Thermal-Mechanical Behavior of Compacted GMZ Bentonite

Cui, Yu‐Jun; Tang, Anh Minh; Qian, Lixin; Ye, Weimin; Bao, Changchun

doi:10.3208/sandf.51.1065

Cited by 74 publications

(12 citation statements)

References 23 publications

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“…The pellets and pellet/powder mixtures of two other bentonite materials, FoCa (France) and GMZ (China), have been used as either buffer or gap-filling materials in the RESEAL project [4] and mock-up tests in China [15], respectively. The basic properties of these materials are presented in Table 1 [16].…”

Section: Granulated Bentonite Mixtures (Gbm)mentioning

confidence: 99%

Properties of Granulated Bentonite Mixtures for Radioactive Waste Disposal: A Review

Nazir¹

2021

GEOMATE

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Bentonite has long been considered as a potential sealing material in engineered barrier systems (EBS) for the geological disposal of radioactive waste due to its favorable physical and chemical properties. In some disposal concepts, the research evolution has led to the adaption of granulated bentonite mixtures (GBM) as a candidate buffer/backfill material owing to its high compaction properties, operational advantages, and ability to close gaps between the seal and host rock. A thorough understanding of the behavior of GBM is essential for proper design and construction of an efficient repository. As compared to compacted bentonite blocks, studies on GBM are somewhat limited. Thus, a review of former experimental studies conducted on GBM over the past two decades was performed. The topics included compaction properties, thermo-hydromechanical properties, gas transport, and microstructure. This work comprises a summary table listing material properties, sample scale, methodology, test conditions, and graphical representation of results. Based on the review, prospects for further investigations/studies have also been recommended to understand the behavior of GBM.

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Section: Granulated Bentonite Mixtures (Gbm)mentioning

confidence: 99%

Properties of Granulated Bentonite Mixtures for Radioactive Waste Disposal: A Review

Nazir¹

2021

GEOMATE

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“…Investigations on the mineral composition, swelling property, soil-water characteristic and hydraulic conductivity of GMZ bentonite have been receiving more and more attentions (Cui et al, 2011;Chen et al, 2012aChen et al, , 2012bChen et al, , 2013Chen et al, , 2014Liu et al, 2001;Ye et al, 2009Ye et al, , 2010Ye et al, , 2012Ye et al, , 2014Zhu et al, , 2015. For the compacted GMZ01 bentonite specimens, it was found that the swelling pressure decreases and the hydraulic conductivity increases with the increasing concentration of infiltrating solutions.…”

Section: Introductionmentioning

confidence: 95%

Swelling pressure and hydraulic conductivity of compacted GMZ01 bentonite under salinization–desalinization cycle conditions

Chen

Zhu

et al. 2015

Applied Clay Science

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“…Croft and Nettleton (1962) reported that cement could hydrate normally in clay minerals, kaolinite and illite consumed little calcium hydroxide (Ca(OH) 2 , CH) and the strength of the stabilized soil made of the soil mainly composed of them was higher, while montmorillonite consumed more CH and the strength of the stabilized soil made of the soil mainly composed of it was lower. Cui et al (2011) reported that the higher the montmorillonite content in bentonite, the higher was the soil's cation exchange capacity (CEC). Saitoh and Suzuki (1986) reported that cement hydration mainly produced the calcium silicate hydrate (C-S-H) and CH.…”

Section: Introductionmentioning

confidence: 99%

Effect of cation exchange capacity of soil on stabilized soil strength

Huang

Ning

et al. 2014

Soils and Foundations

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While a certain correlation between the cation exchange capacity (CEC) of the soil and the strength of the cement stabilized soil has been reported, the mechanism remains unclear. In this research, a set of soil samples with different CECs were stabilized with different proportions of cement and calcium hydroxide (Ca(OH) 2 , CH). The influence of soil CEC on the strength of the stabilized soil was investigated by analyzing the CH saturation in the pore solution and measuring the strength of the stabilized soil specimens. It is revealed that cation exchange in the soil can reduce the CH saturation of the stabilized soil. If the CEC of the soil is too high, the CH in the pore solution of the stabilized soil cannot reach the saturation level, and further cation exchange would then consume the Ca 2 þ ions which should be originally used to generate calcium silicate hydrate, thus result in the poor strength of the stabilized soil.

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Thermal-Mechanical Behavior of Compacted GMZ Bentonite

Cited by 74 publications

References 23 publications

Properties of Granulated Bentonite Mixtures for Radioactive Waste Disposal: A Review

Properties of Granulated Bentonite Mixtures for Radioactive Waste Disposal: A Review

Swelling pressure and hydraulic conductivity of compacted GMZ01 bentonite under salinization–desalinization cycle conditions

Effect of cation exchange capacity of soil on stabilized soil strength

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