Influence of Coupling Effects of Time and Water‐to‐Cement Ratio on Rheological Properties of Bingham Cement Grouts

Yang, Zhiquan; Chen, Mao; Ding, Yi; Yang, Yi; Zhu, Yingyan; Guo, Yakun; Wang, Renchao; Zhang, Bihua; Fang, Yuda; Yu, Dongliang; Mi, Yapeng; Su, Jiankung; Liu, Hao; Zhang, Jie; Guo, Yongfa; Li, Zhihou; Chen, Junzhi; Wang, Xu

doi:10.1155/2021/5781753

Cited by 6 publications

(5 citation statements)

References 26 publications

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“…R 2 represents the determination coefficient, reflecting the percentage of variance that can be explained by the regression equation in the variance of the dependent variable. If F>F α=0.05 crit and P<α = 0.05, at level α = 0.05 hydration time and water-cement ratio of slurry have significant effects on rheological parameters of different power-law slurries, and vice versa [31].…”

Section: Analysis Of Experimental Resultsmentioning

confidence: 99%

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Research on Displacement Diffusion Model of Time-Varying Slurry with Rheological Parameters in Unsaturated Media

Mu¹,

Zhou²

2023

Pol. J. Environ. Stud.

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The estimation of grouting pressure and slurry diffusion range in grouting engineering is an urgent engineering problem to be solved, as the diffusion behavior of slurry is extremely concealed and the geological structure of underground rock and soil is complex. Taking power-law slurry as the research object, the seepage movement equation of time-varying slurry is obtained by analyzing the laminar flow movement of the slurry in the circular pipe. A cylindrical diffusion model considered the displacement of slurry-water-gas is established based on the theory of seepage in unsaturated porous media. Combined with the seepage motion equation, relevant boundary conditions and interface conditions, the power-law slurry diffusion equation is obtained, which takes into account the principal grouting parameters and mechanical parameters. At the same time, the rheological characteristics and viscosity time-varying experiment of slurry are carried out to obtain the rheological and consistency coefficient time-varying curves of slurries with different water-cement ratio, as well as corresponding function expressions. Then the numerical examples are used to analyze the mechanism of different factors affecting the slurry diffusion behavior. The above analysis and experimental results confirm the effectiveness and applicability of the research results, which can provide necessary theoretical support and technical reference for the design and construction of grouting projects in unsaturated soil areas.

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Section: Analysis Of Experimental Resultsmentioning

confidence: 99%

“…In the zone of pore fluid, combining Equations ( 4) and ( 5) of boundary and interface conditions and Equations (31), the coefficients C 3 and C 4 can be obtained as follows:…”

Section: Displacement Modelmentioning

confidence: 99%

Research on Displacement Diffusion Model of Time-Varying Slurry with Rheological Parameters in Unsaturated Media

Mu¹,

Zhou²

2023

Pol. J. Environ. Stud.

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“…Because the cement-based material is a Bingham fluid (Roussel, 2011), the shear stress acting on the steel fiber caused by the cement-based material can be expressed by Eq. 22 (Bingham, 1917;Yang et al, 2021):…”

Section: Flow Resistancementioning

confidence: 99%

An investigation of magnetic field distribution for assembly of magnets and its effect on alignment of steel fiber in aligned steel fiber-reinforced concrete

Xu,

Li,

2024

Front. Mater.

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The magnetic field method for preparing aligned steel fiber-reinforced concrete (ASFRC) by solenoid coil has a limitation, which is that the specimen must be placed inside the solenoid coil, limiting its practical engineering application. To overcome this shortcoming, this study proposes a method for preparing ASFRCs using an external magnetic field created by assembled magnets. A theoretical model is proposed to predict the distribution of the external magnetic field and the orientation coefficient of ASFRCs prepared by assembled magnets. The predicted results are compared with the experimental results to verify the proposed model. Finally, flexural tests are used to compare the mechanical characteristics of ASFRCs prepared using assembled magnets and solenoid coil. The results indicate that the assembled magnets can be used to prepare the ASFRC with an orientation coefficient of 0.9 or higher, and the flexural strength is similar to that of the ASFRC prepared by the solenoid coil.

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“…Two types of cement slurry with water-to-cement ratios of 1.0 and 1.25 were selected. According to reference [36], these two water-to-cement ratio cement slurries are considered typical Bingham fluids. The basic rheological parameters of the cement slurries for both water-to-cement ratios are referenced from the literature [37], as shown in Table 2.…”

Section: Bingham Fluid Slurry Slurry Preparationmentioning

confidence: 99%

Infiltration Grouting Mechanism of Bingham Fluids in Porous Media with Different Particle Size Distributions

Xu,

Zhang,

Yin

et al. 2023

Applied Sciences

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Although permeation grouting technology has been widely used in engineering practice, there has not been sufficient research on how the distribution of pore sizes in porous media affects the diffusion of grout. In this study, based on the fractal theory of porous media and the Bingham fluid rheological equation, a Bingham fluid permeation grouting mechanism considering the distribution of pore sizes in porous media is proposed. The mechanism is validated through laboratory experiments and numerical simulations using COMSOL 6.0. During the experiments, parallel electrical resistance imaging is employed to monitor the diffusion range of the grout. Furthermore, the effects of grouting pressure, porosity, and water–cement ratio on the diffusion radius of the grout are analyzed. The results show that the Bingham fluid grout diffuses in a semi-spherical shape in the gravel. Additionally, parallel electrical resistance imaging can analyze the diffusion range of the grout in the gravel. The diffusion radius of the Bingham fluid grout in the gravel is smaller than the diffusion radius obtained by considering the particle size distribution theory, with an average difference of 31.8%. Compared to the diffusion radius obtained without considering the particle size distribution theory, the diffusion radius obtained by considering the distribution of pore sizes is closer to the experimental results. The numerically simulated program, which was developed for this study, can effectively simulate the diffusion law of the Bingham fluid in the gravel. So far, the Bingham fluid seepage grouting model considering the different particle size distribution of porous media has been built. The findings of this study can provide theoretical support and technical reference for practical grouting projects.

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Influence of Coupling Effects of Time and Water‐to‐Cement Ratio on Rheological Properties of Bingham Cement Grouts

Cited by 6 publications

References 26 publications

Research on Displacement Diffusion Model of Time-Varying Slurry with Rheological Parameters in Unsaturated Media

Research on Displacement Diffusion Model of Time-Varying Slurry with Rheological Parameters in Unsaturated Media

An investigation of magnetic field distribution for assembly of magnets and its effect on alignment of steel fiber in aligned steel fiber-reinforced concrete

Infiltration Grouting Mechanism of Bingham Fluids in Porous Media with Different Particle Size Distributions

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