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Ara es mostren els items 1-11 de 11

    • 3D zero-thickness interface model for fracture of cement-based materials with chemical degradation 

      Martínez Estévez, Ariadna; Liaudat, Joaquín; López Garello, Carlos María; Carol, Ignacio (2022-03)
      Article
      Accés obert
      In the framework of the Finite Element Method, zero-thickness interface elements have been widely used to model fracturing processes in quasi-brittle materials in a broad variety of problems. In particular, interface ...

    • Ataque ácido en cementos de antiguos pozos en repositorios de CO2 

      Martínez Estévez, Ariadna (Universitat Politècnica de Catalunya, 2016-05-27)
      Projecte Final de Màster Oficial
      Accés obert
      L’emmagatzemen de diòxid de carboni en medis geològics topa entre d’altres amb la preocupació per la generació de vies d’escap cap a l’atmosfera durant l’etapa de desenvolupament dels pous i producció d’aquest . Aquestes ...

    • 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)
      Text en actes de congrés
      Accés obert
      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 ...

    • 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)
      Text en actes de congrés
      Accés obert
      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 ...

    • Effect of long-term pore pressure evolution on the integrity of cement plugs of abandoned oil wells in CCS sites 

      Martínez Estévez, Ariadna; Liaudat, Joaquín; López Garello, Carlos María; Carol, Ignacio (International Centre for Numerical Methods in Engineering (CIMNE), 2021)
      Text en actes de congrés
      Accés obert
      In the context of Carbon Capture Storage (CCS) in abandoned hydrocarbon reservoirs, a preliminary study of the effects of pore pressure evolution on the integrity of oil-well cement seals is performed. A 2D cross-section ...

    • 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)
      Projecte/Treball Final de Carrera
      Accés obert

    • Estudio numérico del ataque ácido por CO2 en cementos de pozos de petróleo sellados 

      Martínez Estévez, Ariadna (Universitat Politècnica de Catalunya, 2020-06-29)
      Tesi
      Accés obert
      In order to cope with the serious and urgent problem of global warming, it is imperative to reduce the impact of CO2 emissions in the atmosphere. One of the alternatives proposed involves the injection of the CO2 in deep ...

    • 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
      Accés obert
      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 ...

    • New results in 3D-mesomechanical coupled analysis of external sulphate attack in concrete 

      Biscaro, Caterina; Martínez Estévez, Ariadna; Pérez Carreras, Adrià; López Garello, Carlos María; Xotta, G.; Carol, Ignacio (International Centre for Numerical Methods in Engineering (CIMNE), 2021)
      Text en actes de congrés
      Accés obert
      External Sulphate Attack (ESA) is one of the main degradation processes affecting concrete structures. It takes place when the concrete is in an environment rich in sulphate ions and with a high humidity index. Once it has ...

    • 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)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      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 ...

    • Zero-thickness interface model with chemical degradation by acid attack 

      Martínez Estévez, Ariadna; Liaudat, Joaquín; López Garello, Carlos María; Carol, Ignacio (2019)
      Text en actes de congrés
      Accés obert
      Carbon dioxide (CO2) storage in abandoned oil/gas reservoirs is considered a viable alternative to reduce greenhouse gas emissions to the atmosphere. An important element of the risk associated with long-term CO2 storage ...