Montmorillonite as an “accelerator” for the microbial carbon pump during artificial biocrust construction

Plant and Soil, Год журнала: 2025, Номер unknown

Опубликована: Фев. 10, 2025

Язык: Английский

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Attachment Mechanism of In-Situ EPS of Bacillus megaterium and Lysinibacillus sp. on Sand Surface from Soil Improvement Perspective

Geomicrobiology Journal, Год журнала: 2025, Номер unknown, С. 1 - 14

Опубликована: Фев. 26, 2025

Язык: Английский

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UÇUCU KÜL VE GUAR SAKIZI İLE STABİLİZE EDİLMİŞ BİR KİL ZEMİNİN MUKAVEMET ÖZELLİKLERİNİN TAGUCHİ TEKNİĞİ KULLANILARAK DEĞERLENDİRİLMESİ

Kahramanmaraş Sütçü İmam Üniversitesi Mühendislik Bilimleri Dergisi, Год журнала: 2025, Номер 28(1), С. 89 - 103

Опубликована: Март 3, 2025

Geoteknik mühendisliğinde problemli zeminlerin iyileştirilmesinde araştırmacılar uzun yıllardır çimento ve kireç gibi geleneksel kimyasal katkıları yaygın bir şekilde kullanmaktadırlar. Bu malzemelerin zemin stabilizasyonunda sağladığı faydaların yani sıra çevresel açıdan getirdiği zararlar göz ardı edilemeyecek seviyelerdedir. sebeple farklı stabilizasyon malzemeleri ile laboratuvar arazi şartlarında deneyler yaparak çevre, sürdürülebilirlik, ekonomiklik diğer faydalar açısından en iyiye ulaşabilmenin çabasını vermektedirler. çalışma, yukarıda bahsi geçen amaca ulaşabilmek için mükemmel puzolanik özelliklere sahip atık olan uçucu kül çevre dostu sürdürülebilirlik son zamanlarda geoteknik araştırmacıların gözdesi guar sakızının kil zeminin mukavemet özellikleri üzerindeki birlikte etkilerini değerlendirmiştir. Zaman, emek maliyet tasarruf ederek deneysel sürecin yürütülebilmesi Taguchi deney tasarım yönteminden istifade edilmiştir. Sonuç olarak biyopolimer ilavesi doğal serbest basınç mukavemetinin 6,5, sekant elastisite modülünün ise 20,4 kata kadar artış gösterdiği görülmüştür. Elde edilen sonuçlar sadece kireçle stabilize edilmiş numunelerin karşılaştırılmış zemine sakızı ilave etmenin çok daha yüksek artışları verdiği gözlenmiştir.

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Microstructural Analysis of Sand Reinforced by EICP Combined with Glutinous Rice Slurry Based on CT Scanning

Materials, Год журнала: 2025, Номер 18(7), С. 1563 - 1563

Опубликована: Март 30, 2025

Sandy soils are prone to engineering issues due their high permeability and low cohesion in the natural environment. Therefore, eco-friendly reinforcement techniques required for projects such as subgrade filling soft soil foundation enhance performance. This study proposes a synergistic method that combines Enzyme-Induced Calcium Carbonate Precipitation with Glutinous rice slurry (G-EICP). The macroscopic mechanical properties pore structure evolution of reinforced sand were systematically investigated through triaxial tests, unconfined compressive strength (UCS) microstructural characterization based on Scanning Electron Microscope (SEM) Micro- Computed Tomography (CT) tests. results indicate when glutinous volume ratio (VG) reaches 10%, UCS G-EICP-reinforced peaks at 449.2 kPa. coefficient decreases significantly increasing relative density (Dr), VG, confining pressure (σ3), seepage (p). Microstructural analysis reveals may promote calcium carbonate crystal growth, potentially by providing nucleation sites, establishing dual mechanism skeleton enhancement pore-throat clogging. increased incorporation reduces number connected pores, lowers coordination number, elevates tortuosity, thereby inducing marked enhancements both treated compared plain soil.

Язык: Английский

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Strength and water retention behavior of loess stabilized with guar gum and fiber under dry and wet cycles

Scientific Reports, Год журнала: 2025, Номер 15(1)

Опубликована: Апрель 3, 2025

Язык: Английский

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Shear strength of biopolymer amended soil under freeze-thaw cycles: Experimental investigation and DEM modeling

Engineering Geology, Год журнала: 2025, Номер 353, С. 108108 - 108108

Опубликована: Май 4, 2025

Язык: Английский

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Freeze-Dried β-Glucan and Poly-γ-glutamic Acid: An Efficient Stabilizer to Strengthen Subgrades of Low Compressible Fine-Grained Soils with Varying Curing Periods

Polymers, Год журнала: 2024, Номер 16(11), С. 1586 - 1586

Опубликована: Июнь 3, 2024

The freeze-drying of biopolymers presents a fresh option with greater potential for application in soil subgrade stabilization. A freeze-dried combination β-glucan (BG) and γ-poly-glutamic acid (GPA) was used to treat low compressible clay (CL) silt (ML) soils dosages 0.5%, 1%, 1.5%, 2%. California bearing ratio (CBR) test the treated specimens performed under three curing conditions: (i) thermal at 60 °C, (ii) air-curing seven days followed by submergence 4 days, (iii) no curing, i.e., tested immediately after mixing. To investigate influence shear strength on biopolymer-stabilized their variations aging, unconfined compressive (UCS) tests were conducted °C 3 7 21 air curing. maximum CBR 125.3% observed thermally cured CL minimum 6.1% soaked conditions ML soils. Scanning electron microscopy (SEM), infrared spectroscopy, average particle size, permeability, adsorption revealed pore filling, biopolymer coating surface, agglomeration along presence hydrogen bonds, covalent amide Van der Waals forces that contributed stiffening stabilized soil. Using three-dimensional (3D) finite element analysis (FEA) layered elastic (LEA), mechanistic–empirical pavement design carried out thickness catalog prepared CBR. cost reductions 1 km section expected be 12.5%.

Язык: Английский

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Engineering Potential of Pond Ash Geomaterial: A Lightweight Filling Solution

International Journal of Geomechanics, Год журнала: 2024, Номер 24(8)

Опубликована: Июнь 13, 2024

Язык: Английский

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Inulin biopolymer as a novel material for sustainable soil stabilization

Scientific Reports, Год журнала: 2024, Номер 14(1)

Опубликована: Дек. 28, 2024

The development of new urban areas necessitates building on increasingly scarce land, often overlaid weak soil layers. Furthermore, climate change has exacerbated the extent global arid lands, making it imperative to find sustainable stabilization and erosion mitigation methods. Thus, scientists have strived a plant-based biopolymer that favors several agricultural waste sources provides high strength durability for stabilization. This contribution is one first studies assessing feasibility using inulin stabilize mitigate erosion. Inulin sources, alternative traditional additives. Soil samples susceptible wind were collected from dust-prone area in southwest Iran treated with at 0%, 0.5%, 1%, 2% by weight. Their mechanical was evaluated unconfined compressive tests penetrometer. In addition, tunnel (at 16 m/s) performed investigate inulin's potential. after ten wetting–drying cycles assess effect environmental stressors. results indicated 40-fold increase (up 8 MPa) only 0.22% weight loss cycles. SEM images revealed formation biopolymer-induced particle-to-particle bonds. Moreover, Raman spectroscopy molecular (hydrogen) bonding hydrogel-soil particles facilitated hydroxyl groups inulin. deterioration stiffness less noticeable 3rd dry–wet cycle, indicating samples. against wet–dry attributed soil-biopolymer hydrogel, as FTIR analysis.

Язык: Английский

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Enhance the mechanical properties of the fiber-reinforced sandy soil using xanthan gum

Research Square (Research Square), Год журнала: 2023, Номер unknown

Опубликована: Июль 13, 2023

Abstract Biopolymers are popular in soil improvement as an environmentally friendly alternative. Unconfined compressive strength tests, direct shear Brazilian splitting tests were performed to investigate the effect of different xanthan gum content and drying times on mechanical properties fiber-reinforced sandy soils treated with gum. The scanning electron microscope (SEM) was used show microstructure materials. test results that extension time increase have positive significance for strength, maximum UCS, elastic modulus, cohesion, tensile 4829 kPa, 171.65 MPa, 803.76 620 807 respectively, a 14 days. SEM analysis showed enhanced by adhering surface particles after drying, filling pores between enhancing fiber network. These findings significant implications application treatment.

Язык: Английский

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