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The use of superabsorbent polymers as a crack sealing and crack healing mechanism in cementitious materials

Didier Snoeck UGent, Kim Van Tittelboom UGent, Nele De Belie UGent, Stijn Steuperaert UGent and Peter Dubruel UGent (2012) Concrete repair, rehabilitation and retrofitting III. p.152-157
abstract
As concrete cracks due to its low tensile strength and as harmful fluids may migrate into these cracks, the durability of concrete is endangered if no proper treatment or manual repair is applied. To address this need, this research focusses on the use of superabsorbent polymers (1) to seal cracks from intruding potentially harmful substances and (2) to heal the crack due to further hydration and precipitation of calcium carbonate. The first focus relies on hindering the fluid flow by swelling of superabsorbent polymers after they are exposed to a humid environment. The sealing capacity was measured by means of water permeability tests and through visualization of permeability tests by neutron radiography. Superabsorbent polymers are able to seal cracks and thus allow a recovery in water-tightness as a decrease in permeability is noticed. The second focus relies on healing of small cracks in fibre reinforced cementitious materials, restoring the mechanical properties. The regain in mechanical properties was analyzed by four-point-bending tests and the crack closure was microscopically monitored. Cracks close through the combination of further hydration of unhydrated cement particles, precipitation of calcium carbonate and activation of the pozzolanic reaction of fly ash. Desorption of superabsorbent polymers triggers healing in the vicinity of crack faces and cracks up to 130 μm were able to close completely in wet/dry cycles due to the precipitation of calcium carbonate. Mortar samples containing superabsorbent polymers even showed partial healing when stored under a relative humidity of more than 60%. In this way, a smart cementitious material which is reliable and independent from the conditions is acquired.
Please use this url to cite or link to this publication:
author
organization
year
type
conference
publication status
published
subject
in
Concrete repair, rehabilitation and retrofitting III
editor
Mark G Alexander, Hans-Dieter Beushausen, Frank Dehn and Pilate Moyo
pages
152 - 157
publisher
CRC Press
place of publication
Leiden, The Netherlands
conference name
3rd International conference on Concrete Repair, Rehabilitation and Retrofitting (ICCRRR -2012)
conference location
Cape Town, South Africa
conference start
2012-09-03
conference end
2012-09-05
ISBN
9780415899529
language
English
UGent publication?
yes
classification
C1
copyright statement
I have transferred the copyright for this publication to the publisher
VABB id
c:vabb:339722
VABB type
VABB-5
id
2986548
handle
http://hdl.handle.net/1854/LU-2986548
date created
2012-09-13 15:10:50
date last changed
2012-09-14 13:37:26
@inproceedings{2986548,
  abstract     = {As concrete cracks due to its low tensile strength and as harmful fluids may migrate into these cracks, the durability of concrete is endangered if no proper treatment or manual repair is applied. To address this need, this research focusses on the use of superabsorbent polymers (1) to seal cracks from intruding potentially harmful substances and (2) to heal the crack due to further hydration and precipitation of calcium carbonate. The first focus relies on hindering the fluid flow by swelling of superabsorbent polymers after they are exposed to a humid environment. The sealing capacity was measured by means of water permeability tests and through visualization of permeability tests by neutron radiography. Superabsorbent polymers are able to seal cracks and thus allow a recovery in water-tightness as a decrease in permeability is noticed. The second focus relies on healing of small cracks in fibre reinforced cementitious materials, restoring the mechanical properties. The regain in mechanical properties was analyzed by four-point-bending tests and the crack closure was microscopically monitored. Cracks close through the combination of further hydration of unhydrated cement particles, precipitation of calcium carbonate and activation of the pozzolanic reaction of fly ash. Desorption of superabsorbent polymers triggers healing in the vicinity of crack faces and cracks up to 130 \ensuremath{\mu}m were able to close completely in wet/dry cycles due to the precipitation of calcium carbonate. Mortar samples containing superabsorbent polymers even showed partial healing when stored under a relative humidity of more than 60\%. In this way, a smart cementitious material which is reliable and independent from the conditions is acquired.},
  author       = {Snoeck, Didier and Van Tittelboom, Kim and De Belie, Nele and Steuperaert, Stijn and Dubruel, Peter},
  booktitle    = {Concrete repair, rehabilitation and retrofitting III},
  editor       = {Alexander, Mark G and Beushausen, Hans-Dieter and Dehn, Frank and Moyo, Pilate},
  isbn         = {9780415899529},
  language     = {eng},
  location     = {Cape Town, South Africa},
  pages        = {152--157},
  publisher    = {CRC Press},
  title        = {The use of superabsorbent polymers as a crack sealing and crack healing mechanism in cementitious materials},
  year         = {2012},
}

Chicago
Snoeck, Didier, Kim Van Tittelboom, Nele De Belie, Stijn Steuperaert, and Peter Dubruel. 2012. “The Use of Superabsorbent Polymers as a Crack Sealing and Crack Healing Mechanism in Cementitious Materials.” In Concrete Repair, Rehabilitation and Retrofitting III, ed. Mark G Alexander, Hans-Dieter Beushausen, Frank Dehn, and Pilate Moyo, 152–157. Leiden, The Netherlands: CRC Press.
APA
Snoeck, D., Van Tittelboom, K., De Belie, N., Steuperaert, S., & Dubruel, P. (2012). The use of superabsorbent polymers as a crack sealing and crack healing mechanism in cementitious materials. In M. G. Alexander, H.-D. Beushausen, F. Dehn, & P. Moyo (Eds.), Concrete repair, rehabilitation and retrofitting III (pp. 152–157). Presented at the 3rd International conference on Concrete Repair, Rehabilitation and Retrofitting (ICCRRR -2012), Leiden, The Netherlands: CRC Press.
Vancouver
1.
Snoeck D, Van Tittelboom K, De Belie N, Steuperaert S, Dubruel P. The use of superabsorbent polymers as a crack sealing and crack healing mechanism in cementitious materials. In: Alexander MG, Beushausen H-D, Dehn F, Moyo P, editors. Concrete repair, rehabilitation and retrofitting III. Leiden, The Netherlands: CRC Press; 2012. p. 152–7.
MLA
Snoeck, Didier, Kim Van Tittelboom, Nele De Belie, et al. “The Use of Superabsorbent Polymers as a Crack Sealing and Crack Healing Mechanism in Cementitious Materials.” Concrete Repair, Rehabilitation and Retrofitting III. Ed. Mark G Alexander et al. Leiden, The Netherlands: CRC Press, 2012. 152–157. Print.