Improving the engineering properties of a soft marine clay with forsteritic olivine

Emmanuel, Endene; Anggraini, Vivi; Raghunandan, Mavinakere Eshwaraiah; Asadi, Afshin; Bouazza, Abdelmalek

doi:10.1080/19648189.2019.1665593

Cited by 18 publications

(11 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This finding suggests that, for the test conditions, the stabilization process began after 72 h of curing. The decrease in the size of the inter-aggregate pores due to the formation of the hydration products (M-S-H and M-A-H) is responsible for reducing the hydraulic conductivity at the early stage of curing (three days curing) [35]. This concurs with the trivial decrease in the hydraulic conductivity of the treated specimens relative to the untreated sample.…”

Section: Hydraulic Conductivity Of Olivine-admixed Soil After Curingsupporting

confidence: 62%

“…Silica (SiO 2 ), alumina (Al 2 O 3 ), and ferric oxide (Fe 2 O 3 ) were the dominant oxides in the clay, constituting about 75.84% of the total concentration. Quartz and montmorillonite were the dominant clay minerals, with kaolinite, illite, and feldspar occurring in minor phases [35]. The geotechnical characteristics of the clay have been investigated in the past.…”

Section: Methodsmentioning

confidence: 99%

“…According to ASTM D5370, olivine is a sustainable, cost-effective, and widely available pozzolanic material (material with the ability to form cementitious compounds in the presence of water after reacting) with the potential to enhance soil strength characteristics owing to its strong affinity for CO 2 adsorption leading to the formation of stable carbonates with strength enhancement properties [10,35,36]. Olivine carbonation has been and is still a leading mineral for the sequestration process, which involves converting magnesium-rich minerals to stable magnesium carbonate precipitates after reacting with CO 2 in the presence of water [37].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

CO2 Carbonation of Olivine-Admixed Marine Clay: Suitability for Bottom Liner Application

et al. 2021

Self Cite

View full text Add to dashboard Cite

This paper focuses on employing an optimization approach in evaluating the hydraulic conductivity (HC) of CO2-carbonated olivine-admixed marine clay for possible utilization as a hydraulic barrier in engineered landfills to minimize leachate migration. The attainable region technique was used to optimize the olivine particle size during the grinding process before treating the soil, while the response surface methodology was used in designing the experiments, evaluating the results, and optimizing the variables responsible for reducing the HC of the CO2-carbonated olivine-treated clay. The effects of the control factors (olivine content, carbonation time, and carbonation pressure) on the response (HC) were studied by variance analysis. The factors and the response were related by a developed regression model. Predicted values from the model were in concurrence with their experimental counterparts. The results show that the HC of the CO2-carbonated olivine-treated clay samples met the Malaysian regulatory specification of ≤10−8 m/s for liner utilization. The optimum conditions were 24.7% olivine content, 20.1 h carbonation time, and 161 kPa carbonation pressure, which decreased the HC by approximately 98%. CO2-carbonation and olivine blend proved to be a sustainable technique to reduce the clay’s HC for possible application as a liner material in engineered landfills.

show abstract

Section: Hydraulic Conductivity Of Olivine-admixed Soil After Curingsupporting

confidence: 62%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

CO2 Carbonation of Olivine-Admixed Marine Clay: Suitability for Bottom Liner Application

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…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: 79%

“…The flocculation of soil particles increases the effective grain size, and thus increases the contact between the soil particles, and hence resulted in the enhanced strength of the compacted soil. At a longer curing period, the increase in the UCS can be attributed to the formation of cementing gels, including magnesium silicate hydrate (M-S-H), magnesium aluminate hydrate (M-A-H), calcium silicate hydrate (C-S-H), and calcium aluminate hydrate (C-A-H) due to the nanoparticles-soil interaction, which improved the bonding of the soil particles, and consequently increased the UCS of the treated soil [35]. Likewise, the nanoparticles turn to fill the voids of the soils effectively; hence, decreasing the porosity and increasing the particle-particle contact.…”

Section: Effect Of Nanoparticles On Unconfined Compressive Strength (mentioning

confidence: 99%

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

et al. 2019

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Utilization of Magnesium-Rich Olivine as a Sustainable Alternative for Soil Stabilization

Deepa,

Gangadhara

2024

Lecture Notes in Civil Engineering

View full text Add to dashboard Cite

Improving the engineering properties of a soft marine clay with forsteritic olivine

Cited by 18 publications

References 63 publications

CO2 Carbonation of Olivine-Admixed Marine Clay: Suitability for Bottom Liner Application

CO2 Carbonation of Olivine-Admixed Marine Clay: Suitability for Bottom Liner Application

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

Utilization of Magnesium-Rich Olivine as a Sustainable Alternative for Soil Stabilization

Contact Info

Product

Resources

About