Juan Carlos Ruge - Academia.edu (original) (raw)
Papers by Juan Carlos Ruge
DYNA, 2017
Algunas estructuras de contención de acuerdo con su diseño geotécnico y plan de construcción pred... more Algunas estructuras de contención de acuerdo con su diseño geotécnico y plan de construcción predefinido. Por supuesto, esto no extrapolable a todos los sitios de análisis, sin embargo, en Brasilia, donde predominan los suelos residuales y lateralizados, se obtienen las mejores resistencias mecánicas en los estratos porosos durante la estación seca. Esto significa que es controlada por la succión del suelo, es decir, el comportamiento del material presenta una dependencia de la respuesta no saturada del medio. En términos numéricos, para predecir el comportamiento suelo-estructura fue necesario incluir la interacción atmósfera-suelo en una herramienta computacional, utilizando un modelo hipoplástico. El trabajo detalla de esta manera las simulaciones numéricas de una estructura de retención fundada en el suelo tropical de Brasilia. La estructura fue monitoreada en términos de desplazamiento, a lo largo de las estaciones locales secas y húmedas, y fue simulada por una ley constituti...
E3S Web of Conferences, 2016
The main objective of the current research is to analyze through the use of elemental simulations... more The main objective of the current research is to analyze through the use of elemental simulations, unsaturated tests executed on soils with metastable characteristics (Brasilia porous clay), which due to high porosity and kind of cementation, presents a structure temporally unstable when undergoing an increasing of wetting and/or variation of the stress state, resulting in the most of cases in a significant change of volume denominated collapse. The tests were done in the Geotechnical Lab from the University of Brasilia and Geological Institute from Charles University in Prague, considering characterization tests for the identification of the basic properties, tests for determination of the characteristic curve, consolidation, direct shear and triaxial, in both conditions saturated and unsaturated, as well as the porosimetry test, for the study of the mechanical behavior. The tests were reproduced using numerical modeling to elemental level, involving a hypoplastic model for the unsaturated soils behavior.
International Journal of GEOMATE, 2018
Journal of Physics: Conference Series
Fatigue cracking by loading is one of the main mechanisms of damage to asphalt mixtures in servic... more Fatigue cracking by loading is one of the main mechanisms of damage to asphalt mixtures in service. Several studies worldwide have been conducted to try to understand the response that hot-mix asphalt undergo under this mechanism of damage. Despite the above, the fatigue phenomenon in asphalt mixtures is still not fully understood. The current research hypothesizes that the response under repeated loading of asphalt mixtures in fatigue tests can be more clearly understood through the one obtained under monotonic loading. For this reason, this study presents the results of the first phase of the research in which beams of asphalt mixtures were subjected to flexion using monotonic loads. The above, to correlate the evaluated properties with those obtained in a second phase where the response of the beams under repeated load (fatigue) will be measured. Beams made of two hot-mix asphalt mixes, two asphalt contents, and two different thicknesses were subjected to flexural strength tests....
Journal of Physics: Conference Series
The Pinhole test is an empirical probe with a qualitative classification foundation that identifi... more The Pinhole test is an empirical probe with a qualitative classification foundation that identifies fine-grained soils with dispersive potential using hydraulic heads. However, the original technique was designed to identify dispersive clays. In some cases, it is misused as a quantitative test for measuring subsurface erosion rates. This paper presents a physicochemical modification to the exact test, based on adding a dispersant in the sample compaction water. For the quantitative evaluation of the susceptibility of the soil to generate internal tubification or piping, the effects of hydraulic load, flow, and orifice diameter before and after the execution of the test are explored—both for the samples treated with deflocculant and for those compacted using distilled water. Additionally, to complete the identification results, physical and chemical approaches were applied as methods of comparison. The results obtained from the altered soils indicate a significant increase in the cla...
Th is paper presents a probabilistic analysis of two mix designs of High Performance Concrete as ... more Th is paper presents a probabilistic analysis of two mix designs of High Performance Concrete as a first step in obtaining a statistical model that achieves expressing its results in a more useful way, allowing to determine the potential strength and quality of concrete. The analysis of results of concrete compressive strength test was conducted by using statistical software called SPSS, which by means of different statistical variables, permitted to explore as to whether the frequency distribution corresponded that normally seen in conventional concrete. The results show the distribution or tendency of resistance of each of the designs, and the variation in specific resistance; they also rigorously reflect the importance of knowing both the properties of the concrete mix as well as the procedure for the methods of trial.
2021 Congreso Internacional de Innovación y Tendencias en Ingeniería (CONIITI)
Journal of Physics: Conference Series, 2021
The study of the physicochemical activity of clays is essential to understand the mechanical-hydr... more The study of the physicochemical activity of clays is essential to understand the mechanical-hydraulic behavior. The experimental analysis of the expansivity of soils is linked to the content of clay minerals present in the tactoid tissue, which affect is directly in proportion to the volumetric change that soil may undergo. This work aims to carry out an analysis to understand the expansive behavior of the proposed clay materials, using different techniques, both conventional and modern. For this purpose, the bentonite clay used with a majority montmorillonite component was analyzed through petrographic tests and images analysis. The samples with a base material and different contents of montmorillonite were prepared. Montmorillonite is a clay mineral with a very high swelling potential because even when it was used in low proportions on a sandy base material, the influence of the material is strong and the expansivity remained high.
Revista Internacional De Metodos Numericos Para Calculo Y Diseno En Ingenieria, 2021
This study proposes a methodology for the calibration of combined sewer overflow (CSO), incorpora... more This study proposes a methodology for the calibration of combined sewer overflow (CSO), incorporating the results of the three-dimensional ANSYS CFX model in the SWMM one-dimensional model. The procedure consists of constructing calibration curves in ANSYS CFX that relate the input flow to the CSO with the overflow, to then incorporate them into the SWMM model. The results obtained show that the behavior of the flow over the crest of the overflow weir varies in space and time. Therefore, the flow of entry to the CSO and the flow of excesses maintain a non-linear relationship, contrary to the results obtained in the one-dimensional model. However, the uncertainty associated with the idealization of flow methodologies in one dimension is reduced under the SWMM model with kinematic wave conditions and simulating CSO from curves obtained in ANSYS CFX. The result obtained facilitates the calibration of combined sewer networks for permanent or non-permanent flow conditions, by means of th...
Journal of Physics: Conference Series, 2021
The historical investigation of stresses in a clay material is essential to predict the compressi... more The historical investigation of stresses in a clay material is essential to predict the compressible behaviour of a soil layer that, in most cases functions as a foundation support of superstructures. Because the stresses underwent in the geological past provide useful information to understand the response of the soil today. There are numerous methods for the interpretation of the preconsolidation stress, defined by the standard unidimensional consolidation test. The concept of preconsolidation stress is extremely useful in the geotechnical field to analyze and estimate settlements in a clay deposit, in addition to normalizing other parameters for comparative purposes. Through mineralogical analysis and consolidation tests based on different models for the estimation of the vertical consolidation coefficient, preconsolidation stress is evaluated by applying disparate constitutive methods. In order to observe the dispersion of results for a particular soil. A new technique is propos...
Journal of Physics: Conference Series
The reciprocal contribution that physics has had in engineering and engineering in physics is und... more The reciprocal contribution that physics has had in engineering and engineering in physics is undeniable. The First International Conference on Physical Problems of Engineering (1st ICPPE) tries to highlight this symbiotic relationship between both sciences through different presentations that reflected their results in separate articles that will be published in the Journal of Physics: Conference Series. List of Organizing Committee, National Scientific Committee, International Scientific Committee, Sponsor, Partners, Images are available in this pdf.
Journal of Physics: Conference Series
This paper evaluated the physical-mechanical characteristics of two asphalt mixtures. One mix wit... more This paper evaluated the physical-mechanical characteristics of two asphalt mixtures. One mix with conventional asphalt and the other with asphalt modified with recycled rubber grain. For this purpose, the asphalt mix designs were made by means of the Marshall methodology. Subsequently, asphalt mixtures were manufactured to analyze the action of monotonic loads (indirect tensile strength) and dynamic loads (resilient modulus). Previously, each type of asphalt mix was subjected to short- and long-term aging conditions, following Aastho guidelines. It is concluded that the incorporation of recycled rubber grain makes the changes in mechanical properties with aging not very noticeable in relation to mixtures without this material.
Journal of Physics: Conference Series
Journal of Physics: Conference Series
Journal of Physics: Conference Series
Diffraction, scanning electron microscope and helium porosimetry techniques have been shown to be... more Diffraction, scanning electron microscope and helium porosimetry techniques have been shown to be suitable for obtaining physical and mineralogical properties in soil samples. The X-ray fluorescence spectroscopy allows obtaining the elemental composition of the sample, while the X-ray diffraction technique permits obtaining a qualitative and quantitative composition of the soil minerals. On the other hand, scanning electron microscope shows the microstructure of the soil and the helium porosimetry measures the pore size, volume, distribution, density and other porosity-related characteristics of the material. This document presents the characterisation of three different clayey soils by an experimental plan that included mineralogical, microstructural and porosimetric tests. The soils used were bentonite, kaolin and a natural clay retrieved near to Bogotá city, Colombia. Results obtained from this study allow providing a better understanding of soil behaviour, which traditional mech...
Journal of Physics: Conference Series
Revista ingeniería de construcción
Archives of Civil Engineering
Iron production’s waste materials include significant quantities of blast furnace slag (BFS) whic... more Iron production’s waste materials include significant quantities of blast furnace slag (BFS) which could potentially be used as a substitute for natural aggregates in hot mix asphalt (HMA) used in highway projects. Although many of properties of slag are interesting, its porosity and absorption rate would lead to greater consumption of asphalt. For this study, a Portland cement (PC) paste was used to reduce the porosity of a BFS. This PC treated BFS (called BFS-C) was then used in an HMA to replace the coarse fraction of a natural aggregate. Marshall, Indirect Tensile Strength (ITS), resilient modulus and Cantabro tests were then carried out on different HMA mixtures that included BFS-C. Using BFS-C, HMA’s resistance under monotonic loading, stiffness under cyclic loading, and resistance to moisture damage increased remarkably. In addition, the Cantabro abrasion resistance of BFS-C improved was better than that of the HMA mixture produced with untreated BFS.
Journal of Physics: Conference Series
DYNA, 2017
Algunas estructuras de contención de acuerdo con su diseño geotécnico y plan de construcción pred... more Algunas estructuras de contención de acuerdo con su diseño geotécnico y plan de construcción predefinido. Por supuesto, esto no extrapolable a todos los sitios de análisis, sin embargo, en Brasilia, donde predominan los suelos residuales y lateralizados, se obtienen las mejores resistencias mecánicas en los estratos porosos durante la estación seca. Esto significa que es controlada por la succión del suelo, es decir, el comportamiento del material presenta una dependencia de la respuesta no saturada del medio. En términos numéricos, para predecir el comportamiento suelo-estructura fue necesario incluir la interacción atmósfera-suelo en una herramienta computacional, utilizando un modelo hipoplástico. El trabajo detalla de esta manera las simulaciones numéricas de una estructura de retención fundada en el suelo tropical de Brasilia. La estructura fue monitoreada en términos de desplazamiento, a lo largo de las estaciones locales secas y húmedas, y fue simulada por una ley constituti...
E3S Web of Conferences, 2016
The main objective of the current research is to analyze through the use of elemental simulations... more The main objective of the current research is to analyze through the use of elemental simulations, unsaturated tests executed on soils with metastable characteristics (Brasilia porous clay), which due to high porosity and kind of cementation, presents a structure temporally unstable when undergoing an increasing of wetting and/or variation of the stress state, resulting in the most of cases in a significant change of volume denominated collapse. The tests were done in the Geotechnical Lab from the University of Brasilia and Geological Institute from Charles University in Prague, considering characterization tests for the identification of the basic properties, tests for determination of the characteristic curve, consolidation, direct shear and triaxial, in both conditions saturated and unsaturated, as well as the porosimetry test, for the study of the mechanical behavior. The tests were reproduced using numerical modeling to elemental level, involving a hypoplastic model for the unsaturated soils behavior.
International Journal of GEOMATE, 2018
Journal of Physics: Conference Series
Fatigue cracking by loading is one of the main mechanisms of damage to asphalt mixtures in servic... more Fatigue cracking by loading is one of the main mechanisms of damage to asphalt mixtures in service. Several studies worldwide have been conducted to try to understand the response that hot-mix asphalt undergo under this mechanism of damage. Despite the above, the fatigue phenomenon in asphalt mixtures is still not fully understood. The current research hypothesizes that the response under repeated loading of asphalt mixtures in fatigue tests can be more clearly understood through the one obtained under monotonic loading. For this reason, this study presents the results of the first phase of the research in which beams of asphalt mixtures were subjected to flexion using monotonic loads. The above, to correlate the evaluated properties with those obtained in a second phase where the response of the beams under repeated load (fatigue) will be measured. Beams made of two hot-mix asphalt mixes, two asphalt contents, and two different thicknesses were subjected to flexural strength tests....
Journal of Physics: Conference Series
The Pinhole test is an empirical probe with a qualitative classification foundation that identifi... more The Pinhole test is an empirical probe with a qualitative classification foundation that identifies fine-grained soils with dispersive potential using hydraulic heads. However, the original technique was designed to identify dispersive clays. In some cases, it is misused as a quantitative test for measuring subsurface erosion rates. This paper presents a physicochemical modification to the exact test, based on adding a dispersant in the sample compaction water. For the quantitative evaluation of the susceptibility of the soil to generate internal tubification or piping, the effects of hydraulic load, flow, and orifice diameter before and after the execution of the test are explored—both for the samples treated with deflocculant and for those compacted using distilled water. Additionally, to complete the identification results, physical and chemical approaches were applied as methods of comparison. The results obtained from the altered soils indicate a significant increase in the cla...
Th is paper presents a probabilistic analysis of two mix designs of High Performance Concrete as ... more Th is paper presents a probabilistic analysis of two mix designs of High Performance Concrete as a first step in obtaining a statistical model that achieves expressing its results in a more useful way, allowing to determine the potential strength and quality of concrete. The analysis of results of concrete compressive strength test was conducted by using statistical software called SPSS, which by means of different statistical variables, permitted to explore as to whether the frequency distribution corresponded that normally seen in conventional concrete. The results show the distribution or tendency of resistance of each of the designs, and the variation in specific resistance; they also rigorously reflect the importance of knowing both the properties of the concrete mix as well as the procedure for the methods of trial.
2021 Congreso Internacional de Innovación y Tendencias en Ingeniería (CONIITI)
Journal of Physics: Conference Series, 2021
The study of the physicochemical activity of clays is essential to understand the mechanical-hydr... more The study of the physicochemical activity of clays is essential to understand the mechanical-hydraulic behavior. The experimental analysis of the expansivity of soils is linked to the content of clay minerals present in the tactoid tissue, which affect is directly in proportion to the volumetric change that soil may undergo. This work aims to carry out an analysis to understand the expansive behavior of the proposed clay materials, using different techniques, both conventional and modern. For this purpose, the bentonite clay used with a majority montmorillonite component was analyzed through petrographic tests and images analysis. The samples with a base material and different contents of montmorillonite were prepared. Montmorillonite is a clay mineral with a very high swelling potential because even when it was used in low proportions on a sandy base material, the influence of the material is strong and the expansivity remained high.
Revista Internacional De Metodos Numericos Para Calculo Y Diseno En Ingenieria, 2021
This study proposes a methodology for the calibration of combined sewer overflow (CSO), incorpora... more This study proposes a methodology for the calibration of combined sewer overflow (CSO), incorporating the results of the three-dimensional ANSYS CFX model in the SWMM one-dimensional model. The procedure consists of constructing calibration curves in ANSYS CFX that relate the input flow to the CSO with the overflow, to then incorporate them into the SWMM model. The results obtained show that the behavior of the flow over the crest of the overflow weir varies in space and time. Therefore, the flow of entry to the CSO and the flow of excesses maintain a non-linear relationship, contrary to the results obtained in the one-dimensional model. However, the uncertainty associated with the idealization of flow methodologies in one dimension is reduced under the SWMM model with kinematic wave conditions and simulating CSO from curves obtained in ANSYS CFX. The result obtained facilitates the calibration of combined sewer networks for permanent or non-permanent flow conditions, by means of th...
Journal of Physics: Conference Series, 2021
The historical investigation of stresses in a clay material is essential to predict the compressi... more The historical investigation of stresses in a clay material is essential to predict the compressible behaviour of a soil layer that, in most cases functions as a foundation support of superstructures. Because the stresses underwent in the geological past provide useful information to understand the response of the soil today. There are numerous methods for the interpretation of the preconsolidation stress, defined by the standard unidimensional consolidation test. The concept of preconsolidation stress is extremely useful in the geotechnical field to analyze and estimate settlements in a clay deposit, in addition to normalizing other parameters for comparative purposes. Through mineralogical analysis and consolidation tests based on different models for the estimation of the vertical consolidation coefficient, preconsolidation stress is evaluated by applying disparate constitutive methods. In order to observe the dispersion of results for a particular soil. A new technique is propos...
Journal of Physics: Conference Series
The reciprocal contribution that physics has had in engineering and engineering in physics is und... more The reciprocal contribution that physics has had in engineering and engineering in physics is undeniable. The First International Conference on Physical Problems of Engineering (1st ICPPE) tries to highlight this symbiotic relationship between both sciences through different presentations that reflected their results in separate articles that will be published in the Journal of Physics: Conference Series. List of Organizing Committee, National Scientific Committee, International Scientific Committee, Sponsor, Partners, Images are available in this pdf.
Journal of Physics: Conference Series
This paper evaluated the physical-mechanical characteristics of two asphalt mixtures. One mix wit... more This paper evaluated the physical-mechanical characteristics of two asphalt mixtures. One mix with conventional asphalt and the other with asphalt modified with recycled rubber grain. For this purpose, the asphalt mix designs were made by means of the Marshall methodology. Subsequently, asphalt mixtures were manufactured to analyze the action of monotonic loads (indirect tensile strength) and dynamic loads (resilient modulus). Previously, each type of asphalt mix was subjected to short- and long-term aging conditions, following Aastho guidelines. It is concluded that the incorporation of recycled rubber grain makes the changes in mechanical properties with aging not very noticeable in relation to mixtures without this material.
Journal of Physics: Conference Series
Journal of Physics: Conference Series
Journal of Physics: Conference Series
Diffraction, scanning electron microscope and helium porosimetry techniques have been shown to be... more Diffraction, scanning electron microscope and helium porosimetry techniques have been shown to be suitable for obtaining physical and mineralogical properties in soil samples. The X-ray fluorescence spectroscopy allows obtaining the elemental composition of the sample, while the X-ray diffraction technique permits obtaining a qualitative and quantitative composition of the soil minerals. On the other hand, scanning electron microscope shows the microstructure of the soil and the helium porosimetry measures the pore size, volume, distribution, density and other porosity-related characteristics of the material. This document presents the characterisation of three different clayey soils by an experimental plan that included mineralogical, microstructural and porosimetric tests. The soils used were bentonite, kaolin and a natural clay retrieved near to Bogotá city, Colombia. Results obtained from this study allow providing a better understanding of soil behaviour, which traditional mech...
Journal of Physics: Conference Series
Revista ingeniería de construcción
Archives of Civil Engineering
Iron production’s waste materials include significant quantities of blast furnace slag (BFS) whic... more Iron production’s waste materials include significant quantities of blast furnace slag (BFS) which could potentially be used as a substitute for natural aggregates in hot mix asphalt (HMA) used in highway projects. Although many of properties of slag are interesting, its porosity and absorption rate would lead to greater consumption of asphalt. For this study, a Portland cement (PC) paste was used to reduce the porosity of a BFS. This PC treated BFS (called BFS-C) was then used in an HMA to replace the coarse fraction of a natural aggregate. Marshall, Indirect Tensile Strength (ITS), resilient modulus and Cantabro tests were then carried out on different HMA mixtures that included BFS-C. Using BFS-C, HMA’s resistance under monotonic loading, stiffness under cyclic loading, and resistance to moisture damage increased remarkably. In addition, the Cantabro abrasion resistance of BFS-C improved was better than that of the HMA mixture produced with untreated BFS.
Journal of Physics: Conference Series
This paper addresses numerical simulations of K0 triaxial tests performed using a single element ... more This paper addresses numerical simulations of K0 triaxial tests performed using a single element program. The methodology was based on construction of numerical models with three different constitutive models in order to represent the soil behaviour during stress path states. The constitutive models used were (i) the Mohr-Coulomb, (ii) the Cam-Clay, and (iii) a hypoplastic model. The material used was a collapsible porous Brazilian clay. The values obtained were compared and calibrated with experimental data. Results show that it is possible to assess soil behaviour via a single element program and that triaxial K0 stress path tests can be simulated with numerical methods. Results show that it is possible to replicate and calibrate soil behaviour under zero lateral displacement using computational tools.