Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Upscaling coarse-grained simulation study for hydrated cement paste from mesoscale to microscale
In this paper, upscaled mesoscale and microscale models are introduced for hydrated cementitious materials by employing the discrete element method and coarse-grained (CG) simulation. At the mesoscale, the hydration process is simulated using the grand canonical Monte Carlo (GCMC) process. Subsequently, an exploration of dynamic, structural, and mechanical properties ensues through mean square displacement (MSD), radial distribution function (RDF), pore systems analysis, and uniaxial tension tests are conducted based on the constructed CG C–S–H gel model. The structural and mechanical performance of this model affirms its consistency with previous experimental investigations. On the other hand, the microscale model is established based on an existing microstructure model of cement paste. Mechanical properties and failure mechanism analyses, influenced significantly by the inner microstructure and components (specifically the degree of hydration with a fixed water-to-cement ratio), are investigated using the uniaxial tension test. Additionally, the microscale simulation serves to validate the feasibility of modeling micro-scale cementitious materials with the discrete CG-MD method.
Upscaling coarse-grained simulation study for hydrated cement paste from mesoscale to microscale
In this paper, upscaled mesoscale and microscale models are introduced for hydrated cementitious materials by employing the discrete element method and coarse-grained (CG) simulation. At the mesoscale, the hydration process is simulated using the grand canonical Monte Carlo (GCMC) process. Subsequently, an exploration of dynamic, structural, and mechanical properties ensues through mean square displacement (MSD), radial distribution function (RDF), pore systems analysis, and uniaxial tension tests are conducted based on the constructed CG C–S–H gel model. The structural and mechanical performance of this model affirms its consistency with previous experimental investigations. On the other hand, the microscale model is established based on an existing microstructure model of cement paste. Mechanical properties and failure mechanism analyses, influenced significantly by the inner microstructure and components (specifically the degree of hydration with a fixed water-to-cement ratio), are investigated using the uniaxial tension test. Additionally, the microscale simulation serves to validate the feasibility of modeling micro-scale cementitious materials with the discrete CG-MD method.
Upscaling coarse-grained simulation study for hydrated cement paste from mesoscale to microscale
Ming Sun (Autor:in) / Tong Lv (Autor:in) / Jinrui Zhang (Autor:in)
2024
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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