Dimensional influence of basalt fiber reinforcements on the consolidation behaviour of rice husk ash stabilized soils

Owino, Alex Otieno; Nahar, Nurun; Hossain, Zakaria; Tamaki, Noma

doi:10.1016/j.conbuildmat.2022.127686

Cited by 14 publications

(4 citation statements)

References 40 publications

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“…Appreciable application of randomly distributed fibers to enhance the post-peak strength, secant deformation modulus (E s ), unconfined compressive strength (UCS), and California bearing ratio (CBR) of clays for use as significant parameters in construction of road infrastructures [11,14], whereas peak shear strength and secant deformation modulus can be derived from the UCS stress-strain curve [15]. Fibers are commonly used as sustainable reinforcing smart materials for reduction of compressibility as fibers make a net due to random distribution in clay to resist deformation and swelling [16,17].…”

Section: Introductionmentioning

confidence: 99%

Prediction of Compression Index from Secant Elastic Modulus and Peak Strength of High Plastic Clay Ameliorated by Agro-Synthetic Waste Fibers for Green Subgrade

Zubair,

Farooq,

Farooq

et al. 2023

Sustainability

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Agro-synthetic stabilization of high-plastic clay is trending due to its vital role in sustainable geotechnical construction and maintenance of clay subgrade. Remoulded samples of high plastic clay (C), ameliorated by optimal doses of 1.2% polyester (P) and 0.9% banana (B) at maximum dry density (γdmax) and optimum moisture content (OMC), were subjected to swell potential, unconsolidated undrained (CU) triaxial, consolidation, and California bearing ratio (CBR) tests. The outcome of this research presents that the use of an optimal clay-polyester-banana (CPB) mix enhanced the secant elastic modulus (E50), peak strength (Sp), and CBR by 2.5, 2.43, and 2.7 times, respectively; increased E50/Cc increased from 12.29 to 53.75 MPa; and lowered the swell potential by 48% and compression index (Cc) by 42.8%. It was also observed that the increase in moisture content (mc) of the optimal CPB mix from 20% (unsaturated phase) to 32% (wet phase) decreased Sp from 212 kPa to 56 kPa and E50 from 8.42 MPa to 2.16 MPa, whereas Cc was increased from 0.16 to 0.26, depicting the potential use of the CPB mix as a stable and sustainable geotechnical material even in wet seasons. Novel correlations are developed for the prediction of Cc from mc, E50, and Sp for an optimal CPB mix to achieve sustainable geotechnical systems and designs in sustainable geo-environmental engineering.

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Section: Introductionmentioning

confidence: 99%

Prediction of Compression Index from Secant Elastic Modulus and Peak Strength of High Plastic Clay Ameliorated by Agro-Synthetic Waste Fibers for Green Subgrade

Zubair,

Farooq,

Farooq

et al. 2023

Sustainability

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“…Following standard geotechnical practices [36], systematic soil sampling was conducted to obtain representative samples. The soil used in this research was air-dried for three weeks [37] and then sieved through the 2 mm sieve [38] before the triaxial test. Air drying the soil for three weeks ensured the moisture content was consistent across all samples.…”

Section: Introductionmentioning

confidence: 99%

Shear strength of soil by using rice husk ash waste for sustainable ground improvement

Shehata,

Owino,

Islam

et al. 2024

Discov Sustain

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In the global construction industry, areas characterized by weak and expansive soils are on the rise, necessitating effective solutions for strength enhancement. Addressing this concern, sustainable soil amendments have gained attention, with rice husk ash (RHA) from rice milling industries being a notable focus. Our experimental study aimed to assess the shear strength of this innovative construction material, introducing a unique approach that considers subgrade layers with minimal cement dosage, including upper, bottom, and double layers a novel contribution yet unexplored in existing literature. In addition to conventional mechanical testing, we employed SEM (Scanning Electron Microscopy) and EDS (Energy-Dispersive X-ray Spectroscopy) analyses to comprehensively explore the treated soils' microstructural and elemental composition aspects. Examining sixteen specimen combinations of weak expansive soil-RHA-cement, varying proportions of RHA (2%, 4%, 6%) and cement (2%, 4%, 6%) were mixed to understand their effects on shear strength parameters. Our findings revealed significant shear strength improvement in each subgrade layer, with specimen 6%RHA6%C in the lower subgrade layer exhibiting the highest cohesive strength at 143 kN/m2. Notably, the double layer configuration, specimen 2%RHA6%C, achieved maximum deviatoric stresses of 383 kN/m2. This novel construction material contributes to effective waste management and presents an innovative engineering solution for sustainable ground improvement, offering promising prospects for future geotechnical advancements.

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“…Other binders may also be used in various proportions and effects on soil, such as fly ash, bitumen, insoluble polymers, slag. Non-traditional binders may used as local products, e.g., eggshell lime (Oluwatuyi et al, 2018;Beck Saldanha et al, 2021), rice husk ash (Yadav et al, 2017;Owino et al, 2022), coir fiber (Boobalan and Devi, 2022). Thus, major factor for selecting a proper binder for a better soil stabilization is the soil grain size, that is, a contact area between the particles.…”

Section: Introductionmentioning

confidence: 99%

Laboratory Experiments on Soil Stabilization to Enhance Strength Parameters for Road Pavement

Lindh

Lemenkova

2023

Transport and Telecommunication Journal

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Clay soils can cause significant distress in road construction due to their low strength. Stabilizing such soil improve with binder agents prior to the geotechnical works can significantly its performance and ensure safety and stability of roads while exploitation. This research envisaged the use of five different binders (lime, energy fly ash, bio fly ash, slag, cement) as an additive stabilizing agents to improve the strength parameters of soil as required in engineering industry standards. The variations of strength was assessed using measurements of P-wave velocity of the elastic waves propagating through soil specimens stabilized by different combination of binders. Measurements were performed on 28th day of soil treatment. The best effects of added binders were noted in the following combinations: cement / energy fly ash / bio fly ash (P-waves >3100 m/s), followed by combination lime / energy fly ash / GGBFS (P-waves >2800 m/s) and cement / lime / energy fly ash (P-waves >2700 m/s). Adding lime is effective due to its fixation and chemical bond with particles. The study contributes to the industrial tests on soil strength for constructing roadbed.

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Dimensional influence of basalt fiber reinforcements on the consolidation behaviour of rice husk ash stabilized soils

Cited by 14 publications

References 40 publications

Prediction of Compression Index from Secant Elastic Modulus and Peak Strength of High Plastic Clay Ameliorated by Agro-Synthetic Waste Fibers for Green Subgrade

Prediction of Compression Index from Secant Elastic Modulus and Peak Strength of High Plastic Clay Ameliorated by Agro-Synthetic Waste Fibers for Green Subgrade

Shear strength of soil by using rice husk ash waste for sustainable ground improvement

Laboratory Experiments on Soil Stabilization to Enhance Strength Parameters for Road Pavement

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