내화 마감재 종류에 따른 고성능 RC기둥의 폭열방지 및 온도이력 특성 = Properties of Temperature History and Spalling Resistance of High Performance RC Column with Finishing Materical

다국어 초록 (Multilingual Abstract)

High Performance Concrete(HPC) has been widely used in high-rise building. The HPC has several benefits including high strength, high fluidity and high durability. However, spalling is susceptible to occur in HPC and HPC also tends to be deteriorated in the side of fire resistance performance at fire. This paper focuses on the analysis of the temperature history and residual compressive strength with finishing material, in order to protect HPC from sudden-high-temperature, which is one of the main reason spalling occurs. Test results show that spalling occurs in all specimens. The most serious spalling took placed in HPC covering fire enduring spray-on material, whose covering thickness is 20mm but temperature history indicates that fire enduring spray effectively protected HPC from fire for more than 2hours. In addition, residual compressive strength ratio of HPC using fire enduring paint was more than 90% of original strength, thus minimizing spalling and indicating significant fire resistance performance.