Evaluation of the mechanical response of calcarenite specimens confined with fiber reinforced polymers after high temperature exposure

Although the confinement of compressed columns with composite materials has been extensively studied during last decades, scarce research conducted in particular case reinforcement stone or masonry elements subjected to high temperatures. This work reports an experimental study on mechanical behavior cylindrical specimens exposed temperatures 600 °C and subsequently cooled two different methods: slow air cooling rapid water immersion. The effect by means carbon glass fiber reinforced polymers (FRP) is studied. properties rock are also analyzed non-destructive tests, which constitute very appropriate techniques when working heritage buildings. In general terms, it was found that temperature significantly reduced strength elastic modulus rock. On other hand, FRP provided large increases ultimate strain, compared unreinforced samples. An important finding this response confined seems depend basically laminate, not damage core may have suffered. Finally, results predictions analytical models included most relevant international design guides. It proven these seem provide accurate unheated unaltered stone, although they show larger deviations specimens.