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고강도 콘크리트의 폴리머수지 혼입율 변화에 따른 내화특성 검토
( Pei Chang-chun ),허영선 ( Heo Young-sun ),이보형 ( Lee Bo-hyeong ),한창평 ( Hann Chang-pyung ),양성환 ( Yang Seong-hwan ),한천구 ( Han Cheon-goo ) 한국구조물진단유지관리공학회 2007 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.11 No.1
This study investigates spalling appearance and residual compressive strength after examination of fundamental properties on the concrete and fire test to prevent spalling of the concrete. Test results showed that fluidity, air content, and compressive strength are excellent in the case that polyethylene Polyvinyl Acetate and polyvinyl alcohol fiber was mixed. After fire test, it is analyzed that using polyvinyl alcohol fiber is effective considering spalling property.
고강도 콘크리트의 폴리머수지 혼입율 변화에 따른 내화특성 검토
裵長春(Pei Chang-Chun),허영선(Heo Young-Sun),이보형(Lee Bo-Hyeong),한창평(Hann Chang-Pyung),양성환(Yang Seong-Hwan),한천구(Han Cheon-Goo) 한국구조물진단유지관리학회 2007 한국구조물진단학회 학술발표회논문집 Vol.11 No.1
This study investigates spalling appearance and residual compressive strength after examination of fundamental properties on the concrete and fire test to prevent spalling of the concrete. Test results showed that fluidity, air content, and compressive strength are excellent in the case that polyethylene Polyvinyl Acetate and polyvinyl alcohol fiber was mixed. After fire test, it is analyzed that using polyvinyl alcohol fiber is effective considering spalling property.
복합 유기섬유 혼입율 변화에 따른 고성능 콘크리트의 폭렬방지
이주선(Lee Ju-Sun),배장춘(Pei Chang-Chun),지석원(Jee Suk-Won),한창평(Han Chang-Pyung),양성환(Yang Seong-Hwan),한천구(Han Cheon-Goo) 대한건축학회 2008 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.28 No.1(구조계)
This study analyzed fire-resistant stability of high performance concrete according to the change of hybrid organic fiber. Firstly, from the flowing characteristics of the fresh concrete, all mixing conditions satisfied target range, the fluidity due to the increase of fiber was lowered to 20%, air content generally had no variation as the hybrid organic fiber contents is increased. From the characteristic of hardened concrete, the compressive strength showed the different tendencies, respectively according to fiber contents, in case of mixing with PP 0.025%, it was appeared to be increased by about 6.5% than plain. From the fire-resistant characteristic, it was over 0.1% in case of using PP alone and over 0.075% in case of using NY alone. But, in case of PP+NY, if it was over 0.05(0.025+0.025)%, spalling was appeared to be prevented, the smallest mass loss rate was appeared and the residual compressive strength rate also was appeared to be most excellent. Synthetically, considering the characteristic of the fresh concrete the mechanical characteristic and further the economical efficiency, the case of PP 0.025%+NY0.025% mixing is judged as the most efficient spalling prevention engineering method of high performance concrete.
내화성 고강도 콘크리트 구조물의 화재 후 반발도 특성 비교
박천진 ( Park Chun-jin ),황동규 ( Hwang Dong-gyu ),한창평 ( Hann Chang-pyung ),양성환 ( Yang Seong-hwan ),한천구 ( Han Cheon-goo ) 한국구조물진단유지관리공학회 2009 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.13 No.2
The purpose of the study was to analyze damage characteristics and the remaining repulsion after testing a fire of high-strength concrete structure supposing a real housing building. The results of the study were as follows. Scaling and spalling were logically taken place in a pillar not mixing polylon fiber with fireproofing characteristics. However, a pillar mixing polylon fiber had a good fireproofing performance. The internal average temperature history of the real structure approached the highest temperature (713℃ on average) in about four minutes after c mbustion, and its duration time was very short as about 20 seconds. As the results of c minuing the standnud heating curve of KS 2257-1 with the internal average temperature history of the structure, the internal average temperature of the structure was beyond the standnud heating curve within enuly fs afininutes. In temperature history characteristics of an internal pillar of the structure, when polylon fiber was not mixed, repulsion on the average generally was lower about 10 than before the fire test and difference in the remaining internal force between the upper inut and the lower inut was about 5 on the average. On the other hand, when polylon fiber was mixed, average repulsion was lower about 4 than before the fire test and deviation between the upper part and the lower part was not large.