Browsing by Author "Liaudat, Joaquín"
Now showing items 1-20 of 25
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3D zero-thickness interface model for fracture of cement-based materials with chemical degradation
(2022-03)
Article
Open AccessIn 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 ... -
ASR expansions at the level of a single glass-cement paste interface: experimental results and proposal of a reaction-expansion mechanism
(Elsevier, 2019-09)
Article
Open AccessA new experimental methodology for studying ASR expansions at the level of a single aggregate-cementitious matrix interface is proposed. For this methodology, small sandwich-like specimens, with cement paste or mortar on ... -
ASR expansions in concrete under triaxial confinement
(2018-02)
Article
Open AccessIt 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
(2017)
Conference report
Open AccessIn 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 ... -
Avoiding fracture instability in wedge splitting tests by means of numerical simulations
(CIMNE, 2017)
Conference report
Open AccessIn this paper, unstable fracture propagation obtained in a in-house performed experimental Wedge Splitting Test (WST) is simulated by means of the FEM and fracturebased zero-thickness interface elements. In order to obtain ... -
Coupled C-M meso-scale model for ASR expansion in concrete
(CRC Press/Balkema, 2018)
Conference report
Restricted access - publisher's policyAs 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 model for alkali-silica reaction in concrete
(CIMNE, 2013)
Conference report
Open AccessA new diffusion-reaction model for the potentially deleterious Alkali-Silica Reaction (ASR) process in concrete is presented. The model involves three coupled diffusion processes, two in-goingand one out-goingfrom the ... -
Diffusion-reaction modelling of the degradation of oil-well cement exposed to carbonated brine
(2017)
Conference report
Open AccessThe 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
(International Centre for Numerical Methods in Engineering (CIMNE), 2021)
Conference report
Open AccessIn 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 ... -
Experimental and numerical study of the effect of stress on ASR expansions in concrete
(Universitat Politècnica de Catalunya, 2018-06-15)
Doctoral thesis
Open AccessThis 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 ... -
Experimental study of the effects of mechanical restraints on ASR expansions in concrete
(2021-03)
Article
Open AccessThis paper summarizes an experimental campaign devoted to the study of the effect of (internal and external) mechanical restraints on Alkali-Silica Reaction (ASR) expansions in concrete made with sodalime (SL) glass as ... -
Free expansion tests for ASR at the level of a single aggregate-matrix interface: experimental results and numerical modelling
(Springer, 2015)
Conference report
Restricted access - publisher's policyAs 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, ... -
Model for alkali-silica reaction expansions in concrete using zero-thickness chemo-mechanical interface elements
(2020-12)
Article
Open AccessAlkali-Silica Reaction (ASR) is a particular type of chemical reaction in concrete, which produces cracking and overall expansion of the affected structural element due to the formation of expansive reaction products within ... -
Modeling concrete expansions via couped C-M mesoscale analysis with zero-thickness interface elements, and lab experiments
(ISTE-Wiley, 2017)
Conference report
Restricted access - publisher's policyThis 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 oil-well cement exposed to carbonated brine: effect of specimen geometry on experimental results
(CIMNE, 2019)
Conference report
Open AccessIn recent years, the authors and co-workers have developed a diffusion-reaction model for the degradation process of oil-well cements exposed to carbonated brines in the context of CO2 capture and storage in abandoned oil ... -
Modelling acid attack of oilwell cement exposed to carbonated brine
(John Gale, 2018-01)
Article
Open AccessA 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 ... -
Modelling acid attack of oilwell cement exposed to carbonated brine: effect of specimen geometry on experimental results
(2019)
Conference report
Open AccessIn recent years, the authors and co-workers have developed a diffusion-reaction model for the degradation process of oilwell cements exposed to carbonated brines in the context of CO2 capture and storage in abandoned oil ... -
Numerical and experimental study of ASR in concrete at the meso-level
(2016)
Conference report
Restricted access - publisher's policyIn 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
(American Society of Civil Engineers (ASCE), 2015)
Conference report
Restricted access - publisher's policyIn 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
(CIMNE, 2015)
Conference lecture
Open AccessThe 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 ...
