Please use this identifier to cite or link to this item: http://hdl.handle.net/11400/8220
Title: Non-destructive evaluation of cement-based materials from pressure-stimulated electrical emission
Alternative title / Subtitle: preliminary results
Authors: Κυριαζόπουλος, Αντώνης
Αναστασιάδης, Κίμων
Τριάντης, Δήμος Α.
Brown, Chris J.
Item type: Journal article
Keywords: NDT;Laboratory testing;Cement--Testing;Pressure-stimulated currents;Micro-cracks;Structural health monitoring;Εργαστηριακές δοκιμές;Δοκιμή τσιμέντου;Μικρορωγμές;Διαρθρωτική παρακολούθηση της υγείας
Subjects: Technology
Engineering
Τεχνολογία
Μηχανική
Issue Date: 4-Apr-2015
Apr-2011
Date of availability: 4-Apr-2015
Publisher: Elsevier
Abstract: This paper introduces the possibility of in situ assessment of loading and remaining strength in concrete structures by means of measuring discharge of electric current from loaded specimens. The paper demonstrates that the techniques have been applied to other rock-like materials, but that for the first time they are applied to cement-based materials and a theoretical model is proposed in relation to the appearance of electrical signals during sample loading and up to fracture. A series of laboratory experiments on cement mortar specimens in simple uniaxial compression, and subsequently in bending – hence displaying both tension and compression – are described and show clear correlations between resulting strains and currents measured. Under uniaxial loading there is a well-defined relationship between the pressure-stimulated current (PSC) as a result of a monotonic mechanical loading regime. Similar results are observed in the three-point bending tests where a range of loading regimes is studied, including stepped changes in loading. While currents can be measured at low strains, best results seem to be obtained when strains approach and exceed yield stress values. This technique clearly has immense potential for structural health monitoring of cement-based structures. Both intermittent and continuous monitoring becomes possible, and given an ongoing campaign of monitoring, remaining strength can be estimated.
Language: English
Citation: KYRIAZOPOULOS, A., ANASTASIADIS, C., TRIANTIS, D.A. & BROWN, C.J. (2011). Non-destructive evaluation of cement-based materials from pressure-stimulated electrical emission: preliminary results. Construction and Building Materials. [Online] 25 (4). p.1980-1990. Available from: http://www.sciencedirect.com [Accessed 17/12/2010]
Journal: Construction and Building Materials
Type of Journal: With a review process (peer review)
Access scheme: Publicly accessible
License: Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ηνωμένες Πολιτείες
URI: http://hdl.handle.net/11400/8220
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