논문 상세보기
pp.83-91
The purpose of this study is to assess a fire-damaged concrete structure using a digital camera and image processing software. To simulate it, mortar and paste samples of W/C=0.5(general strength) and 0.3(high strength) were put into an electric furnace and simulated from 100 ℃ to 1000 ℃. Here, the paste was processed into a powder to measure CIELAB chromaticity, and the samples were taken with a digital camera. The RGB chromaticity was measured by color intensity analyzer software. As a result, the residual compressive strength of W/C=0.5 and 0.3 was 87.2 % and 86.7 % at the heating temperature of 400 ℃. However there was a sudden decrease in strength at the temperature above 500 °C, while the residual compressive strength of W/C=0.5 and 0.3 was 55.2 % and 51.9 % of residual strength. At the temperature 700 ℃ or higher, W/C=0.5 and W/C=0.3 show 26.3% and 27.8% of residual strength, so that the durability of the structure could not be secured. The results of L*a*b color analysis show that b* increases rapidly after 700 ℃. It is analyzed that the intensity of yellow becomes strong after 700 ℃. Further, the RGB analysis found that the histogram kurtosis and frequency of Red and Green increases after 700 ℃. It is analyzed that number of Red and Green pixels are increased. Therefore, it is deemed possible to estimate the degree of damage by checking the change in yellow(b* or R+G) when analyzing the chromaticity of the fire-damaged concrete structures.
1. 서 론
2. 색(color)의 표시방법
2.1 L*a*b 표색계
3. 실험 개요
3.1 사용 재료 및 양생 방법
3.2 화재 피해 모사 방법
3.3 물리적 시험 방법
3.4 색도 측정 방법
4. 실험 결과 및 분석
4.1 물리적 시험 결과
4.2 색도 분석 결과
5. 결 론
References
