11 documents found, page 1 of 2

Effect of temperature on RC elements strengthened with CFRP

The strengthening of RC elements with CFRP is a technique that has been acquiring more and more potential. The bond between the CFRP reinforcement and the concrete support is usually made with epoxy adhesives. However, it is here that the integrity of the system can be affected, namely by exposure to high temperatures. In order to study the effect of an increase of air temperature on the behaviour of the epoxy ...

Effect of temperature on systems for the reinforcement of concrete

This paper presents an experimental work using prismatic specimens of hydraulic mortar reinforced on the exterior with steel or CFRP plates. The adhesive used was an epoxy. Two series of tests were made. In the first one, the specimens were exposed seven days to temperatures between 20 ºC and 250 ºC, after which they were subjected to flexure tests made at 20 ºC. In the second series, the specimens were exposed...

Effect of temperature on systems for the reinforcement of concrete

This paper presents an experimental work using prismatic specimens of hydraulic mortar reinforced on the exterior with steel or CFRP plates. The adhesive used was an epoxy. Two series of tests were made. In the first one, the specimens were exposed seven days to temperatures between 20 ºC and 250 ºC, after which they were subjected to flexure tests made at 20 ºC. In the second series, the specimens were exposed...

Protection of RC elements strengthened with CFRP against high temperatures

The strengthening of RC elements with CFRP is a technique that has been acquiring more and more potential. The bond between the CFRP laminates and the concrete support is usually made with epoxy adhesives. However, it is in this part that the integrity of the system can be affected, namely by exposure to high temperatures. In order to evaluate the thermal behaviour, reference RC and CFRP strengthened RC specime...

Influência de temperaturas elevadas no comportamento de reforços exteriores de ...

De alguns anos a esta parte, a manifestação de anomalias em construções de betão armado tem aumentado significativamente. Este problema implicou o aparecimento e o desenvolvimento de materiais e técnicas para a resolução destes problemas. O reforço recorrendo a chapas coladas pelo exterior dos elementos de betão é uma das técnicas mais utilizadas. Para tal, chapas de aço e, mais recentemente, de FRP (Polímeros ...

Influência da temperatura no comportamento de elementos de betão armado reforça...

A necessidade de reabilitação estrutural de elementos de betão armado tem-se revelado cada vez mais frequente. O reforço por adição de armaduras exteriores através da aplicação de compósitos de fibra de carbono é, actualmente, a técnica de utilização mais generalizada e com maior potencial. Em muitos casos, a aplicação de compósitos pode significar um meio de aumentar a vida útil de uma estrutura que possivelme...

Effect of temperature on systems for the reinforcement of concrete

This paper presents an experimental work using prismatic specimens of hydraulic mortar reinforced on the exterior with steel or CFRP plates. The adhesive used was an epoxy. Two series of tests were made. In the first one, the specimens were exposed seven days to temperatures between 20 ºC and 250 ºC, after which they were subjected to flexure tests made at 20 ºC. In the second series, the specimens were exposed...

Effect of temperature on the durability of systems for strengthening of concret...

Nowadays, there is a need in solving problems about the reinforcement of concrete structures. The external reinforcement of concrete with composite materials is a technique that has acquired more and more potential. The bond between reinforcement and support is usually made with epoxy adhesives. However, it is in this part that the integrity of the system can be affected, namely by exposure to high temperatures...

Influência da temperatura no comportamento de reforços exteriores de betão armado

Influência de temperaturas elevadas no comportamento de reforços exteriores de ...

Hoje em dia, há a necessidade de resolver problemas em estruturas de betão armado. O reforço por adição de armaduras exteriores à base de materiais compósitos é uma das técnicas que tem vindo a adquirir cada vez mais potencial. A união entre o reforço e o suporte, geralmente é realizada com colas de base epoxídica. Contudo, é nesta fracção do sistema que a integridade do reforço pode ser afectada. Entre várias ...