JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2016, Vol. 46 ›› Issue (1): 56-61.doi: 10.6040/j.issn.1672-3961.0.2014.313

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Study on performance of electromagnetic shielding mortar mixed with copper coated fabric fiber

ZHANG Hongbo1,2, XIE Quanyi1,2, YUE Hongya1,2*, MENG Qingyu1,2   

  1. 1. School of Civil Engineering, Shandong university, Jinan 250061, Shandong, China;
    2. Shandong Engineering &
    Technology Research Center for Subgrade Safety, Jinan 250061, Shandong, China
  • Received:2014-11-05 Online:2016-02-20 Published:2014-11-05

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Abstract: In order to study the influence of fiber dosage, length and other factors on the electromagnetic shielding mortar mixed with copper coated fabric fibers mechanical properties, conductivity and SE(shielding effectiveness), strength test, resistivity test and SE test were put forth. The influence law of the variable factors to the properties of mortar with metal fiber was found. Results showed that the metal fiber could enhance the mechanical properties and electrical conductivity of mortar. The flexural strength of fiber mortar increased about 14.2% to 17.8% than ordinary mortar the compressive strength increased about 7.3%~23.1% and the electrical resistance was only 3.5% of the ordinary mortar. The high frequency electromagnetic shielding effectiveness of the mortar could be improved when adding metal fiber, shielding effect was best when the volume fraction of 2 cm thickness of mortar with metal fiber was 1%. SE was gradually increasing with the increase of fiber length, and SE of 20 mm length mortar metal fiber increased about 10 dB in 0~700 MHz and 2 000~3 000 MHz wave frequency range than ordinary mortar. Mortar thickness had an significant influence on SE, the shielding effect of 3 cm thickness mortar with metal fiber was almost 2 times of the 2 cm thickness mortar with metal fiber mortar, both of which the SE were more than 20 dB, and the maximum was 50 dB. Conclusion of this study could provide reference for electromagnetic shielding mortars popularization and application in civil architecture.

Key words: metal fiber, mechanical properties, shielding effectiveness, electromagnetic shielding mortar, conductivity

CLC Number: 

  • TQ172
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