CAJ | 학술논문

为研究界面过渡区微结构在碳化过程中的演变规律，运用背散射（ BSE ）图像分析技术，使用灰度值统计方法，对比分析了水胶比ρ＝0．53，0．35，0．23时混凝土试件中界面过渡区和基体在碳化前后的微结构特征．结果表明，当ρ＝0．53，0．35时，试件界面过渡区的孔隙率分别从碳化前的24．97％和16．07％减小到碳化后的20．29％和12．27％，而当ρ＝0．23时试件碳化后孔隙率则有所提高．同时，各试件界面过渡区和基体的未水化水泥含量在碳化后均有所下降．因此，在加速碳化条件下，不同水胶比试件的微结构演变规律存在较大差异，界面过渡区和基体的碳化现象也有所差别，且当ρ＝0．53时两者的碳化现象最明显，ρ＝0．23时碳化现象最不明显．
위연구계면과도구미결구재탄화과정중적연변규률，운용배산사（ BSE ）도상분석기술，사용회도치통계방법，대비분석료수효비ρ＝0．53，0．35，0．23시혼응토시건중계면과도구화기체재탄화전후적미결구특정．결과표명，당ρ＝0．53，0．35시，시건계면과도구적공극솔분별종탄화전적24．97％화16．07％감소도탄화후적20．29％화12．27％，이당ρ＝0．23시시건탄화후공극솔칙유소제고．동시，각시건계면과도구화기체적미수화수니함량재탄화후균유소하강．인차，재가속탄화조건하，불동수효비시건적미결구연변규률존재교대차이，계면과도구화기체적탄화현상야유소차별，차당ρ＝0．53시량자적탄화현상최명현，ρ＝0．23시탄화현상최불명현．
To study the microstructure evolution of the interfacial transition zone ( ITZ) in the car-bonization process, the microstructural features of the ITZs and the matrixes in the concrete samples before and after carbonization with the water-binder ratio ρ of 0.53, 0.35 and 0.23 are analyzed comparatively by using the gray value statistics method and the backscattered electron ( BSE) image analysis technique.The results show that the porosities of the ITZs in the concrete samples reduce from 24.97%and 16.07%to 20.29% and 12.27% after carbonization when ρ=0.53 and 0.35, respectively, while it increases whenρ=0.23.Meanwhile, all of the unhydrated cement contents of the ITZs and the matrixes in the concrete samples with three kinds of water-binder ratios decrease af-ter carbonization.Therefore, under the accelerated carbonization condition, the microstructure evo-lutions of the samples with different water-binder ratios are different.The carbonization appearance of the ITZs and the matrixes are also different.The carbonization appearance of the ITZ and that of the matrix are the most obvious when ρ=0.53, while they are the least obvious for when=0.23.