Shotcrete Elasticity Revisited in the Framework of Continuum Micromechanics: From Submicron to Meter Level

This paper focuses on the dependence of the elastic stiffness on the hydration degree. A two-step homogenization procedure is used: within a representative volume element of 50 to 100, cement grains, hydrates, water, and air build up polycrystal. At a larger scale, the aggregates are represented as spherical inclusions in a matrix built up by the aforementioned polycrystal. The input parameters for the model are w/c and a/c. On the basis of seven microelastic properties that are the same for different shotcretes, the chosen approach allows for the prediction of hydration degree-stiffness relationship for different shotcrete mixtures. On a structural level, this may change the estimated level of loading of a shotcrete tunnel shell during the first day after installation by more than 40%.

  • Availability:
  • Authors:
    • Hellmich, Christian
    • Mang, Herbert
  • Publication Date: 2005-6

Language

  • English

Media Info

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Filing Info

  • Accession Number: 01000885
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 1 2005 7:52PM