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Monitoring crack movement in polymer-based self-healing concrete through digital image correlation, acoustic emission analysis and SEM in-situ loading

(2017) MATERIALS & DESIGN. 115. p.238-246
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Abstract
A study was performed to assess the fitness of continuous monitoring methods to detect failure due to excessive strain on polymers bridging moving cracks in the context of self-healing concrete. Testing of several polymer precursors with distinct properties also allowed conclusions regarding the requirements for polymers in this application. Acoustic emission (AE) analysis was performed in parallel with digital image correlation (DIC) at the macro-scale. In addition, a micro-scale study was performed with tensile tests inside an SEM chamber. Detection of failure through AE analysis coupled with DIC was possible only in case of failure due to brittle fracture of a rigid foam after 9% strain, which generated high-energy acoustic events. Direct observation of interfaces with SEM insitu loading allowed determination of failure of a rigid foam due to cracking of the polymer matrix and detachment at the interface with the cementitious matrix, with an onset at 5% strain and complete detachment at 16% strain. For a flexible, continuous film of polymer, detachment occurred before 50% strain. Assuming adequate adhesion, polymers with high elongation (>100%) and modulus of elasticity much lower than 10 MPa are required if cracks subjected to a realistic amplitude of movement are targeted. (C) 2016 Elsevier Ltd. All rights reserved.
Keywords
Concrete, Cracks, Interfaces, Polymers, Self-healing, Monitoring

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MLA
Garcia Feiteira, João Luis et al. “Monitoring Crack Movement in Polymer-based Self-healing Concrete Through Digital Image Correlation, Acoustic Emission Analysis and SEM In-situ Loading.” MATERIALS & DESIGN 115 (2017): 238–246. Print.
APA
Garcia Feiteira, J. L., Tsangouri, E., Gruyaert, E., Lors, C., Louis, G., & De Belie, N. (2017). Monitoring crack movement in polymer-based self-healing concrete through digital image correlation, acoustic emission analysis and SEM in-situ loading. MATERIALS & DESIGN, 115, 238–246.
Chicago author-date
Garcia Feiteira, João Luis, E. Tsangouri, Elke Gruyaert, C. Lors, G. Louis, and Nele De Belie. 2017. “Monitoring Crack Movement in Polymer-based Self-healing Concrete Through Digital Image Correlation, Acoustic Emission Analysis and SEM In-situ Loading.” Materials & Design 115: 238–246.
Chicago author-date (all authors)
Garcia Feiteira, João Luis, E. Tsangouri, Elke Gruyaert, C. Lors, G. Louis, and Nele De Belie. 2017. “Monitoring Crack Movement in Polymer-based Self-healing Concrete Through Digital Image Correlation, Acoustic Emission Analysis and SEM In-situ Loading.” Materials & Design 115: 238–246.
Vancouver
1.
Garcia Feiteira JL, Tsangouri E, Gruyaert E, Lors C, Louis G, De Belie N. Monitoring crack movement in polymer-based self-healing concrete through digital image correlation, acoustic emission analysis and SEM in-situ loading. MATERIALS & DESIGN. Oxford: Elsevier Sci Ltd; 2017;115:238–46.
IEEE
[1]
J. L. Garcia Feiteira, E. Tsangouri, E. Gruyaert, C. Lors, G. Louis, and N. De Belie, “Monitoring crack movement in polymer-based self-healing concrete through digital image correlation, acoustic emission analysis and SEM in-situ loading,” MATERIALS & DESIGN, vol. 115, pp. 238–246, 2017.
@article{8557507,
  abstract     = {A study was performed to assess the fitness of continuous monitoring methods to detect failure due to excessive strain on polymers bridging moving cracks in the context of self-healing concrete. Testing of several polymer precursors with distinct properties also allowed conclusions regarding the requirements for polymers in this application. Acoustic emission (AE) analysis was performed in parallel with digital image correlation (DIC) at the macro-scale. In addition, a micro-scale study was performed with tensile tests inside an SEM chamber. Detection of failure through AE analysis coupled with DIC was possible only in case of failure due to brittle fracture of a rigid foam after 9% strain, which generated high-energy acoustic events. Direct observation of interfaces with SEM insitu loading allowed determination of failure of a rigid foam due to cracking of the polymer matrix and detachment at the interface with the cementitious matrix, with an onset at 5% strain and complete detachment at 16% strain. For a flexible, continuous film of polymer, detachment occurred before 50% strain. Assuming adequate adhesion, polymers with high elongation (>100%) and modulus of elasticity much lower than 10 MPa are required if cracks subjected to a realistic amplitude of movement are targeted. (C) 2016 Elsevier Ltd. All rights reserved.},
  author       = {Garcia Feiteira, João Luis and Tsangouri, E. and Gruyaert, Elke and Lors, C. and Louis, G. and De Belie, Nele},
  issn         = {0264-1275},
  journal      = {MATERIALS & DESIGN},
  keywords     = {Concrete,Cracks,Interfaces,Polymers,Self-healing,Monitoring},
  language     = {eng},
  pages        = {238--246},
  publisher    = {Elsevier Sci Ltd},
  title        = {Monitoring crack movement in polymer-based self-healing concrete through digital image correlation, acoustic emission analysis and SEM in-situ loading},
  url          = {http://dx.doi.org/10.1016/j.matdes.2016.11.050},
  volume       = {115},
  year         = {2017},
}

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