Geotecnia Ambiental – GIGAhttps://repositorio.ufps.edu.co/handle/ufps/642024-03-29T15:17:42Z2024-03-29T15:17:42ZGestión pública en una ciudad fronteriza colombiana: La mirada de sus habitantesAMBOA SUAREZ, AUDIN ALOISOHernández Álvarez, Cesar AugustoRamirez Leal, Pastorhttps://repositorio.ufps.edu.co/handle/ufps/65792022-11-22T08:00:26Z2021-08-01T00:00:00ZGestión pública en una ciudad fronteriza colombiana: La mirada de sus habitantes; Public management in a Colombian border city: The gaze of its inhabitants
AMBOA SUAREZ, AUDIN ALOISO; Hernández Álvarez, Cesar Augusto; Ramirez Leal, Pastor
La gestión pública eficiente busca generar actuaciones transparentes que logren satisfacer
necesidades básicas de los habitantes. El objetivo del artículo es identificar las percepciones de habitantes de
la ciudad fronteriza de Cúcuta, en Colombia, sobre la gestión de sus gobernantes en aspectos relacionados
con educación, empleo, salud, seguridad y vivienda. El componente metodológico estuvo determinado
por el paradigma cuantitativo, con diseño descriptivo, no experimental, de corte transversal. Se aplicó un
cuestionario de 16 ítems a 2.284 participantes de las diez comunas de la ciudad. Los resultados muestran que
63,5% de los encuestados manifestó que la ciudad ha empeorado en el último año, en contraste con 27,5%
que considera que ha mejorado tras la aplicación de las políticas de gobierno, mientras que 9% no respondió.
Se concluye, que la insatisfacción de la mayoría de los habitantes con la gestión del gobierno municipal se
relaciona, principalmente, con el alto porcentaje del trabajo informal, la falta de oportunidades para empleo
formal y los deficientes sistemas de salud y educación. Problemas que no surgieron con la pandemia, sino
que se han configurado desde años anteriores, ante la poca ayuda que ha brindado el gobierno municipal para
mitigar los problemas sociales de la región.; Efficient public management seeks to generate transparent actions that meet the basic needs of
the inhabitants. The objective of the article is to identify the perceptions of inhabitants of the border city
of Cúcuta, in Colombia, on the management of their rulers in aspects related to education, employment,
health, security and housing. The methodological component was determined by the quantitative paradigm,
with a descriptive, non-experimental, cross-sectional design. A 16-item questionnaire was applied to 2,284
participants from the ten municipalities of the city. The results show that 63.5% of those surveyed stated
that the city has worsened in the last year, in contrast to 27.5% who consider that it has improved after the
application of government policies, while 9% did not respond. It is concluded that the dissatisfaction of the
majority of the inhabitants with the management of the municipal government is mainly related to the high
percentage of informal work, the lack of opportunities for formal employment and the deficient health and
education systems. Problems that did not arise with the pandemic, but have been configured in previous
years, given the little help that the municipal government has provided to mitigate social problems in the
region.
2021-08-01T00:00:00ZEffects of biodeterioration on the mechanical properties of concreteMarquez-Peñaranda, J. F.Sanchez-Silva, M.Husserl, J.Bastidas-Arteaga, E.https://repositorio.ufps.edu.co/handle/ufps/7142022-05-23T15:55:01Z2015-12-29T00:00:00ZEffects of biodeterioration on the mechanical properties of concrete
Marquez-Peñaranda, J. F.; Sanchez-Silva, M.; Husserl, J.; Bastidas-Arteaga, E.
Concrete biodeterioration in sewers and structures subjected to environments rich in hydrogen sulfide has been related to the activity of sulfur oxidizing bacteria (SOB). In previous studies, the effect of the activity of SOB on concrete structures has been linked mainly to weight loss. In our work we have investigated, in addition to the weight loss, the variations in porosity and compressive strength. The main objective of this paper is to explore, under controlled conditions, the effect of biodegradation of non-submerged samples, on both the physical properties and the mechanical performance. Towards this aim, cement mortar samples inoculated with pure cultures of Acidithiobacillus thiooxidans, Halothiobacillus neapolitanus, and a consortium containing both strains, were exposed to an H2S-rich environment. Changes in physical properties, including weight and porosity, and compressive strength were measured over 300 days. The results showed that the greatest reduction of weight and compressive strength was observed in samples inoculated with the consortium (7 and 52 %, respectively); while the largest variation in porosity was observed in samples inoculated with A. thiooxidans (27 %). These results were used to obtain relationships between the amount of sulfur available over time with specific physical and mechanical properties; i.e., compressive strength, porosity, weight loss, and physical appearance.
2015-12-29T00:00:00ZEvaluación del desgaste por abrasión de una mezcla drenante modificada con residuo de llanta triturada (GCR)Yung Vargas, Yee WanCordoba Maquilon, Jorge EliecerRondón-Quintana, Hugo Alexanderhttps://repositorio.ufps.edu.co/handle/ufps/7132022-05-23T15:55:00Z2017-02-01T00:00:00ZEvaluación del desgaste por abrasión de una mezcla drenante modificada con residuo de llanta triturada (GCR); Evaluation of abrasion of a modified drainage mixture with rubber waste crushed (GCR)
Yung Vargas, Yee Wan; Cordoba Maquilon, Jorge Eliecer; Rondón-Quintana, Hugo Alexander
Contexto: Las mezclas asfálticas drenantes son definidas como aquellas cuyos vacíos con aire oscilan entre 20% y 25%, y emplean como ligante, un asfalto modificado con algún polímero principalmente elastomérico. A diferencia de otros estudios reportados sobre el tema, se evaluó el efecto de la temperatura de mezcla entre el asfalto modificado con GCR y el material pétreo (160 ºC y 170 ºC), y la variación de las temperaturas de compactación para cada una de ellas (110 ºC, 130 ºC, 150 ºC) y (150 ºC, 160 ºC 170 ºC) respectivamente.
Método: El presente estudio evaluó en laboratorio, la resistencia al desgaste por abrasión (ensayo Cántabro) y la rigidez bajo carga monotónica (ensayo Marshall) y cíclica (módulo resiliente) que experimentó una mezcla asfáltica drenante MD fabricada con asfalto modificado con grano de caucho reciclado de llanta (GCR) por vía húmeda (se modifica el asfalto con el GCR a alta temperatura). Como asfalto base para la fabricación de las mezclas se utilizó cemento asfáltico CA 60-70 (PG 64-22).
Resultados: se reporta un incremento notable en la resistencia al desgaste por abrasión, a la resistencia bajo carga monotónica y la rigidez bajo carga cíclica de la MD cuando se modifica con GCR.
Conclusiones: Como conclusión general se resalta la influencia que tienen las temperaturas de mezcla entre el asfalto y el GCR, así como la de compactación (asfalto modificado y agregado) sobre el comportamiento de la MD modificada con GCR.; Context: Porous asphalt mixtures are defined as an asphalt concrete with air voids content of around 20% and 25%, and the typical binder is a modified asphalt with some elastomeric polymer. Unlike other studies reported on the subject: i) The effect of mixing temperature between asphalt modified with GCR and stone materials (160 °C and 170 °C) was evaluated, ii) as the variation of compaction temperatures for each of (110 ºC, 130 ºC, 150 ºC) and (150 ºC, 160 ºC, 170 ºC), respectively.
Method: This study measured in laboratory, the resistance to abrasion (Cantabria trial) and the stiffness under monotonic (Marshall test) and cyclical (resilient modulus) loading of a porous asphalt mixture MD. Asphalt cement CA 60-70 (PG 64-22) was used as binder. This binder was modified with recycling tyre rubber (GCR) by wet way (The GCR and binder are completely mixed to form asphalt rubber).
Results: a significant increase in resistance to abrasion, resistance under monotonic loading and stiffness under cyclic loading of the MD is reported when this mixture is modified with GCR.
Conclusion: The results showed that there is a highlighted influence of mix temperature (between asphalt and GCR) and compaction temperature (modified asphalt and aggregate) on the behavior of the MD modified with GCR.
2017-02-01T00:00:00ZTesting stabilization of high-plasticity clays used in sloping terrain by adding sodium silicateFLOREZ-GONGORA, CARLOSGarzón-Peña, A TMolina-Giraldo, R Dhttps://repositorio.ufps.edu.co/handle/ufps/7122022-05-23T15:54:59Z2020-08-05T00:00:00ZTesting stabilization of high-plasticity clays used in sloping terrain by adding sodium silicate
FLOREZ-GONGORA, CARLOS; Garzón-Peña, A T; Molina-Giraldo, R D
High-plasticity clays can be stabilized by the addition of a small percentage of sodium silicate. Sixteen mixtures of 4000 g with different concentrations of sodium silicate at difference percentage were designed, to which were carried out physical, mechanical and chemical characterization tests that allowed to analyze the behavior at intervals of time. Physical, mechanical and chemical properties of the soil were evaluated. Using stabilization with sodium silicate in high plasticity clays, changes in the physical, mechanical, and chemical parameters of the soil were achieved. Having satisfactory results with 3% saturation, optimal concentration, at time intervals of 2 days and 1 month; Then as time passes the soil tries to return to its initial properties, which establishes that the concentration of the Silicate and its effect on the physical and mechanical properties of the soil should be checked over a longer time interval. Studying the physical, mechanical, and chemical parameters of high plasticity clays by adding multiples mixtures of sodium silicate contributes to the understanding of the soil behavior on the pressure condition.
2020-08-05T00:00:00Z