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      Computational thermal homogenization of concrete

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      Author(s)
      Wu, T.
      Temizer, I.
      Wriggers, P.
      Date
      2013
      Source Title
      Cement and Concrete Composites
      Print ISSN
      0958-9465
      Volume
      35
      Issue
      1
      Pages
      59 - 70
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      Computational thermal homogenization is applied to the microscale and mesoscale of concrete sequentially. Microscale homogenization is based on a 3D micro-CT scan of hardened cement paste (HCP). Mesoscale homogenization is carried out through the analysis of aggregates which are randomly distributed in a homogenized matrix. The thermal conductivity of this matrix is delivered by the homogenization of HCP, thereby establishing the link between micro-mesoscale of concrete. This link is critical to capture the dependence of the overall conductivity of concrete on the internal relative humidity. Therefore, special emphasis is given to the effect of relative humidity changes in micropores on the thermal conductivity of HCP and concrete. Each step of homogenization is compared with available experimental data. © 2012 Elsevier Ltd. All rights reserved.
      Keywords
      Concrete
      Multiscale
      Thermal homogenization
      Hardened cement paste
      Internal relative humidity
      Mesoscale
      Micro CT
      Micro-scales
      Micropores
      Multiscales
      Randomly distributed
      Thermal homogenization
      Computerized tomography
      Concretes
      Thermal conductivity
      Permalink
      http://hdl.handle.net/11693/21135
      Published Version (Please cite this version)
      http://dx.doi.org/10.1016/j.cemconcomp.2012.08.026
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