Use of Microbially Induced Calcite Precipitation for Soil Improvement in Compacted Clays

Punnoi, Benyapa; Arpajirakul, Soyson; Pungrasmi, Wiboonluk; Chompoorat, Thanakorn; Likitlersuang, Suched

doi:10.1007/s40891-021-00327-1

Cited by 20 publications

(6 citation statements)

References 57 publications

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“…This is consistent with recent research, which found that the coefficient of permeability of MICCP treated sand reduces nonlinearly as the CaCO 3 level rises [17]. To assist the MICCP process in geo-technical engineering practices, a large scale analysis of MICCP applications are recommended [18]. In general, the outcome proved the capability of bio-cementation to amend considerably the different features of the sandy soil, even for a minor amount of cementation; this is used asan alternative for accessing the settlement property of this sandy soil [19].…”

Section: Introductionsupporting

confidence: 85%

Effect of bio-cementation process on sandy soil

Kumar

Charpe²,

Krishnamurthy³

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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Microorganisms are used in microbial geo-technology to amend the stability and bearing capacity of soil. In this research, bio-cementation process is induced in sand by using the microbial solution, calcium hydroxide and urea to enhance the physical features of the soil. Stabilization of buildings built on sandy soils using cementitious materials is an effective technique utilized all over the world to boost bearing capacity. The microbial solution was prepared using different natural elements and the sandy soil is cured in the solution for different intervals. The effects of mechanical properties of the sandy soil were observed. The parameters like California bearing ratio, direct shear strength and water permeability test were tested. Considerable improvement was observed in the various properties of sandy soil.

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Section: Introductionsupporting

confidence: 85%

Effect of bio-cementation process on sandy soil

Kumar

Charpe²,

Krishnamurthy³

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…Soil-strengthening technologies can be used in ground improvement [1,2]. The stabilization methods used can be divided into chemical, mechanical, or chemical-mechanical stabilization [3].…”

Section: Introductionmentioning

confidence: 99%

Effect of Palm Fiber Reinforcement on the Unconfined Compressive Performance of Cement-Treated Sand

Buathong,

Chompoorat,

Jongpradist

et al. 2023

Sustainability

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This research studies the unconfined compressive characteristics of cement-treated sand reinforced with palm fiber. Type 1 Ordinary Portland cements with 3, 5, and 7% dry sand weight were mixed with sand and different amounts of water to produce cement-treated sand. Palm fiber contents of 0.5, 1, and 2% volume and fiber lengths of 10, 20, and 40 mm were utilized. Three performance parameters were considered to assess the performance of the cemented sand reinforced with palm fiber: peak strength, strain ratio, and toughness. The results showed that incorporating palm fiber elements could improve the peak strength and ductility and reduce brittleness by increasing the fiber content and length. All palm-fiber-reinforced samples showed a softening behavior and changed the behavior of cement-treated sand from brittle to semi-ductile or ductile. The compressive strength of reinforced cemented sand increased when the fiber length was 40 mm, and the compressive strength was reduced as the fiber content exceeded 1.0%. Palm fiber was the most efficient at increasing the toughness of the cemented specimen because of its rigidity and bridging ability. The optimum fiber content and length for the cement–treated sand were 1.0% and 40 mm, respectively.

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“…of applications such as concrete remediation, wind erosion prevention, and landform stabilization (Arpajirakul et al 2021;Bayat et al 2021;Pungrasmi et al 2019). The precipitation of CaCO 3 crystals on the surface of sediment facilitates binding at the contact points between tailings particles and reduces the size of the pore spaces, which can improve the mechanical strength of the soil matrix and reduce permeability (Gui, et al 2018;Harkes et al 2010;Punnoi et al 2021). This treatment could be advantageous for tailings attenuation, as the formation of a cemented "biocrust" in the upper layer of tailings would reduce water and oxygen ingress, thus limiting the exposure of stored tailings to the weathering processes that control ARD.…”

Section: Introductionmentioning

confidence: 99%

Pilot-scale feasibility study for the stabilization of coal tailings via microbially induced calcite precipitation

Rodin

Champagne

Mann

2022

Environ Sci Pollut Res

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Sustainable long-term solutions to managing tailings storage facilities (TSFs) are integral for mines to operate in a safe and environmentally responsible manner. The long-term storage of subaqueous tailings can pose significant safety, environmental, and economic risks; therefore, alternative containment strategies for maintaining geochemical stability of reactive materials must be explored. In this study, the physical and geochemical stabilization of coal tailings using microbially induced calcite precipitation (MICP) was evaluated at a laboratory pilot scale. Three application techniques simulated commonly used agricultural approaches and equipment that could be deployed for field-scale treatment: spraying on treatment solutions with irrigation sprinklers, mixing tailings and treatment solutions with a rototiller, and distributing treatment solutions via shallow trenches using an excavator ripper. Test cells containing 1.0 × 1.0 × 0.5 m of tailings were treated with ureolytic bacteria (Sporosarcina pasteurii) and cementation solutions composed of urea and calcium chloride for 28 days. Penetrometer tests were performed following incubation to evaluate the extent of cementation. The spray-on application method showed the greatest strength improvement, with in an increase in surface strength of more than 50% for the 28-day testing period. The distribution of treatment solution using trenches was found to be less effective and resulted in greater variability in particle size distribution of treated tailings and would not be recommended for use in the field. The use of rototilling equipment provided a homogenous distribution of treatment solution; however, the disruption to the tailings material was less effective for facilitating effective cementation. Bacterial plate counts of soil samples indicated that S. pasteurii cultures remained viable in a tailings environment for 28 days at 18 °C and near-neutral pH. The treatment was also found to stabilize the pH of tailings porewater sampled over the 28-day incubation period, suggesting the potential for the treatment to provide short-term geochemical stability under unsaturated conditions.

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Use of Microbially Induced Calcite Precipitation for Soil Improvement in Compacted Clays

Cited by 20 publications

References 57 publications

Effect of bio-cementation process on sandy soil

Effect of bio-cementation process on sandy soil

Effect of Palm Fiber Reinforcement on the Unconfined Compressive Performance of Cement-Treated Sand

Pilot-scale feasibility study for the stabilization of coal tailings via microbially induced calcite precipitation

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