Abstract
A water-based colloid of submicron graphite particles is an effective admixture for enhancing the EMI shielding effectiveness of cement paste, though it is ineffective for lowering the electrical resistivity. As an admixture, it is more effective for shielding than 15-μm-diameter discontinuous carbon fibers, though it is less effective than 0.1-μm-diameter discontinuous carbon filaments. A shielding effectiveness of 22 dB at 1 GHz is reached by cement paste at a solid graphite content of 0.92 vol.%, compared to a value of 11 dB for a coating made from the graphite colloid and a value of 14 dB for graphite-colloid-coated cement paste (without admixture).
| Original language | English |
|---|---|
| Pages (from-to) | 1737-1740 |
| Number of pages | 4 |
| Journal | Cement and Concrete Research |
| Volume | 33 |
| Issue number | 11 |
| DOIs | |
| State | Published - Nov 2003 |
Keywords
- Admixture
- Cement paste
- Electrical properties
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