Análisis de la reparación con materiales de matriz polimérica con fibras (PRFS), de vigas de hormigón armado afectadas por corrosión
Date
2011-10-28
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Abstract
Se hace necesario estudiar nuevos materiales y técnicas que permitan reforzar en forma efectiva estructuras deterioradas. En este sentido, el uso de materiales de matriz polimérica reforzados con fibras (PRF) se ha convertido en un método efectivo, con excelentes potenciales para el refuerzo de elementos de hormigón armado.
En este trabajo se presenta un estudio experimental donde se evalúa la viabilidad del uso de polímeros reforzados con fibras de carbono (PRFC) para rehabilitar vigas de hormigón armado dañadas por corrosión. Las vigas fueron sometidas a un proceso acelerado de corrosión durante 30, 50, 70 y 90 días, reparadas externamente con PRFC, expuestas nuevamente al proceso corrosivo y ensayas a flexión a los 90 días. Los resultados de los ensayos revelaron que el uso de PRF para el refuerzo de vigas de hormigón armado afectadas por corrosión es una técnica eficaz, capaz de mantener la integridad estructural y mejorar su comportamiento.
It becomes necessary to study new materials and techniques that allow retrofitting of deteriorated structures efficiently. On this respect, the use of fiber reinforced polymers (FRP) is becoming an effective method, with excellent potential for concrete structure member retrofitting. An experimental study, aimed at examining the viability of using carbon fiber reinforced polymer (CFRP) wraps to strengthen or repair reinforced concrete beams subjected to corrosion damage is presented in this work. Beams were exposed to corrosion activity during 30, 50, 70 and 90 days and then, they were externally repaired with CFRP. After repairing, these specimens were exposed to further corrosion and 90 days later they were tested under flexion. Results of those tests showed that the use of FRP sheets for strengthening corroded reinforced concrete beams is an efficient technique that can maintain structural integrity and enhance the behavior of such beams.
It becomes necessary to study new materials and techniques that allow retrofitting of deteriorated structures efficiently. On this respect, the use of fiber reinforced polymers (FRP) is becoming an effective method, with excellent potential for concrete structure member retrofitting. An experimental study, aimed at examining the viability of using carbon fiber reinforced polymer (CFRP) wraps to strengthen or repair reinforced concrete beams subjected to corrosion damage is presented in this work. Beams were exposed to corrosion activity during 30, 50, 70 and 90 days and then, they were externally repaired with CFRP. After repairing, these specimens were exposed to further corrosion and 90 days later they were tested under flexion. Results of those tests showed that the use of FRP sheets for strengthening corroded reinforced concrete beams is an efficient technique that can maintain structural integrity and enhance the behavior of such beams.
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Keywords
Hormigón, Corrosión, Refuerzo de vigas, PRFC, Flexión, Concrete, Corrosion, Reinforced
Citation
Post Congreso CONPAT. XI Congreso Latinoamericano de Patología de la Construcción y XIII Congreso de Control de Calidad en la Construcción. COPANT. Córdoba. (2011).
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