지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학위논문
- 저자정보
- 지도교수
- 홍기남.
- 발행연도
- 2013
- 저작권
- 충북대학교 논문은 저작권에 의해 보호받습니다.
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이 논문의 연구 히스토리 (3)
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초록· 키워드
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Steam curing is a method of applying high temperature and steam and sharp reduction of construction duration is possible due to strength development in a short period. However, unaesthetic many air-voids with unknown cause are formed on the steam curing applied PC surface. In particular, as form oil is produced by mixing various chemicals, it responds very sensitively to temperature and is expected to have a significant effect on the quality of the concrete surface.
This study sets form oil used in PC production process as variable and applied one type of water-based form oil and four types of oil-based form oil. Steam curing was performed at curing temperature 70℃ and when curing was completed, photograph of each material was taken after form removal.
Data regarding concrete area was extracted from images secured from the experiment through pre-treatment process. For surface air-void extraction, SVM algorithm loaded on ENVI, commercial remote exploration program, was used to perform classification of images and final result images were generated through post-treatment.
As a result of the experiment, about two times less surface air-voids were formed on the oil-based form oil compared to water-based form oil and void fractions of specimens using low, medium, and high viscosity were 0.105%, 0.050%, 0.038% respectively and using high viscosity form oil suppressed formation of air-void on the concrete surface. Also, experimenting on form oil with flash points of 26℃ and 70℃ showed that void fraction of form oil with flash point 26℃ was about 2 times greater. Form oil with flash point 26℃ is considered to promote formation of air-voids due to steam curing temperature.
This study sets form oil used in PC production process as variable and applied one type of water-based form oil and four types of oil-based form oil. Steam curing was performed at curing temperature 70℃ and when curing was completed, photograph of each material was taken after form removal.
Data regarding concrete area was extracted from images secured from the experiment through pre-treatment process. For surface air-void extraction, SVM algorithm loaded on ENVI, commercial remote exploration program, was used to perform classification of images and final result images were generated through post-treatment.
As a result of the experiment, about two times less surface air-voids were formed on the oil-based form oil compared to water-based form oil and void fractions of specimens using low, medium, and high viscosity were 0.105%, 0.050%, 0.038% respectively and using high viscosity form oil suppressed formation of air-void on the concrete surface. Also, experimenting on form oil with flash points of 26℃ and 70℃ showed that void fraction of form oil with flash point 26℃ was about 2 times greater. Form oil with flash point 26℃ is considered to promote formation of air-voids due to steam curing temperature.
목차
Ⅰ. 서 론 11.1 연구의 목적 및 필요성 11.2 연구 동향 31.3 연구 방법 및 범위 5Ⅱ. 콘크리트의 표면기포 발생 및 영상분석기법 72.1 콘크리트 표면기포 발생 72.1.1 다짐 82.1.2 거푸집 종류 92.1.3 콘크리트 배합비 92.2 영상분석기법 92.2.1 히스토그램 조정 102.2.2 영상분류 112.2.3 노이즈 제거 12Ⅲ. 실험개요 133.1 사용재료 133.2 배합설계 153.3 콘크리트 양생 153.4 실험변수 173.5 실험체 제작 173.6 실험방법 및 장치 19Ⅳ. 실험결과 및 고찰 204.1 박리제 특성의 결과 254.2 박리제 인화점의 결과 264.3 박리제 점도의 결과 27Ⅴ. 결론 28참고문헌 30
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