Now showing items 1-12 of 12

  • ASR expansions in concrete under triaxial confinement 

    Liaudat, Joaquín; Carol, Ignacio; López Garello, Carlos María; Saouma, Victor E. (2018-02)
    Article
    Restricted access - publisher's policy
    It is well known that the Alkali-Silica Reaction (ASR) expansion in concrete is influenced by the stress state of the material. However, the extent and nature of this influence is not completely understood due to the ...
  • Avoiding fracture instability in wedge splitting tests by means of numerical simulations 

    Liaudat, Joaquín; Garolera Vinent, Daniel; Martínez Estévez, Ariadna; Carol, Ignacio; Lakshmikantha, Ramasesha Mookanahallipatna; Alvarellos Iglesias, José (2017)
    Conference report
    Open Access
    In this paper, unstable fracture propagation obtained in a in-house performed experimentalWedge Splitting Test (WST) is simulated by means of the FEM and fracture- based zero-thickness interface elements. In order to obtain ...
  • Coupled C-M meso-scale model for ASR expansion in concrete 

    Liaudat, Joaquín; López Garello, Carlos María; Carol, Ignacio (CRC Press/Balkema, 2018)
    Conference report
    Restricted access - publisher's policy
    As part of an ongoing development, this paper presents a brief description of a new Chemo-Mechanical (C-M) model for the expansions due to Alkali-Silica Reaction (ASR) in concrete. This model has been formulated at the ...
  • Diffusion-reaction modelling of the degradation of oil-well cement exposed to carbonated brine 

    Martínez Estévez, Ariadna; Liaudat, Joaquín; López Garello, Carlos María; Carol, Ignacio (2017)
    Conference report
    Open Access
    The essential aspects of a diffusion-reaction model in development for the degradation process of oil-well cement exposed to carbonated brine are presented in this paper. The formulation consists of two main diffusion/reaction ...
  • Experimental and numerical study of the effect of stress on ASR expansions in concrete 

    Liaudat, Joaquín (Universitat Politècnica de Catalunya, 2018-06-15)
    Doctoral thesis
    Open Access
    This thesis aims at deepening in the understanding of the mechanisms by which the stress state affects the development of concrete expansions and cracking due to the Alkali-Silica Reaction (ASR). With this purpose, a ...
  • Free expansion tests for ASR at the level of a single aggregate-matrix interface: experimental results and numerical modelling 

    Liaudat, Joaquín; López Garello, Carlos María; Carol, Ignacio (Springer, 2015)
    Conference report
    Restricted access - publisher's policy
    As part of an on-going research project, a model being developed to simulate ASR in concrete is described. The formulation consists of the three main diffusion/reaction field equations for the concentrations of Alkali, ...
  • Modeling concrete expansions via couped C-M mesoscale analysis with zero-thickness interface elements, and lab experiments 

    Carol, Ignacio; Liaudat, Joaquín; López Garello, Carlos María (ISTE-Wiley, 2017)
    Conference report
    Restricted access - publisher's policy
    This paper briefly summarizes ongoing developments on C-M coupled modelling of concrete swelling due to external sulfate attack and due to alkali-silica reaction. Both models are based on a meso-mechanical model for concrete, ...
  • Modelling acid attack of oilwell cement exposed to carbonated brine 

    Liaudat, Joaquín; Martínez Estévez, Ariadna; López Garello, Carlos María; Carol, Ignacio (John Gale, 2018-01)
    Article
    Restricted access - publisher's policy
    A diffusion-reaction model for the carbonation process of oilwell cement exposed to carbonated brine under CO2 geological storage conditions is presented. The formulation consists of two main diffusion/reaction field ...
  • Numerical and experimental study of ASR in concrete at the meso-level 

    Liaudat, Joaquín; López Garello, Carlos María; Carol, Ignacio (2016)
    Conference report
    Restricted access - publisher's policy
    In this paper, an ongoing research project on the mechanisms of concrete deterioration due to Alkali-Silica Reaction (ASR) is presented, together with some preliminary results. The research program includes both experimental ...
  • Numerical modelling of ASR expansions in concrete 

    Liaudat, Joaquín; Martínez Estévez, Ariadna; López Garello, Carlos María; Carol, Ignacio (American Society of Civil Engineers (ASCE), 2015)
    Conference report
    Restricted access - publisher's policy
    In the context of a project to characterize and model the Alkali-Silica Reaction in concrete, the results of a series of tests on specimens with a single interface between aggregate and cement paste, and the comparison to ...
  • Numerical modelling of the wedge splitting test in rock specimens, using fracture-based zero-thickness interface elements 

    Liaudat, Joaquín; Garolera Vinent, Daniel; Martínez Benasat, Antonio; Carol, Ignacio; Lakashmikhanta, Ramasesha; Alvarellos, J. (CIMNE, 2015)
    Conference lecture
    Open Access
    The purpose of the Wedge Splitting Test (WST) is to generate stable mode I fracture crack along a pre-established path, and be able to measure the specific fracture energy parameter of the material GFI. The test is performed ...
  • Recent developments in durability mesomechanics of concrete, including cracking via interface elements 

    Liaudat, Joaquín; Rodríguez, Mariana; López Garello, Carlos María; Carol, Ignacio (American Society of Civil Engineers (ASCE), 2013)
    Conference report
    Open Access
    The mesomechanical model for concrete previously developed for purely mechanical actions, is used as the basis for coupled durability mechanics calculations. Until now, the phenomena studied include drying shrinkage, ...