Bentonite has two types of sodium and calcium, where sodium bentonite was used in this study due to extensive applications used in cases in the field and the high swelling capacity of sodium ...
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This result was observed only for highly compacted bentonite or the S/B mixture prepared at a high bentonite content (Agus & Schanz, 2005; Delage et al., 2006;Seiphoori et al., 2014); in the ...
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The hydration performance of GCL can be influenced from several factors one of which is bentonite mass per unit area (MPUA). This study reports the hydration and hydraulic conductivity of a GCL ...
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Download scientific diagram | The surface area and particle size analysis of bentonite. from publication: Adsorption of Toxic Ni (II) from an Aqueous Solution by Bentonite | In this study, the ...
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Na-bentonite (A2.5) obtained by soda activation was treated with 3 g CaCl2 / 100 g bentonite and converted to Ca-bentonite again. The products were investigated by chemical analysis, X-ray ...
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Bentonite chips come in two basic size ranges - 1/4 to 3/8-inch, and 1/2- to 3/4-inch chips. The 1/4- to 3/8-inch chips should be used for 4-inch diameter wells. ... The final touches of a decommissioning. Recommended procedures when using chipped bentonite: 1) Determine the construction details of the well or drillhole. At minimum, you need to ...
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Several laboratory and in situ tests were conducted to investigate the packing behaviors of bentonite pellet mixtures [[15], [16], [17]]. Preliminary results show that binary-size mixtures (composed of two size classes) can be compacted to higher packing dry densities than mono-size mixtures (composed of one size class) do.
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Several nuclear waste disposal concept designs take advantage of bentonite based materials to seal underground galleries and shafts. Safety assessment and long-term predictions of the material behaviour have been the main objective of a number of experimental campaigns and of constitutive models development. All these studies have underlined that the multi …
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Calcium bentonite. In contrast with sodium bentonite, the main characteristic of calcium bentonite is not that of a water absorbent material. Instead, its main trait is the adsorption (binding) of ionic particles — such as trace minerals, but also some mycotoxins. Thus, using calcium bentonite is a delicate exercise.
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Blood was collected 1 h before feeding experimental diets and from 20 to 240 min after feeding experimental diets at 20-min intervals with a final blood collection at 480 min to determine plasma ...
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The difference between initial and final cadmium and copper concentrations was assumed to be the amount adsorbed by bentonite. ... 2005; APPEL; MA, 2002; NAIDU et al., 1997; SOARES et al., 2009 ...
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The effect of the initial water content on the final swelling strain is less important for the low dry densities and the high vertical loads, becoming negligible for vertical loads close to the swelling pressure. ... to have a uniform distribution the targeted particle size of commercial bentonite is below 75 lm. Dry sieving resulted in a ...
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During January 2014, Norway experienced unusually cold and dry weather conditions leading to very low indoor relative humidity (RH) in inhabited (heated) wooden homes.
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The extent of the joint's healing is related primarily to the type of joint (as shown in Fig. 2), the type of compacted bentonite blocks, the infiltration fluid's chemical properties (Pekala et al., 2021; Sun et al., 2024), and the joint's sealing material.Numerous research results have shown that the joint area may close eventually as the hydrated bentonite blocks expand when …
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Bentonite has been selected as one of the candidate buffer/backfill materials for the construction of high-level radioactive waste (HLW) repository due to its low permeability, high swelling and favorable radionuclide retardation capacities [1].In the Swedish SKB-3 concept [2], for example, highly compacted blocks of bentonite or bentonite-based materials were used to …
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The filling characteristics of rockfill is an engineering problem that cannot be ignored in high dams. Reasonably controlling and optimizing the gradation is critical for improving the compaction ...
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To this end, the paper presents a comparative investigation on water retention behaviors of Gaomiaozi (GMZ) BG specimens prepared with different grading curves and void …
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bentonite compacted blocks in the past (Wang et al., 2013 among many), investigations on high density bentonite pellets combined with powdered bentonite are gaining increasing interest (Molinero et al., 2017), (Dard´e et al., 2018)(Liu et al., 2019; Liu et al., 2020a; Liu et al.,
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the full-scale PSD of GMZ bentonite, which is the key to estimation of the sealing ability of bentonite buffer. Ó 2020 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences.
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Mainly due to sample density, the pore structure was noticeably different for the Na form of purified bentonite at 0.7 g cm –3 density, but at higher degrees of compaction, no significant …
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Waste glass beads with two different grains size distributions (fine and coarse) were added to the bentonite at the ratios of 0%, 10%, 20%, 30%, and 40% by dry weight.
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The time taken for 50% of the active ingredient to be released into water, t(50), was longer for those formulations containing natural bentonite (6.1 h) or acid-treated bentonite (9.0 and 11.7 h ...
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The effect of the initial water content on the final swelling strain is less important for the low dry densities and the high vertical loads, becoming negligible for vertical loads close to the swelling pressure. ... to have a uniform distribution the targeted particle size of commercial bentonite is below 75 lm. Dry sieving resulted in a ...
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Kinetics of Bentonite Systems Using Particle Size Analysis, Journal of Dispersion Science and Technology, DOI: 10.1080/01932691.2019.1612758 To link to this article: https://doi.or g/10.1080 ...
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This study aims to investigate the effects of specimen size and loading rate on the mechanical property of Bentonil-WRK bentonite buffer material for engineered barrier system.
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As the buffer/backfill material for geological disposal of high-level radioactive waste, the sealing performance of compacted bentonite is affected by its volume deformation characteristics.
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Zinc adsorption in bentonite clay depended on pH and particle size, decreasing as they increased. The maximum retention capacity, 3.24 mg g-1, was obtained in pH 4 using particle size of bentonite ...
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A mixture of the MX80 bentonite and the Callovo-Oxfordian (COx) claystone were investigated by carrying out a series of experiments including determination of the swelling pressure of compacted ...
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2 FINAL PHYSICAL STATE OF THE BENTONITE BARRIER OF THE FEBEX IN SITU 3 TEST 4 Author 1 ... 99 gently dried to a water content of around 14%, all the material of particle size greater than 5 mm
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A wide range of aspects related to the thermal-hydraulic-mechanical-chemical processes of bentonite have been studied, including high temperature influences on bentonite performance [9][10][11][12 ...
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