Corrosión en presas de ferrocemento
Abstract
Muchas comunidades en zonas áridas de Oaxaca México, no pueden retener el agua en época de lluvia y durante la sequÃa tienen graves problemas por falta del vital lÃquido. Una opción a este problema es la construcción de pequeñas presas de ferrocemento, tanto por su economÃa como por la facilidad del sistema empleado al construirlas. Sin embargo, debido al pequeño espesor de los elementos estructurales y reducido recubrimiento de éstas, el acero de refuerzo puede presentar corrosión debido a la acción de agentes agresivos. Para estudiar este fenómeno se evaluó el deterioro por corrosión de presas de ferrocemento. Se efectuaron pruebas de inspección visual, carbonatación y potenciales de corrosión. Durante la inspección visual se observó agrietamiento, delaminación y manchas de herrumbre que son evidencia fÃsica de la existencia de corrosión. Esto fue corroborado con los resultados de los potenciales de corrosión y las pruebas de carbonatación. Con base en lo anterior se concluye que las presas estudiadas tienen un alto riesgo de corrosión (más del 90%), y en algunos casos la corrosión es severa.Downloads
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