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Dielectric relaxation spectroscopy to investigate structured water in mortar

Asano, M. / Miura, N. / Sudo, S. / Hayashi, Y. / Shinyashiki, N. / Yagihara, S. / Shiotsubo, M. / Kato, Y. / Uomoto, T. / Arino, M. / ... [more]

Dielectric relaxation phenomena were observed for structured water concerned with calcium silicate hydrate (C-S-H) gel in mortar by broadband dielectric spectroscopy (BDS), in order to investigate the dependences on humidity and carbonation. Two relaxation processesdue to structured water were assigned from dielectric relaxation curves obtained in the frequency range between 1 mHz and 1 MHz. The relaxation time of each process increases with decreasing amount of water in mortar. The frequency of the absorption peak for carbonated mortar is lower than that for non-carbonated mortar. Dielectric relaxation phenomena obtained for concrete samples cored from sidewall of expressway with the curing time of 40 years indicate the three relaxation processes as well as the mortar test pieces.

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Dielectric relaxation spectroscopy to investigate structured water in mortar

Asano, M. / Miura, N. / Sudo, S. / Hayashi, Y. / Shinyashiki, N. / Yagihara, S. / Shiotsubo, M. / Kato, Y. / Uomoto, T. / Arino, M. / ... [more]

Dielectric relaxation phenomena were observed for structured water concerned with calcium silicate hydrate (C-S-H) gel in mortar by broadband dielectric spectroscopy (BDS), in order to investigate the dependences on humidity and carbonation. Two relaxation processesdue to structured water were assigned from dielectric relaxation curves obtained in the frequency range between 1 mHz and 1 MHz. The relaxation time of each process increases with decreasing amount of water in mortar. The frequency of the absorption peak for carbonated mortar is lower than that for non-carbonated mortar. Dielectric relaxation phenomena obtained for concrete samples cored from sidewall of expressway with the curing time of 40 years indicate the three relaxation processes as well as the mortar test pieces.

Dielectric relaxation spectroscopy to investigate structured water in mortar

Asano, M. / Miura, N. / Sudo, S. / Hayashi, Y. / Shinyashiki, N. / Yagihara, S. / Shiotsubo, M. / Kato, Y. / Uomoto, T. / Arino, M. / ... [more]

Dielectric relaxation phenomena were observed for structured water concerned with calcium silicate hydrate (C-S-H) gel in mortar by broadband dielectric spectroscopy (BDS), in order to investigate the dependences on humidity and carbonation. Two relaxation processesdue to structured water were assigned from dielectric relaxation curves obtained in the frequency range between 1 mHz and 1 MHz. The relaxation time of each process increases with decreasing amount of water in mortar. The frequency of the absorption peak for carbonated mortar is lower than that for non-carbonated mortar. Dielectric relaxation phenomena obtained for concrete samples cored from sidewall of expressway with the curing time of 40 years indicate the three relaxation processes as well as the mortar test pieces.

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Title:

Dielectric relaxation spectroscopy to investigate structured water in mortar

Additional title:

Dielektrische Relaxationsspetroskopie zur Untersuchung der Wasseranordnung in Mörtel

Contributors:

Asano, M. (author) / Miura, N. (author) / Sudo, S. (author) / Hayashi, Y. (author) / Shinyashiki, N. (author) / Yagihara, S. (author) / Shiotsubo, M. (author) / Kato, Y. (author) / Uomoto, T. (author) / Arino, M. (author)

Published in:

Internationales Symposium, NDT-CE, Nondestructive Testing in Civil Engineering, 2003 ; 1-6

DGZfP-Berichtsband ; BB 85-CD

Publication date:

2003

Size:

6 Seiten, 6 Bilder, 1 Tabelle, 16 Quellen

Remarks:

(Nicht paginiert)

ISBN:

Type of media:

Conference paper

Type of material:

Storage medium

Language:

English

Keywords:

zerstörungsfreie Prüfung , Relaxation , elektrische Prüfung , Dielektrizitätseigenschaft , Mörtel , strukturelle Relaxation , Wasser , Breitbandsignal

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