6 research outputs found
Una visi贸n de Ciudad sostenible desde el modelo de gesti贸n de los residuos de construcci贸n y demolici贸n (Rcd) caso De estudio: Barranquilla
ABSTRACT
Context: The large amount of Construction and Demolition Waste (RCD) that is generated has become a worldwide problem. For this reason, the legislation in Colombia seeks to guide its proper management and promote its use.
Methodology: This research proposes an alternative for the elaboration of the comprehensive management plan based on an analysis of the national and local legislation of the cities that are at the forefront in the management of the RCDs in Colombia. Based on this analysis, the conditions and characteristics of an intermediate city such as Barranquilla were studied and analyzed to propose an integral alternative for the management of this waste (management and treatment).
Results: The aspects of prevention, storage, collection, transport, use and final disposition to be taken into account within the comprehensive management plan of RCD most suitable for the city of Barranquilla were identified according to their conditions and a treatment plant scheme was proposed that considered more appropriate in its management.
Conclusions: Barranquilla requires a quick adjustment to its RCD management model, given its high development rate during the last years. It was recognized for this city that separation at source and use are fundamental in the model required to achieve a sustainable management process. In addition, weaknesses in the current management system were identified, associated with the use of a linear economy model, therefore, a management model based on the principles of circular economy is proposed.RESUMEN
Contexto: La gran cantidad de Residuos de Construcci贸n y Demolici贸n (RCD) que se genera, se ha convertido en un problema a nivel Mundial. Por esta raz贸n, la legislaci贸n en Colombia busca orientar su adecuada gesti贸n y promover el aprovechamiento de estos.
Metodolog铆a: En esta investigaci贸n se plantea una alternativa para la elaboraci贸n del plan de gesti贸n integral basada en un an谩lisis de la legislaci贸n nacional y local de las ciudades que est谩n a la vanguardia en el manejo de los RCD en Colombia. Basado en este an谩lisis se estudiaron y analizaron las condiciones y caracter铆sticas de una ciudad intermedia como lo es Barranquilla para plantear una alternativa integral para el manejo de estos residuos (gesti贸n y tratamiento).
Resultados: Se identificaron acorde con sus condiciones los aspectos de prevenci贸n, almacenamiento, recolecci贸n, transporte, aprovechamiento y disposici贸n final a tener en cuenta dentro del plan de gesti贸n integral de RCD m谩s adecuado para la ciudad de Barranquilla y se plante贸 un esquema planta de tratamiento que se considera m谩s adecuado en su manejo.
Conclusiones: Barranquilla requiere un ajuste r谩pido a su modelo de gesti贸n de RCD, dada su alta tasa de desarrollo durante los 煤ltimos a帽os. Se reconoci贸 para esta ciudad que la separaci贸n en la fuente y el uso son fundamentales en el modelo requerido para lograr un proceso de gesti贸n sostenible. Adem谩s, se identificaron debilidades en el sistema de gesti贸n actual, asociadas con el uso de un modelo de econom铆a lineal, por lo tanto, se propone un modelo de gesti贸n basado en los principios de la econom铆a circular
Residuos de construcci贸n y demolici贸n (RCD), una perspectiva de aprovechamiento para la ciudad de barranquilla desde su modelo de gesti贸n
In recent years, there has been a significant increase in constructionprojects in the city of Barranquilla, leading to contamination in soilsand water sources due to the inadequate generation and disposal ofConstruction and Demolition Waste (CDW). It is clear that this is not alocal problem alone but that it involves trends present at a global level,which have led several countries to design measures for an adequatemanagement of waste generated on building sites. Some examples ofthis adequate management are: reincorporation of CDW in constructionprocesses, reuse or use of CDW as raw materials, processing of CDWto be converted into mineral aggregates for concrete and asphalt andthe use of CDW as mineral fillers. In this work we present results of astudy carried out in 75 construction sites located at different areas ofthe city of Barranquilla. We have carried out a detailed survey to assessthe management, treatment and final disposal procedures, thus leadingto a clear identification of relevant issues to deal with in this field, aswell as improvements in the knowledge in the local legislation for themanagement of CDW. Based on the results obtained here, we have identifiedthat the CDW management practices that the construction guildis currently carrying out are not adequate to solve these problems andthat a more practical and long term solution needs to include a proposalto improve the management model (involving use and transformation)and its posterior implementation in the city of Barranquilla.En los 煤ltimos a帽os ha crecido significativamente la construcci贸n enla ciudad de Barranquilla, lo cual ha generado que los Residuos deConstrucci贸n y Demolici贸n (RCD) se hayan convertido en un problemaambiental, puesto que debido a su cantidad y disposici贸n inadecuada, sehan configurado en focos de contaminaci贸n de suelos y aguas superficiales.Este problema no es solo local, sino mundial, por lo que diferentespa铆ses han tomado medidas para una adecuada gesti贸n integral de losresiduos generados en obra. Algunos de los ejemplos de esta adecuadagesti贸n son: reincorporaci贸n de RCD en procesos constructivos, re煤so oaprovechamiento de RCD como materias primas, procesamiento de RCDpara ser convertidos en agregados minerales para concretos y asfaltoso aprovechamiento de RCD como llenantes minerales. Por eso, en esteart铆culo se presentan los resultados de un estudio realizado a 75 obraslocalizadas en las diferentes zonas de la ciudad de Barranquilla, en dondese realizaron encuestas en temas de manejo, tratamiento y disposici贸nfinal, al tiempo que se indag贸 sobre el conocimiento de la legislaci贸nlocal para el manejo de los RCD. A partir de los resultados obtenidos,se identific贸 que las pr谩cticas de gesti贸n de RCD que actualmente elgremio de la construcci贸n est谩 llevando a cabo no son las adecuadasy como soluci贸n se plantea una propuesta de mejora para el modelode gesti贸n (involucrando aprovechamiento y transformaci贸n) con elprop贸sito de que sea implementado en la ciudad en los siguientes a帽os
Transformar para educar 5: ambientes de aprendizaje naturalmente cr铆ticos
Este quinto libro de la colecci贸n "Transformar para Educar''.-producto de las investigaciones de aula adelantadas por docentes de la Universidad del Norte, con el apoyo del Centro para la Excelencia Docente (CEDU), en el marco del programa Transformaci贸n de curso-, busca difundir innovaciones en la pr谩ctica pedag贸gica, con el fin de mejorar las experiencias educativas de los estudiantes con base en la implementaci贸n de ambientes de aprendizaje naturalmente cr铆ticos. Son cr铆ticos porque los estudiantes razonan con sus propios argumentos y naturales porque se da de manera espont谩nea.
Contiene nueve cap铆tulos que recopilan las experiencias realizadas por los docentes del 谩rea de introducci贸n a la Ingenier铆a. Confiamos en que los hallazgos que aqu铆 se presentan sean de inter茅s para los lectores y puedan ser compartidos de manera amplia entre distintos p煤blicos
Una visi贸n de Ciudad sostenible desde el modelo de gesti贸n de los residuos de construcci贸n y demolici贸n (Rcd) caso De estudio: Barranquilla
Context: The large amount of Construction and Demolition Waste (RCD) that is generated has become a worldwide problem. For this reason, the legislation in Colombia seeks to guide its proper management and promote its use.
Methodology: This research proposes an alternative for the elaboration of the comprehensive management plan based on an analysis of the national and local legislation of the cities that are at the forefront in the management of the RCDs in Colombia. Based on this analysis, the conditions and characteristics of an intermediate city such as Barranquilla were studied and analyzed to propose an integral alternative for the management of this waste (management and treatment).
Results: The aspects of prevention, storage, collection, transport, use and final disposition to be taken into account within the comprehensive management plan of RCD most suitable for the city of Barranquilla were identified according to their conditions and a treatment plant scheme was proposed that considered more appropriate in its management.
Conclusions: Barranquilla requires a quick adjustment to its RCD management model, given its high development rate during the last years. It was recognized for this city that separation at source and use are fundamental in the model required to achieve a sustainable management process. In addition, weaknesses in the current management system were identified, associated with the use of a linear economy model, therefore, a management model based on the principles of circular economy is proposed.Contexto: La gran cantidad de Residuos de Construcci贸n y Demolici贸n (RCD) que se genera, se ha convertido en un problema a nivel Mundial. Por esta raz贸n, la legislaci贸n en Colombia busca orientar su adecuada gesti贸n y promover el aprovechamiento de estos.
Metodolog铆a: En esta investigaci贸n se plantea una alternativa para la elaboraci贸n del plan de gesti贸n integral basada en un an谩lisis de la legislaci贸n nacional y local de las ciudades que est谩n a la vanguardia en el manejo de los RCD en Colombia. Basado en este an谩lisis se estudiaron y analizaron las condiciones y caracter铆sticas de una ciudad intermedia como lo es Barranquilla para plantear una alternativa integral para el manejo de estos residuos (gesti贸n y tratamiento).
Resultados: Se identificaron acorde con sus condiciones los aspectos de prevenci贸n, almacenamiento, recolecci贸n, transporte, aprovechamiento y disposici贸n final a tener en cuenta dentro del plan de gesti贸n integral de RCD m谩s adecuado para la ciudad de Barranquilla y se plante贸 un esquema planta de tratamiento que se considera m谩s adecuado en su manejo.
Conclusiones: Barranquilla requiere un ajuste r谩pido a su modelo de gesti贸n de RCD, dada su alta tasa de desarrollo durante los 煤ltimos a帽os. Se reconoci贸 para esta ciudad que la separaci贸n en la fuente y el uso son fundamentales en el modelo requerido para lograr un proceso de gesti贸n sostenible. Adem谩s, se identificaron debilidades en el sistema de gesti贸n actual, asociadas con el uso de un modelo de econom铆a lineal, por lo tanto, se propone un modelo de gesti贸n basado en los principios de la econom铆a circular
The Chemical-Mineralogical Characterization of Recycled Concrete Aggregates from Different Sources and Their Potential Reactions in Asphalt Mixtures
The incorporation of a recycled concrete aggregate (RCA) as a replacement of natural aggregates (NA) in road construction has been the subject of recent research. This tendency promotes sustainability, but its use depends mainly on the final product’s properties, such as chemical stability. This study evaluates the physical and chemical properties of RCAs from two different sources in comparison with the performance of NA. One RCA was obtained from the demolition of a building (recycled concrete aggregate of a building—RCAB) and another RCA from the rehabilitation of a Portland cement concrete pavement (recycled concrete aggregate from a pavement—RCAP). Characterization techniques such as X-ray fluorescence (XRF), X-ray diffraction (XRD), UV spectroscopy, and atomic absorption spectrometry were used to evaluate the RCAs’ coarse fractions for chemical potential effects on asphalt mixtures. NA was replaced with RCA at 15%, 30%, and 45% for each size of the coarse fractions (retained 19.0, 12.5, 9.5, and 4.75 sieves in mm). The mineralogical characterization results indicated the presence of quartz (SiO2) and calcite (CaCO3) as the most significant constituents of the aggregates. XFR showed that RCAs have lower levels of CaO and Al2O3 concerning NA. Potential reactions in asphalt mixtures by nitration, sulfonation, amination of organic compounds, and reactions by alkaline activation in the aggregates were discarded due to the minimum concentration of components such as NO2, (–SO3H), (–SO2Cl), and (Na) in the aggregates. Finally, this research concludes that studied RCAs might be used as replacements of coarse aggregate in asphalt mixtures since chemical properties do not affect the overall chemical stability of the asphalt mixture