Now showing items 1-8 of 8

  • Evaluation of Rock Joint Coefficients 

    Audy, Ondřej; Ficker, Tomáš (IOP Science, UK, 2017-11-28)
    A computer method for evaluation of rock joint coefficients is described and several applications are presented. The method is based on two absolute numerical indicators that are formed by means of the Fourier replicas of ...
  • Fitting Function for Flexural Strength of Cement Paste 

    Ficker, Tomáš (IOPPublishing, 2017-11-28)
    There are many analytical expressions for compressive strength as functions of porosity of cement-based materials but only a few such expressions exist for flexural strength of these materials. In the present paper a new ...
  • Fractal Analysis of Rock Joint Profiles 

    Audy, Ondřej; Ficker, Tomáš (IOP Publishing, 2017-11-28)
    Surface reliefs of rock joints are analyzed in geotechnics when shear strength of rocky slopes is estimated. The rock joint profiles actually are self-affine fractal curves and computations of their fractal dimensions ...
  • Large Rock Reliefs and Their 3D Reconstructions 

    Audy, Ondřej; Ficker, Tomáš (IOP Publishing, 2017-11-28)
    Rock reliefs are used for assessing joint rock coefficients that serve in geotechnical engineering for computing shear strength of rock joints. The three-dimensional reliefs of small rock joints amounting to several ...
  • Macrodefects and Microdefects within Porous Cement Pastes 

    Ficker, Tomáš (IOP Publishing, 2017-11-28)
    It is shown that the mechanical strength of cement matrix (hydrated cement paste) is a result of competitive interplay between macrodefects and microdefects. The dominance of one of these two kinds of defects depends not ...
  • Rock Joint Asperities and Mechanical Strength of Concrete 

    Ficker, Tomáš; Komárková, Tereza (IOP Publishing, 2017-11-28)
    Mechanical interactions between concrete foundations of large civil engineering structures (tunnels, bridges or dams) and the asperity surfaces of rock masses represent a useful topic for investigation. It is obvious that ...
  • Rock Joint Coefficients Derived from the Three-Dimensional Fourier Reliefs 

    Audy, Ondřej; Ficker, Tomáš (IOP Publishing, 2017-11-28)
    Coefficients of rock joints serve in geotechnical practice for determining shear strength of rock masses. Evaluation of the stability of rocky terrains containing joints is important from the viewpoint of safety. Larger ...
  • Rupture Strength and Irregularity of Fracture Surfaces 

    Ficker, Tomáš (IOP Publishing, 2017-11-28)
    Textural irregularities of fracture surfaces of cement-based materials seem to be an interesting source of information on some mechanical properties. Besides compressive strength, the flexural strength is strongly correlated ...