Evaluación de la permeabilidad al aire en especímenes de hormigón elaborados con cemento de bajo carbono (LC3)
Fecha
2017-06
Autores
Sánchez Bermúdez, Henry
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Editor
Universidad Central "Marta Abreu" de Las Villas. Facultad de Construcciones. Departamento de Ingeniería Civil.
Resumen
En esta investigación se evaluó la porosidad de hormigones elaborados con cemento LC3 a partir de los métodos de medición de permeabilidad al aire por el método de Torrent y resistividad eléctrica. El objetivo que se perseguía es: evaluar la durabilidad de estructuras de hormigón armado desde el punto de vista de su porosidad.
Las muestras se tomaron de diferentes sitios de exposición, de esta forma se determina la influencia del medio sobre los diferentes tipos de hormigones. Además, se emplearon diferentes cantidades de clínquer y relación arcilla calcinada–caliza en la elaboración del LC3 para determinar la dosificación de mejor desempeño. En el CIDC en La Habana se analizan probetas sometidas a diferentes días de curado.
Al analizar los resultados obtenidos en esta investigación se determinó que: la permeabilidad al aire independientemente del sitio de exposición al que estén sometidos los hormigones fabricados con LC3, es generalmente menor comparado con los hormigones donde se utilizó cemento portland. La resistividad eléctrica confirma que al emplear cemento LC3 en los hormigones se obtiene una mejor estructura de poros que si se empleara cemento portland. El tiempo de curado tanto de hormigones de LC3 o de cemento portland es fundamental si se quiere lograr hormigones menos porosos.
This research evaluated the porosity of concrete made with LC3 cement from the methods of measurement of air permeability by the Torrent method and electrical resistivity. The objective was to evaluate the durability of reinforced concrete structures from the point of view of their porosity. The samples were taken from different exposure sites, thus determining the influence of the medium on the different types of concrete. In addition, different amounts of clinker and calcined-limestone clay ratio were used in the LC3 processing to determine the best performance dosage. At the CIDC in Havana, specimens submitted to different curing days are analyzed. When analyzing the results obtained in this research, it was determined that: the permeability to the air independently of the exposure site to which the concrete made with LC3 is subjected, is generally smaller compared to the concrete where portland cement was used. The electrical resistivity confirms that when using LC3 cement in the concrete, a better pore structure is obtained than if portland cement were used. The curing time of both LC3 concrete and portland cement is critical if less porous concrete is to be achieved.
This research evaluated the porosity of concrete made with LC3 cement from the methods of measurement of air permeability by the Torrent method and electrical resistivity. The objective was to evaluate the durability of reinforced concrete structures from the point of view of their porosity. The samples were taken from different exposure sites, thus determining the influence of the medium on the different types of concrete. In addition, different amounts of clinker and calcined-limestone clay ratio were used in the LC3 processing to determine the best performance dosage. At the CIDC in Havana, specimens submitted to different curing days are analyzed. When analyzing the results obtained in this research, it was determined that: the permeability to the air independently of the exposure site to which the concrete made with LC3 is subjected, is generally smaller compared to the concrete where portland cement was used. The electrical resistivity confirms that when using LC3 cement in the concrete, a better pore structure is obtained than if portland cement were used. The curing time of both LC3 concrete and portland cement is critical if less porous concrete is to be achieved.
Descripción
Palabras clave
LC3, Durabilidad, Portland, Permeabilidad al Aire, Resistividad Eléctrica, Durability, Permeability, Electric Resistance