Characteristic pore size of nonwoven geotextiles based on low-field nuclear magnetic resonance technology

IF 4.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes Pub Date : 2024-12-24 DOI:10.1016/j.geotexmem.2024.12.005

Xianlei Zhang, Pengpeng Yang, Shaoshuai Ma, Yunyun Wu

引用次数: 0

Abstract

Conventional methods for assessing the pore characteristics of nonwoven geotextiles are plagued by several limitations such as low accuracy and lengthy processing time. Consequently, this paper proposed low-field nuclear magnetic resonance (NMR) technology to acquire the pore size distribution (PSD) curves, porosity, and characteristic pore size (CPS) of nonwoven geotextiles. The T2 characteristic spectrum of vacuum-saturated specimens was obtained from low-field NMR tests, while the pore shape coefficient and surface relaxation rates were determined via scanning electron microscopy (SEM) and X-ray computed tomography (CT) three-dimensional (3D) reconstruction technology. The PSD curves and CPS (O90) values were acquired and compared with results from the wet sieving, dry sieving, and CT digital image methods. The results demonstrate that low-field NMR technology can accurately and efficiently determine the CPS of nonwoven geotextiles.

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基于低场核磁共振技术的非织造土工布孔径特征研究

传统的非织造土工布孔隙特性评估方法存在精度低、加工时间长等局限性。为此，本文提出了利用低场核磁共振（NMR）技术获取非织造土工布的孔径分布（PSD）曲线、孔隙率和特征孔径（CPS）。通过低场核磁共振测试获得真空饱和试样的T2特征谱，通过扫描电子显微镜（SEM）和x射线计算机断层扫描（CT）三维重建技术测定孔隙形状系数和表面弛豫速率。获取PSD曲线和CPS （O90）值，并与湿筛法、干筛法和CT数字图像法的结果进行比较。结果表明，低场核磁共振技术可以准确有效地测定非织造土工布的CPS。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Geotextiles and Geomembranes 地学-地球科学综合

CiteScore

9.50

自引率

21.20%

发文量

111

审稿时长

59 days

期刊介绍： The range of products and their applications has expanded rapidly over the last decade with geotextiles and geomembranes being specified world wide. This rapid growth is paralleled by a virtual explosion of technology. Current reference books and even manufacturers' sponsored publications tend to date very quickly and the need for a vehicle to bring together and discuss the growing body of technology now available has become evident. Geotextiles and Geomembranes fills this need and provides a forum for the dissemination of information amongst research workers, designers, users and manufacturers. By providing a growing fund of information the journal increases general awareness, prompts further research and assists in the establishment of international codes and regulations.