Effect of admixtures on the dielectric constant of cement paste

Authors
Wen, SH Chung, DDL
Citation
Sh. Wen et Ddl. Chung, Effect of admixtures on the dielectric constant of cement paste, CEM CONCR R, 31(4), 2001, pp. 673-677
Citations number
28
Categorie Soggetti
Material Science & Engineering
Journal title
CEMENT AND CONCRETE RESEARCH
ISSN journal
00088846 → ACNP
Volume
31
Issue
4
Year of publication
2001
Pages
673 - 677
Database
ISI
SICI code
0008-8846(200104)31:4<673:EOAOTD>2.0.ZU;2-R
Abstract
The relative dielectric constant of cement paste at 10 kHz-1 MHz is decreas ed by silica fume addition (from 29 to 21 at 10 kHz) and by steel fiber add ition (from 29 to 20 at 10 kHz), due to the volume occupied by these admixt ures in place of cement. It is increased by latex addition (from 29 to 35 a t IO kHz) and by carbon fiber addition (from 21 to 54 for silica fume cemen t at 10 kHz) due to the interface between cement and these admixtures. Incr easing the carbon fiber content beyond the percolation threshold decreases the relative dielectric constant (from 54 to 49 at 10 kHz). (C) 2001 Elsevi er Science Ltd. Ail rights reserved.