Abstract
The relative dielectric constant of cement paste at 10 kHz-1 MHz is decreased by silica fume addition (from 29 to 21 at 10 kHz) and by steel fiber addition (from 29 to 20 at 10 kHz), due to the volume occupied by these admixtures in place of cement. It is increased by latex addition (from 29 to 35 at 10 kHz) and by carbon fiber addition (from 21 to 54 for silica fume cement at 10 kHz) due to the interface between cement and these admixtures. Increasing the carbon fiber content beyond the percolation threshold decreases the relative dielectric constant (from 54 to 49 at 10 kHz).
| Original language | English |
|---|---|
| Pages (from-to) | 673-677 |
| Number of pages | 5 |
| Journal | Cement and Concrete Research |
| Volume | 31 |
| Issue number | 4 |
| DOIs | |
| State | Published - Apr 2001 |
Keywords
- Admixture
- Dielectric
- Electrical properties
- Fiber reinforcement
- Silica fume
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