Tropical residual soil stabilization: A powder form material for increasing soil strength

Latifi, Nima; Eisazadeh, Amin; Marto, Aminaton; Meehan, Christopher L.

doi:10.1016/j.conbuildmat.2017.04.115

Cited by 99 publications

(21 citation statements)

References 60 publications

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“…It is observed that relatively high percentages of chemical elements such as aluminum (Al), silicon (Si), and iron (Fe) are commonly present in NS, CS, and MS. This observation is consistent with the nature of tropical residual soils [4]. The presence of carbon (C) and platinum (Pt) in three soil samples are due to the carbon tape that adheres the soil chunks to the sample holder and the coating of the platinum on the surface of the soil chunks prior to VP-SEM examination, respectively.…”

Section: Source Of Variation Sum Of Squares Degrees Of Freedom Meansupporting

confidence: 83%

“…In addition, the availability of calcium (Ca) and magnesium (Mg) in CS and MS, respectively, confirmed the presence of calcium and magnesium ions in the treated soil samples to facilitate the hydration and pozzolanic reactions. Similarly, the changes in the Al:Si ratio for the CS and MS as summarized in Table 4 can be attributed to the possible formation of C-A-H, C-S-H, M-A-H, and M-S-H, as observed from the XRD diffractograms of treated soil samples [4,35].…”

Section: Source Of Variation Sum Of Squares Degrees Of Freedom Meanmentioning

confidence: 78%

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Stabilization of a Residual Soil Using Calcium and Magnesium Hydroxide Nanoparticles: A Quick Precipitation Method

et al. 2019

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The current study examines the potential of using calcium and magnesium hydroxide nanoparticles synthetized through a quick precipitation method as soil stabilizers for improving the engineering properties of tropical residual soil. The engineering properties of untreated and nanoparticles-treated soil were studied by carrying out a series of geotechnical tests including compaction, Atterberg limits, falling head permeability, and unconfined compressive strength (UCS). The stabilization mechanisms associated with soil–chemical reactions were further explored by performing microstructural analyses such as x-ray diffraction (XRD), variable-pressure scanning electron microscope (VP-SEM), and energy-dispersive x-ray spectroscopy (EDX). The findings revealed that the calcium hydroxide and magnesium hydroxide nanoparticles improved the geotechnical properties of residual soils in terms of reduced hydraulic conductivity and increased UCS. The percentage reduction of the hydraulic conductivity of magnesium and calcium hydroxide nanoparticles-treated soils compared to untreated soil after seven weeks of permeation were 85.14% and 98.70%, respectively. The magnesium and calcium hydroxide nanoparticles-treated soils subjected to 14 days of curing recorded a percentage increase in the UCS of 148.05% and 180.17%, respectively compared to untreated soil. Hence, it can be concluded that both magnesium and calcium hydroxide nanoparticles can be effectively utilized as environmental-friendly stabilizers.

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Section: Source Of Variation Sum Of Squares Degrees Of Freedom Meansupporting

confidence: 83%

Section: Source Of Variation Sum Of Squares Degrees Of Freedom Meanmentioning

confidence: 78%

Stabilization of a Residual Soil Using Calcium and Magnesium Hydroxide Nanoparticles: A Quick Precipitation Method

et al. 2019

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“…In recent years, application of nanomaterials to enhance the hydromechanical behaviour of fine-grained soils with less environmental drawbacks has received increasing attention (Luo et al 2012;Taha and Taha 2012;Iranpour et al 2016;Bahmani et al 2014;Latifi et al 2015;Latifi et al 2016). Among various nano-sized additives such as copper, alumina, and silica particles, mixing clay nanoparticles with soils is reported to decrease the soil collapse potential, giving rise to a sustainable and environmentally friendly soil stabiliser (Iranpour et al 2016;Latifi et al 2016;Latifi et al 2017). Clay minerals are one of the most stable and abundant materials on the earth surface with less processing efforts required compared to other synthesised stabilisers such as cements.…”

Section: Introductionmentioning

confidence: 99%

Improving mechanical behaviour of collapsible soils by grouting active clay nanoparticles

Seiphoori¹,

Zamanian²

2020

Preprint

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The primary geotechnical concern of collapsible soils such as loess is their hydromechanical instability. During (re)wetting, metastable aggregates disintegrate leading soil to collapse under the applied load or self-weight. In situ chemical stabilisation, such as grouting, is a favoured option to improve the mechanical behaviour of soils; however, the low permeability of loess limits the application of permeation grouting in such deposits. Here a new approach is presented based on the injection of dilute suspensions of montmorillonite clay nanoparticles to improve mechanical behaviour of a low permeable loess. In addition to clay, the grouting behaviour of an ordinary cement material was also evaluated as a typically favoured soil stabiliser. Reconstituted specimens were also prepared by mixing dry clay or cement particles with soil at similar contents and curing time to allow a comparison with the grouting method. Results revealed that clay suspensions feature a high-mobility in the soil medium as well as a remarkable performance in reducing the collapse potential due to: (1) clay effective particle size (∼ 0.25 m) that facilitates its mobility in soil, and (2) formation of strong, capillary-driven solid bridges that reinforce the interparticle bonds during post grouting evaporation. These results encourage the application of clay nanoparticles over cements for a sustainable, economical and eco-friendly grouting approach to improve the mechanical behaviour of low permeable collapsible soils.

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“…Calcium carbide residue (CCR), a by-product of the acetylene production process, was investigated for its ability to improve the engineering properties of clays [30]. A new calcium-based powder additive named SH-85 was used for the stabilization of a tropical residual laterite soil [31]. Xanthan gum was proposed as an environmentally friendly stabilizer that could improve the engineering properties of both low-and high-swelling clays [32].…”

Section: Introductionmentioning

confidence: 99%

Study on the Stabilization Mechanisms of Clayey Slope Surfaces Treated by Spraying with a New Soil Additive

et al. 2019

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The topsoil of a clayey slope is easily washed off by rain due to its loose structure. To protect the slope surface, in recent years, several types of non-traditional soil additives have been used by means of mixing with soil. In this work, a new organic polymer soil stabilizer, named aqua-dispersing-nano-binder (ADNB), was sprayed on the soil surface to stabilize the topsoil of a clayey slope. To understand the interaction between the polymer and soil particles during the infiltration process as well as the stabilization mechanism, infiltration tests, water stability tests and scanning electron microscopy (SEM) analyses were performed with different polymer contents. The infiltration tests showed that the infiltration rate of the polymer stabilizer in the soil was slower than that of water due to its characteristics of easy adhesion to soil particles, poor fluidity and large molecular volume. The maximum effective infiltration depth was achieved in the specimen treated with 2% ADNB, and the minimum was achieved in the specimen treated with 5% ADNB. The water stability of the soil increased with the content of the soil stabilizer in the soil aggregates with diameters of either 5–10 mm or 10–20 mm. The SEM analysis showed that the quantity of polymer decreased with infiltration depth; a polymer membrane was formed on the surface of the topsoil and chains were formed inside. The amelioration of the soil water stability may have been due to the bonding between soil particles and polymers generated after evaporation of water in the emulsion. The polymer stabilizer could be applied to improve the erosion resistance of the slope topsoil and reduce soil loss.

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Tropical residual soil stabilization: A powder form material for increasing soil strength

Cited by 99 publications

References 60 publications

Stabilization of a Residual Soil Using Calcium and Magnesium Hydroxide Nanoparticles: A Quick Precipitation Method

Stabilization of a Residual Soil Using Calcium and Magnesium Hydroxide Nanoparticles: A Quick Precipitation Method

Improving mechanical behaviour of collapsible soils by grouting active clay nanoparticles

Study on the Stabilization Mechanisms of Clayey Slope Surfaces Treated by Spraying with a New Soil Additive

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