Quantification of plastic shrinkage cracking in mortars using digital image correlation

I.M.G. Bertelsen, C. Kragh, G. Cardinaud, L.M. Ottosen, G. Fischer

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Abstract

This study presents a digital image correlation (DIC) technique for the detection and quantification of plastic shrinkage cracking in thin restrained mortar overlays applied on concrete substrates. The non-contact 2D-DIC technique enables measurements of in-plane surface strain and displacement under continuous monitoring. A post-processing procedure to compute various crack parameters, such as crack location, width, length and area on the specimen surface is presented, which enables the crack patterns to be synthesized and digitally reproduced from DIC data. The formation of surface cracking is illustrated in histograms facilitating a quantitative analysis. The crack width measurements obtained by DIC data were verified using an optical microscope. The temperature evolution, evaporation rate and free shrinkage behaviour of unrestrained mortar specimens were also tested to increase the knowledge of the early-age behaviour. This method is intended for evaluation of various shrinkage mitigation strategies in cement-based mortars and other repair mortars.
Original languageEnglish
Article number105761
JournalCement and Concrete Research
Volume123
Number of pages13
ISSN0008-8846
DOIs
Publication statusPublished - 2019

Keywords

  • Plastic shrinkage
  • Image analysis
  • Crack detection
  • Cement-based materials
  • Digital image correlation

Cite this

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title = "Quantification of plastic shrinkage cracking in mortars using digital image correlation",
abstract = "This study presents a digital image correlation (DIC) technique for the detection and quantification of plastic shrinkage cracking in thin restrained mortar overlays applied on concrete substrates. The non-contact 2D-DIC technique enables measurements of in-plane surface strain and displacement under continuous monitoring. A post-processing procedure to compute various crack parameters, such as crack location, width, length and area on the specimen surface is presented, which enables the crack patterns to be synthesized and digitally reproduced from DIC data. The formation of surface cracking is illustrated in histograms facilitating a quantitative analysis. The crack width measurements obtained by DIC data were verified using an optical microscope. The temperature evolution, evaporation rate and free shrinkage behaviour of unrestrained mortar specimens were also tested to increase the knowledge of the early-age behaviour. This method is intended for evaluation of various shrinkage mitigation strategies in cement-based mortars and other repair mortars.",
keywords = "Plastic shrinkage, Image analysis, Crack detection, Cement-based materials, Digital image correlation",
author = "I.M.G. Bertelsen and C. Kragh and G. Cardinaud and L.M. Ottosen and G. Fischer",
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doi = "10.1016/j.cemconres.2019.05.006",
language = "English",
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journal = "Cement and Concrete Research",
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publisher = "Pergamon Press",

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Quantification of plastic shrinkage cracking in mortars using digital image correlation. / Bertelsen, I.M.G.; Kragh, C.; Cardinaud, G.; Ottosen, L.M.; Fischer, G.

In: Cement and Concrete Research, Vol. 123, 105761, 2019.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Quantification of plastic shrinkage cracking in mortars using digital image correlation

AU - Bertelsen, I.M.G.

AU - Kragh, C.

AU - Cardinaud, G.

AU - Ottosen, L.M.

AU - Fischer, G.

PY - 2019

Y1 - 2019

N2 - This study presents a digital image correlation (DIC) technique for the detection and quantification of plastic shrinkage cracking in thin restrained mortar overlays applied on concrete substrates. The non-contact 2D-DIC technique enables measurements of in-plane surface strain and displacement under continuous monitoring. A post-processing procedure to compute various crack parameters, such as crack location, width, length and area on the specimen surface is presented, which enables the crack patterns to be synthesized and digitally reproduced from DIC data. The formation of surface cracking is illustrated in histograms facilitating a quantitative analysis. The crack width measurements obtained by DIC data were verified using an optical microscope. The temperature evolution, evaporation rate and free shrinkage behaviour of unrestrained mortar specimens were also tested to increase the knowledge of the early-age behaviour. This method is intended for evaluation of various shrinkage mitigation strategies in cement-based mortars and other repair mortars.

AB - This study presents a digital image correlation (DIC) technique for the detection and quantification of plastic shrinkage cracking in thin restrained mortar overlays applied on concrete substrates. The non-contact 2D-DIC technique enables measurements of in-plane surface strain and displacement under continuous monitoring. A post-processing procedure to compute various crack parameters, such as crack location, width, length and area on the specimen surface is presented, which enables the crack patterns to be synthesized and digitally reproduced from DIC data. The formation of surface cracking is illustrated in histograms facilitating a quantitative analysis. The crack width measurements obtained by DIC data were verified using an optical microscope. The temperature evolution, evaporation rate and free shrinkage behaviour of unrestrained mortar specimens were also tested to increase the knowledge of the early-age behaviour. This method is intended for evaluation of various shrinkage mitigation strategies in cement-based mortars and other repair mortars.

KW - Plastic shrinkage

KW - Image analysis

KW - Crack detection

KW - Cement-based materials

KW - Digital image correlation

U2 - 10.1016/j.cemconres.2019.05.006

DO - 10.1016/j.cemconres.2019.05.006

M3 - Journal article

VL - 123

JO - Cement and Concrete Research

JF - Cement and Concrete Research

SN - 0008-8846

M1 - 105761

ER -