Comparison of different treatment methods on macro-micro characteristics of Yellow River silt solidified by MICP technology

Wang, Yuke; Gan, Wang; Zhong, Yanhui; Shao, Jinggan; Zhao, Jiancang; Li, Dongbiao

doi:10.1080/1064119x.2022.2055508

Cited by 17 publications

(7 citation statements)

References 42 publications

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“…2 Before testing the sample, the machine was preheated for 30 min, so that the temperature of the instrument itself was stable, and the wavelength was unaffected by the temperature. 3 The calibration was first carried out with the standard liquid of uranium. 4 The argon gas flow rate was slowly adjusted to 15 L /min, and the auxiliary gas flow rate was 2 L /min.…”

Section: Methodsmentioning

confidence: 99%

“…The hardness of the tailings can be felt by kneading them by hand. The relative density of the uranium tailings is 2.53, with a natural dry density of 1.446 g/cm 3 and a void ratio of 58.8%. In order to determine the primary parameters of particle size for uranium tailings, a series of particle analysis tests were conducted on the tailing sand.…”

Section: Methodsmentioning

confidence: 99%

“…The thickness, width, and length of tailings are 30 cm, 40 cm, and 100 cm, respectively. The slope of tailings is 30 • , and the volume of tailings is calculated as follows: 100 cm × 40 cm × 30 cm − 1/2 × 40 cm × 30 cm × 60 cm × cos30 • = 88,800 cm 3 . In tailings with a moisture content of approximately 10% and void ratio of 58.8%, the total amount of grout required was calculated as 88.8 × 48.8 = 43.33 L [18].…”

Section: Test Devices and Methodsmentioning

confidence: 99%

“…These studies demonstrate that MICP can induce the formation of crystals with exceptional cementing properties through the metabolic activities of microorganisms. When applied to geotechnical materials, this technology significantly boosted their strength [2,3]. MICP technology empowers an ecologically friendly approach to enhancement since it can improve the stiffness, bearing capacity, permeability, and liquefaction resistance of earth and rock.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Study on the Solidification of Uranium Tailings and Uranium Removal Based on MICP

Zhang

et al. 2023

Sustainability

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The governance of uranium tailings aims to improve stability and reduce radionuclide uranium release. In order to achieve this goal, the uranium removal solution test and uranium tailings grouting test were successively carried out using microbially induced calcium carbonate precipitation (MICP) technology. The effect of MICP on the reinforcement of uranium tailings and the synchronous control of radionuclide uranium in the tailings were discussed. The solution test results show that Sporosarcina pasteurii could grow and reproduce rapidly in an acidic medium with an initial pH of 5. The uranium concentration decreased with the increase in MICP reaction time, and the removal efficiency reached 60.9% at 24 h. In the solidification test of tailings, the strength of tailings improved significantly after 12 days of reinforcement, with an increase in the cohesion of tailings by 2.937 times and an increased internal friction angle of 8.393°. The peak stress value of solidified tailings at the surrounding pressure of 50 kPa increased by 1.87 times, and the uranium concentration in the discharge fluid decreased by 76.91% compared to the blank group. This study provides valuable insights and references for safely disposing of uranium tailings.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Test Devices and Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental Study on the Solidification of Uranium Tailings and Uranium Removal Based on MICP

Zhang

et al. 2023

Sustainability

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“…After research, scholars used MICP technology to solidify a variety of types of soil. These include sand [ 18 , 19 , 20 ], silt [ 21 , 22 ], sandy clayey purple soil [ 23 ], loess [ 24 , 25 ], expansive soil [ 26 , 27 ], and mucky soil [ 28 , 29 ]. The unconfined compressive strength and cohesion of soil were significantly improved.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Influence of Different Factors on the Mechanical Properties of a Soil–Rock Mixture Solidified by Micro-Organisms

Sun

Tuo

et al. 2022

Materials

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In this paper, we focus on the application of mechanical properties in a soil–rock mixture modified by microbial mineralization under the influence of different factors, including pH value, cementing solution concentration, and cementing time. Cementing fluids and samples with different pH values, calcium ion concentrations, and mineralization cementation were prepared. The process of urea hydrolysis MICP under different factors was studied. A solidified soil–rock mixture sample under triaxial compression was measured. Then, combined with scanning test methods, such as SEM and XRD, the influence of different factors on the mechanical strength and failure mode of the soil–rock mixture structure was analyzed from a microscopic point of view. The results show that a low concentration of cementing solution with a high concentration of bacteria liquid generated the highest calcium carbonate content and the strongest cementing ability. When the pH value of the cementation solution is six, the cementation effect between the pores is the best, and the deviatoric stress is stronger. When wet-curing samples, short or long curing time will adversely affect the strength of soil–rock mixture samples, the strongest curing and cementing ability is 5 days. The microscopic results show that the microbial mineralization technology fills the pores between the particles, and the interaction force between particles is enhanced to enhance the strength of the soil–rock mixture.

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Macro and micro experimental study on solidification of Yellow River silt based on different biomineralization technologies

et al. 2023

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Comparison of different treatment methods on macro-micro characteristics of Yellow River silt solidified by MICP technology

Cited by 17 publications

References 42 publications

Experimental Study on the Solidification of Uranium Tailings and Uranium Removal Based on MICP

Experimental Study on the Solidification of Uranium Tailings and Uranium Removal Based on MICP

Experimental Study on the Influence of Different Factors on the Mechanical Properties of a Soil–Rock Mixture Solidified by Micro-Organisms

Macro and micro experimental study on solidification of Yellow River silt based on different biomineralization technologies

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