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Applying a biodeposition layer to increase the bond of a repair mortar on a mortar substrate

Didier Snoeck (UGent) , Jianyun Wang (UGent) , D. P. Bentz and Nele De Belie (UGent)
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Abstract
One of the major concerns in infrastructure repair is a sufficient bond between the substrate and the repair material, especially for the long-term performance and durability of the repaired structure. In this study, the bond of the repair material on the mortar substrate is promoted via the biodeposition of a calcium carbonate layer by a ureolytic bacterium. X-ray diffraction and scanning electron microscopy were used to examine the interfaces between the repair material and the substrate, as well as the polymorph of the deposited calcium carbonate. The approximately 50 mu m thick biodeposition film on the mortar surface mostly consisted of calcite and vaterite. Both the repair material and the substrate tended to show a good adherence to that layer. The bond, as assessed by slant shear specimen testing, was improved by the presence of the biodeposition layer. A further increase was found when engineering the substrate surface using a structured pattern layer of biodeposition. (C) 2017 Elsevier Ltd. All rights reserved.
Keywords
BACTERIAL CARBONATE PRECIPITATION, INTERFACIAL TRANSITION ZONE, CONCRETE, SUBSTRATE, CEMENTITIOUS MATERIALS, SURFACE-TREATMENT, STRENGTH, CONSERVATION, VATERITE, EDX, X-Ray diffraction, Bond strength, Mortar, Bacteria, Biodeposition

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Chicago
Snoeck, Didier, Jianyun Wang, D. P. Bentz, and Nele De Belie. 2018. “Applying a Biodeposition Layer to Increase the Bond of a Repair Mortar on a Mortar Substrate.” Cement & Concrete Composites 86: 30–39.
APA
Snoeck, D., Wang, J., Bentz, D. P., & De Belie, N. (2018). Applying a biodeposition layer to increase the bond of a repair mortar on a mortar substrate. CEMENT & CONCRETE COMPOSITES, 86, 30–39.
Vancouver
1.
Snoeck D, Wang J, Bentz DP, De Belie N. Applying a biodeposition layer to increase the bond of a repair mortar on a mortar substrate. CEMENT & CONCRETE COMPOSITES. Oxford: Elsevier Sci Ltd; 2018;86:30–9.
MLA
Snoeck, Didier, Jianyun Wang, D. P. Bentz, et al. “Applying a Biodeposition Layer to Increase the Bond of a Repair Mortar on a Mortar Substrate.” CEMENT & CONCRETE COMPOSITES 86 (2018): 30–39. Print.
@article{8557500,
  abstract     = {One of the major concerns in infrastructure repair is a sufficient bond between the substrate and the repair material, especially for the long-term performance and durability of the repaired structure. In this study, the bond of the repair material on the mortar substrate is promoted via the biodeposition of a calcium carbonate layer by a ureolytic bacterium. X-ray diffraction and scanning electron microscopy were used to examine the interfaces between the repair material and the substrate, as well as the polymorph of the deposited calcium carbonate. The approximately 50 mu m thick biodeposition film on the mortar surface mostly consisted of calcite and vaterite. Both the repair material and the substrate tended to show a good adherence to that layer. The bond, as assessed by slant shear specimen testing, was improved by the presence of the biodeposition layer. A further increase was found when engineering the substrate surface using a structured pattern layer of biodeposition. (C) 2017 Elsevier Ltd. All rights reserved.},
  author       = {Snoeck, Didier and Wang, Jianyun and Bentz, D. P. and De Belie, Nele},
  issn         = {0958-9465},
  journal      = {CEMENT \& CONCRETE COMPOSITES},
  keyword      = {BACTERIAL CARBONATE PRECIPITATION,INTERFACIAL TRANSITION ZONE,CONCRETE,SUBSTRATE,CEMENTITIOUS MATERIALS,SURFACE-TREATMENT,STRENGTH,CONSERVATION,VATERITE,EDX,X-Ray diffraction,Bond strength,Mortar,Bacteria,Biodeposition},
  language     = {eng},
  pages        = {30--39},
  publisher    = {Elsevier Sci Ltd},
  title        = {Applying a biodeposition layer to increase the bond of a repair mortar on a mortar substrate},
  url          = {http://dx.doi.org/10.1016/j.cemconcomp.2017.11.001},
  volume       = {86},
  year         = {2018},
}

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