Banana Fibre-Reinforcement of a Soil Stabilized with Sodium Silicate

Gobinath, R.; Akinwumi, I. I.; Afolayan, O. D.; Karthikeyan, Saravana; Manojkumar, M.; Gowtham, Sivaraj; Manikandan, A.

doi:10.1007/s12633-019-00124-6

Cited by 37 publications

(9 citation statements)

References 17 publications

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“…For high-resolution chemical microscopy soil samples needs to be dehydrated and embedded in various matrixes as a preprocessing step to preserve and stabilize its structure under high vacuum analysis ( Tippkötter and Ritz, 1996 ; Nunan et al, 2001 ; Bronick and Lal, 2005 ; Herrmann et al, 2007a , b ; Juyal et al, 2019 ). Depending on the characterization technique, such a matrix can be gelatin ( Olcott, 1960 ), sulfur ( Lehmann et al, 2005 ; Kinyangi et al, 2006 ), water glass ( Gobinath et al, 2019 ; Szoboszlay and Tebbe, 2020 ) or a polyester, epoxy, or acrylic resins ( Tippkötter and Ritz, 1996 ; Schlüter et al, 2019 ). Among these, Araldite 502 is a widely used epoxy resin for soil embedding because it is fast out-gassing, vacuum compatible and can easily be polished to obtain a smooth surface for surface analysis ( Tippkötter and Ritz, 1996 ; Herrmann et al, 2007a ).…”

Section: Introductionmentioning

confidence: 99%

Microbial Identification, High-Resolution Microscopy and Spectrometry of the Rhizosphere in Its Native Spatial Context

et al. 2021

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During the past decades, several stand-alone and combinatorial methods have been developed to investigate the chemistry (i.e., mapping of elemental, isotopic, and molecular composition) and the role of microbes in soil and rhizosphere. However, none of these approaches are currently applicable to characterize soil-root-microbe interactions simultaneously in their spatial arrangement. Here we present a novel approach that allows for simultaneous microbial identification and chemical analysis of the rhizosphere at micro− to nano-meter spatial resolution. Our approach includes (i) a resin embedding and sectioning method suitable for simultaneous correlative characterization of Zea mays rhizosphere, (ii) an analytical work flow that allows up to six instruments/techniques to be used correlatively, and (iii) data and image correlation. Hydrophilic, immunohistochemistry compatible, low viscosity LR white resin was used to embed the rhizosphere sample. We employed waterjet cutting and avoided polishing the surface to prevent smearing of the sample surface at nanoscale. The quality of embedding was analyzed by Helium Ion Microscopy (HIM). Bacteria in the embedded soil were identified by Catalyzed Reporter Deposition-Fluorescence in situ Hybridization (CARD-FISH) to avoid interferences from high levels of autofluorescence emitted by soil particles and organic matter. Chemical mapping of the rhizosphere was done by Scanning Electron Microscopy (SEM) with Energy-dispersive X-ray analysis (SEM-EDX), Time-of-Flight Secondary Ion Mass Spectrometry (ToF-SIMS), nano-focused Secondary Ion mass Spectrometry (nanoSIMS), and confocal Raman spectroscopy (μ-Raman). High-resolution correlative characterization by six different techniques followed by image registration shows that this method can meet the demanding requirements of multiple characterization techniques to identify spatial organization of bacteria and chemically map the rhizosphere. Finally, we presented individual and correlative workflows for imaging and image registration to analyze data. We hope this method will be a platform to combine various 2D analytics for an improved understanding of the rhizosphere processes and their ecological significance.

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Section: Introductionmentioning

confidence: 99%

Microbial Identification, High-Resolution Microscopy and Spectrometry of the Rhizosphere in Its Native Spatial Context

et al. 2021

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“…(2014) , while working with laterite soil, concluded that the compressive strength starts decreasing by increasing the percentage of sodium silicate-based stabiliser beyond 9%. Gobinath et al. (2020) observed a considerable increase of about five times in UCS and more than ten times in CBR for gravelly sand when treated with 1% Sodium Silicate and 0.5% banana fibre.…”

Section: Ground Improvement Using Chemical Stabilisersmentioning

confidence: 87%

Ground improvement using chemical methods: A review

Verma

Ray

Rai

et al. 2021

Heliyon

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Ground improvement will be critically important in the present and future geotechnical practice for designing the structures in weak soil. This paper presents a review of the recent development in ground improvement techniques, especially chemical stabilisers. Various available chemical stabilisers are identified and compared with other available methods. Though the use of chemicals provides an excellent alternative to the traditional methods, they still lack proper understanding regarding their use, handling, application, and long-term effect on the environment. Various chemical stabilisers and their applicability conditions are summarised in the present paper. Insight of biochemical, electrochemical, inorganic, and organic stabilisers is presented with future scope of these methods along with the potential areas where a lot of efforts is needed to industrialise these methods are also discussed briefly. A need for developing a more environmentally friendly and safe method was felt while reviewing these methods. Lack of a large amount of data is a major concern for lesser use of these methods industrially. A lot of laboratory and field experiments should be conducted in different conditions to ensure safe results from chemical stabilisers.

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“…The soil tests with banana fiber content is experimented and it shows that the strengthened soil with 0.5% banana fiber content had its Unconfined Compressive Strength expanded by 1.8 MPs over the control soil. The expansion in the Unconfined Compressive Strength of the reinforced soil was because of the shear transfer by the banana fibre [69]. Even addition of PET bottle fibre in very small quantity reduces post cracking behaviour in concrete [67] (Fig.…”

Section: Synthetic Fibresmentioning

confidence: 99%

Impacts of nonconventional construction materials on concrete strength development: case studies

Guruvare¹,

Kumar²,

Olalusi

2020

SN Appl. Sci.

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Sustainable building technology is a new approach adopted in built environment, which is focused on significantly reducing impact of the construction industry on the environment. Moreover, the world is largely driving development of sustainable and smart products to mitigate global pollution issues. In this study, assessment of the impacts of using alternative constituents such as crumb rubber, coconut shell, recycled aggregate, GGBS, human hair, banana fiber, industrial sludge, saw dust, rice husk, wood waste, textile, copper slag, textile, glass powder, plastic etc., on concrete strength development using case studies has been performed. The paper explores the research work carried out towards sustainable approach in replacement of basic composition of concrete. It focuses on various waste materials used as a substitute options in concrete and characteristic strength development along with potential challenges. Leading researches relating to sustainable materials were also explored. The results show that the alternative aggregates, mostly with minimally usage of about 20% increased the compressive strength properties of concrete. Usage of fibres to about increased the flexural property of concrete and the replacement of waste sludge didn't show appreciable increased of compressive strength.

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Banana Fibre-Reinforcement of a Soil Stabilized with Sodium Silicate

Cited by 37 publications

References 17 publications

Microbial Identification, High-Resolution Microscopy and Spectrometry of the Rhizosphere in Its Native Spatial Context

Microbial Identification, High-Resolution Microscopy and Spectrometry of the Rhizosphere in Its Native Spatial Context

Ground improvement using chemical methods: A review

Impacts of nonconventional construction materials on concrete strength development: case studies

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