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재하 및 가열을 받은 200㎫ 급 초고강도 철근콘크리트 기둥 부재의 내화성능 평가에 관한 연구
김우재(Kim Woo-Jae),김현배(Kim Hyun-Bae),김규용(Kim Kyu-Yong),김영선(Kim Yong-Sun) 대한건축학회 2009 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.29 No.1(구조계)
Recently, the evaluation of fire resistance performance is necessary to use the ultra high strength concrete on the high-rise building. On this study, the loading and heating test is performed for 200MPa ultra high strength concrete using nylon fiber at General Building Research Corporation of Japan. Several tests are performed for evaluation of fire-resistance performance: Tests for concrete characteristics strength properties, pre-test for fire resistance, loading and heating test followed by ISO-834 heating curve on the real-size specimen. Test for residual strength of the column structure after fire-resistance test will be performed.
콘크리트의 전염화물량 평가의 정밀도 향상에 관한 실험적 연구
김영선(Kim Young-Sun),김영덕(Kim Young-Duck),조봉석(Cho Bong-Suk),배기선(Bae Ki-Sun),김규용(Kim Kyu-Yong),김무한(Kim Moo-Han) 한국구조물진단유지관리학회 2006 한국구조물진단학회 학술발표회논문집 Vol.10 No.1
Worldwide, Certification systems for standard of material and quality of product exist very variously. Korean industrial Standard (KS) is most representatively certification systems in Korea. But labolatory of korea uses often ASTM, RILEM and JIS and these standards do not get into unionization. so, Granted that experiment is same, result still can different. Therefore, this research measured chloride amount of hardened concrete using identical material and wished to improve accuracy of chloride estimation as that comparison evaluate to each examination.
콘크리트의 전염화물량 평가의 정밀도 향상에 관한 실험적 연구
김영선 ( Kim Young-sun ),김영덕 ( Kim Young-duck ),조봉석 ( Cho Bong-suk ),배기선 ( Bae Ki-sun ),김규용 ( Kim Kyu-yong ),김무한 ( Kim Moo-han ) 한국구조물진단유지관리공학회 2006 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.10 No.1
Worldwide, Certification systems for standard of material and quality of product exist very variously. Korean industrial Standard (KS) is most representatively certification systems in Korea. But labolatory of korea uses often ASTM, RILEM and JIS and these standards do not get into unionization, so, Granted that experiment is same, result still can different. Therefore, this research measured chloride amount of hardened concrete using identical material and wished to improve accuracy of chloride estimation as that comparison evaluate to each examination.
분산방법에 따른 CNT를 혼입한 섬유보강 시멘트복합체의 유동성 평가
김문규 ( Kim Moon-kyu ),김규용 ( Kim Gyu-yong ),편수정 ( Pyeon Su-jeong ),최병철 ( Choi Byung-cheol ),박준영 ( Park Jun-young ),남정수 ( Nam Jeong-soo ) 한국건축시공학회 2023 한국건축시공학회 학술발표대회 논문집 Vol.23 No.1
In this study, the table flow of fiber reinforced cement composites mixed with CNTs dispersed differently according to the dispersion method was evaluated. The mixture was composed of plain mixture according to the presence or absence of ultrasonic dispersion and PCE-based dispersants A and B of 0.5% and 1.0%, respectively, CNT was mixed with 0.03% of cement weight and fiber was mixed with 1.5% of total volume. As a result of the experiment, NC-A0.5 showed a fluidity similar to that of P without CNT. The fluidity of NC-A0.5 and P-N showed a similar tendency, which is considered to be due to the distribution of evenly dispersed CNT particles without agglomeration between cement particles due to the dispersant. NC-B0.5 showed a similar level of firmness to P-U, but after hitting 250 mm, B Agent seems to have a significant effect on liquidity improvement.Both NC-A1.0 and NC-B1.0 seem to have increased flow due to excessive dispersion.