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01-02-2007 | Issue 1/2007

Journal of Materials Engineering and Performance 1/2007

Expanded Polystyrene as an Admixture in Cement-Based Composites for Electromagnetic Absorbing

Journal:
Journal of Materials Engineering and Performance > Issue 1/2007
Authors:
Hongtao Guan, Shunhua Liu, Yuping Duan

Abstract

The electromagnetic characteristics of expanded polystyrene (EPS) filling cement-based composites were studied using arched reflecting method. The findings show that EPS filling ratio and EPS grain size as well as the sample thickness are important to absorbing properties of cement-based composites. The least reflectivity in 8∼18 GHz is −15.27 dB and the bandwidth lower than −10 dB is 6.2 GHz, when the EPS filling ratio and thickness of sample are 60 vol.% and 20 mm, respectively, with the EPS diameter of 1 mm. It also indicates that the attenuation of electromagnetic wave can be mainly attributed to the multiple reflection and scattering inside the composite material.

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