Análisis de las retracciones plásticas en morteros reforzados con fibras (variables ambientales)
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Fecha
2006
Autores
Profesor/a Guía
Facultad/escuela
Idioma
es
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Universidad Andrés Bello
Nombre de Curso
Licencia CC
Licencia CC
Resumen
Las fisuras en morteros y hormigones son producto de retracciones y pueden
transformarse en un problema que genera costos extras en construcción, ya sea por
las reparaciones necesarias o la aplicación de revestimientos protectores superficiales
para impedir el paso del agua al interior.
En general la fisuración y/o agrietamiento producido en el hormigón o mortero en
estado fresco, ha demostrado ser un fenómeno producido por una gran cantidad de
variables que se relacionan entre sí, haciéndolo un fenómeno complejo de controlar.
Estas variables se pueden clasificar según la etapa de desarrollo en que se encuentre
el proyecto.
En esta perspectiva, esta investigación tiene como objetivo el estudio del
comportamiento del mortero reforzado con fibras, con respecto a las variables que
aparecen durante la construcción, cuando son sometidas a condiciones ambientales
extremas, como una alta temperatura, baja humedad relativa y viento. Por otra parte se
cuantifica la influencia del contenido de distintos tipos de fibras en el control de la
fisuración plástica en morteros.
Para determinar la influencia de estas variables, se trabajó sobre un mortero base de
dosificación típica empleada en la sobrelosa, adicionándole diferentes tipos y
porcentajes de fibras.
Además, se estudian algunos parámetros que caracterizan los recubrimientos (sobrelosas), como son: el espesor del estrato de estudio, grado de restricción de la
base, y efecto del proceso constructivo especialmente el tipo de terminación.
Cracks in mortar and concrete can become a problem generating extra costs in construction, being as necessary repairs or as the application of superficial protective sheathings to prevent water penetration. In general, it has been demonstrated that fissures and/or cracking produced in fresh concrete or mortar are determined by a great number of variables related among each other, becoming a complex phenomenon to be controlled. These variables can be classified according to the stage of development in which the project is found. From this perspective, the present investigation is dedicated to the study of the behavior of the fiber-reinforced mortar, regarding the variables that appear during construction, when they are subjected to extreme environmental conditions, such as high temperature, low relative humidity and wind. On the other hand, the influence of the content of different types of fiber in the control of plastic cracking in mortar will be quantified. To determine the influence of these variables, the work was done over a mortar of typical proportioning employed on a superficial slab, adding different types of fibers and dossages of it. Besides, in this investigation, some parameters were established to characterise the superficial slabs, such as the thickness of the strata, degree of restriction of the base, and the effect of the constructive process specially in the type of finishing.
Cracks in mortar and concrete can become a problem generating extra costs in construction, being as necessary repairs or as the application of superficial protective sheathings to prevent water penetration. In general, it has been demonstrated that fissures and/or cracking produced in fresh concrete or mortar are determined by a great number of variables related among each other, becoming a complex phenomenon to be controlled. These variables can be classified according to the stage of development in which the project is found. From this perspective, the present investigation is dedicated to the study of the behavior of the fiber-reinforced mortar, regarding the variables that appear during construction, when they are subjected to extreme environmental conditions, such as high temperature, low relative humidity and wind. On the other hand, the influence of the content of different types of fiber in the control of plastic cracking in mortar will be quantified. To determine the influence of these variables, the work was done over a mortar of typical proportioning employed on a superficial slab, adding different types of fibers and dossages of it. Besides, in this investigation, some parameters were established to characterise the superficial slabs, such as the thickness of the strata, degree of restriction of the base, and the effect of the constructive process specially in the type of finishing.
Notas
Tesis (Ingeniero Constructor)
Palabras clave
Proyectos de Construcción (Costos), Hormigón (Fracturas)