Abstract
A recent progress on the application of impedance spectroscopy (IS) to the study of microstructure and transport in cement-based materials has been reported. With the IS spectrum, bulk resistance could be determined. The high values of the relative dielectric constant result of the microstructure inducing dielectric amplification. The role of large capillary pores in the dielectric amplification in young pastes are confirmed by solvent exchange experiments coupled with digital-image-based computer modeling. When the conductivities (εr) and relative dielectric constants (εr) of ordinary portland cement (OPC) pastes were monitored during cooling and solvent exchange with isopropanol and methanol, dramatic decreases in and as well as a secondary dielectric amplification were observed. By comparing the dielectric behavior of methanol-exchanged OPC pastes to isopropanol-exchanged OPC pastes, additional insight into the variable nature of the C-S-H microstructure was achieved.
| Original language | English |
|---|---|
| Title of host publication | Materials Research Society Symposium - Proceedings |
| Publisher | Materials Research Society |
| Pages | 255-264 |
| Number of pages | 10 |
| Volume | 370 |
| Publication status | Published - 1995 |
| Event | Proceedings of the 1994 MRS Fall Meeting - Boston, MA, USA Duration: Nov 28 1994 → Nov 30 1994 |
Other
| Other | Proceedings of the 1994 MRS Fall Meeting |
|---|---|
| City | Boston, MA, USA |
| Period | 11/28/94 → 11/30/94 |
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ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
Cite this
Microstructure-electrical property relationships in cement-based materials. / Olson, R. A.; Moss, G. M.; Christensen, B. J.; Shane, J. D.; Coverdale, R. T.; Garboczi, E. J.; Jennings, H. M.; Mason, Thomas O.
Materials Research Society Symposium - Proceedings. Vol. 370 Materials Research Society, 1995. p. 255-264.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Microstructure-electrical property relationships in cement-based materials
AU - Olson, R. A.
AU - Moss, G. M.
AU - Christensen, B. J.
AU - Shane, J. D.
AU - Coverdale, R. T.
AU - Garboczi, E. J.
AU - Jennings, H. M.
AU - Mason, Thomas O
PY - 1995
Y1 - 1995
N2 - A recent progress on the application of impedance spectroscopy (IS) to the study of microstructure and transport in cement-based materials has been reported. With the IS spectrum, bulk resistance could be determined. The high values of the relative dielectric constant result of the microstructure inducing dielectric amplification. The role of large capillary pores in the dielectric amplification in young pastes are confirmed by solvent exchange experiments coupled with digital-image-based computer modeling. When the conductivities (εr) and relative dielectric constants (εr) of ordinary portland cement (OPC) pastes were monitored during cooling and solvent exchange with isopropanol and methanol, dramatic decreases in and as well as a secondary dielectric amplification were observed. By comparing the dielectric behavior of methanol-exchanged OPC pastes to isopropanol-exchanged OPC pastes, additional insight into the variable nature of the C-S-H microstructure was achieved.
AB - A recent progress on the application of impedance spectroscopy (IS) to the study of microstructure and transport in cement-based materials has been reported. With the IS spectrum, bulk resistance could be determined. The high values of the relative dielectric constant result of the microstructure inducing dielectric amplification. The role of large capillary pores in the dielectric amplification in young pastes are confirmed by solvent exchange experiments coupled with digital-image-based computer modeling. When the conductivities (εr) and relative dielectric constants (εr) of ordinary portland cement (OPC) pastes were monitored during cooling and solvent exchange with isopropanol and methanol, dramatic decreases in and as well as a secondary dielectric amplification were observed. By comparing the dielectric behavior of methanol-exchanged OPC pastes to isopropanol-exchanged OPC pastes, additional insight into the variable nature of the C-S-H microstructure was achieved.
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M3 - Conference contribution
VL - 370
SP - 255
EP - 264
BT - Materials Research Society Symposium - Proceedings
PB - Materials Research Society
ER -