Effect of Biopolymeric Stabilization on the Strength and Compressibility Characteristics of Cohesive Soil

Vydehi, Kopparthi Venkata; Moghal, Arif Ali Baig

doi:10.1061/(asce)mt.1943-5533.0004068

Cited by 60 publications

(30 citation statements)

References 53 publications

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“…That the carrageenantreated soil having a greater change in the void ratio than the untreated soil is not unexpected, due to the repulsion force between the excessive hydroxyl group of carrageenan and negatively charged clay particles. The similar phenomenon has been reported for other hydrophilic biopolymers like xanthan gum and guar gum [14,15,48,76]. By contrast, casein molecules are linked by hydrophobic and electrostatic bonds to form sub-micelles which are further associated together by calcium phosphate to form casein micelles.…”

Section: Relationship Between Void Ratio and Vertical Stresssupporting

confidence: 83%

“…The clayey soil was oven-dried, pulverized, and sieved using a 2-mm sieve prior to use. In the previous studies, two different mixing methods for sample preparation have been used in the laboratory: dry mixing in which the biopolymer powder is directly mixed with the dry soil before adding water [52,56,64,76] and wet mixing in which the biopolymer powder is first mixed with water to form a gel before mixing in the dry soil [6,7,25,47]. According to Chang et al [21], for a relatively high biopolymer-to-water ratio (e.g.…”

Section: Sample Preparationmentioning

confidence: 99%

“…Biopolymers with high strengthening efficiency and low environmental impact have been gaining increasing credence in sustainable geotechnical engineering practices [6,21,22,29,30,54,61]. Biopolymers have the potential to be used either as soil binders for ground improvement [16,17,47,64,76] or as additives applied to soil-based construction members [1,56,58], to improve soil performances like strength, deformation, and durability.…”

Section: Introductionmentioning

confidence: 99%

“…There are mainly three factors influencing the efficiency of biopolymers in soil strength reinforcement, namely biopolymer type, blending content, and moisture condition. If based on the physiochemical inter-particle reactions, biopolymers with surface charges are more likely to bind directly to clay particles via ionic and hydrogen bonds [16,17,21,64,76]. In addition, biopolymers that contain more functional groups and heavier molecular weight tend to have greater hydrogel viscosity and denser structure, hence showing better soil stabilizing effect [22,23,29,47].…”

Section: Introductionmentioning

confidence: 99%

“…Previous one-dimensional consolidation test results indicated that hydrophilic biopolymers (e.g. xanthan gum and guar gum) tend to increase the soil compressibility [14,15,48,76]. Since compressibility is one of the most important soil reinforcement measurements in geotechnical engineering design [39,40,63]; further studies need to be conducted for obtaining a better understanding of the impact of different types of biopolymers on soil compressibility.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical and biodeterioration behaviours of a clayey soil strengthened with combined carrageenan and casein

Geng

2022

Acta Geotech.

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In the last decade, biopolymers have been used as organic soil binders in ground improvement and earthen construction material modification. Although biopolymer-treated soils have substantially enhanced mechanical strength, the deformation characteristics under external loads and material durability (e.g. biodeterioration due to microbial activity) have not yet been fully understood, which limits the in situ practical application of the biopolymer-based soil treatment technology. This study investigated the efficiency of combined carrageenan and casein in strengthening a clayey soil with the biodeterioration consideration. Both mechanical tests (e.g. unconfined compressive strength and one-dimensional consolidation) and biological tests (e.g. high throughput sequencing and rating of mould growth) were conducted. Results indicated that the usage of the carrageenan–casein mixture induced a higher soil compressive strength compared with either carrageen or casein, due to the formation of a three-dimensional gel network. In addition, carrageenan–casein mixture and casein decreased the compressibility of the clayey soil, which might be attributed to the casein’s peculiarity of self-associating into micelles, leading to minimal interactions with water molecules. Carrageenan, due to its affinity for water, increased the soil compressibility. Under the impact of microbial activity, the biopolymer-treated soils underwent deterioration in both surface appearance (i.e. coloured stains and patches caused by mould growth) and compressive strength. A linear relationship was proposed, in which a reduction in compressive strength by approximately 11% is expected while the rating of mould growth is increased by one in a five-rating system. The current research demonstrates that the soil reinforcement with combined carrageenan and casein is able to improve both soil strength and deformation behaviours. It is also suggested to take into account the biodeterioration considerations in the design and implementation of biopolymer-based soil reinforcement practices.

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Section: Relationship Between Void Ratio and Vertical Stresssupporting

confidence: 83%

Section: Sample Preparationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Mechanical and biodeterioration behaviours of a clayey soil strengthened with combined carrageenan and casein

Geng

2022

Acta Geotech.

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Xanthan gum modification to surface and interfacial properties between soil‐based matrixes and petroleum oils to minimize soil pollution

Ahmed,

Hutton‐Prager

2024

Applied Research

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A novel approach exploiting surfaces and interfaces between liquid oils and porous soil media was used to investigate the role of xanthan gum (XG) in minimizing the spread of petroleum oil spills on land. 1.6 wt% XG added to soil‐based mixture matrixes (topsoil, sand, clay, and moisture) resulted in a 50% reduction in oil spreading area at 0 and 5 wt% moisture content, at 1.3 cm depth of soil matrix. Also recorded was a 45% increase in time taken for the low‐ and medium‐viscosity oils to penetrate this soil depth. XG alters the surface energy and roughness of the soil matrixes, which additionally contributes to a reduction in oil spreading capabilities. Interfacial phenomena between individual oil droplets and soil matrixes demonstrated variable findings of droplet spreading and penetration with XG, depending upon the heterogeneity of the soil matrix itself. XG assisted a reduced lateral spread in heterogeneous soil matrixes and a reduced vertical penetration in clay‐based matrixes. These interfacial results highlighted the often‐observed differing transport phenomena at the interface compared with the bulk. This initial study demonstrates a novel approach to incorporate surface energy phenomena into the suite of soil remediation efforts by introducing natural biopolymers in high‐risk land oil‐spill areas to slow oil contaminant spread. Future studies will further characterize the benefits of XG in containing oil flow.

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Effect of Biopolymer Inclusion and Curing Conditions on the Failure Strain and Elastic Modulus of Cohesive Soil

Vydehi¹,

Moghal²

2022

Lecture Notes in Civil Engineering

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Effect of Biopolymeric Stabilization on the Strength and Compressibility Characteristics of Cohesive Soil

Cited by 60 publications

References 53 publications

Mechanical and biodeterioration behaviours of a clayey soil strengthened with combined carrageenan and casein

Mechanical and biodeterioration behaviours of a clayey soil strengthened with combined carrageenan and casein

Xanthan gum modification to surface and interfacial properties between soil‐based matrixes and petroleum oils to minimize soil pollution

Effect of Biopolymer Inclusion and Curing Conditions on the Failure Strain and Elastic Modulus of Cohesive Soil

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