EVALUATION OF RE-CURING FOR THE RECOVERY OF FIRE DAMAGED HIGH-STRENGTH MORTAR
Repair utilizing re-curing has the potential to restore strength and durabilitywithout removal and casting operations,thus reducing waste generation and materialconsumption. In this research,the effect of different post-fire cooling and re-curing conditionson the behaviour of high-strength mortar was investigated. Results showed that air re-curingresulted in the formation of surface cracks due to differential thermal shrinkage,reducingstrength and significantly increasing air permeability and weakness to carbonation. Immediatewater submersion also resulted in large strength reductions,but was followed by strength,porosity,and crack recovery due to rehydration,which also contributed to air permeabilityrecovery and increased carbonation resistance. Specimens which were cooled in the air beforewater submersion underwent less strength loss but also recovered less during re-curing.
high-strength concrete fire damage repair mechanical recovery
Y. Kato M. Henry M. Suzuki
Institute of Industrial Science,University of Tokyo,Japan Department of Civil Engineering,University of Tokyo,Japan Department of Civil Engineering,Shibaura Institute of Technology,Japan
国际会议
The International Conference on Durability of Concrete Structures(2008年混凝土结构耐久性国际学术会议)
杭州
英文
1310-1316
2008-11-01（万方平台首次上网日期，不代表论文的发表时间）