Role of composition and fabric of Kuttanad clay: a geotechnical perspective

Suganya, K.; Sivapullaiah, P. V.

doi:10.1007/s10064-016-0911-5

Cited by 11 publications

(4 citation statements)

References 27 publications

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Section: Introductionmentioning

confidence: 87%

“…Several studies in the past have established the presence of organic matter in the deposits found in the Kuttanad region [20,21]. The studies have confirmed the presence of montmorillonite, hydromica, kaolinite, quartz, and possibly traces of gibbsite, chlorite, feldspar, and amphibole in the soil [21]. From a geotechnical standpoint, these clays are unfavorable due to their high compressibility, low shear strength, high permeability, and high proportion of organic content [22].…”

Section: Introductionmentioning

confidence: 92%

“…Other techniques attempted to stabilize and mitigate the vulnerability of these deposits comprise the precompression techniques [25], stone columns [26], lime columns [27], and fiber reinforcement [28]. Amendments with lime, fly ash [29], and cement [21] have also modified the engineering properties of Kuttanad soil considerably.…”

Section: Introductionmentioning

confidence: 99%

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Shrinkage and Consolidation Characteristics of Chitosan-Amended Soft Soil—A Sustainable Alternate Landfill Liner Material

Rasheed,

Moghal,

Jannepally

et al. 2023

Buildings

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Kuttanad is a region that lies in the southwest part of Kerala, India, and possesses soft soil, which imposes constraints on many civil engineering applications owing to low shear strength and high compressibility. Chemical stabilizers such as cement and lime have been extensively utilized in the past to address compressibility issues. However, future civilizations will be extremely dependent on the development of sustainable materials and practices such as the use of bio-enzymes, calcite precipitation methods, and biological materials as a result of escalating environmental concerns due to carbon emissions of conventional stabilizers. One such alternative is the utilization of biopolymers. The current study investigates the effect of chitosan (biopolymer extracted from shrimp shells) in improving the consolidation and shrinkage characteristics of these soft soils. The dosages adopted are 0.5%, 1%, 2%, and 4%. One-dimensional fixed ring consolidation tests indicate that consolidation characteristics are improved upon the addition of chitosan up to an optimum dosage of 2%. The coefficient of consolidation increases up to seven times that of untreated soil, indicating the acceleration of the consolidation process by incorporating chitosan. The shrinkage potential is reduced by 11% after amendment with 4% chitosan and all the treated samples exhibit zero signs of curling. Based on the findings from consolidation and shrinkage data, carbon emission assessments are carried out for a typical landfill liner amended with an optimum dosage of chitosan. In comparison to conventional stabilizers like cement and lime, the results indicate that chitosan minimized carbon emissions by 7.325 times and 8.754 times, respectively.

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Section: Introductionmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 92%

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Shrinkage and Consolidation Characteristics of Chitosan-Amended Soft Soil—A Sustainable Alternate Landfill Liner Material

Rasheed,

Moghal,

Jannepally

et al. 2023

Buildings

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“…The resistance to moisture attack of polymer-stabilized soils is a matter that should be addressed, especially in the region of Kuttanad (Suganya and Sivapullaiah, 2015;Suganya and Sivapullaiah, 2017). Improving the durability against moisture of polymer-modified soil will significantly increase the stability of polymer-stabilized soils and eventually diminish the infrastructure's long-term maintenance cost.…”

Section: Introductionmentioning

confidence: 99%

Sustainable assessment and carbon footprint analysis of polysaccharide biopolymer-amended soft soil as an alternate material to canal lining

Rasheed,

Moghal,

Rambabu

et al. 2023

Front. Environ. Sci.

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Kuttanad region in Kerala, India, is a place that predominantly consists of soft soil formations with low shear strength and low water resistance rendering them problematic for construction purposes. Pavements constructed on such soft deposits have been subjected to structural rutting and the high erodibility of the in-situ soil necessitates the need to use suitable ground improvement techniques. The present environmental scenario demands the implementation of sustainable techniques for ground rejuvenation and effective stabilizers for enhancing engineering properties. This study investigates the amelioration of Kuttanad soft soil using chitosan as a soil amendment to improve its durability and erodibility characteristics. The untreated and chitosan-treated samples were exposed to 5 h of wetting cycle followed by 43 h of drying cycles until their failure. The unconfined compressive strength (UCS) of samples prepared with different dosages (0.5, 2, 4%) and cured for 14, 28, 60, and 90 days was evaluated at the onset and after each drying cycle to measure their durability index. Kuttanad soil was amended with 2% and cured for 90 days withstood five cycles with a UCS of more than 1,000 kPa. The drip erosion tests were used to check the erodibility performance for the aforementioned different dosages and curing periods. The 2% and 4% chitosan amended samples resisted the entire test duration of 10 min indicating the highest water erosion resistance. The findings of the current study evaluated through durability and erosion tests reinforced the effectiveness of chitosan as an effective biopolymer for soft soils subjected to constant water attack and can be easily implemented in places with such vulnerability. A typical earthen canal lining amended with chitosan reduced the carbon emissions by 8.74 and 7.44 times compared to conventional amendments like lime and cement in Carbon Footprint Analysis.

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Effect of Alkali Contamination on Swelling and Strength Characteristics of Soils

Keerthana,

Sini

2024

Lecture Notes in Civil Engineering

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Role of composition and fabric of Kuttanad clay: a geotechnical perspective

Cited by 11 publications

References 27 publications

Shrinkage and Consolidation Characteristics of Chitosan-Amended Soft Soil—A Sustainable Alternate Landfill Liner Material

Shrinkage and Consolidation Characteristics of Chitosan-Amended Soft Soil—A Sustainable Alternate Landfill Liner Material

Sustainable assessment and carbon footprint analysis of polysaccharide biopolymer-amended soft soil as an alternate material to canal lining

Effect of Alkali Contamination on Swelling and Strength Characteristics of Soils

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