Zhang, M; (2013) Multiscale Lattice Boltzmann-Finite Element Modelling of Transport Properties in Cement-based Materials. VSSD – Student Union: Delft, the Netherlands.

Text Multiscale Lattice Boltzmann-Finite Element Modelling of Transport Properties in Cement-based Materials.pdf - Accepted Version Access restricted to UCL open access staff Download (10MB)

Abstract

Cement-based materials are the most widely used man-made materials in the world. The durability of cement-based materials has been a major concern due to the premature failure and serviceability issues of many reinforced concrete structures. Durability of cement-based materials is to a large content dependent on their resistance to the ingress of aggressive species, such as chloride, sulfates and carbon dioxide, which is governed by different mechanisms including permeation, absorption, diffusion, or their combinations. Therefore, the primary factors governing the durability of reinforced concrete structures are the transport properties in cement-based materials, e.g. permeability and diffusivity, which depend on the evolution of their underlying microstructures over a wide range of length scales, concentration of aggressive species and environmental conditions, such as temperature, humidity and their variations. The main objective of this thesis is to develop a multiscale modelling scheme to estimate the transport properties in cement-based materials capturing the structural information at each scale and taking into account the influences of w/c ratio, time, chloride binding, degree of water saturation, chloride concentration, interfacial transition zone (ITZ), and aggregate content and shape.

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