Estimation of water content of compacted Kunigel-V1 bentonite using near-infrared spectra

IF 3.3 2区工程技术 Q2 ENGINEERING, GEOLOGICAL

Soils and Foundations Pub Date : 2025-02-01 DOI:10.1016/j.sandf.2024.101545

Sota Murase , Te Ma , Kunlin Ruan , Daichi Ito , Hailong Wang , Hideo Komine

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引用次数: 0

Abstract

Bentonite has been selected as a candidate buffer material for the deep geological disposal of high-level radioactive waste (HLW). To more effectively control the compaction quality of bentonite blocks, an efficient and accurate method for estimating the water content of compacted bentonite should be developed. A method for estimating the water content of compacted bentonite using near-infrared spectroscopy is proposed in this study. The near-infrared spectra of 60 compacted Kunigel-V1 (KV1) bentonite specimens, with varying water contents and compaction loads, were measured using a near-infrared spectral sensor. Based on the obtained experimental data, a calibration model was constructed through partial least squares (PLS) regression, and its accuracy was evaluated by means of several indicators. The results demonstrated that the calibration model could achieve an estimation accuracy of approximately ± 1.0 %, regardless of the compaction load. These findings confirm the applicability of using near-infrared spectroscopy for estimating the water content of compacted Kunigel-V1 bentonite.

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来源期刊

Soils and Foundations 工程技术-地球科学综合

CiteScore

6.40

自引率

8.10%

发文量

审稿时长

5 months

期刊介绍： Soils and Foundations is one of the leading journals in the field of soil mechanics and geotechnical engineering. It is the official journal of the Japanese Geotechnical Society (JGS)., The journal publishes a variety of original research paper, technical reports, technical notes, as well as the state-of-the-art reports upon invitation by the Editor, in the fields of soil and rock mechanics, geotechnical engineering, and environmental geotechnics. Since the publication of Volume 1, No.1 issue in June 1960, Soils and Foundations will celebrate the 60th anniversary in the year of 2020. Soils and Foundations welcomes theoretical as well as practical work associated with the aforementioned field(s). Case studies that describe the original and interdisciplinary work applicable to geotechnical engineering are particularly encouraged. Discussions to each of the published articles are also welcomed in order to provide an avenue in which opinions of peers may be fed back or exchanged. In providing latest expertise on a specific topic, one issue out of six per year on average was allocated to include selected papers from the International Symposia which were held in Japan as well as overseas.