Dear colleagues!
We present to your attention an article on the study of swelling pressure and water permeability of compacted bentonite from the 10th Khutor deposit (Khakassia) — "Swelling Pressure and Permeability of Compacted Bentonite from 10th Khutor Deposit (Russia)".
The full text of the article can be accessed on the website of the journal Minerals via the link.
We present to your attention an article on the study of swelling pressure and water permeability of compacted bentonite from the 10th Khutor deposit (Khakassia) — "Swelling Pressure and Permeability of Compacted Bentonite from 10th Khutor Deposit (Russia)".
The full text of the article can be accessed on the website of the journal Minerals via the link.
Abstract: Bentonites from the 10th Khutor deposit (Republic of Khakassia, Russia) are considered a potential buffer material for isolation of radioactive waste in the crystalline rocks of Yeniseyskiy site (Krasnoyarskiy region). This study presents the results of a series of permeameter experiments with bentonite compacted to dry densities of 1.4, 1.6, and 1.8 g/cm³, saturated and permeated by the artificial groundwater from Yeniseyskiy Site. Permeation was conducted at hydraulic gradients of 180−80,000 m/m to simulate potential hydraulic conditions in the early postclosure phase of a deep geological repository (DGR). The respective swelling pressures of 0.8 ± 0.3, 2.2 ± 0.6, and 6.3 ± 0.3 MPa and permeabilities of (27 ± 15) × 10⁻²⁰, (3.4 ± 0.8) × 10⁻²⁰, and (0.96 ± 0.26) × 10⁻²⁰ m² were observed for the hydraulic gradient of 2000 m/m, which is recommended for the determination of undisturbed swelling pressures and permeabilities in permeameter experiments. Upon incremental increases in the hydraulic gradient, swelling pressures at all densities and permeability at the density of 1.8 g/cm³ remained unchanged, whereas permeabilities at 1.4 and 1.6 g/cm³ decreased overall by a factor of approximately 5 and 1.7, respectively. Seepage-induced consolidation and/or reorganisation of bentonite microstructure are considered possible reasons for these decreases.
Keywords: radioactive waste; bentonite; swelling pressure; permeability; hydraulic gradient; engineered barriers; geological repository
Cite the article: Meleshyn A.Y., Zakusin S.V., Krupskaya V.V. Swelling Pressure and Permeability of Compacted Bentonite from 10th Khutor Deposit (Russia). Minerals, 2021, 11(7), 742.
Keywords: radioactive waste; bentonite; swelling pressure; permeability; hydraulic gradient; engineered barriers; geological repository
Cite the article: Meleshyn A.Y., Zakusin S.V., Krupskaya V.V. Swelling Pressure and Permeability of Compacted Bentonite from 10th Khutor Deposit (Russia). Minerals, 2021, 11(7), 742.