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Evolution of Impedance Spectra during Debonding and Pullout of Single Steel Fibers from Cement
Author(s) -
Torrents Josep M.,
Easley Thomas C.,
Faber K. T.,
Mason Thomas O.,
Shah Surendra P.
Publication year - 2001
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2001.tb00735.x
Subject(s) - materials science , composite material , dielectric spectroscopy , electrical impedance , cement , nyquist plot , deflection (physics) , fiber , optics , chemistry , electrode , physics , electrical engineering , electrochemistry , engineering
Impedance measurements were made during the debonding and pullout of a fully embedded, crack‐bridging single steel fiber from a cement matrix. Nyquist plots gave evidence of two bulk arcs, and the “cusp” between them proved to be sensitive to both debonding and pullout of the embedded fiber. Physical simulations that used a steel wire in tap water were applied to interpret the debonding and pull‐out results. The cusp resistance from impedance spectroscopy provided quantitative information about the extent of pullout and, at least qualitatively, correlated with the debond length before pullout. Impedance measurements on both sides of the matrix crack showed that crack deflection and debonding occurred on both sides symmetrically.