Formation of water-impermeable crust on sand surface using biocement

Stabnikov, Viktor; Naeimi, Mohammad; Ivanov, Volodymyr; Chu, Jian

doi:10.1016/j.cemconres.2011.06.017

Cited by 142 publications

(90 citation statements)

References 19 publications

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“…The remaining beakers were filled without allowing the CaCl 2 -urea solution to reach the surface of the sand. As with Stabnikov et al [25], it was observed that when the sand's top surface was immersed in the more aerobic 20 mm layer of CaCl 2 -urea solution, a crust of less-permeable sand formed.…”

Section: Micp Using Sporosarcina Pasteuriimentioning

confidence: 54%

“…This solution was used to treat the surface of a model pond sand structure, and it was found that its permeability was reduced from 1 × 10 −4 to 1.6 × 10 −8 m/s. Unlike the previously reviewed papers, Stabnikov et al [25] sought to establish the nature and quantity of calcite precipitation, in order to provide evidence of a link between MICP activity and permeability reduction. This was undertaken using scanning electron microscopy (SEM), which showed that the formation of CaCO 3 crystals was occurring directly onto the surfaces of the treated sand grains, where bacterial cells or urea molecules had possibly acted as nucleation points.…”

Section: Micp Using Sporosarcina Pasteuriimentioning

confidence: 99%

“…Stabnikov et al [25] aimed to produce a water impermeable crust on a sand surface through the precipitation of calcite crystals into the pore-throats between sand particles. A strain of S. pasteurii was cultivated and 8 g of the bacterial mass was suspended in a 0.75 M CaCl 2 solution at a pH of 7.…”

Section: Micp Using Sporosarcina Pasteuriimentioning

confidence: 99%

See 2 more Smart Citations

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

Smith¹,

Pritchard²,

Edmondson³

et al. 2017

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Lateritic soils are frequently utilised in tropical areas of the developing world as an engineering material in the construction of rural earth roads, usually in the form of engineered natural surface (ENS) roads. The heavy, seasonal rainfalls common to the tropics results in ENS roads becoming quickly saturated with rainwater, and no longer accessible to motorised transportation. Microbially induced calcite precipitation (MICP) has been successfully used as a treatment process to decrease the permeability of clean, cohesionless sands by studies trying to impede the movement of groundwater, and any pollutants they may contain. In order to see if MICP treatment can also reduce the susceptibility of ENS road lateritic soils to rainwater saturation, this study has treated a Brazilian sample extracted from an ENS road in Espirito do Santo, Brazil, using the MICP bacterium Sporosarcina pasteurii contained within a urea-calcium chloride solution inoculum. Investigation, by means of a Rowe cell, of the post-treatment permeability, to untreated control samples, has shown an average decrease in the vertical coefficient of permeability of 83%, from 1.15 × 10 −7 m/s for the untreated control samples, to 1.92 × 10 −8 m/s in treated samples.

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Section: Micp Using Sporosarcina Pasteuriimentioning

confidence: 54%

Section: Micp Using Sporosarcina Pasteuriimentioning

confidence: 99%

See 1 more Smart Citation

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

Smith¹,

Pritchard²,

Edmondson³

et al. 2017

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“…Recently, novel grouting techniques (e.g. see DeJong et al, 2006DeJong et al, , 2010Khatami and O'Kelly, 2013;Stabnikov et al, 2011;Whiffin et al, 2007) have been developed to treat unsaturated coarse-soils by stimulating natural processes. One of these methods, termed biogrouting, has shown some promise in soil cementation via microbially induced carbonate precipitation (MICP).…”

Section: Introductionmentioning

confidence: 99%

Improving sand with microbial-induced carbonate precipitation

Shahrokhi-Shahraki

Zomorodian

Niazi‎

et al. 2015

Proceedings of the Institution of Civil Engineers - Ground Impr

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Microbial-induced carbonate precipitation using urea hydrolysis is a relatively new improvement technique for granular soils. An important factor in achieving uniform calcite deposition (and hence consistent improvements in geomechanical properties) throughout the treated soil mass is the protocol adopted for injecting the reagents of ureolytic bacteria, urea and calcium. This paper reports a laboratory study investigating a technique to treat two loose medium quartz sands using different injection strategies. Staged injection including retention periods, and with a pressure head applied during injection of the bacterial cell solution, proved most effective. Sand specimens were treated using different concentrations of bacterial cell and urea–calcium chloride solutions and for a single injection cycle. Measured strength and stiffness values from unconfined compression tests ranged from 50 to 240 kPa and from 6 to 56 MPa, respectively. Permeability coefficient values were reduced by up to approximately one order of magnitude. Hence, a single injection cycle adhering to the proposed treatment method did not significantly affect the drainage capacity of the sand media. Greater improvements in stiffness and strength were achieved for lower bacterial cell and higher cementation solution concentrations, with a higher molarity of urea (non-equimolar solutions) proving even more effective. These findings were confirmed by scanning electron microscope observations.

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“…Various studies have been performed so far in which MICP is used for improving resistance to liquefaction (Montoya et al 2013), improving foundation bearing capacity and slope stability (van Paassen et al 2010;Whiffin et al 2007), creating water-impermeable crust on sand surface (Stabnikov et al 2011), healing cracks in concrete and masonry (Bang et al 2010;Amidi and Wang 2015), treating waste (Chu et al 2009), immobilizing heavy metals (Fujita et al 2010), performing shallow carbon sequestration (Washbourne et al 2012), promoting the fine tailings consolidation (Liang et al 2015), and improving the compressibility and shear strength of organic soil (Canakci et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Performance of microbial-induced carbonate precipitation on wind erosion control of sandy soil

Maleki

Ebrahimi

Asadzadeh

et al. 2016

Int. J. Environ. Sci. Technol.

140

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Wind erosion is a serious problem throughout the world which results in soil and environment degradation and air pollution. The main objective of this study was to evaluate feasibility of microbial-induced carbonate precipitation, as a novel soil-strengthening technique, to reduce wind erosion risk of a sandy soil. For this purpose, the erosion of biocemented soil samples was investigated experimentally in a wind tunnel under the condition of wind velocity of 45 km h -1 . The weight loss of treated samples relative to the weight loss of control treatment was 1.29 and 0.16 % for low and high bacterial mix concentrations, respectively, indicating a significant improvement in erosion control in biologically treated samples. The effect of biological treatment on wind erosion control was even superior at the higher velocities. Thereafter, the penetration resistance of the surface layers as a simple index of resistance against wind erosion was measured. Significant improvements in the penetration resistance of the treated soil samples were observed. Although low bacterial mix concentrations did not significantly improve the penetration resistance of the samples, significant improvements in the penetration resistance of the treated soil samples were observed reaching to the highest measured strength (56 kPa) in high bacterial mix concentrations samples. Finally, the morphology of precipitated CaCO 3 crystals using scanning electron microscopy and X-ray powder diffraction analysis showed that the CaCO 3 was mainly precipitated as vaterite crystals forming pointto-point contacts between the sand granules.

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Formation of water-impermeable crust on sand surface using biocement

Cited by 142 publications

References 19 publications

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

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

Improving sand with microbial-induced carbonate precipitation

Performance of microbial-induced carbonate precipitation on wind erosion control of sandy soil

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