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利用X射线CT技术对地下工程SBS改性沥青防水卷材的微观结构进行研究,探讨该技术在微观研究中的适用性。通过剪取SBS防水卷材原状试样置于显微CT系统上进行扫描,获得一系列的2D显微CT切片图像,借助图像处理软件进行3D图像的重构,并进行图像处理,最后基于重构图像进行数据的统计和分析。结果表明:对试样的3D重构图像进行分析可以获得添加物颗粒的相关参数,同时可以清楚观察到试样的层状分布形态;试样各区域材料的差异性较大;等效直径60μm是颗粒数目分布的转折点,其两侧表现出不同的分布规律;中等颗粒和大颗粒对颗粒总体积有很大贡献。研究结果证实了采用显微CT技术对地下工程防水卷材进行微观研究的可行性,为地下工程防水材料损伤及其耐久性研究提供了一种新的途径。
The microstructure of SBS modified bitumen waterproofing membrane for underground engineering was studied by using X-ray computed tomography (XCT) technique, and the applicability of this technology in microscopic research was discussed. By cutting SBS waterproofing membrane original sample placed on a micro CT system for scanning, to obtain a series of 2D micro-CT slice images with image processing software for 3D image reconstruction and image processing, and finally based on the weight Constructed images for data statistics and analysis. The results show that the parameters of the additive particles can be obtained by analyzing the 3D reconstructed image of the sample, and the lamellar distribution morphology of the sample can be clearly observed; the difference of the material in each region of the sample is large; the equivalent diameter is 60 μm Is a turning point in the distribution of the number of particles, showing a different distribution on both sides; medium and large particles on the total volume of the particles have a significant contribution. The results of the study confirm the feasibility of applying micro-CT technology to the microscopic study of the waterproofing membrane of underground engineering, which provides a new way for the study on the damage and durability of waterproofing materials for underground engineering.