掺合镀铜织物纤维电磁屏蔽砂浆性能研究  

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

作　　者：张宏博[1,2] 解全一 岳红亚 孟庆宇[1,2] 

机构地区：[1]山东大学土建与水利学院,山东济南250061 [2]山东省路基安全工程技术研究中心,山东济南250061

出　　处：《山东大学学报（工学版）》2016年第1期56-61,共6页Journal of Shandong University（Engineering Science）

基　　金：国家自然科学基金资助项目(51208284)

摘　　要：为了研究纤维掺量、长度等因素对掺合镀铜织物纤维电磁屏蔽砂浆力学性能、导电性能、电磁屏蔽效能（shielding effectiveness,SE）的影响规律,设计了强度试验、电阻率试验和屏蔽效能试验研究了各因素对金属纤维砂浆性能的影响规律。研究结果表明：金属纤维能够增强砂浆的力学性能和导电性能,纤维砂浆抗折强度比普通砂浆增加14.2%～17.8%,抗压强度增加7.3%～23.1%,电阻率仅为普通砂浆的3.5%。掺加金属纤维后能够提高砂浆中高频电磁屏蔽效能,厚度为2 cm的金属纤维砂浆的体积分数为1%时SE值最高;SE值随着纤维长度的增加逐渐增大,长度为20 mm的金属纤维砂浆在0～700 MHz和2 000～3 000 MHz波频范围SE值较普通砂浆增加约10 d B;砂浆厚度对屏蔽效能影响明显,厚度为3 cm的纤维砂浆SE值几乎为厚度为2 cm的纤维砂浆的2倍,两种厚度砂浆的SE值均超过20 d B,最大值为50 d B。结论可为电磁屏蔽砂浆在民用建筑中的推广和应用提供借鉴。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 lawof 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 d B 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 d B,and the maximum was 50 d B.Conclusion of this study could provide reference for electromagnetic shielding mortar＇s popularization and application in civil architecture.

关 键 词：金属纤维 电磁屏蔽砂浆 力学性能 导电性能 屏蔽效能 

分 类 号：TQ172[化学工程—水泥工业]