Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Nanosilica-based post-treatment of hardened cement-based materials: The underlying physics
Abstract We study here the imbibition of a nanosilica-based product in a hardened cement-based material along with the consequences of the product on transport properties. We use X-ray microtomography to assess the liquid ingress in the cement-based matrix as a function of time. We moreover measure the consequences of the nanosilica treatment on water absorption and chloride penetration. Our results suggest that nano-silica imbibition in cement-based materials involves some deep particle clogging and, in turn, some phase separation in the porous cement-based material. As a consequence, the effective local concentration of nano-silica increases in a clogged zone located between a critical clogging depth and the surface. In this zone, the silica concentration level in the porosity allows for the formation of a physical barrier inside the material, which can, in turn, affect transport properties.
Nanosilica-based post-treatment of hardened cement-based materials: The underlying physics
Abstract We study here the imbibition of a nanosilica-based product in a hardened cement-based material along with the consequences of the product on transport properties. We use X-ray microtomography to assess the liquid ingress in the cement-based matrix as a function of time. We moreover measure the consequences of the nanosilica treatment on water absorption and chloride penetration. Our results suggest that nano-silica imbibition in cement-based materials involves some deep particle clogging and, in turn, some phase separation in the porous cement-based material. As a consequence, the effective local concentration of nano-silica increases in a clogged zone located between a critical clogging depth and the surface. In this zone, the silica concentration level in the porosity allows for the formation of a physical barrier inside the material, which can, in turn, affect transport properties.
Nanosilica-based post-treatment of hardened cement-based materials: The underlying physics
El Haddaji, Badreddine (Autor:in) / Keita, Emmanuel (Autor:in) / Fabien, Aurélie (Autor:in) / Aimedieu, Patrick (Autor:in) / Sebaibi, Nassim (Autor:in) / Collet, Pascal (Autor:in) / Andres, Valery (Autor:in) / Porcheron, Thomas (Autor:in) / Van Damme, Henri (Autor:in) / Audibert-Hayet, Annie (Autor:in)
26.05.2023
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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