Multi-scale transport modelling and its application to the service life prediction of concrete structures
DIPC Seminars
- Speaker
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Ye Guang, TU Delft
- When
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2018/11/29
13:00 - Place
- Donostia International Physics Center
- Add to calendar
-
iCal
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. In this lecture a multiscale modelling scheme
to estimate the transport properties in cement-based materials (MMTC model) is
introduced. The MMTC model can capture 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. In general, chloride-
induced corrosion of steel rebars in the concrete is considered to be one of
the major causes of deterioration in reinforced concrete structures. The
potential applications of the MMTC model for predicting the service life of
reinforced concrete structures induced by chloride ingression is demonstrated
and compared to the DuraCrete model.
Host: Jorge Sánchez Dolado