基于显微CT的地下工程SBS防水卷材微观研究  

Microcosmic Study on SBS Waterproof Sheet in Underground Engineering Based on Micro-CT Technology

作　　者：王庆国[1,2] 杨其新[1,2] 蒋雅君[1,2] 杨娟[1,2] Gu Allen 

机构地区：[1]西南交通大学交通隧道工程教育部重点实验室,成都610031 [2]西南交通大学土木工程学院,成都610031 [3]卡尔蔡司X射线显微镜公司,加利福尼亚普莱森顿94588

出　　处：《地下空间与工程学报》2016年第1期281-286,共6页Chinese Journal of Underground Space and Engineering

基　　金：国家自然科学基金(51178401);国家自然科学基金青年科学基金(51108385);国家重点基础研究发展计划(973计划)(2010CB732105)

摘　　要：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 asphalt waterproof sheet in underground engineering was studied by using X-ray computed tomography,and the applicability of the technology in microcosmic study was discussed. Original sample was cut from SBS waterproof sheet and it was scanned with micro-CT. A series of 2D slices were acquired,and the 3D images were reconstructed based on the slices and processed with image processing software. Data statistics and analysis were made on the images. The results show that the relevant parameters of additive particles can be obtained by analyzing 3D reconstructed images of the sample,and the layer structure appearing in the sample can be also observed clearly. The difference among various regions in the sample is great. The equivalent diameter 60 μm is a turning point in the number distribution of the particles,and the distribution law in one side is different from that in the other. Middle and large particles contribute enormously to the total volume of the particles. It is feasible to conduct the microcosmic study on waterproof sheet in underground engineering by using micro-CT technology,which provides a new approach for the study on damage and durability of waterproof material in underground engineering.

关 键 词：地下工程 防水卷材 微观研究 显微CT 等效直径 

分 类 号：TU57[建筑科学—建筑技术科学]