Development of transparent cemented soil for geotechnical laboratory modelling

Wei, Lanting; Liu, Fangzhou; Wang, Shanyong; Wang, Cuilin; Chen, Jianfeng

doi:10.1016/j.enggeo.2019.105354

Cited by 14 publications

(6 citation statements)

References 21 publications

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“…By adjusting the particle size of fused quartz and the mass ratio of silica powder, the stress-strain curves of TCS match those of natural clay. (2) Compared with several existing typical transparent geomaterials, such as transparent granular soil (Li et al, 2020), TCS (Wei et al, 2019), transparent glass soil (Kong and Lu, 2014), transparent glass sand (Kong et al, 2013) and Transparent silica gel (Iskander et al, 2002b) used in model tests, the TCS prepared in the present work has a similar stress-strain relationship to them. The difference is that the stress-strain curves of TCS used in this research can be controlled across a wider range, thus TCS has stronger applicability in simulating different natural clays.…”

Section: Application Of Tcs As the Substitute For Claymentioning

confidence: 77%

“…In the two groups, the contents of fused quartz are 132 g (1.375 g/cm 3 ), while the contents of silica powder are 2.64 g (0.028 g/cm 3 ) and 3.96 g (0.041 g/cm 3 ), respectively. The group of data obtained under the condition that the mass ratio of silica powder is 0%, recorded as the group G0, are extracted from the research of Wei et al (2019). The test conditions of the three groups are generally consistent, while the main difference lies in the content of silica powder in the groups.…”

Section: Effects Of the Content And Mass Ratio Of Silica Powdermentioning

confidence: 99%

“…Therefore, it is important to prepare transparent soil with strength akin to that of common geotechnical materials for performing relevant model tests. By combining the advantages of the above two conventional methods for preparing transparent soil, Wei et al (2019); Lanting et al (2020) prepared a transparent cemented soil (TCS) by adding fumed silica powder (cement) into fused quartz-based transparent sand and proved that its mechanical and hydraulic properties make it suitable for simulating common clay. There is a lack of further research into the quantitative mixing ratio of each component, particle size and gradation of the skeleton and compactness of the soil mass in TCS, so it is difficult to apply it directly to physical models.…”

Section: Introductionmentioning

confidence: 99%

“…By referring to the idea of Wei et al (2019); Lanting et al (2020) for preparing TCS, a nano-scale hydrophobic fumed silica powder as cement was added to the preparation of transparent sand as described in previous studies (Iskander and Liu, 2010;Ezzein and Bathurst, 2011;Guzman et al, 2014; and a new TCS was prepared. By controlling the contents and mass ratios of fused quartz and silica powder as well as the particle size distribution of fused quartz, TCS showed geotechnical properties akin to those of common clay or soft rock.…”

Section: Introductionmentioning

confidence: 99%

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Material Preparation and Geotechnical Properties of Transparent Cemented Soil for Physical Modeling

et al. 2021

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The preparation of transparent materials suitable for simulating different rock and soil masses is the foundation for image-based physical modeling tests in studying deformation and failure mechanisms in geotechnical media. A transparent cemented soil (TCS) with similar geotechnical properties of natural soil and soft rock was prepared using fused quartz as the skeleton, hydrophobic fumed silica powder as the cement and mixed mineral oil of 15# white oil and n-dodecane as the pore fluid. Eleven groups of TCS samples with different shear strengths were synthesized by adjusting the content or mass ratio of the cement and particle size or gradation of the skeleton. Contrasting tests of unconsolidated-undrained triaxial compression were carried out and the mechanical characteristics of TCS were analyzed, showing that the stress-strain relationship, shear strength and failure mode of TCS are similar to those of natural soil. The mechanical parameters of TCS undergo complex variation with the factors, and the mesoscopic mechanism of the changes therein was revealed with the help of optical microscope photos. The similarity ratio of TCS to soft rock was derived according to geometries and stress conditions of laboratory model tests, demonstrating the feasibility of using TCS as similar materials to soft rock. Moreover, empirical formulas for the change of shear strength parameters with the factors were fitted to facilitate the preparation of TCS with target shear strength in the future. The findings can provide a basis for preparing transparent similar materials to natural soil and soft rock in physical modeling tests.

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Section: Application Of Tcs As the Substitute For Claymentioning

confidence: 77%

Section: Effects Of the Content And Mass Ratio Of Silica Powdermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Material Preparation and Geotechnical Properties of Transparent Cemented Soil for Physical Modeling

et al. 2021

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“…Ahmed and Iskander [16] evaluated the tunnel construction stability based on the prepared transparent soil and mineral oil solution. Wei et al [17] introduced transparent cemented soil as a surrogate for the physical modeling of geotechnical problems. Zhang [18] developed a transparent rock similar material, which was applied in the stress and deformation experiments of the tunnel.…”

Section: Introductionmentioning

confidence: 99%

Hydrogeology Response to the Coordinated Mining of Coal and Uranium: A Transparent Physical Experiment

Zhang

Zhang³

et al. 2021

Geofluids

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The migration of fracture and leaching solute caused by mining activity is critical to the hydrogeology. To characterize liquid and solid migration in a mining area of intergrown resources, the coordinated mining of coal and uranium was considered, and a physical experiment based on transparent soil was conducted. A well experimental performance of transparent soil composed of paraffin oil, n-tridecane, and silica gel and the leaching solution comprised of saturated oil red O dye was observed for hydrogeology characterization. An “arch-shaped” fracture zone with a maximum height of 90 m above the mined goaf and a “horizontal-shaped” fracture zone with a fractured depth of 9.97–16.09 m in the uranium-bearing layer were observed. The vertical leachate infiltration of 4.83 m was observed in the scenario of uranium mining prior to coal, which is smaller than those in the scenarios of comining of coal and uranium (10.26 m) and coal mining prior to uranium (16.09 m). A slight strata movement below the uranium was observed, and the leaching solution infiltration in the coal mining area was not observed in a short period in the scenario of uranium mining prior to coal; both of those was presented in the scenarios of comining of coal and uranium and coal mining prior to uranium.

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Effects of Coal Metakaolin on Compressive Strength and Microstructure of Cemented Soil

Liu,

Chen,

Zhang

et al. 2024

Lecture Notes in Civil Engineering

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In this paper, compressive strength tests are conducted on the cemented soil with five coal metakaolin (CMK) contents to study the effects of CMK on the cemented soil compressive strength and microstructure. It is found that CMK can enhance the strength of cemented soil. Especially, when the CMK content is 3%, its compressive strength is obviously higher than that of unmixed CMK cemented soil. The effects of CMK on the strength of cemented soil is analyzed and discussed by means of X-ray diffraction (XRD) and scanning electron microscopy image (SEM) analysis. The strength mechanism of cemented soil with CMK is explained by the analysis of hydration products and microstructures of cemented soil. The reason for the macroscopic mechanical property change of cemented soil is proved by the microscopic mechanism. In addition, the relationship of cemented soil compressive strength and age is statistically analyzed. The statistical formula is set up to predict the long-term compressive strength of cemented soil by age. The predicted strength agrees well with the measured strength, indicating that the statistical formula has good predictability.

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Development of transparent cemented soil for geotechnical laboratory modelling

Cited by 14 publications

References 21 publications

Material Preparation and Geotechnical Properties of Transparent Cemented Soil for Physical Modeling

Material Preparation and Geotechnical Properties of Transparent Cemented Soil for Physical Modeling

Hydrogeology Response to the Coordinated Mining of Coal and Uranium: A Transparent Physical Experiment

Effects of Coal Metakaolin on Compressive Strength and Microstructure of Cemented Soil

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