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A platform for research: civil engineering, architecture and urbanism
Post-fire mechanical behavior and recovery of structural reinforced concrete beams
Highlights Fire exposure and re-curing cause changes in microstructure of concrete. Cracking behavior of concrete results in further deterioration in mechanical properties at the post-fire stage. Flexural rigidity of reinforced beam is more prone to deteriorate after the fire. Reformation of C-S-H gel resulted in the recovery in reinforced beams after water re-curing.
Abstract The results of fire tests obtained from small-sized specimens may fail to represent the real post fire behavior of structural elements. Therefore, in this study structural concrete beams were exposed to ISO fire curve and then subjected to different curing conditions to better understand the changes in concrete during the post-fire stage. Beams were tested under four-point bending to evaluate their residual mechanical performance, and scanning electron microscopy (SEM) was performed in order to monitor the changes in the morphology of concrete due to fire exposure. The results showed that high temperature exposure caused deterioration in the morphology and reduction in residual mechanical properties of concrete, while post-fire re-curing caused an improvement in residual mechanical properties and recovery in the microstructure.
Post-fire mechanical behavior and recovery of structural reinforced concrete beams
Highlights Fire exposure and re-curing cause changes in microstructure of concrete. Cracking behavior of concrete results in further deterioration in mechanical properties at the post-fire stage. Flexural rigidity of reinforced beam is more prone to deteriorate after the fire. Reformation of C-S-H gel resulted in the recovery in reinforced beams after water re-curing.
Abstract The results of fire tests obtained from small-sized specimens may fail to represent the real post fire behavior of structural elements. Therefore, in this study structural concrete beams were exposed to ISO fire curve and then subjected to different curing conditions to better understand the changes in concrete during the post-fire stage. Beams were tested under four-point bending to evaluate their residual mechanical performance, and scanning electron microscopy (SEM) was performed in order to monitor the changes in the morphology of concrete due to fire exposure. The results showed that high temperature exposure caused deterioration in the morphology and reduction in residual mechanical properties of concrete, while post-fire re-curing caused an improvement in residual mechanical properties and recovery in the microstructure.
Post-fire mechanical behavior and recovery of structural reinforced concrete beams
Akca, Abdullah Huzeyfe (author) / Özyurt, Nilüfer (author)
2020-04-12
Article (Journal)
Electronic Resource
English
High temperature , Structural reinforced concrete beam , Recovery , Deterioration , Microstructure , AEA , Air Entraining Admixture , C-S-H , Calcium Silicate Hydrate , EDAX , Energy Dispersive X-ray Analysis , EI , Flexural Rigidity , EN , European Norms , GGBFS , Ground Granulated Blast Furnace Slag , ISO , The International Organization for Standardization , LVDT , Linear Variable Differential Transducer , PC , Portland Cement , PP , Polypropylene , RC , Reinforced Concrete , SE , Secondary Electrons , SEM , Scanning Electron Microscopy , TS , Turkish Standard , WD , Working Distance
Structural behavior of reinforced concrete sandwich beams
| Engineering Index Backfile | 1962
Structural behavior of reinforced concrete sandwich beams
| TIBKAT | 1962