Now showing items 1-17 of 17

  • 3D-mesomechanical analysis of external sulfate attack in concrete 

    Pérez Carreras, Adrià; Riera Bayo, Celia; López Garello, Carlos María; Carol, Ignacio (2017)
    Conference report
    Open Access
    The present study focuses on degradation of concrete by external sulfate attack. The numerical model developed by the MECMAT/UPC group, incorporates coupled C-M analysis using a meso-mechanical approach with discrete ...
  • 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 ...
  • 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-controlled and creep-mitigated ASR damage via microplane model: II. Material degra- dation, drying, and verification 

    Rahimi-Aghdam, Saeed; P. Bažant, Zdenek; Caner, Ferhun Cem (American Society of Civil Engineers (ASCE), 2016-10-28)
    Article
    Open Access
    The theory for the material and structural damage due to the alkali-silica reaction (ASR) in concrete is calibrated and validated by finite element fitting of the main test results from the literature. The fracture mechanics ...
  • Durabilidad del hormigón con fibras de acero 

    Blanco Álvarez, Ana (Universitat Politècnica de Catalunya, 2008-09)
    Minor thesis
    Open Access
    La durabilidad es uno de los aspectos más importantes de los hormigones puesto que tiene una incidencia fundamental en la vida útil de las estructuras. Éstas deben ser capaces de resistir, además de las solicitaciones ...
  • Effects of biaxial confinement in mortars exposed to external sulfate attack 

    Ikumi Montserrat, Tai; Segura Pérez, Ignacio; Pialarissi Cavalaro, Sergio Henrique (2019-01)
    Article
    Restricted access - publisher's policy
    Research on external sulfate attack (ESA) is usually performed on small scale specimens under free expanding conditions. However, most field structures cannot expand freely due to confinement induced by the ground or other ...
  • Estudio experimental de la expansiones por reacción álcali-sílice a nivel de la interfase pasta de cemento-agregado 

    Martínez Estévez, Ariadna (Universitat Politècnica de Catalunya, 2014-06)
    Master thesis (pre-Bologna period)
    Open Access
  • Evolution of pyrrhotite oxidation in aggregates for concrete 

    Oliveira da Silva, Izelman; Pialarissi Cavalaro, Sergio Henrique; Aguado de Cea, Antonio (2014-11-17)
    Article
    Open Access
    Rocks containing pyrrhotite bands are sometimes used to produce concrete. These rocks oxidize and produce long-term expansive reactions that damage concrete structures, leading to important economic and risk related ...
  • 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, ...
  • New tension-compression damage model for complex analysis of concrete structures 

    Paredes, Jairo A.; Oller Martínez, Sergio Horacio; Barbat Barbat, Horia Alejandro (American Society of Civil Engineers (ASCE), 2016-10)
    Article
    Open Access
    A new damage model, based on continuum damage mechanics and simulating the opening, closing, and reopening of cracks in concrete using only one surface of discontinuity, is proposed in this article. The model complies with ...
  • 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 assessment of external sulfate attack in concrete structures: a review 

    Ikumi Montserrat, Tai; Segura Pérez, Ignacio (2019-07)
    Article
    Restricted access - publisher's policy
    The slow progress of the external sulfate attack and the large size and criticality of typical structures affected by this phenomenon establish numerical modeling as a key tool to assess the future evolution of concrete ...
  • 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 ...
  • Simplified analytical assessment of damage induced by the external sulphate attack in concrete piles 

    Ikumi Montserrat, Tai; Pialarissi Cavalaro, Sergio Henrique; Segura Pérez, Ignacio; Goodier, Chris; Austin, Simon (Springer, 2017)
    Conference lecture
    Restricted access - publisher's policy
    Underground structures and foundations, including piles, constructed with reinforced concrete may be in contact with sulphate-rich soils and water. Structural elements exposed to these conditions may be affected by an ...
  • Simplified methodology to evaluate the external sulfate attack in concrete structures 

    Ikumi Montserrat, Tai; Pialarissi Cavalaro, Sergio Henrique; Segura Pérez, Ignacio; Fuente Antequera, Albert de la; Aguado de Cea, Antonio (2016-01)
    Article
    Open Access
    The external sulfate attack is a degradation process that causes expansion and cracking in concrete structures. Due to the absence of simplified methodologies to predict the potential damage, codes specify that sulfate ...
  • Simplified model to assess the durability of elements subjected to external sulphate attack: influence of shape and size of the elements 

    Ikumi Montserrat, Tai; Pialarissi Cavalaro, Sergio Henrique; Segura Pérez, Ignacio; Fuente Antequera, Albert de la; Aguado de Cea, Antonio (2016)
    Conference report
    Restricted access - publisher's policy
    The mitigation of the external sulfate attack from the standpoint of the design of concrete structures is usually based on the use of cement with limited content of aluminates. Nevertheless, other parameters may affect the ...
  • The role of porosity in external sulphate attack 

    Ikumi Montserrat, Tai; Pialarissi Cavalaro, Sergio Henrique; Segura Pérez, Ignacio (2019-03)
    Article
    Restricted access - publisher's policy
    Design codes promote a limitation of permeability (indirectly of porosity) to reduce the sulphate ingress and improve the resistance of concrete and mortar to external sulphate attack (ESA). However, porosity could also ...