments of Recycled PET Fiber on the Control of Plastic Shrinkage Cracking of Cement Based Composites

재생 PET섬유의 친수성표면처리에 따른 시멘트 복합재료의 소성수축균열제어 효과

Won, Jong-Pil;Park, Chan-Gi;Kim, Hawang-Hee;Lee, Sang-Woo
원종필;박찬기;김황희;이상우

  • Published : 20070500

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Abstract

This research presented the effect of hydrophilic treatments of recycled PET fiber made from waste PET bottle on the control of plastic shrinkage cracking of cement based composites. Recycled PET fibers are usually known that plastic fibers have low bond performance and poor dispersion in cement based composites. The reason is the fibers have the characteristics of hydrophobic materials. In this study, the surface of recycled PET fiber was hydrophilized with chemical process. General chemical method which ensures effectiveness is a hydrophilization as inducing anhydro group like OH-, COOH- through vinyl alcohol, acrylic acid, maleic anhydride. Especially, maleic anhydride has been used in hydrophilization of synthetic fiber for cement based composites. In this research, the effect of hydrophilic treatments of recycled PET fiber using maleic anhydride grafted polypropylene(mPP) was examined through plastic shrinkage cracking tests. Test results shows that hydrophilic treatments of fiber surface, the resistance of plastic shrinkage cracking could be highly enhanced due to increased dispersion and bond strength within cement based composites. Also, the results of this study suggests the most effective performance on plastic shrinkage cracking control under condition of embossed type fiber with hydrophilic treatments and 1.00% fiber volume fraction.

Keywords

References

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