Orlando Rincón-Arango

Pontificia Universidad Javeriana

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Manuel Ocampo-Terreros

Pontificia Universidad Javeriana

Miguel Castilla-Barbosa

Pontificia Universidad Javeriana

Manuel Ocampo

Universidad de Los Andes

Zuleny Cuarán-Cuarán

Pontificia Universidad Javeriana

Yezid A. Alvarado

Pontificia Universidad Javeriana

Victor J. Sosa‐Sosa

Center for Research and Advanced Studies of the National Polytechnic Institute

Carlos F. URAZAN-BONELLS

Abdul Shakoor

Abdul Wali Khan University Mardan

Hermes A. Vacca

Pontificia Universidad Javeriana

Mayerling Sanabria Buitrago

University of La Salle

Cooperative Institutions

Pontificia Universidad Javeriana

Universidad de Los Andes

University of La Salle

Universidad Autónoma del Estado de Hidalgo

Universitat Politècnica de València

Center for Research and Advanced Studies of the National Polytechnic Institute

Autonomous University of Tamaulipas

Universidad Carlos III de Madrid

Instituto Politécnico Nacional

Tecnológico Nacional de México

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Flexural fatigue performance of a high-thixotropy UHPC

International Journal of Pavement Engineering (2023)

Anny Medicis Hermes A. Vacca Yezid A. Alvarado Orlando Rincón-Arango Daniel Ruíz

ABSTRACTThis research aims to perform a comparison of the mechanical response and the fatigue behaviour of two Ultra-High Performance Concrete (UHPC) mixtures subjected to bending loads: a regular UHPC and a high-thixotropy UHPC. The same materials were used in both mixtures and the only difference was the proportions of water and additive. Rheological tests were performed to validate the thixotropy of mixtures in fresh-state. Additionally, image analysis was applied to get fibre distribution and orientation from beam-cut slices. Thus, the Image pixel complete colour structure (RGB) was analysed to avoid greyscale transformations because of its loss of information. Finally, three-point bending tests were conducted over pre-cracked beams to establish a fatigue equation for the mixtures. Experimental results showed that high-thixotropy UHPC has mechanical properties comparable to regular UHPC.KEYWORDS: UHPCflexural fatiguerheologythixotropy AcknowledgmentsThe research was developed by the Pontificia Universidad Javeriana and Cementos Argos S.A, that contributed with laboratory resources and time of professors and researchers. Also the authors of this work acknowledge and thank the support of the Civil Engineering Laboratory of Pontificia Universidad Javeriana and all technical staff, where the tests were carried out.Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was funded by Fondo Nacional de Financiamiento para la Ciencia, la Tecnología y la Innovación Francisco José de Caldas de MinCiencias, Republic of Colombia: Project Code 120380863881 Id: 63881, Rehabilitación de pavimentos con sobrecarpetas de concretos de Ultra Alto desempeño reforzado con fibras de acero UHPFRC. This research was developed by Pontificia Universidad Javeriana, and Argos company which contributed with laboratory resources and time of professors and researchers.

Thixotropy

10.1080/10298436.2023.2282004

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Citations (4)

Investigating the reliability of H/V spectral ratio and image entropy for quantifying the degree of disintegration of weak rocks

Engineering Geology (2016)

Orlando Rincón-Arango Abdul Shakoor Manuel Ocampo

Microtremor

10.1016/j.enggeo.2016.04.020

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Citations (30)

Weak rocks disintegration patterns recognition through image analysis

Orlando Rincón-Arango Manuel Ocampo

This paper presents results about image analysis application for identification and classification of disintegration patterns upon weak rocks, clay-bearing rocks and Intermediate Geomaterials IGMs. The research was conducted in order to obtain a reliable method for field and laboratory because upon these materials, it is quite difficult to acquire unaltered samples due to the quick disintegration after the materials are exposed to environmental conditions. Thus, the application of image analysis and color changes produced by disintegration advance has shown reliable results to be used as an alternative method to replace the traditional human eye based classification charts. Several images were taken upon different disintegration states and environmental conditions and were correlated with changes in color channels, using colorimetric indices and statistical image descriptors. As a result, a disintegration classification method based on Image entropy and color changes was stated, the findings were validated and compared with results from traditional methods using both natural and artificial samples with controlled disintegration levels, in addition, Hyperspectral images, were used as well.

Statistical Analysis

10.23919/mva.2017.7986870

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Citations (2)

A Review of Sand Aging: Mechanisms and Impacts

Geotechnical and Geological Engineering (2024)

Miguel Castilla-Barbosa Manuel Ocampo-Terreros Orlando Rincón-Arango

10.1007/s10706-024-02923-0

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Micro-scale study about interfacial interaction of emulsion-aggregate system for cold mix asphalt

Zuleny Cuarán-Cuarán Orlando Rincón-Arango Manuel Ocampo-Terreros

The performance difference between cold mix asphalt and hot mix asphalt, generally it is associated with the interaction of emulsion-aggregate system during the mixing stage. Currently, performance indexes for the asphalt emulsion-aggregate system in terms of surface charge and surface energy to understand the compatibility between the components are unknown. In this study, the interaction of asphalt emulsion-aggregate systems was evaluated in micro scale using the Zeta potential and surface free energy (SFE) techniques for three asphalt emulsions and three sedimentary aggregates. The results showed that the three aggregates presented negative Zeta potentials. Additionally, it was observed reductions of the aggregates Zeta potentials respect to the asphalt emulsions pH value. Residual asphalts and aggregates presented low and high SFE values, respectively. Finally, compatibility of the emulsion-aggregate system was supported by high values of Zeta potential and SFE.

Zeta potential

Surface charge

10.1109/coniiti57704.2022.9953715

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Evaluation of the electrochemical interaction in the asphalt emulsion-aggregate system of cold mix asphalt through zeta potential and surface free energy analysis

International Journal of Pavement Engineering (2024)

Zuleny Cuarán-Cuarán Miguel Castilla-Barbosa Orlando Rincón-Arango Manuel Ocampo-Terreros

The interaction in the emulsion-aggregate system is well known and influences the Cold Mix Asphalt (CMA) performance. However, the electrochemical interaction indexes for the emulsion-aggregate systems are still not well understood. Therefore, the present investigation focussed on evaluating the electrochemical interaction in the Asphalt Emulsion-Aggregate system (AEA-S) of Cold Mix Asphalt (CMA). Zeta Potential (ZP), X-ray diffraction (XRD), and Surface Free Energy (SFE) analysis were carried out in three slow-setting cationic asphalt emulsions and three common Colombian aggregates (alluvial and quarried) to determine the electrical potential and interaction in the emulsion-aggregate system. Zeta Potential analysis shows both dependence on the chemical compounds of the aggregates and variation in pH conditions. Moreover, Zeta Potential shows negative values for all three aggregates in the entire pH range variation and decreases with asphalt emulsions pH associated with SiO2/Al2O3 ratio. Through chemical identification and electrokinetic forces is feasible to conclude that high Zeta Potential (ZP) and Surface Free Energy (SFE) values improve the electrochemical ad of the asphalt emulsion-aggregate system (AEA-S), demonstrating that high polarity is an essential factor in Cold Mix Asphalts (CMA).

Zeta potential

10.1080/10298436.2024.2361837

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Uso de equipos de teledetección para analizar condiciones de movilidad en asentamientos carenciados

ESPACIOS (2020)

Carlos F. URAZAN-BONELLS María Alejandra Caicedo Londoño Orlando Rincón-Arango Carlos F. AGUDELO-RODRIGUEZ Mayerling Sanabria Buitrago

Se realizaron pruebas piloto con diversos equipos de teledetección para establecer la condición de varios aspectos en infraestructura y transporte en un sector urbano de origen informal. El uso de: imágenes satelitales, fotografías, videos, drones, radar de velocidad, y equipos de GPS para el reconocimiento de la condición del terreno y del tránsito; agiliza la obtención de información técnica para concluir la necesidad o no de estudios de mayor detalle, en pro de un proceso de potencial legalización urbanística.

10.48082/espacios-a20v41n45p15

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Citations (1)

Building IoT-enabled applications

Computer Science and Software Engineering (2015)

Victor J. Sosa‐Sosa Orlando Rincón-Arango C. Orozco-Henao

The world is becoming so interconnected that sensors and measuring devices are becoming widely popular to retrieve data for personal uses giving users the real-time information they need to react in the right way at the right time, it's estimated that by 2020 there will be up to 50 billion IoT devices connected. Moreover, with the advent of Mobile devices, the usability of such information is as relatively simple as just notifying the user through his mobile device.

Source

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Electrokinetic Forces as an Electrical Measure of Chemical Aging Potential in Granular Materials

ChemEngineering (2023)

Miguel Castilla-Barbosa Orlando Rincón-Arango Manuel Ocampo-Terreros

The zeta potential of soils is an electric potential in the double-layer interface and is a physical property exhibited by any particle related to electrochemical attractive forces. On the other hand, the chemical aging phenomenon is seen as the chief mechanism of the aging of sands due to the dissolution and precipitation of minerals, resulting in the development of the cementation of particles in granular mediums. The present investigation focuses on determining whether granular materials can generate cementation due to electrokinetic forces, and if the zeta potential could be related as a measure of the potential of chemical aging. X-ray fluorescence and diffraction tests were performed to characterize four representative fractions of one kind of sand, and zeta potential studies were carried out to determine the electrical potential on the mineral surfaces of each one. Zeta potential analysis showed both dependence on the mineralogical content and the variation in the pH of the colloidal solution fluid because the increase in OH- ion concentrations increases the thickness of the diffuse double layer and the electrokinetic forces of attraction. Moreover, the zeta potential showed an increase in the thickness of the diffuse double layer, due to the electrokinetic forces, which can be associated with the development of cohesive forces with a dependence on the mineralogy of sands.

Zeta potential

Cementation (geology)

Streaming current

Particle (ecology)

10.3390/chemengineering7050091

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Citations (2)

Clay-bearing rocks slaking characterization using artificial vision

CRC Press eBooks (2014)

Orlando Rincón-Arango L. T. Florez Manuel Ocampo

Characterization

10.1201/b17395-267

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Citations (1)