Details
| Original language | English |
|---|---|
| Pages (from-to) | 59-70 |
| Number of pages | 12 |
| Journal | Cement and Concrete Composites |
| Volume | 35 |
| Issue number | 1 |
| Publication status | Published - 16 Sept 2012 |
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.
Keywords
- Concrete, Multiscale, Thermal homogenization
ASJC Scopus subject areas
- Engineering(all)
- Building and Construction
- Materials Science(all)
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In: Cement and Concrete Composites, Vol. 35, No. 1, 16.09.2012, p. 59-70.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Computational thermal homogenization of concrete
AU - Wu, T.
AU - Temizer, I.
AU - Wriggers, P.
PY - 2012/9/16
Y1 - 2012/9/16
N2 - 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.
AB - 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.
KW - Concrete
KW - Multiscale
KW - Thermal homogenization
UR - http://www.scopus.com/inward/record.url?scp=84870476157&partnerID=8YFLogxK
U2 - 10.1016/j.cemconcomp.2012.08.026
DO - 10.1016/j.cemconcomp.2012.08.026
M3 - Article
AN - SCOPUS:84870476157
VL - 35
SP - 59
EP - 70
JO - Cement and Concrete Composites
JF - Cement and Concrete Composites
SN - 0958-9465
IS - 1
ER -