The Reduction of the Permeability of a Lateritic Soil through the Application of Microbially Induced Calcite Precipitation

Smith, A. J. E.; Pritchard, Martin; Edmondson, A. S.; Bashir, Shafakat

doi:10.4236/nr.2017.85021

Cited by 15 publications

(8 citation statements)

References 21 publications

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“…In previous work, laboratory analysis on the engineering properties of liquefied soil treated with vege-grout showed an increase in compressive strength and reduction in permeability. It was discovered that the indigenous microorganism in the vege-grout were responsible for the activities which has been demonstrated in a similar study [18].…”

Section: Introductionsupporting

confidence: 56%

Evaluation of Vege-Grout Treated Slope by Electrical Resistivity

Baharuddin¹,

Taha²,

Omar³

et al. 2018

IJET

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Soil stabilization using bio-grouting method based on microbial induced calcium carbonate precipitation (MICP) technology has been developed recently to improve the engineering properties of the soil. This new technology could provide an alternative to traditional methods of soil stabilization using soil-cement and chemical grouting. Vegetable waste is a good source for the growth of various kinds of microorganisms which is suitable to be applied as bio-grouting material. The bio-grout extract known as vege-grout was able to induce bio-cementation and bio-clogging process. In this study, vege-grout from vegetable waste was injected into the soil to strengthen the slope and improve the mechanical properties of the affected area. The changes in the subsurface soil after treatment with vege-grout were evaluated by electrical resistivity measurement. Resistivity test showed the resistance in the soil has increased after the grouting using vege-grout. Results indicated that the underneath soils have transformed from medium dense sand to dense sand. The water containment in the subsurface appeared to shift deeper into the ground. SEM analysis showed evidence of bio-clogging process as a result of microbial activities in the soil. This analysis showed that the vege-grout from vegetable waste has successfully strengthened and stabilized the slope from soil erosion.

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Section: Introductionsupporting

confidence: 56%

Evaluation of Vege-Grout Treated Slope by Electrical Resistivity

Baharuddin¹,

Taha²,

Omar³

et al. 2018

IJET

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“…The coefficient of permeability for the lateritic soil specimen was successfully reduced (1.15 × X 10 -7 m/s-1.92 X 10 -8 m/s) which was an 83% reduction in permeability. However, it could not be determined if the changes in soil mass were due to CaCO 3 crystals or simply S. [119] Page of 44 pasteurii biomass aggregation. Fig.…”

Section: Authors Contributionsmentioning

confidence: 99%

Bioprecipitation of calcium carbonate mediated by ureolysis: A review

Omoregie

Palombo

Nissom

2020

Environmental Engineering Research

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Ureolysis-driven microbially induced carbonate precipitation (MICP) is a naturally occurring process facilitated through microbial activities and biogeochemical reactions to produce calcium carbonate (CaCO 3) mineral. MICP serves as an alternative ground improvement binder method to conventional technologies which is sustainable, requires low energy for its treatment process, results in a minimal carbon footprint and could offer economic benefits. In the last two decades, MICP has drawn great interest from the scientific community because of its practicality to stabilize granular soils, repair concrete cracks and remediate heavy metals. To obtain successful MICP application, it is vital to understand the conditions that favor its process. This paper, therefore, provides an overview of literature on CaCO 3 precipitation mediated by ureolysis-driven MICP and its mechanism. The review includes a discussion on sources of urease enzyme from microorganisms used to induce CaCO 3 crystal formation required for implementation of MCIP for ground improvement. Moreover, the key factors that influence the outcome of MICP and bio-engineering testing methods typically used to evaluate MICP performance are also highlighted. Finally, this review also provides insight on the current drawbacks (i.e. ammonium production, scaleup bioprocess and treatment cost) affecting MICP technology and recommendations for future consideration.

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“…Several investigations had reported positive results on the use of MICP in many engineering uses such as waste containment application [4], [8], soil stabilization for road construction purposes [9], concrete works [10] and so on. Chi et al [11] conducted a study on Aeolian sand to aid in mitigating soil erosion.…”

Section: Introductionmentioning

confidence: 99%

“…The application of MICP at a large scale still has some bottlenecks that are yet to be overcome such as reliance on pH, temperature, calcium concentration, availability of nucleation sites [12], [13]. Notable applications of MICP with respect to soil improvement and in concrete applications has also been reported in several articles [4], [8], [14]- [19].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Bacillus Coagulans and Moulding Water Content on the Unconfined Compressive Strength of Lateritic Soil

Yohanna

Eberemu

Ijimdiya

et al. 2022

Engineering Science & Technology

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The effect of bacterial concentrations of Bacillus coagulans and moulding water content (MWC) on the unconfined compressive strength (UCS) of lateritic soil for use as waste containment material was studied. Tests conducted include index test, pH, calcium carbonate content (CCC), and UCS. Soil samples for all tests were mixed with an increasing number of microbes at step suspension densities of 0 up to 2.4 × 109 cells/ml individually. The soil was prepared at MWC of -2, 0, +2, and +4% in relation to optimum moisture content (OMC) and compacted using the Reduced British Standard Light (RBSL), British Standard Light (BSL), West African Standard (WAS) Compaction and British Standard Heavy (BSH) Compaction Energy (CE) respectively. The cementation reagent was added to the compacted samples and allowed to flow by gravity to a point that saturation was reached. Results revealed an increase in pH, while calcium carbonate content values marginally increased from 3.6% at the natural state to 3.9% maximum value at 2.4 × 109 cells/ml. The UCS values increased with a higher number of microbes. Values increased from 204.6, 278.3, 351.3, and 416.8 kN/m2 for the natural soil to peak values of 1,036.3, 1,835.5, 2,076.8, and 2,237.3 kN/m2 for specimens prepared at -2% OMC and compacted with RBSL, BSL, WAS and BSH compaction energy, respectively. A similar trend was observed for 0, +2, and +4% in relation to OMC. A minimum regulatory UCS value of 200 kN/m2 was achieved at MWC of -2, 0, and +2% OMC for all energies. Therefore, it is recommended that CE, moisture content, and the number of microbes should be carefully studied during field construction of a lateritic soil-compacted clay liner in other to achieve the desired result.

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The Reduction of the Permeability of a Lateritic Soil through the Application of Microbially Induced Calcite Precipitation

Cited by 15 publications

References 21 publications

Evaluation of Vege-Grout Treated Slope by Electrical Resistivity

Evaluation of Vege-Grout Treated Slope by Electrical Resistivity

Bioprecipitation of calcium carbonate mediated by ureolysis: A review

The Effect of Bacillus Coagulans and Moulding Water Content on the Unconfined Compressive Strength of Lateritic Soil

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