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A Preliminary Numerical Study on ITZ in Cementitious Composites

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Multi-Scale Modeling and Characterization of Infrastructure Materials

Part of the book series: RILEM Bookseries ((RILEM,volume 8))

Abstract

In this paper, two prevailing numerical models of cementitious hydration, i.e., the vector type model HYMOSTRUC3D and the pixel type model CEMHYD3D have been employed to simulate the microstructure of aggregate-ITZ-bulk paste. Specifically, a ternary blended system consisting of Portland cement-blast furnace slag-limestone filler is studied. Results indicate that the simulated phase compositions from both models agree well with afore-measured values by BSE-SEM image analysis method. ITZ differs much from bulk paste, i.e., higher porosity and lower anhydrous fraction. Besides that, the capillary pore connectivity and relative diffusivity of ITZ and bulk paste are estimated, while some significant differences can be detected about the corresponding values from the two numerical models.

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Author information

Authors and Affiliations

  1. Magnel Laboratory for Concrete Research, Department of Structural Engineering, Ghent University, Gent, Belgium

    Yun Gao & Geert De Schutter

  2. Microlab, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Delft, The Netherlands

    Guang Ye & Mingzhong Zhang

Authors
  1. Yun Gao
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  2. Geert De Schutter
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  3. Guang Ye
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  4. Mingzhong Zhang
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Corresponding author

Correspondence to Yun Gao .

Editor information

Editors and Affiliations

  1. KTH Royal Institute of Technology, Brinellvägen 23, Stockholm, 10044, Sweden

    Niki Kringos

  2. Dept. Civil & Architectural Engineering, Div. Soil- & Rock Mechanics, Royal Institute of Technology (KTH), Stockholm, 100 44, Sweden

    Björn Birgisson

  3. Georgia Institute of Technology, Technology Circle 210, Savannah, 31407, Georgia, USA

    David Frost

  4. Virginia Tech, N. Patton Hall 301, Blacksburg, 24061, Virginia, USA

    Linbing Wang

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© 2013 RILEM

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Gao, Y., De Schutter, G., Ye, G., Zhang, M. (2013). A Preliminary Numerical Study on ITZ in Cementitious Composites. In: Kringos, N., Birgisson, B., Frost, D., Wang, L. (eds) Multi-Scale Modeling and Characterization of Infrastructure Materials. RILEM Bookseries, vol 8. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-6878-9_8

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  • DOI: https://doi.org/10.1007/978-94-007-6878-9_8

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-007-6877-2

  • Online ISBN: 978-94-007-6878-9

  • eBook Packages: EngineeringEngineering (R0)

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