Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
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Elektrophoretische Oberflächenmodifikation von Carbonfasern für eine erhöhte Wechselwirkung zu zement-basierten Matrices
Concrete is the most essential construction material due to its high availability, low costs, excellent compressive strength, and high durability nature. However, cement-based composites possess some disadvantageous features, notably brittleness and diminished flexural/tensile strength. To surmount these challenges, the integration of reinforcement into cementitious materials becomes imperative. One of the most promising reinforcement materials is high-strength carbon fiber (CF), which manifests in forms such as dispersed short fibers, rebar, and textile to fabricate the carbon fiber-reinforced cementitious composite (CFRC). As opposed to traditional steel-reinforced structural elements, the chemically inert CF does not demand a thick protective cover, which enables the creation of slender-walled, resource-conserving structural components. However, CFRC materials exhibit poor interfacial adhesion between hydrophobic CF and enveloping cementitious matrices, thereby limiting the efficient force transfer at the interface. The commonly used polymeric impregnation for the CF multifilaments is susceptible to degradation under heightened temperatures, a circumstance adverse to structural integrity, particularly in fire scenarios. As an alternative, thermally stable inorganic binders characterized by exceedingly fine particulates emerge as suitable candidates for impregnation. This finely dispersed suspension penetrates the CF roving housing multitudes of filaments, inducing enhancements in bonding interactions among CF filaments as well as between the roving and the cement matrix. The dissertation at hand suggests an innovative approach that utilizes fine mineral particles as a coating material. Its core objective revolves around the advancement of the electrophoretic deposition (EPD) method for nano-silica (NS) onto CF surfaces, with the intention of enhancing interfacial bonding with cementitious matrices. To achieve this, a comprehensive exploration into the effects of voltage, treatment duration, and pH value ...
Elektrophoretische Oberflächenmodifikation von Carbonfasern für eine erhöhte Wechselwirkung zu zement-basierten Matrices
Concrete is the most essential construction material due to its high availability, low costs, excellent compressive strength, and high durability nature. However, cement-based composites possess some disadvantageous features, notably brittleness and diminished flexural/tensile strength. To surmount these challenges, the integration of reinforcement into cementitious materials becomes imperative. One of the most promising reinforcement materials is high-strength carbon fiber (CF), which manifests in forms such as dispersed short fibers, rebar, and textile to fabricate the carbon fiber-reinforced cementitious composite (CFRC). As opposed to traditional steel-reinforced structural elements, the chemically inert CF does not demand a thick protective cover, which enables the creation of slender-walled, resource-conserving structural components. However, CFRC materials exhibit poor interfacial adhesion between hydrophobic CF and enveloping cementitious matrices, thereby limiting the efficient force transfer at the interface. The commonly used polymeric impregnation for the CF multifilaments is susceptible to degradation under heightened temperatures, a circumstance adverse to structural integrity, particularly in fire scenarios. As an alternative, thermally stable inorganic binders characterized by exceedingly fine particulates emerge as suitable candidates for impregnation. This finely dispersed suspension penetrates the CF roving housing multitudes of filaments, inducing enhancements in bonding interactions among CF filaments as well as between the roving and the cement matrix. The dissertation at hand suggests an innovative approach that utilizes fine mineral particles as a coating material. Its core objective revolves around the advancement of the electrophoretic deposition (EPD) method for nano-silica (NS) onto CF surfaces, with the intention of enhancing interfacial bonding with cementitious matrices. To achieve this, a comprehensive exploration into the effects of voltage, treatment duration, and pH value ...
Elektrophoretische Oberflächenmodifikation von Carbonfasern für eine erhöhte Wechselwirkung zu zement-basierten Matrices
Li, Huanyu (Autor:in) / Mechtcherine, Viktor / Wang, Lei / Peled, Alva / Technische Universität Dresden
14.10.2023
Hochschulschrift
Elektronische Ressource
Englisch
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