A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Strengthening and permeability control in sand using Cr3+-crosslinked xanthan gum biopolymer treatment
https://orcid.org/0000-0002-2148-0766
https://orcid.org/0000-0001-8369-0606
https://orcid.org/0000-0002-3943-0986
https://orcid.org/0000-0001-8582-9237
Highlights Cr-XG treatment enhances soil strength and stiffness with cohesion increase. Bearing capacity increased 466% compared to untreated soil at shallow depth. Hydraulic conductivity reduced by 4 orders of magnitude compared to untreated soil. Durable pore-clogging effect is observed even under increasing hydraulic gradient. Cr-XG gel shows potential as a grouting material for hydraulic barrier construction.
Abstract Trivalent chromium (Cr3+), commonly used in reservoir conformance control, has recently been introduced as an innovative technique for enhancing the strength and durability of Xanthan gum (XG) biopolymer-based soil treatment via Cr3+-induced crosslinking. We investigated the effects of Cr3+-crosslinked XG (Cr-XG) biopolymer treatment on the strength, stiffness and hydraulic conductivity of sand through a comprehensive series of experiments, including unconfined compression, direct shear, constant-head permeability tests, and rheological yield stress measurements. The results revealed that gelation of Cr-XG hydrogel via crosslinking between cation and carboxyl groups in XG, leading to gel stiffening, enhances cohesion within the sand over time. Furthermore, the increased yield stress in the Cr-XG hydrogel, compared to clean XG hydrogel, contributes to a more enduring pore-clogging effect, particularly under elevated hydraulic gradient conditions. The addition of 1% Cr-XG biopolymer to the sand significantly increased the ultimate bearing capacity by 466% and resulted in a four-orders-of-magnitude reduction in hydraulic conductivity, in comparison to untreated sand. This study elucidated the soil strengthening mechanism and efficacy attributed to crosslinking-induced gelation in Cr-XG biopolymer treatment. It effectively addressed limitations inherent in previous biopolymer-soil treatments, thereby accentuating its potential as a rapid grouting material within geotechnical engineering.
Strengthening and permeability control in sand using Cr3+-crosslinked xanthan gum biopolymer treatment
https://orcid.org/0000-0002-2148-0766
https://orcid.org/0000-0001-8369-0606
https://orcid.org/0000-0002-3943-0986
https://orcid.org/0000-0001-8582-9237
Highlights Cr-XG treatment enhances soil strength and stiffness with cohesion increase. Bearing capacity increased 466% compared to untreated soil at shallow depth. Hydraulic conductivity reduced by 4 orders of magnitude compared to untreated soil. Durable pore-clogging effect is observed even under increasing hydraulic gradient. Cr-XG gel shows potential as a grouting material for hydraulic barrier construction.
Abstract Trivalent chromium (Cr3+), commonly used in reservoir conformance control, has recently been introduced as an innovative technique for enhancing the strength and durability of Xanthan gum (XG) biopolymer-based soil treatment via Cr3+-induced crosslinking. We investigated the effects of Cr3+-crosslinked XG (Cr-XG) biopolymer treatment on the strength, stiffness and hydraulic conductivity of sand through a comprehensive series of experiments, including unconfined compression, direct shear, constant-head permeability tests, and rheological yield stress measurements. The results revealed that gelation of Cr-XG hydrogel via crosslinking between cation and carboxyl groups in XG, leading to gel stiffening, enhances cohesion within the sand over time. Furthermore, the increased yield stress in the Cr-XG hydrogel, compared to clean XG hydrogel, contributes to a more enduring pore-clogging effect, particularly under elevated hydraulic gradient conditions. The addition of 1% Cr-XG biopolymer to the sand significantly increased the ultimate bearing capacity by 466% and resulted in a four-orders-of-magnitude reduction in hydraulic conductivity, in comparison to untreated sand. This study elucidated the soil strengthening mechanism and efficacy attributed to crosslinking-induced gelation in Cr-XG biopolymer treatment. It effectively addressed limitations inherent in previous biopolymer-soil treatments, thereby accentuating its potential as a rapid grouting material within geotechnical engineering.
Strengthening and permeability control in sand using Cr3+-crosslinked xanthan gum biopolymer treatment
https://orcid.org/0000-0002-2148-0766
https://orcid.org/0000-0001-8369-0606
https://orcid.org/0000-0002-3943-0986
https://orcid.org/0000-0001-8582-9237
Highlights Cr-XG treatment enhances soil strength and stiffness with cohesion increase. Bearing capacity increased 466% compared to untreated soil at shallow depth. Hydraulic conductivity reduced by 4 orders of magnitude compared to untreated soil. Durable pore-clogging effect is observed even under increasing hydraulic gradient. Cr-XG gel shows potential as a grouting material for hydraulic barrier construction.
Abstract Trivalent chromium (Cr3+), commonly used in reservoir conformance control, has recently been introduced as an innovative technique for enhancing the strength and durability of Xanthan gum (XG) biopolymer-based soil treatment via Cr3+-induced crosslinking. We investigated the effects of Cr3+-crosslinked XG (Cr-XG) biopolymer treatment on the strength, stiffness and hydraulic conductivity of sand through a comprehensive series of experiments, including unconfined compression, direct shear, constant-head permeability tests, and rheological yield stress measurements. The results revealed that gelation of Cr-XG hydrogel via crosslinking between cation and carboxyl groups in XG, leading to gel stiffening, enhances cohesion within the sand over time. Furthermore, the increased yield stress in the Cr-XG hydrogel, compared to clean XG hydrogel, contributes to a more enduring pore-clogging effect, particularly under elevated hydraulic gradient conditions. The addition of 1% Cr-XG biopolymer to the sand significantly increased the ultimate bearing capacity by 466% and resulted in a four-orders-of-magnitude reduction in hydraulic conductivity, in comparison to untreated sand. This study elucidated the soil strengthening mechanism and efficacy attributed to crosslinking-induced gelation in Cr-XG biopolymer treatment. It effectively addressed limitations inherent in previous biopolymer-soil treatments, thereby accentuating its potential as a rapid grouting material within geotechnical engineering.
Strengthening and permeability control in sand using Cr3+-crosslinked xanthan gum biopolymer treatment
Lee, Minhyeong (author) / Chang, Ilhan (author) / Park, Dong-Yeup (author) / Cho, Gye-Chun (author)
2023-09-26
Article (Journal)
Electronic Resource
English
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