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Frequency Characteristics of Acoustic Emission Signals from Cementitious Wasteforms with Encapsulated Al

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Abstract

Acoustic emission (AE) signals were continuously recorded and their intrinsic frequency characteristics examined in order to evaluate the mechanical performance of cementitious wasteform with encapsulated Al waste. The primary frequency in the power spectrum and its range of intensity for the detected acoustic waves were potentially related with appearance of different micromechanical events caused by Al corrosion within the encapsulating cement system. In addition the process of cement matrix hardening has been shown as a source of AE signals characterised with essentially higher primary frequency (above 2 MHz) compared with those due to Al corrosion development (below 40 kHz) and cement cracking (above 100 kHz).

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Authors and Affiliations

  1. Immobilisation Science Laboratory, Department of Engineering Materials, University of Sheffield, Mappin Street, S1 3JD, Sheffield, United Kingdom

    Lyubka M. Spasova & Michael I. Ojovan

Authors
  1. Lyubka M. Spasova
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  2. Michael I. Ojovan
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Spasova, L.M., Ojovan, M.I. Frequency Characteristics of Acoustic Emission Signals from Cementitious Wasteforms with Encapsulated Al. MRS Online Proceedings Library 985, 1003 (2006). https://doi.org/10.1557/PROC-985-0985-NN10-03

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  • DOI: https://doi.org/10.1557/PROC-985-0985-NN10-03

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