Retarding effect of concentration of cementation solution on biocementation of soil

Cui, Ming-Juan; Wu, Shifan; Yang, Yang; Chu, Jian

doi:10.1007/s11440-021-01149-1

Cited by 80 publications

(30 citation statements)

References 47 publications

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“…According to the change trend between the calcite content and compressive strength, the correlation between them may conform to an exponential function, shown in Equation (3). The exponential relationship between the compressive strength and calcite content is in line with that reported in the literature [ 23 , 24 , 25 , 26 , 27 ]:

where S is the compressive strength and x is the percentage of calcite content.…”

Section: Resultssupporting

confidence: 89%

Mechanism of Sand Cementation with an Efficient Method of Microbial-Induced Calcite Precipitation

Wang

Liu

2021

Materials

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This paper presents an efficient method of microbial-induced calcite precipitation (MICP) for cementation of sand particles. First, the influence of initial pH value of the culture medium on the growth of bacteria was discussed. Then, the compressive strength and calcium carbonate content of cemented sand columns with different sand particle sizes were measured to indicate the cementation effectiveness. The microstructure of cemented sand columns as well as the mineral composition and distribution of calcium carbonate were characterised by means of scanning electron microscopy-energy dispersive spectrometer (SEM-EDS) and X-ray diffraction (XRD). The results showed that the urease-producing bacteria S. pasteurii can be cultured at the initial pH values of 7–10, while a higher pH (e.g., 11) would hinder its growth and decrease its urease activity. The injection method of MICP with high standing time can cement sand columns effectively. Small average sand particle size of sand columns and high injection cycles can facilitate the gain of compressive strength, while calcium carbonate content of sand column higher than 8% can promote the increase of compressive strength. XRD results indicate that the fine grains generated on the surface of sand particles are calcite. The distribution of calcite on sand particles’ surface is broad and uniform. First, calcite was precipitated on the surface of sand particles, and then a precipitation layer was formed, which would connect sand particles through its high enough thickness and contribute to the development of compressive strength of the whole sand column.

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where S is the compressive strength and x is the percentage of calcite content.…”

Section: Resultssupporting

confidence: 89%

Mechanism of Sand Cementation with an Efficient Method of Microbial-Induced Calcite Precipitation

Wang

Liu

2021

Materials

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“…Meanwhile, Zhao et al [190] stated that the increase rate for the UC strength of bio-cemented sand tends to decrease with the increase in CCS and attributed this to the process that the calcium cannot be fully utilized when the CCS is higher than 1.0 mol/L, which might be caused by the limitation of the enzyme quantities or the reduction in the urease activity of bacteria. Al Qabany and Soga [226] also reported that the chemical efficiency of the 1.0 mol/L case (about 20%) was much lower than that of 0.25 and 0.5 mol/L (varying from 70% to 100%) cases. However, they believed it was due to the less stable calcium carbonates (i.e., vaterite) would be precipitated using 1.0 mol/L and higher CCS, which may be flushed out at the subsequent injections.…”

Section: Cementation Solution Parametersmentioning

confidence: 94%

“…II) Concentration of Cementation Solution (CCS): To date, numerous studies have been conducted to investigate the effect of CCS on the biocementation of MICP. Cheng et al [223], Al Qabany and Soga [226], Lai et al [227], and Mujah et al [228] reported that a lower CCS generally results in a greater strength enhancement of the biocemented sand under the similar calcite content. Both Al Qabany and Soga [226] and Mujah et al [228] believed it was caused by the difference in the sizes of the precipitated calcite crystals.…”

Section: Cementation Solution Parametersmentioning

confidence: 99%

“…Cheng et al [223], Al Qabany and Soga [226], Lai et al [227], and Mujah et al [228] reported that a lower CCS generally results in a greater strength enhancement of the biocemented sand under the similar calcite content. Both Al Qabany and Soga [226] and Mujah et al [228] believed it was caused by the difference in the sizes of the precipitated calcite crystals. Al Qabany and Soga [226] found that the calcite crystals precipitated using high CCS had large size and inhomogeneity distributed spatially, which would cause the samples to deform locally during loading, resulting in smaller strength enhancement of the biocemented sample as a whole.…”

Section: Cementation Solution Parametersmentioning

confidence: 99%

“…Both Al Qabany and Soga [226] and Mujah et al [228] believed it was caused by the difference in the sizes of the precipitated calcite crystals. Al Qabany and Soga [226] found that the calcite crystals precipitated using high CCS had large size and inhomogeneity distributed spatially, which would cause the samples to deform locally during loading, resulting in smaller strength enhancement of the biocemented sample as a whole. Namely, the low strength enhancement of the biocemented sample using high CCS is due to the inhomogeneous cementation caused by the large size of the precipitated calcite crystals.…”

Section: Cementation Solution Parametersmentioning

confidence: 99%

See 2 more Smart Citations

Recent development in biogeotechnology and its engineering applications

Cui

Chu

2021

Front. Struct. Civ. Eng.

Self Cite

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Microbial geotechnology or biogeotechnology is a new branch of geotechnical engineering. It involves the use of microbiology for traditional geotechnical applications. Many new innovative soil improvement methods have been developed in recent years based on this approach. A proper understanding of the various approaches and the performances of different methods can help researchers and engineers to develop the most appropriate geotechnical solutions. At present, most of the methods can be categorized into three major types, biocementation, bioclogging, and biogas desaturation. Similarities and differences of different approaches and their potential applications are reviewed. Factors affecting the different processes are also discussed. Examples of up-scaled model tests and pilot trials are presented to show the emerging applications. The challenges and problems of biogeotechnology are also discussed.

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Effect of Oxygen Supply on Behavior of Microbially Induced Carbonate Precipitation (MICP) Cemented Soil

Xu,

Wang,

Liu

et al. 2024

Environmental Science and Engineering

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Retarding effect of concentration of cementation solution on biocementation of soil

Cited by 80 publications

References 47 publications

Mechanism of Sand Cementation with an Efficient Method of Microbial-Induced Calcite Precipitation

Mechanism of Sand Cementation with an Efficient Method of Microbial-Induced Calcite Precipitation

Recent development in biogeotechnology and its engineering applications

Effect of Oxygen Supply on Behavior of Microbially Induced Carbonate Precipitation (MICP) Cemented Soil

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