Ángel Yustres

Ángel Yustres
University of Castilla-La Mancha · Construction and Civil Engineering

Ph.D. Civil Engineering

About

72
Publications
12,468
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707
Citations
Additional affiliations
December 2010 - present
University of Castilla-La Mancha
Position
  • Professor
Education
September 2003 - November 2008
October 1998 - September 2003

Publications

Publications (72)
Article
A macroscopic model based on a double-porosity approach is proposed to simulate the swelling caused by the subdivision of particles and aggregates that occurs when bentonites are hydrated under a high water content and low confinement. In the model, it is assumed that although the water that occupies this new porous structure can be considered mobi...
Article
This work reviews the recent progress in physical and mathematical modelling of electrochemically assisted soil remediation processes and focuses especially on those treatments that aim to remove organic pollution. It introduces the importance of modelling and simulation, not only to understand, but also to manage more efficiently the remediation o...
Article
Full-text available
This paper focuses on the evaluation of the mobility of four hexachlorocyclohexane (HCH) isomers by soil vapor extraction (SVE) coupled with direct electrokinetic (EK) treatment without adding flushing fluids. SVE was found to be very efficient and remove nearly 70 % of the four HCH in the 15‐days of the tests. The application of electrokinetics pr...
Article
This paper evaluates the combination of electrokinetic soil flushing (EKSF) with soil vapor extraction (SVE) for the removal of four hexachlorocyclohexane (HCH) isomers contained in a real matrix. Results demonstrate that the combination of EKSF and SVE can be positive, but it is required the application of high electric fields (3 V cm⁻¹) in order...
Article
Full-text available
In this paper, a simple precomputing procedure is proposed to improve the numerical performance of the technological application of critical state soil models. In these models, if associated plasticity is assumed, the normalization of the stress space allows both the yield surface and the plastic components of the elastoplastic matrix to be defined...
Article
The reactive transport framework ORCHESTRA was used to implement a dual porosity reactive transport system that accounts for mechanical processes relevant for confined swelling clays at full saturation. The new implementations are based on water retention data generated by molecular dynamics simulations, and on fundamental mechanical formulations....
Chapter
In this chapter, the importance of mathematical models to analyze the electrokinetic remediation process is highlighted. Due to the amount of coupled physicochemical, electrochemical, and electrokinetic phenomena that take place in this soil treatment, it is necessary to develop conceptual models and numerical tools that, combined with experimental...
Chapter
Soil is a natural porous material with fluids in its voids. The distribution of the space occupied by solid particles, water, and gases is fundamental to understanding soil behavior under the influence of external actions. The mineralogical and geochemical composition of the system and the characteristics of solid–liquid–gas complex under different...
Presentation
The deep geological repository concept for spent nuclear fuel considers many safety elements. Among them, compacted bentonite has been selected as the primary engineering barrier between the encapsulated radioactive waste and the host rock. Thermo-hydro-mechanical behaviour of this material has been studied in detail from an experimental and numeri...
Book
Los ejercicios incluidos en este Cuaderno pretenden “movilizar” los contenidos que los autores consideran básicos para el aprendizaje de la Mecánica de Suelos y la Geotecnia. Sin embargo, no es un cuaderno de iniciación. La resolución de los ejercicios se plantea asumiendo que el lector está familiarizado con la materia. El objetivo del Cuaderno, c...
Article
The water retention curve deduced with low water content data allows the modelling of the bentonite void ratio associated with the pores located inside the clay aggregates, or micropores. However, if both the water content and the microporosity continue to increase, the latter can no longer be directly obtained from the former, because, in that cas...
Article
The increasing needs for modelling of reactive transport phenomena in different areas of environmental modelling have led to the development of many numerical codes. However, many of them suffer from a lack of flexibility, which hinders the adaptation of the codes to new problems. Moreover, in many cases, changes can be done by a very reduced group...
Article
This work analyses the characterization of the hygric behaviour of a stone heritage material by solving the inverse problem using experimental data obtained from a water absorption by capillarity test (EN 15801). This common test is undemanding and requires relatively simple equipment as compared to other hygric characterization tests. For the solu...
Article
Full-text available
Technical communication is an extremely important soft skill for civil engineers at the workplace. Due to globalization trends this technical communication often should be performed in English. If we join the fact that undergraduate engineering programs in Spain have been taught exclusively in Spanish, with which in addition, in rare cases those pr...
Conference Paper
Full-text available
The proposed use of active clays for the isolation of radioactive wastes in deep geological repositories has been followed by a deeper understanding of this type of soils. This increased knowledge has led to the need for both conceptual and numerical models capable of capturing the main trends in behaviour and the different couplings between differ...
Conference Paper
Full-text available
Electrokinetic soil remediation (EKR) is one of the most promising techniques for decontamination of low permeability soils, in which the most classical techniques have been found to be less efficient. However, its practical application on a real scale has been rather limited since the phenomena involved in these processes are very complex. For thi...
Presentation
The study of the movement of solutes and their interaction with the solid phase of active clays is a problem of maximum interest in various geoenvironmental engineering applications, but especially in the deep geological disposal of spent nuclear fuel and other highly radioactive materials. The modelling of the physicochemical phenomena that determ...
Article
Full-text available
This paper presents a user-friendly tool—FLoW1D (One-Dimensional Water Flow)—for the estimation of parameters that characterize the unsaturated moisture transfer in porous building materials. FLoW1D has been developed in Visual Basic for Applications and implemented as a function of the well-known Microsoft Excel© spreadsheet application. The aim o...
Article
Electroosmotic permeability is a soil parameter that is fundamental for designing and implementing environmental remediation, dewatering, or soil stabilization processes. It presents a narrow range of variation compared to hydraulic permeability, so that in many occasions no experimental tests are carried out to determine it. Traditionally, the Hel...
Article
The good knowledge of the moisture transfer in materials used in the construction of architectonic cultural heritage is a key issue to define conservation and restoration actions. In recent years, numerical models are used in this field to improve the hygrothermal characterization of these materials. However, the structure of state functions involv...
Article
This paper presents a simplified method for the study of the soil-structure interaction problem for isolated footings on soils subjected to water content-related volume changes. The method is based on the 2D modelling of thermo-hydro-mechanical processes occurring in the soil and the soil–atmosphere interface, the calculation of the soil-footing sy...
Article
The monitoring of the structural behaviour of singular buildings and the environmental variables that affect them is an upward trend on a global scale. This paper presents a monitoring project of the building of the Institute of Technology (IT) of the University of Castilla-La Mancha in Cuenca, Spain. Different monitoring actions were carried out,...
Article
Frequency domain reflectometry is not typically used to characterise the water content distribution of building foundations. However, it is a consolidated technique in hydrology and irrigation engineering, which could be of interest in building engineering. In this article, an application procedure is proposed, and the installation of monitoring de...
Article
This work presents a study of the dissolution-precipitation processes of calcite in soil undergoing electrokinetic remediation processes. For this purpose, a numerical inspection of one of these processes in a calcareous soil (10% calcite content) contaminated with an of the organochlorine acid herbicide (3,6-dichloro-2-pyridinecarboxylic acid) was...
Article
This work presents a techno-economic study of the scaling-up of the electrochemically-assisted soil remediation (EASR) process of polluted soil. Four scales have been selected for the study: laboratory, bench, pilot and prototype, with a capacity of treating a volume of soil of 1 × 10-4, 2 × 10-3, 0.11 and 21.76 m3, respectively. This study analyse...
Article
The volumetric deformability of the microstructure of compacted active clays is linked to the water mass exchange with the macrostructural void space. Given that this exchange is determined by the difference in the chemical potential of water in these two structural levels, this work proposes to define a microstructural effective stress (understood...
Article
The erosion behaviour of bentonites is influenced by the ions concentration to which they are exposed, which could lead to link the erodibility of bentonite to salinity. However, changes in salinity produce further changes in bentonite hydration and swelling that are not always considered. The aim of this work is to apply a numerical model to inspe...
Article
In the treatment of a polluted soil, the pH has a strong impact on the development of different physicochemical processes as precipitation/dissolution, adsorption/desorption or ionic exchange. In addition, the pH determines the chemical speciation of the compounds present in the system and, consequently, it conditions the transport processes by whi...
Article
This article presents a numerical study of the transport phenomena involved in the electrokinetic remediation of soils polluted with polar pesticides. 2,4-Dichlorophenoxyacetic acid is used as a representative of this pesticide type. A one-dimensional configuration with two facing electrodes placed in electrolyte compartments and a cathodic overflo...
Article
A simple procedure is proposed to simulate a smooth transition from elastic to elastoplastic behaviour in Cam-Clay models. The procedure consists of the definition of an external constitutive surface where full yield is assumed, and an internal one that allows the definition of the position in which plastic strains start to appear before the extern...
Article
Abstract This work evaluated water transport that occurs in a partially saturated soil of low hydraulic permeability when undergoing an electrokinetic remediation process. The soil used was a compacted kaolinite. To evaluate a wide range of possible conditions, soil with three different initial water contents (10, 15 and 20%) was used, obtaining a...
Article
This paper proposes a calculation procedure to estimate the swelling pressure of bentonites. The experimental information needed to obtain the estimations can be obtained from relatively conventional tests, including the determination of the water retention curve, and swelling pressure tests using oedometric sample holders. This allows to obtain ph...
Conference Paper
Full-text available
Traditionally, Spanish schools of civil engineering provide their students a class on “Technical English” in order to develop their language skills. However, this class does not cover all the skills that the student would need in the labor market and mainly focuses in the reading and writing skills, and in a lower degree in the speaking and listeni...
Article
This paper presents a formulation to incorporate the influence of water salinity on the swelling behaviour of a MX-80 bentonite into previously developed hydro-mechanical models that can reproduce swelling under dilute conditions. The effects of salinity on macro- and microstructural water chemical potentials were introduced. In addition, a descrip...
Article
This study compares the capabilities of two numerical models that simulate the behaviour of compacted saturated MX-80 bentonite exposed to different chemical environments. Both codes have different approaches: one of them is a reactive transport model, and the other is a hydrogeomechanical model. The study shows that the combined use of both approa...
Article
A simple procedure is proposed to reduce the error in the calculation of the stresses when simulating stress paths applying explicit stress integration schemes in Cam-Clay models with an associated flow rule. The procedure consists of defining the value of the preconsolidation stress (the hardening parameter of a Cam-Clay model) so that the drift o...
Article
Models of electrokinetic soil remediation systems have been developed significantly in recent decades. A wide range of physicochemical phenomena occurs in this type of process, which makes it difficult to capture all of the system’s complexity in a model. Therefore, existing models do not attempt to simulate the behaviour of the entire geochemical...
Article
An approach is proposed for simulating the coupled processes of swelling and mechanical erosion of compacted MX-80 bentonites. The loss of mass at the water–soil interface is described by means of a simplified erosion model, assuming the “instantaneous” activation of erosion. A double-porosity formulation was adopted based on the Barcelona Expansiv...
Article
This study focuses on the evaluation of the electrokinetic soil flushing (EKSF) strategy to remediate soil following a simulated spill of the herbicide oxyfluorfen. EKSF is attained by placing (in the soil mockup) two rows of electrodes of different polarity facing each other. The results are compared with those obtained in a reference experiment i...
Article
Full-text available
This study focuses on evaluating the application of electrokinetic soil flushing (EKSF) technologies to remediate soil polluted with 2,4-dichlorophenoxyacetic acid (2,4-D). This compound was selected as an example of polar herbicides that may cause soil percolation and groundwater contamination due to its high water solubility, lifetime and mobilit...
Article
The current research proposes a method for obtaining the intra-aggregate (microstructural) and inter-aggregate (macrostructural) water content of MX-80 bentonite using data from water retention curves. Data associated with high suction were used to define the microstructural water content model. By extrapolating this model to low suction, microstru...
Article
Full-text available
Electrokinetic processes provide the basis of a range of very interesting techniques for the remediation of polluted soils. These techniques consist of the application of a current field in the soil that develops different transport mechanisms capable of mobilizing several types of pollutants. However, the use of these techniques could generate non...
Article
Full-text available
Soils polluted with 2,4-D (model of ionic herbicide) can be remediated using a fence of alternating anodes and cathodes surrounding the main contamination point. This works reports results obtained in case study consisting of a 175 dm3 pilot plant, in which a soil polluted with an average concentration of 20 mg kg−1 of 2,4-D (spread by simulating a...
Article
This article proposes a new plastification mechanism to model bentonite free swelling processes by using an elastoplastic approach. The formulation is based on an interaction function that defines the plastic macrostructural strains induced by microstructural effects. This term is defined as a function of the microstructural void ratio, and it esta...
Article
This article describes the multicriteria Monitoring and Alert System designed to allow safe access to Santos Morcillo Lake (located in Ruidera Lakes Natural Park, Central Spain). In the spring of 2007, two families of cracks were observed on both banks of the lake, located near the barrage separating it from the downstream Batana Lake. A sinkhole w...
Article
Using multiphysics computer codes has become a useful tool to solve systems of partial differential equations. However, these codes do not always allow for the free introduction of implicitly defined state functions when automatic differentiation is used to compute the iteration matrix. This makes it considerably more difficult to solve geomechanic...
Article
A constitutive model of the volumetric behaviour of bentonite aggregates is proposed. The model is based on a state function to define the inter-aggregate (microstructural) void ratio and on a mass transfer function to calculate the mass exchange between macrostructural and microstructural water. Although both functions have been used previously fo...
Article
The sustainability of groundwater resources has been a central issue in the Upper Guadiana Basin (Spain) since two of its primary aquifer units were declared overexploited at the end of the 1990s. Three hydrogeological aquifer units located to the north of the primary aquifers have rarely been studied because of their low economic value, despite a...
Conference Paper
Full-text available
The application of outcome-based estimators in the quality assessment of the learning process is a tool of great interest, particularly when the estimators can be applied during the teaching period to identify and correct dysfunctions that may interfere with the learning process. However, the estimators that are commonly used are designed to be app...
Article
Full-text available
Parameter identification is one of the key elements in the construction of models in geosciences. However, inherent difficulties such as the instability of ill-posed problems or the presence of multiple local optima may impede the execution of this task. Regularization methods and Bayesian formulations, such as the maximum a posteriori estimation a...
Article
This article discusses how sensitivity analysis is a sound assessment tool for selecting the most efficient stabilization method of slopes at failure. A discretized form of the variational approach is used not only for performing sensitivity analysis but to locate the critical slip surface, i.e., the sensitivity analysis is carried out in the same...
Article
This article presents the study conducted and the actions taken to stabilise the foundations of 25 low-rise (two/three-storey) buildings in Alcazar de San Juan (Ciudad Real, central Spain). Owing to the immediate attention required, it was decided that the study would focus on procuring a synthetic model that would be able to provide a satisfactory...
Article
Cited By (since 1996): 2, Export Date: 5 October 2010, Source: Scopus, CODEN: CGEOE, doi: 10.1016/j.compgeo.2009.01.008, Language of Original Document: English, Correspondence Address: Navarro, V.; Geoenvironmental Group, Civil Engineering School, University of Castilla-La Mancha, Avda. Camilo José Cela s/n, 13071 Ciudad Real, Spain; email: vicente...
Article
The Upper Guadiana Basin is a semi-arid region located in the centre of Spain. From a morphological point of view it is a very flat region. Rivers just have ephemeral streams which usually infiltrate into the aquifers. So groundwater flow plays an important role in this basin. Since late in 1970s intensive water abstractions have been carried out i...
Article
This paper presents a study on the application of granite fines (GF) originating from the granite industry in the Northwest of Spain for the construction of embankment fills. A numerical solver was developed to simulate the unsaturated consolidation of a compacted earthfill (water content close to saturation), introducing the effect of secondary co...
Article
Soil air is compressed ahead of the wetting front in flood irrigation when the water table is close to the ground surface and the soil is clayey. The general perception is that a two-dimensional two-phase flow model should be used to take into account the effects of air compression on infiltration. In this paper, we apply a model of this kind to va...
Article
Export Date: 5 October 2010, Source: Scopus, CODEN: EGGOA, doi: 10.1016/j.enggeo.2008.03.002, Language of Original Document: English, Correspondence Address: Navarro, V.; Geoenvironmental Group, School of Civil Engineering, University of Castilla-La Mancha, Avda Camilo José Cela s/n, 13071 Ciudad Real, Spain; email: vicente.navarro@uclm.es, Referen...
Article
This paper presents a methodology, implemented into a computer code, to support the interpretation of dynamic penetration super-heavy (DPSH) soil tests. The program is based on the analysis of variance (Anova) to evaluate the equality of means of groups of number of blows. The aim was to assess the identification of the different layers constitutin...
Article
Cited By (since 1996): 1, Export Date: 5 October 2010, Source: Scopus, CODEN: GINTF, doi: 10.1680/gein.2008.15.4.296, Language of Original Document: English, Correspondence Address: Navarro, V.; University of Castilla-La Mancha, Avda. Camilo José Cela s/n, 13071 Ciudad Real, Spain; email: vicente.navarro@uclm.es, References: Amigó, E., Aguiar, E.,...
Article
An analysis was carried out on seepage through the side slopes of small water impoundments where only one geotextile was placed below the impermeable geomembrane. This study focuses on the characterisation of the flow associated with circular defects of small dimension. It was found that these types of defects produce reduced flow rates that are di...
Article
Full-text available
Trees growing close to buildings in urban landscapes may change soil moisture around foundations, producing shrinkage and swelling. We present a numerical solver which enables us to evaluate the movements resulting from these volumetric strains. This tool will be of assistance both in designing the foundations of new buildings, and in the analysis...
Article
Cited By (since 1996): 1, Export Date: 5 October 2010, Source: Scopus, CODEN: CGEOE, doi: 10.1016/j.compgeo.2007.01.007, Language of Original Document: English, Correspondence Address: Navarro, V.; Geoenvironmental Group, Civil Engineering School, University of Castilla-La Mancha, Avda. Camilo José Cela s/n, 13071 Ciudad Real, Spain; email: vicente...
Article
This paper analyzes the application of a grid-search approach for the estimation of modified Cam clay parameters from triaxial tests. By means of the systematic sampling of the error, in addition to locating the area presenting the smallest error, its ‘‘roughness’’, is also characterized. This is a valuable information to evaluate the quality of th...
Article
Cited By (since 1996): 1, Export Date: 5 October 2010, Source: Scopus, CODEN: GTJOD, Language of Original Document: English, Correspondence Address: Navarro, V.; University of Castilla-La Mancha, Camilo José Cela s/n, 13071, Ciudad Real, Spain, References: Bo, M.W., Choa, V., Wong, K.S., Compression tests on a slurry using a small-scale consolidome...
Article
When considering the durability and performance of concrete structures, the characterisation of the moisture distribution becomes a question of major concern. In this paper, a new approach for the characterization of the flow parameters, either under saturated or partially saturated conditions, is presented. The method is based on numerical back-an...
Article
Full-text available
A new tool for characterizing the soil-moisture changes caused by trees growing close to foundations is presented. The movements induced in foundations in the proximity of roots, related with shrinkage/swelling caused by those changes in soil moisture, can be evaluated this new tool.