Compressibility Characteristics of Guar Gum-Treated Expansive Soil

Vydehi, Kopparthi Venkata; Moghal, Arif Ali Baig

doi:10.1007/978-981-16-1831-4_31

Cited by 2 publications

(3 citation statements)

References 15 publications

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“…All of the biopolymer-amended samples followed the same trend as the unamended soil and showed closely matching values for C c (0.31 ± 0.02) and C s (0.08 ± 0.01). These ranges are similar to those observed by [29][30][31]55] and indicate that the effect of the biopolymer amendment on the consolidation parameters of the investigated expansive soil is negligible. This is because loading cancels the effect of the void ratio increase irrespective of the singular or dual porosity of the soil.…”

Section: Resultssupporting

confidence: 86%

“…However, k s is also reported to increase for highly plastic clay from Hong Kong by one order of magnitude (from 1.2 × 10 −9 m/s to 1.3 × 10 −8 m/s) for 20% anionic biochar [28]. In a similar way, the compression index (C c ) and the swell index (C s ) have shown changes for lean clays (Shanghai, China, and Warangal, India) by ±0.06 and ±0.04 when amended with 0.5-4% charge-neutral guar gum as well as anionic xanthan gum and a 1-4% mixture of anionic carrageenan and charge-neutral casein, respectively [29][30][31]. These improvements are material-specific and as such should be extended to the local expansive soil that severely affects the construction and maintenance of civil infrastructure in the region.…”

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confidence: 74%

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Flow through and Volume Change Behavior of a Compacted Expansive Soil Amended with Natural Biopolymers

Bukhary,

Azam

2024

Geotechnics

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Natural biopolymers offer a sustainable alternative for improving soil behavior due to their inert nature, small dosage requirement, and applicability under ambient temperatures. This research evaluates the efficacy of natural biopolymers for ameliorating an expansive soil by using a 0.5% dosage of cationic chitosan, charge-neutral guar gum, and anionic xanthan gum during compaction. The results of laboratory investigations indicate that the flow through and volume change properties of the expansive soil were affected variably. The dual porosity, characterized by low air entry due to inter-aggregate pores (AEV1 of 4 kPa) and high air entry due to the clay matrix (AEV2 of 200 kPa) of the soil, was healed using chitosan and guar gum (AEV of 200 kPa) but was enhanced by the xanthan gum (AEV1 of 100 kPa and AEV2 of 200 kPa). The s-shaped swell–shrink path of the soil comprised structural (e from 1.23 to 1.11), normal (e from 1.11 to 0.6), and residual stages (e ranged from 0.6–0.43). This shape was converted into a j-shaped path through amendment using chitosan and guar gum, showing no structural volume change, with e from about 1.25 to 0.5, but was reverted to a more pronounced form by xanthan gum, with e from 1.5 to 1.32, 1.32 to 0.49, and 0.49 to 0.34 in the three stages, respectively. The consolidation behavior of the soil was largely unaffected by the addition of biopolymers such that the saturated hydraulic conductivity decreased from 10−9 m/s to 10−12 m/s over a void ratio decrease from 1.1 to 0.6. At a seating stress of 5 kPa, the swelling potential (7.8%) of the soil slightly decreased to 6.9% due to the addition of chitosan but increased to 9.4% and 12.2% with guar gum and xanthan gum, respectively. The use of chitosan and guar gum will allow the compaction of the investigated expansive soil on the dry side of optimum.

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Section: Resultssupporting

confidence: 86%

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confidence: 74%

Flow through and Volume Change Behavior of a Compacted Expansive Soil Amended with Natural Biopolymers

Bukhary,

Azam

2024

Geotechnics

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“…It was concluded in Taguchi analysis that CMC had better performance in comparison with xanthan gum and guar gum and has a promising potential as an alternative material for dust control. 10) (Vydehi & Moghal, 2022) In this study, experiments were performed for the stabilisation of lean clay collected from the NIT Warangal campus with Guar Gum biopolymer at varying dosages of 0.5%, 1.0%, 1.5%, 2.0% and 2.5% by dry weight of soil. It was observed that with the increase in dosage of GG, liquid limit and plasticity index values increased and it was attributed to increase in viscosity of the solution of biopolymer.…”

Section: IImentioning

confidence: 99%

Stabilization of Soil Using Guar Gum Biopolymer

Yogeshwar,

Sonthwal

2023

IJRASET

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Soil stabilization in a broader sense refers to various methods and techniques employed to improve the geotechnical properties of a problematic soil to enhance its load bearing capacity. Many materials like cement, lime, bitumen etc. are employed to improve the properties but they are not ecofriendly as such. In this study, an effort has been made to study the effect of natural occurring polymer, Guar Gum to improve the mechanical properties of soil rich in clayey minerals. This biopolymer is biodegradable in nature and have less carbon footprint than other conventional materials. Five different varying proportion (0.5%, 1.0%, 1.75%, 2.50% and 3.25%) of Guar Gum with soil has been used to find the optimum dosage required for stabilization. Three major properties like Optimum Moisture Content -Maximum Dry Density relation, California Bearing Ratio Test (both unsoaked and soaked) and Unconfined Compressive Strength Test were studied on the soil and mixes. From the results it was concluded that soil with 1% Guar Gum has shown maximum improvement in the geotechnical properties of soil.

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Compressibility Characteristics of Guar Gum-Treated Expansive Soil

Cited by 2 publications

References 15 publications

Flow through and Volume Change Behavior of a Compacted Expansive Soil Amended with Natural Biopolymers

Flow through and Volume Change Behavior of a Compacted Expansive Soil Amended with Natural Biopolymers

Stabilization of Soil Using Guar Gum Biopolymer

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