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为了研究异型钢纤维在建筑材料中的电磁防护性能,将波浪型钢纤维以2%、4%的质量比掺入水泥净浆,研究试样在厚度分别为5 mm、15 mm、25 mm和不同养护时间下的吸波性能。结果显示:所有厚度为5 mm试样,在4 GHz1、0 GHz附近都有明显的吸收峰,大于6 dB的吸收峰累计带宽都达到4 GHz;25 mm试样,当长30 mm的波浪型钢纤维掺入4%时,在17 GHz附近最大吸收峰,6 dB带宽近7 GHz,而且不受养护时间影响。异型钢纤维在建筑材料中具有潜在的电磁防护性能。
In order to study the electromagnetic protection performance of profiled steel fibers in building materials, the wave-shaped steel fibers were incorporated into the cement paste at the mass ratio of 2% and 4%, and the specimens were tested at 5 mm, 15 mm, 25 mm and 15 mm Absorbing performance under conservation time. The results show that all samples with a thickness of 5 mm have obvious absorption peaks near 4 GHz1 and 0 GHz, and the cumulative absorption bandwidth of more than 6 dB reaches 4 GHz. For the 25 mm sample, when the wave length is 30 mm With 4% fiber incorporation, the maximum absorption band around 17 GHz and the 6 dB bandwidth of nearly 7 GHz are unaffected by curing time. Shaped steel fibers have potential electromagnetic shielding properties in building materials.