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http://dx.doi.org/10.14190/JRCR.2021.9.3.295

Surface Modification of Recycled Plastic Film-Based Aggregates for Use in Concrete  

Kim, Tae Hun (Center for C1 Gas & Carbon Convergent Research, Korea Research Institute of Chemical Technology (KRICT))
Lee, Jea Uk (Department of Advanced Materials Engineering for Information and Electronics, Kyung Hee University)
Hong, Jin-Yong (Center for C1 Gas & Carbon Convergent Research, Korea Research Institute of Chemical Technology (KRICT))
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.9, no.3, 2021 , pp. 295-302 More about this Journal
Abstract
Surface modification of recycled plastic film-based aggregates is demonstrated to enhance the interaction between aggregates and cement paste. It is shown that the oxygen(O2) atmospheric pressure plasma(APP) treatment leads to a drastic increase in hydrophilicity. In case of the plasma treatment at 100W of RF power, 15/4sccm of O2/Ar flow rate and 30sec of discharging time, the water contact angle on the aggregates surface decreased from 104.5° to 44.0°. In addition, the contact angle of surface modified aggregates kept in air increased with time elapse. Improvement of hydrophilicity can be explained by the formation of new hydrophilic oxygen functional groups which is identified as C-OH, C-O-C, C=O, -COOH by X-ray photoelectron spectroscopy(XPS) analysis and Fourier-transform infrared spectroscopy(FT-IR). Therefore, it can be concluded that the plasma treatment process is an effective method to improve adhesion of the recycled plastic film-based aggregates and cement paste.
Keywords
Plastic waste; Recycling; Concrete aggregates; Atmospheric pressure plasma; Surface modification;
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