Autor(es):
Aguiar, J. L. Barroso de 
; Pimenta, T. J. ; Araújo, Marcelo Marinho de
Data: 2004
Identificador Persistente: http://hdl.handle.net/1822/3044
Origem: RepositóriUM - Universidade do Minho
Detalhes do Documento
Effect of temperature on the rupture of systems for the reinforcement of concrete
Descrição
The adhesives used in systems for the external reinforcement of concrete are epoxies. Like all the polymers, they have low thermal resistance. This paper presents the results of an experimental work made with specimens of hydraulic mortar reinforced on the exterior with steel or CFRP plates. The specimens were exposed seven days, to temperatures between 20 and 250 ºC. To determine the adhesion, we used flexure tests. The results of the tests show a decrease of the adhesion strength with temperature. The failures change to adhesive failures above 150 ºC and 200 ºC, for the reinforcement with steel plates and for the reinforcement with CFRP plates, respectively. Even maintaining the mortar failures, the efficiency of the reinforcements decreases significantly above 50 ºC. This temperature can be considerer as the thermal resistance of the two tested reinforcements.
The adhesives used in systems for the external reinforcement of concrete are epoxies. Like all the polymers, they have low thermal resistance. This paper presents the results of an experimental work made with specimens of hydraulic mortar reinforced on the exterior with steel or CFRP plates. The specimens were exposed seven days, to temperatures between 20 and 250 ºC. To determine the adhesion, we used flexure tests. The results of the tests show a decrease of the adhesion strength with temperature. The failures change to adhesive failures above 150 ºC and 200 ºC, for the reinforcement with steel plates and for the reinforcement with CFRP plates, respectively. Even maintaining the mortar failures, the efficiency of the reinforcements decreases significantly above 50 ºC. This temperature can be considerer as the thermal resistance of the two tested reinforcements.
Tipo de Documento
Documento de conferência
Idioma Inglês
Idioma Inglês
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