Uso del exudado de Cedrela odorata Linnaeus en la inhibición de la corrosión por cloruros en concreto reforzado
Resumen
En este trabajo se evaluó el uso del exudado del árbol de cedro en la penetración de los cloruros y la incidencia de corrosión mediante ensayos de potencial eléctrico del acero en el concreto reforzado. Para esto, se evaluó el porcentaje de exudado en la mezcla de 0,3; 0,5; 0,7 y 0,9 % por peso de cemento, bajo relaciones agua/cemento (a/c) de 0,55 y 0,60. Se midió el contenido de cloruros solubles en agua del polvillo de concreto extraído a 0,5, 1,0 y 2,0 cm de profundidad de la probeta de acuerdo con la norma astm C1218/C1218M, mientras que la incidencia de corrosión se determinó a través de la medición de potenciales eléctricos con la norma astm C876. Hubo una incidencia favorable de 0,46 % por peso de concreto al emplear 0,7 % del exudado y una relación a/c 0,55 a la profundidad más cercana al acero respecto a 0,55 % del blanco. La incidencia de corrosión del acero alcanzó a reducirse al 10 % con potenciales mayores a -0,2 V.Descargas
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