Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7883436 | Cement and Concrete Composites | 2018 | 6 Pages |
Abstract
The idea of preparing electromagnetic wave absorption cement-based composite using nano-Fe3O4 magnetic fluid as electromagnetic wave absorber is proposed. Nano-Fe3O4 magnetic fluid with obvious superparamagnetism is synthesized based on the co-precipitation method. When 5% nano-Fe3O4 magnetic fluid is added into cement, the composite prepared shows excellent electromagnetic wave absorption properties, e.g. the absorption bandwidth with reflection loss lower than â10â¯dB and lower than â15â¯dB is about 9.5â¯GHz and 6.3â¯GHz respectively, much better than that of the composite prepared with nano-Fe3O4 powder and bulk Fe3O4 powder. As well, nano-Fe3O4 magnetic fluid accelerates the early hydration of cement and improves its early age compressive strength obviously. Due to the advantages of easy processing, cheap cost, non-toxic and high electromagnetic wave absorption, cement-based composite prepared with nano-Fe3O4 magnetic fluid shows the huge potential application in construction of electromagnetic wave interference shielding buildings.
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Authors
Yongjia He, Linnu Lu, Keke Sun, Fazhou Wang, Shuguang Hu,