Effect of Partial Oxidation Rubber on Hydrophilicity of Cement Composites

Abstract:

The purpose of this study was to observe the effect of partially oxidized rubber powder on cement hydration. The experiment first pulverized the rubber and then put it into a reactor with a low oxygen concentration for partial oxidation. The surface functional groups of the rubber particles before and after the reaction were observed by Fourier Transform Infrared Spectroscopy (FT-IR). The area integral ratio of S-O to C-H3 in the FT-IR spectrum was used as the indicator of partial oxidation results. Finally, the rubber particle after the reaction was added to cement to prepare a cement paste, and its effect on the hydration reaction of the cement was observed by FT-IR, scanning electronic microscope (SEM), optical microscope (OM). SEM images also showed that such sample had very dense C-S-H structure. It confirmed that this composite had the hydrophobic property by observing the contact angle of water droplets on this composite surface.

• Periodical: Key Engineering Materials (Volume 846)
• Pages: 202-206
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.846.202
• Online since: June 2020
• Authors: Chi Yao Chen, Tzu Hou Wang, Maw Tien Lee*
• Keywords: Cement Paste, Crumb Rubber, Hydration, Partial Oxidation

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