Quantitative In-situ Analysis of Water Transport in Concrete Completed Using X-ray Computed Tomography
Quantitative In-situ Analysis of Water Transport in Concrete Completed Using X-ray Computed Tomography
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DOI：
10.1007/s11242-018-1197-9
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发表时间：
2019-03-01
影响因子：
2.7
通讯作者：
Gollwitzer, Christian
中科院分区：
文献类型：
--
作者：
Oesch, Tyler;Weise, Frank;Gollwitzer, Christian
本文介绍了一种新的方法，定量原位水分测量无跟踪剂使用X射线计算机断层扫描（XCT）。在没有跟踪剂的情况下测量水分所需的高水平灰度精度导致需要额外的图像校准程序，以校正与水相关的X射线散射和现场测试期间出现的与设备可变性相关的伪影。该校准程序是在现有XCT图像校正原理的基础上开发的。由此产生的图像的水分分布表现出与预期的材料行为的高度一致性。这项研究表明，XCT可以成功地用于测量水分前沿运动随着时间的推移和样品内的三维水分分布的变化。这种方法水分测量奠定了基础，计划未来的调查之间的相互作用引起的不同的化学和机械过程和混凝土中的水运输的开裂。
This paper describes a novel methodology for quantitative in-situ moisture measurement without tracking agents using X-ray computed tomography (XCT). The high levels of greyscale precision required for the measurement of moisture without tracking agents resulted in the need for an additional image calibration procedure to correct for water-related X-ray scattering and for equipment-variability-related artefacts arising during in-situ testing. This calibration procedure was developed on the basis of existing principles of XCT image correction. Resulting images of moisture distribution exhibit a high level of agreement with expected material behaviour. This research demonstrated that XCT can be successfully used to measure both moisture front movement over time and changes in 3D moisture distribution within samples. This approach to moisture measurement lays the groundwork for the planned future investigation of the interaction between cracking induced by varying chemical and mechanical processes and water transport in concrete.