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Adhesion of Coating

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Olivie Gabe – One of the best experts on this subject based on the ideXlab platform.

  • influence of the surface properties of concrete on the Adhesion of Coating characterization of the interface by peel test and ft ir spectroscopy
    Progress in Organic Coatings, 2011
    Co-Authors: Matthieu Horgnies, Pierre Willieme, Olivie Gabe

    Abstract:

    Abstract The understanding of the Adhesion between protective Coating and concrete is essential to ensure the aesthetic of buildings. Polyurea (PU) based Coating are mainly deposited on the surface of concrete, several days after demoulding. However, their Adhesion on concrete depends on different interlinked parameters. This study is based on the development of specific peel tests. A strengthened and porous membrane is introduced into the layer of liquid Coating before its crosslinking. This methodology ensures a reproducible debonding of the Coating/concrete system to measure the fracture energy. The fracture loci are then characterized by Fourier Transformed Infra-Red (FT-IR) spectroscopy. Results show that humid conditions of curing and long-term ageing strongly decrease the Adhesion of Coating. This weak Adhesion is related to the presence of large crystals of portlandite, the growth of efflorescence or the kinetics of carbonation that could close the porosity or induce a weak interface. The type of the mould is also significant because it could induce the tearing of the extreme surface of concrete during demoulding. This tearing increases the roughness and the open porosity that enhances the fracture energy. Finally, this study demonstrates that the Adhesion of PU Coating is mainly conditioned by the mechanical anchorage at the surface of concrete.

Matthieu Horgnies – One of the best experts on this subject based on the ideXlab platform.

  • influence of the surface properties of concrete on the Adhesion of Coating characterization of the interface by peel test and ft ir spectroscopy
    Progress in Organic Coatings, 2011
    Co-Authors: Matthieu Horgnies, Pierre Willieme, Olivie Gabe

    Abstract:

    Abstract The understanding of the Adhesion between protective Coating and concrete is essential to ensure the aesthetic of buildings. Polyurea (PU) based Coating are mainly deposited on the surface of concrete, several days after demoulding. However, their Adhesion on concrete depends on different interlinked parameters. This study is based on the development of specific peel tests. A strengthened and porous membrane is introduced into the layer of liquid Coating before its crosslinking. This methodology ensures a reproducible debonding of the Coating/concrete system to measure the fracture energy. The fracture loci are then characterized by Fourier Transformed Infra-Red (FT-IR) spectroscopy. Results show that humid conditions of curing and long-term ageing strongly decrease the Adhesion of Coating. This weak Adhesion is related to the presence of large crystals of portlandite, the growth of efflorescence or the kinetics of carbonation that could close the porosity or induce a weak interface. The type of the mould is also significant because it could induce the tearing of the extreme surface of concrete during demoulding. This tearing increases the roughness and the open porosity that enhances the fracture energy. Finally, this study demonstrates that the Adhesion of PU Coating is mainly conditioned by the mechanical anchorage at the surface of concrete.

Pierre Willieme – One of the best experts on this subject based on the ideXlab platform.

  • influence of the surface properties of concrete on the Adhesion of Coating characterization of the interface by peel test and ft ir spectroscopy
    Progress in Organic Coatings, 2011
    Co-Authors: Matthieu Horgnies, Pierre Willieme, Olivie Gabe

    Abstract:

    Abstract The understanding of the Adhesion between protective Coating and concrete is essential to ensure the aesthetic of buildings. Polyurea (PU) based Coating are mainly deposited on the surface of concrete, several days after demoulding. However, their Adhesion on concrete depends on different interlinked parameters. This study is based on the development of specific peel tests. A strengthened and porous membrane is introduced into the layer of liquid Coating before its crosslinking. This methodology ensures a reproducible debonding of the Coating/concrete system to measure the fracture energy. The fracture loci are then characterized by Fourier Transformed Infra-Red (FT-IR) spectroscopy. Results show that humid conditions of curing and long-term ageing strongly decrease the Adhesion of Coating. This weak Adhesion is related to the presence of large crystals of portlandite, the growth of efflorescence or the kinetics of carbonation that could close the porosity or induce a weak interface. The type of the mould is also significant because it could induce the tearing of the extreme surface of concrete during demoulding. This tearing increases the roughness and the open porosity that enhances the fracture energy. Finally, this study demonstrates that the Adhesion of PU Coating is mainly conditioned by the mechanical anchorage at the surface of concrete.