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Efficiency of self-healing cementitious materials with encapsulated polyurethane to reduce water ingress through cracks

Bjorn Van Belleghem (UGent) , Kim Van Tittelboom (UGent) and Nele De Belie (UGent)
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Abstract
Cracks in reinforced concrete elements can cause major durability issues due do the accelerated ingress of aggressive substances. In this study, repair of cracks was addressed by incorporating encapsulated polyurethane based healing agents in the cementitious material as an autonomous healing mechanism. Capillary sorption tests showed that a high viscosity healing agent could reduce the water ingress in cracked mortar, but a large scatter in the results was found, resulting in a large range of healing efficiencies (18 -108%). The low viscosity polyurethane showed a more complete and consistent crack healing. Healing efficiencies ranging from 95 to 124% were observed (crack width up to 295 mu m). The proposed healing mechanism is very effective in blocking the ingress of water. This will enhance the durability of cementitious materials and consequently extend their lifetime.
Keywords
CONCRETE, COMPOSITES, MICROFIBERS, PERFORMANCE, BACTERIA, Mortar, Polymer, Durability, Ttransport properties

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Chicago
Van Belleghem, Bjorn, Kim Van Tittelboom, and Nele De Belie. 2018. “Efficiency of Self-healing Cementitious Materials with Encapsulated Polyurethane to Reduce Water Ingress Through Cracks.” Materiales De Construccion 68 (330).
APA
Van Belleghem, B., Van Tittelboom, K., & De Belie, N. (2018). Efficiency of self-healing cementitious materials with encapsulated polyurethane to reduce water ingress through cracks. MATERIALES DE CONSTRUCCION, 68(330).
Vancouver
1.
Van Belleghem B, Van Tittelboom K, De Belie N. Efficiency of self-healing cementitious materials with encapsulated polyurethane to reduce water ingress through cracks. MATERIALES DE CONSTRUCCION. Madrid: Inst Ciencias Construccion Eduardo Torroja; 2018;68(330).
MLA
Van Belleghem, Bjorn, Kim Van Tittelboom, and Nele De Belie. “Efficiency of Self-healing Cementitious Materials with Encapsulated Polyurethane to Reduce Water Ingress Through Cracks.” MATERIALES DE CONSTRUCCION 68.330 (2018): n. pag. Print.
@article{8591232,
  abstract     = {Cracks in reinforced concrete elements can cause major durability issues due do the accelerated ingress of aggressive substances. In this study, repair of cracks was addressed by incorporating encapsulated polyurethane based healing agents in the cementitious material as an autonomous healing mechanism. Capillary sorption tests showed that a high viscosity healing agent could reduce the water ingress in cracked mortar, but a large scatter in the results was found, resulting in a large range of healing efficiencies (18 -108\%). The low viscosity polyurethane showed a more complete and consistent crack healing. Healing efficiencies ranging from 95 to 124\% were observed (crack width up to 295 mu m). The proposed healing mechanism is very effective in blocking the ingress of water. This will enhance the durability of cementitious materials and consequently extend their lifetime.},
  articleno    = {UNSP e159},
  author       = {Van Belleghem, Bjorn and Van Tittelboom, Kim and De Belie, Nele},
  issn         = {0465-2746},
  journal      = {MATERIALES DE CONSTRUCCION},
  language     = {eng},
  number       = {330},
  pages        = {11},
  publisher    = {Inst Ciencias Construccion Eduardo Torroja},
  title        = {Efficiency of self-healing cementitious materials with encapsulated polyurethane to reduce water ingress through cracks},
  url          = {http://dx.doi.org/10.3989/mc.2018.05917},
  volume       = {68},
  year         = {2018},
}

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