Assessment of membrane and diffusion behavior of soil-bentonite slurry trench wall backfill consisted of sand and Xanthan gum amended bentonite

Ni, Hao; Shen, Sheng-Qiang; Fu, Xiaonan; Wang, Changming; Du, Yao

doi:10.1016/j.jclepro.2022.132779

Cited by 16 publications

(2 citation statements)

References 49 publications

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“…Recent studies have shown that biopolymer modifiers produced by bacterial and microbial fermentation can be used to stabilize soil. Xanthan gum mainly forms a helical structure and can exhibit high stability over various temperatures, pH values, and electrolyte concentrations [63,64]. β-glucan is found in cellulose and the cell walls of various fungi or bacteria and can be used with other biopolymer modifiers to improve soil properties [65].…”

Section: Scleroglucanmentioning

confidence: 99%

A State-of-the-Art Review of Organic Polymer Modifiers for Slope Eco-Engineering

Wang

Yao

et al. 2023

Polymers

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In slope ecological restoration projects, reinforcing soil and promoting vegetation growth are essential measures. Guest soil spraying technology can be used to backfill modified soil and vegetation seeds onto the slope surface, resulting in successful ecological restoration. The use of organic polymer modifiers to reinforce soil has several benefits, such as high strength, effective results, and low pollution levels. Organic polymer soil modifiers can be divided into two categories: synthetic polymer modifiers and biopolymer modifiers. This paper provides a thorough review of the properties and interaction mechanisms of two types of polymer modifiers in soil consolidation. The properties of organic polymer modifiers make them applicable in soil and vegetation engineering on slopes. These modifiers can enhance soil mechanics, infiltration, and erosion resistance and promote vegetation growth. Therefore, the suitability of organic polymer modifiers for soil and vegetation engineering on slopes is demonstrated by their properties and potential for improvement in key areas. Furthermore, challenges and future prospects for slope protection technology using organic polymer modifiers are suggested.

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Section: Scleroglucanmentioning

confidence: 99%

A State-of-the-Art Review of Organic Polymer Modifiers for Slope Eco-Engineering

Wang

Yao

et al. 2023

Polymers

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“…The hydraulic conductivity of ordinary SB backfills consisting of sand and CB dramatically increased when exposed to landfill leachate-impacted groundwater and heavy-metal-impacted groundwater [17,20]. Previous studies indicated that superabsorbent hydrogel additives with high water absorption capacity could reduce the hydraulic conductivity and enhance the pollutant containment of bentonite-based engineered barrier materials [21][22][23]. A hydrophilic polymer such as cross-linked superabsorbent polymer (SAP) as an internal curing material was found to be able to reduce the autogenous shrinkage and change the pore size distribution and mechanical properties of cement-based materials [24,25].…”

Section: Introductionmentioning

confidence: 99%

Engineering Properties of Novel Vertical Cutoff Wall Backfills Composed of Alkali-Activated Slag, Polymer-Amended Bentonite and Sand

Jiang

Shi

et al. 2023

Polymers

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The workability, hydraulic conductivity, and mechanical properties are essential to contaminant containment performance of cementitious backfills in vertical cutoff walls at contaminated sites. This study aims to investigate the engineering properties of a novel vertical cutoff wall backfill composed of reactive magnesia (MgO)-activated ground granulated blast furnace slag (GGBS), sodium-activated calcium bentonite amended with polyacrylamide cellulose (PAC), and clean sand (referred to as MSBS-PAC). Backfills composed of MgO-activated GGBS, sodium-activated calcium bentonite, and clean sand (referred to as MSBS) were also tested for comparison purposes. A series of tests were conducted which included slump test, flexible-wall hydraulic conductivity test, and unconfined compression test. The pore size distributions of two types of backfills were investigated via the nuclear magnetic resonance (NMR) technique. The results showed the moisture content corresponding to the target slump height was higher for MSBS-PAC backfill than that for MSBS backfill. The MSBS-PAC backfill possessed lower pH, dry density, and higher void ratio at different standard curing times as compared to MSBS backfill. The unconfined compressive strength and strain at failure of the MSBS-PAC backfill were noticeable lower than those of the MSBS backfill. In contrast, the hydraulic conductivity of MSBS-PAC backfill was approximately one order of magnitude lower than that of the MSBS backfill, which was less than 10−9 m/s after 28-day and 90-day curing. Lower hydraulic conductivity of MSBS-PAC backfill was attributed to the improvement of pore structure and pore fluid environment by PAC amendment.

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Effects of ionic strength and bentonite ratio on the migration of Cr(VI) in clayey soil-bentonite engineered barrier

Zhu,

He,

et al. 2024

Environ Sci Pollut Res

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Assessment of membrane and diffusion behavior of soil-bentonite slurry trench wall backfill consisted of sand and Xanthan gum amended bentonite

Cited by 16 publications

References 49 publications

A State-of-the-Art Review of Organic Polymer Modifiers for Slope Eco-Engineering

A State-of-the-Art Review of Organic Polymer Modifiers for Slope Eco-Engineering

Engineering Properties of Novel Vertical Cutoff Wall Backfills Composed of Alkali-Activated Slag, Polymer-Amended Bentonite and Sand

Effects of ionic strength and bentonite ratio on the migration of Cr(VI) in clayey soil-bentonite engineered barrier

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