Evaluación de hormigones elaborados con cemento de bajo carbono en diferentes condiciones de agresividad de acuerdo a la Norma Cubana 120:2014
Fecha
2019-06
Autores
Sánchez Medina, Larianny
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Editor
Universidad Central “Marta Abreu” de las Villas
Resumen
En la presente investigación se efectúa un estudio de durabilidad en hormigones
fabricados con cemento de bajo carbono (LC3), en diferentes condiciones de
agresividad acorde a los parámetros de desempeño establecidos en la NC
120:2014 ´´Hormigón Hidráulico-Especificaciones´´, se realiza la toma de testigos
de los hormigones H1, H2, y H4 elaborados en el año 2016. Se llevaron a cabo los
ensayos de profundidad de carbonatación, permeabilidad al aire, migración de
iones cloruro, resistividad eléctrica y absorción capilar para poder determinar los
cambios que experimentó la serie 2 años frente a la serie 1.5 años y 6 meses y los
hormigones elaborados con cemento bajo carbono (LC3) frente a los elaborados
con Cemento Portland Ordinario (CPO).
Posteriormente al análisis de los resultados se puede constatar que los
especímenes elaborados con LC3 presentan valores de carbonatación más altos
que los de CPO y son más permeables que estos, a excepción de los expuestos a
un ambiente de agresividad muy alta, los hormigones elaborados con cemento
LC3 tienen mayor resistividad eléctrica y presentan mayor resistencia a la
penetración del ion cloruro con respecto a los elaborados con CPO. El paso del
tiempo tiene una influencia favorable en los hormigones elaborados con LC3 en
comparación con los elaborados con CPO, pues la serie 2 años muestra mejores
resultados de permeabilidad al aire, resistividad eléctrica y penetración al ion
cloruro, según la NC 120: 2014.
In the present investigation a durability study is carried out in concrete made with low carbon cement (LC3), in different conditions of aggressiveness according to the performance parameters established in the NC 120: 2014 "Hydraulic Hydraulic Specifications". It makes the taking of witnesses of the H1, H2, and H4 concretes made in 2016. Carbonation depth tests, air permeability, migration of chloride ions, electrical resistivity and capillary absorption were carried out in order to determine the changes that experienced the series 2 years compared to the series 1.5 years and 6 months and the concretes made with cement under carbon LC3 compared to those made with Ordinary Portland Cement (CPO). After analyzing the results, it can be seen that the specimens made with LC3 have higher carbonation values than those of CPO and are more permeable than these, except for those exposed to an environment of very high aggressiveness, concretes made with cement LC3 have greater electrical resistivity and have greater resistance to penetration of the chloride ion with respect to those made with CPO. The passage of time has a more favorable influence on concretes made with LC3 than those made with CPO, since the 2-year series shows better results of air permeability, electrical resistivity and chloride ion penetration, according to NC 120: 2014.
In the present investigation a durability study is carried out in concrete made with low carbon cement (LC3), in different conditions of aggressiveness according to the performance parameters established in the NC 120: 2014 "Hydraulic Hydraulic Specifications". It makes the taking of witnesses of the H1, H2, and H4 concretes made in 2016. Carbonation depth tests, air permeability, migration of chloride ions, electrical resistivity and capillary absorption were carried out in order to determine the changes that experienced the series 2 years compared to the series 1.5 years and 6 months and the concretes made with cement under carbon LC3 compared to those made with Ordinary Portland Cement (CPO). After analyzing the results, it can be seen that the specimens made with LC3 have higher carbonation values than those of CPO and are more permeable than these, except for those exposed to an environment of very high aggressiveness, concretes made with cement LC3 have greater electrical resistivity and have greater resistance to penetration of the chloride ion with respect to those made with CPO. The passage of time has a more favorable influence on concretes made with LC3 than those made with CPO, since the 2-year series shows better results of air permeability, electrical resistivity and chloride ion penetration, according to NC 120: 2014.
Descripción
Palabras clave
Durabilidad, Hormigón, Cemento bajo carbono (LC3), Norma cubana, Sitios de exposición, Durability, Concrete, Low carbon cement (LC3), Cuban norm, Exhibition sites