| Title |
Temperature Variation Corresponding to the Protection Method and Edge Distance in Near-Surface-Mounted FRP in Concrete with Fire Protection |
| Authors |
Lim, Jong-wook ; Seo, Soo-yeon |
| DOI |
https://doi.org/10.5659/JAIK_SC.2019.35.11.137 |
| Keywords |
Fiber reinforced polymer (FRP); Near-Surface-Mounting method; Effect of temperature rise retardation; Epoxy in groove; Glass transition temperature |
| Abstract |
Recently, the Near-Surface-Mounting method using Fiber reinforced polymer (FRP) has been developed and applied to the reinforcement of
many concrete structural members. However, as a part of the fire resistance design, there is a lack of research related to fire insulation for
the areas reinforced with FRP. In case of NSM reinforcement, there is a difference in the transferred temperature from the external surface
to the groove corresponding to the location of the groove where the FRP is embedded, and the effect of this should be reflected in the
fireproof insulation design. Therefore, in this study, after forming grooves for surface embedding in concrete blocks, fireproof insulation
reinforcement was performed using Calcium Silicate (CS) fireproof board and an experiment to evaluate the temperature transfer was
performed. By observing the temperature at these groove positions, the reduction of temperature transfer according to fireproof insulation
detail was studied. As a result, when the NSM-FRP is properly fire-insulated using the CS-based fireproof board, the epoxy inside the groove
does not reach its glass transition temperature until the external temperature reaches 800°C. |