Componentes, diseño y puesta en obra de microaglomerados en frío
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Fecha
2007
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Profesor/a Guía
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es
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Universidad Andrés Bello
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Licencia CC
Licencia CC
Resumen
La presenta memoria de título, pretende ser una herramienta óptima y precisa, en
cuanto a la calidad de la información que se entrega, de manera de ser utilizada por
aquellas personas, ya sean estudiantes y/o profesionales del área de las Obras Viales.
El método de "Conservación de Pavimentos" que se desarrolla aquí, corresponde a los
llamados "Microaglomerados en Frío". Básicamente son Lechadas Asfálticas, en las
cuales se utilizan emulsiones asfálticas que han sido modificadas con polímeros, y con
áridos de granulometría más gruesas, lo cual permite un comportamiento superior a las
de las Lechadas Convencionales. Permitiendo además, ser colocadas en espesores
aproximados de 5 a 10 mm. (el doble de espesor permitido para una lechada
convencional).
Las principales características de esta técnica, son que se incorpora un agente
emulsificante y agua al cemento asfáltico, lo cual permite trabajar la mezcla a
temperatura ambiente (por esto se le llama "en frío"), y que poseen polímeros, que
corresponden a aditivos que mejoran considerablemente las características reológicas
de los Microaglomerados en Frío.
Las funciones principales que cumplen son: devolver la textura adecuada, mejorar la
fricción e impermeabilizar al pavimento. Esto último debido a que la granulometría
posee áridos finos, lo que permite sellar las grietas que se presentan en la carpeta de
rodado, ya sean térmicas o por fatiga de la mezcla.
Tomando en cuenta lo anteriormente expuesto, se hace necesario comenzar a
capacitar a los profesionales del área, en el conocimiento de las diferentes técnicas
necesarias para la conservación de pavimentos, ya que su complejidad y aplicación en
terreno, requiere de estudios específicos para su ejecución.
The following thesis, is meant to show, as an optimum and exact tool, as of quality of the information that is given, in the way of being used by students and/or professionals in the urban construction work area. The method "Pavement Preservation" that is developed in the following thesis, corresponds to what is known as "Microsurfacing". Basically, they are slurry seals, where Asphalt Emulsion are used, which have been modified with polymer, and with thicker aggregate of grade depressions, this allows a better behaviour than the conventional Slurry Seals. This also allows, being placed in thicknesses of approximately 5 to 10 mm. (two times the thickness permited for a conventional Slurry Seals). The main characteristics of this technique, is that water and moisturized element is incorporated to the asphalt cement, this allows the mixture to work at an environment temperature. This is why it's named "in cool", an that it has polymer, that correspond to additives that improve considerably the reologic characteristics of the Microsurfacing. The main functions are: to give back the proper texture, improve the friction and make the pavement water proof. The last function is due to the fine aggregate that the grade depressions contains, this allows to seal the cracks that are presented in the road way even if they're thermic or by fatigue of the mixture. Considering what was previously mentioned, it is necessary to begin to train professionals of the area, in the acknowledge of the different techniques required for pavement preservation, since it's complex and applications in terrain, requires specific studies necessary for it's execution.
The following thesis, is meant to show, as an optimum and exact tool, as of quality of the information that is given, in the way of being used by students and/or professionals in the urban construction work area. The method "Pavement Preservation" that is developed in the following thesis, corresponds to what is known as "Microsurfacing". Basically, they are slurry seals, where Asphalt Emulsion are used, which have been modified with polymer, and with thicker aggregate of grade depressions, this allows a better behaviour than the conventional Slurry Seals. This also allows, being placed in thicknesses of approximately 5 to 10 mm. (two times the thickness permited for a conventional Slurry Seals). The main characteristics of this technique, is that water and moisturized element is incorporated to the asphalt cement, this allows the mixture to work at an environment temperature. This is why it's named "in cool", an that it has polymer, that correspond to additives that improve considerably the reologic characteristics of the Microsurfacing. The main functions are: to give back the proper texture, improve the friction and make the pavement water proof. The last function is due to the fine aggregate that the grade depressions contains, this allows to seal the cracks that are presented in the road way even if they're thermic or by fatigue of the mixture. Considering what was previously mentioned, it is necessary to begin to train professionals of the area, in the acknowledge of the different techniques required for pavement preservation, since it's complex and applications in terrain, requires specific studies necessary for it's execution.
Notas
Tesis (Ingeniero Constructor)
Palabras clave
Pavimentos de Asfalto, Diseño y Construcción