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Durable concrete structures with cracks which heal themselves

Kim Van Tittelboom UGent, Manuel Dierick UGent and Nele De Belie UGent (2012) Tenth International Symposium on Brittle Matrix Composites, Proceedings. p.285-294
abstract
Concrete is one of the most widely used construction materials due to its excellent mechanical properties and relatively low cost. However, concrete is prone to crack formation. These cracks do not impair the structural integrity, but they endanger the durability of the structure as aggressive liquids and gasses may enter via these cracks and cause degradation. Therefore, crack repair is needed but these repair works increase the cost of concrete structures by 50% as they are labour intensive and because the structure becomes in discuse during repair. Accordingly, in this research it was investigated whether cementitious materials can be modified so that cracks heal themselves. Therefore, healing agents were encapsulated by brittle capsules and embedded inside the cementitious matrix in the zones where cracks were expected. When the matrix starts cracking, the capsules break and release their content, leading to crack repair. Water absorption measurements were performed to evaluate the healing efficiency. The amount of absobed water was determined by gravimetrical measurements and visualized by X-ray radiography. When samples with untreated cracks were placed with their cracked surface in a water reservoir, it was noticed from the radiographs that water penetrated very fast into the cracks. For samples with self-healing properties no water entered into the cracks. Moreover, even in the zone alongside the crack no water entry was noticed. Therefore, it can be concluded that self-healing of concrete cracks can be used to prevent the ingress of liquids and to prevent subsequent damage to the matrix.
Please use this url to cite or link to this publication:
author
organization
year
type
conference
publication status
published
subject
keyword
healing agent, capsule, autonomous repair, durability, Cementitious material, crack
in
Tenth International Symposium on Brittle Matrix Composites, Proceedings
editor
AM Brandt, J Olek, MA Glinicki and CKY Leung
pages
285 - 294
publisher
Woodhead Publishing
place of publication
Cambridge, UK
conference name
Tenth International Symposium on Brittle Matrix Composites (BMC-10 - 2012)
conference location
Warsaw, Poland
conference start
2012-10-15
conference end
2012-10-17
ISBN
9788389687753
language
English
UGent publication?
yes
classification
C1
copyright statement
I have transferred the copyright for this publication to the publisher
id
3033429
handle
http://hdl.handle.net/1854/LU-3033429
date created
2012-10-23 15:20:25
date last changed
2012-10-25 10:21:12
@inproceedings{3033429,
  abstract     = {Concrete is one of the most widely used construction materials due to its excellent mechanical properties and relatively low cost. However, concrete is prone to crack formation. These cracks do not impair the structural integrity, but they endanger the durability of the structure as aggressive liquids and gasses may enter via these cracks and cause degradation. Therefore, crack repair is needed but these repair works increase the cost of concrete structures by 50\% as they are labour intensive and because the structure becomes in discuse during repair. Accordingly, in this research it was investigated whether cementitious materials can be modified so that cracks heal themselves. Therefore, healing agents were encapsulated by brittle capsules and embedded inside the cementitious matrix in the zones where cracks were expected. When the matrix starts cracking, the capsules break and release their content, leading to crack repair. Water absorption measurements were performed to evaluate the healing efficiency. The amount of absobed water was determined by gravimetrical measurements and visualized by X-ray radiography. When samples with untreated cracks were placed with their cracked surface in a water reservoir, it was noticed from the radiographs that water penetrated very fast into the cracks. For samples with self-healing properties no water entered into the cracks. Moreover, even in the zone alongside the crack no water entry was noticed. Therefore, it can be concluded that self-healing of concrete cracks can be used to prevent the ingress of liquids and to prevent subsequent damage to the matrix.},
  author       = {Van Tittelboom, Kim and Dierick, Manuel and De Belie, Nele},
  booktitle    = {Tenth International Symposium on Brittle Matrix Composites, Proceedings},
  editor       = {Brandt, AM and Olek, J and Glinicki, MA and Leung, CKY},
  isbn         = {9788389687753},
  keyword      = {healing agent,capsule,autonomous repair,durability,Cementitious material,crack},
  language     = {eng},
  location     = {Warsaw, Poland},
  pages        = {285--294},
  publisher    = {Woodhead Publishing},
  title        = {Durable concrete structures with cracks which heal themselves},
  year         = {2012},
}

Chicago
Van Tittelboom, Kim, Manuel Dierick, and Nele De Belie. 2012. “Durable Concrete Structures with Cracks Which Heal Themselves.” In Tenth International Symposium on Brittle Matrix Composites, Proceedings, ed. AM Brandt, J Olek, MA Glinicki, and CKY Leung, 285–294. Cambridge, UK: Woodhead Publishing.
APA
Van Tittelboom, K., Dierick, M., & De Belie, N. (2012). Durable concrete structures with cracks which heal themselves. In AM Brandt, J. Olek, M. Glinicki, & C. Leung (Eds.), Tenth International Symposium on Brittle Matrix Composites, Proceedings (pp. 285–294). Presented at the Tenth International Symposium on Brittle Matrix Composites (BMC-10 - 2012), Cambridge, UK: Woodhead Publishing.
Vancouver
1.
Van Tittelboom K, Dierick M, De Belie N. Durable concrete structures with cracks which heal themselves. In: Brandt A, Olek J, Glinicki M, Leung C, editors. Tenth International Symposium on Brittle Matrix Composites, Proceedings. Cambridge, UK: Woodhead Publishing; 2012. p. 285–94.
MLA
Van Tittelboom, Kim, Manuel Dierick, and Nele De Belie. “Durable Concrete Structures with Cracks Which Heal Themselves.” Tenth International Symposium on Brittle Matrix Composites, Proceedings. Ed. AM Brandt et al. Cambridge, UK: Woodhead Publishing, 2012. 285–294. Print.