Evaluación de la influencia de cementos con sustituciones de clínquer al 60% y 70% por una mezcla de arcilla calcinada y caliza en morteros de albañilería
Fecha
2015-07-06
Autores
Hernández González, Yanselys
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Editor
Universidad Central "Marta Abreu" de las Villas
Resumen
La presente investigación integra la evaluación de las propiedades de los morteros de albañilería para la conservación de morteros históricos, elaborados a partir de cementos de bajo contenido de carbono LC3-60 (2:1) y LC3-75 (2:1), tomando como referencia al cemento Portland Puzolánico PP-25, mediante la realización de ensayos físico-mecánicos y de durabilidad de acuerdo con las especificaciones establecidas en la norma cubana NC 175:2002.
Para analizar y valorar el comportamiento que pueden tener los cementos LC3-60 (2:1) y LC3-75 (2:1) en los morteros de albañilería se confeccionó un diseño experimental, en el que se consideraron las definiciones de variables dependientes, respondiendo a la propiedades de los morteros en sus diferentes estados, y las variables independientes, analizando factores como los cementos y tipos de morteros. Se elaboraron morteros tipo II y III, según la NC 175:2002 con los que se confeccionaron probetas prismáticas de 40 x 40 x 160 mm para la realización de los ensayos de resistencia mecánica, absorción de agua por capilaridad, densidad aparente, porosidad total y carbonatación.
El análisis de los resultados se realizó mediante el software Statgraphics, lo que permitió el estudio del comportamiento de los cementos LC3-60 (2:1) y LC3-75 (2:1) en morteros de albañilería con empleo de arena sílice del yacimiento Casilda según las especificaciones exigidas por las normativas cubanas para su posible uso en la conservación de morteros históricos.
Palabras clave: morteros, conservación, físico-mecánicos, durabilidad, cemento LC3.
This research integrates the evaluation of the properties of masonry mortars for the conservation of historic mortars, made from cements of low carbon content LC3-75 (2:1) and LC3-60 (2:1), taking into account Portland pozzolan cement PP-25, by performing physical-mechanical and durability tests according to the specifications of the International Standard Nc175: 2002. In order to analyze and evaluate the behavior that LC3-75 (2:1) and LC3-60 (2:1) cements may have in masonry mortars, an experimental design was prepared, in which it were considered the definitions of dependent variables (responding to the properties of mortars in different states), and independent variables (analyzing factors such as types of cements and mortars). Type II and III mortars were produced, according to the NC 175: 2002, and with them it were prepared prismatic specimens (40x40x160 mm) for conducting tests of mechanical strength, water absorption by capillarity, apparent density, total porosity and carbonation. The analysis of the results was performed by Statgraphics software, allowing to study the behavior of LC3-60 (2:1) and LC3-75 (2.1) cements and masonry mortars using silica sand from Casilda’s deposit, according to specifications demanded by Cuban standards for possible use in the restoration of historic mortars. Keywords: mortars, conservation, physical-mechanical, durability tests, LC3 cement.
This research integrates the evaluation of the properties of masonry mortars for the conservation of historic mortars, made from cements of low carbon content LC3-75 (2:1) and LC3-60 (2:1), taking into account Portland pozzolan cement PP-25, by performing physical-mechanical and durability tests according to the specifications of the International Standard Nc175: 2002. In order to analyze and evaluate the behavior that LC3-75 (2:1) and LC3-60 (2:1) cements may have in masonry mortars, an experimental design was prepared, in which it were considered the definitions of dependent variables (responding to the properties of mortars in different states), and independent variables (analyzing factors such as types of cements and mortars). Type II and III mortars were produced, according to the NC 175: 2002, and with them it were prepared prismatic specimens (40x40x160 mm) for conducting tests of mechanical strength, water absorption by capillarity, apparent density, total porosity and carbonation. The analysis of the results was performed by Statgraphics software, allowing to study the behavior of LC3-60 (2:1) and LC3-75 (2.1) cements and masonry mortars using silica sand from Casilda’s deposit, according to specifications demanded by Cuban standards for possible use in the restoration of historic mortars. Keywords: mortars, conservation, physical-mechanical, durability tests, LC3 cement.
Descripción
Palabras clave
Sustitución de 60% y 75% Clínquer, Mezcla de Arcilla Calcinada, Mezcla de Arcilla Caliza, Morteros de Albañilería, Clay