Modeling the Linear Elastic Properties of Portland Cement Paste

This article focuses on computing the elastic moduli of cement paste at the micrometer scale by accounting for all the microstructure at that scale, yet treating the calcium-silicate-hydrate phase as an elastically homogeneous phase. More specifically, this article explores how finite element procedures combined with knowledge of individual phase moduli are used, in combination with a cement paste microstructure development model, to quantitatively predict elastic moduli as a function of degree of hydration, as measured by loss on ignition. Comparison between model predictions and experimental results are recommended for degrees of hydration of 50% or more, for a range of water-to-cement ratios. At early ages, the resolution of the typical 100 super 3 digital microstructure is not adequate to provide accurate results for the tenuous cement paste microstructure that one finds at low degrees of hydration. Elastic computations were made on higher resolution microstructures, up to 400 super 3, and compared to early age elastic moduli data. Increasing agreement with the present experiment was observed as the resolution increased, despite possible viscoelastic effects.

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  • Authors:
    • Haecker, C J
    • Garboczi, E J
    • Bullard, J W
    • Bohn, R B
    • Sun, Z
    • Shah, S P
    • Voigt, T
  • Publication Date: 2005-10

Language

  • English

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Filing Info

  • Accession Number: 01010990
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Nov 23 2005 7:28PM