Study on the Effects of Different Water-Cement Ratios on the Flow Pattern Properties of Cement Grouts

Hou, Kai; Guo, Ting Ting

doi:10.4028/www.scientific.net/amm.71-78.1264

Cited by 14 publications

(11 citation statements)

References 3 publications

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“…It can be seen from Figures 2 and 3 that the variation trend of the rheological curve of the six water-cement ratio cement grouts at six different times conformed to the basic characteristics of the rheological curve of a power-law fluid [35,36]. Thus, the grouts were typical power-law fluids, which confirmed the research result of the literature references [4,24]. Additionally, the rheological types of the cement grouts did not change with time, which also confirmed the research results in this study [4].…”

Section: Rheological Curve and Rheological Equation Of Thesupporting

confidence: 81%

“…According to Yang et al's [24] research results, cement grouts belong to the power-law fluid category when their water-cement ratios are less than 0.75. Therefore, in these tests, cement grouts at different watercement ratios (W/C) of 0.5, 0.55, 0.6, 0.65, 0.7, and 0.75 were used to study the rheological properties of power-law cement grouts at different time periods (mixture completion times of the cement grouts) of 0 minutes, 5 minutes, 10 minutes, 20 5 Geofluids minutes, 30 minutes, and 60 minutes.…”

Section: Experiments Methodsmentioning

confidence: 99%

“…Nguyen et al, Mohammed et al, and Senff et al [16][17][18] introduced the rheological properties of some polymer-modified cement grouts; Zou et al [19] studied the influence of rheological properties of power-law fluids on fluid motion propagation; Vasumithran et al [20] introduced the changes of common slurry fillers on the rheological properties of grouts; Li et al [21] discussed the rheological properties of ultrafine cement; Costas [22] considered the influence of different water reducers on the rheological 2 Geofluids properties of cement. In terms of considering the watercement ratio effect, Yang et al [23,24] studied the influence of water-cement ratio on cement grout flow pattern; Cao et al, Mirza et al, discussed the change of rheological properties with different water-cement ratios. As for the temperature factor, Liu et al, Bohloli et al,Petit et al, studied the effects of different hydration temperatures on rheological properties of cement grouts; Schindler et al [32] established a prediction model of concrete grout variation with different temperatures.…”

Section: Introductionmentioning

confidence: 99%

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Comprehensive Effect of the Time and Water-Cement Ratio on the Rheological Properties of Power-Law Cement Grouts

Yang

Ding

et al. 2021

Geofluids

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The rheological properties of cement grouts are significantly affected by the changes of the time and the water-cement ratio, which determine the diffusion state of grouts in rocks and soils and influence the outcome of projects. In this study, Portland cement grouts with water-cement ratios of 0.50, 0.55, 0.60, 0.65, 0.70, and 0.75 at six moments, including 0 minutes, 5 minutes, 10 minutes, 20 minutes, 30 minutes, and 60 minutes, were evaluated to figure out the comprehensive effect of the time and the water-cement ratio on the rheological properties of power-law cement grouts. The results showed that the water-cement ratio had a great influence on both the consistency coefficient and the rheological index of the power-law cement grouts. The former appeared to have a downward trend with the increase of the water-cement ratio, and the latter appeared to have an upward trend. There was a rising tendency between the time and the consistency coefficient, while the rheological index was less affected by time. The difference between its maximum and minimum values was within 5%. Combined with the perspectives of statistical theory, practical applicability, and accuracy, the exponential model was the optimal model for showing the relationship between the comprehensive effects of the time, water-cement ratio, and consistency coefficient of the power-law cement grouts. The linear model was the optimal model of the rheological index based on the comprehensive effect of time and the water-cement ratio. Based on this, a power-law rheological equation with consideration of the comprehensive effect of time and water-cement ratio was established. The research results could not only improve the rheological theory of power-law cement grouts but also provide technical support for engineering practice.

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Section: Rheological Curve and Rheological Equation Of Thesupporting

confidence: 81%

Section: Experiments Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Comprehensive Effect of the Time and Water-Cement Ratio on the Rheological Properties of Power-Law Cement Grouts

Yang

Ding

et al. 2021

Geofluids

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“…In terms of the effects of water-to-cement ratio on the rheology of cement grouts, Mirza et al [19] investigated the rheological properties of fly ash-cement grouts at different ratios. Yang et al [20][21][22][23][24][25] studied the effect of water-tocement ratio on the rheology of cement grouts. Liu et al [21,[26][27][28][29][30][31] considered the characteristics of temperature change on the fluidity of cement grouts.…”

Section: Introductionmentioning

confidence: 99%

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

Yang

Chen

Ding

et al. 2021

Advances in Materials Science and Engineering

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Time and water-to-cement ratio have significant influences on rheology of cement grouts. In order to study effects of time and water-to-cement ratio on rheology of Bingham cement grouts, taking Bingham cement grouts widely used in practical engineering (cement grouts with water-to-cement ratio of 0.75–1.25) as research object, some rheological experiments of five cement grouts with water-to-cement ratio of 0.8, 0.9, 1.0, 1.1, and 1.25 were carried out at six moments of 0, 5, 10, 20, 30, and 60 minutes, respectively. Combining theoretical discussion with numerical analysis, influence of coupling effects of time and water-to-cement ratio on rheological properties of Bingham cement grouts was discussed. Results show that at the level of α = 0.05, time has a significant influence on plastic viscosity but has no significant influence on the yield stress of Bingham cement grouts. Water-to-cement ratio has a significant influence on both plastic viscosity and yield stress. Exponential models obtained by comprehensive analysis from statistical theory, practical applicability, and accuracy are the optimal models to describe quantitative change in the relationship of coupling effects of time and water-to-cement ratio on plastic viscosity and yield stress of Bingham cement grouts. The rheological equation considering coupling effects of time and water-to-cement ratio of Bingham cement grouts is constructed. Research achievements not only have certain theoretical significance to the development and improvement of fluid mechanics and theoretical system of penetration grouting but also provide theoretical support and technical reference for practical grouting engineering and also have certain practical significance for solving or improving the practical engineering problems.

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“…The latter also reviewed various other grout penetration models developed and used in Japan and elsewhere. Yang et al investigated the rheological properties of cement grouts with different water cement ratios and their flow in fractures [21]. The present study deals with some of these issues and describes and discusses theoretical grout flow models for predicting flow into plane-parallel fractures of candidate cement grout materials that behave as Bingham fluids under static pressure and as Newton liquids under oscillatory pressure.…”

Section: Introductionmentioning

confidence: 99%

Study of the Penetration and Diffusion Characteristics of Inorganic Solidified Foam in Rock Fractures

Lü

Wang

2017

Advances in Materials Science and Engineering

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To explore the penetration and diffusion law in coal and rock fractures when inorganic solidified foam (ISF) is used to prevent coal fire, the penetration experiment was conducted; the results showed that the penetration pressure fluctuates within a certain range and decreases with the diffusion distance. In the plane, the diffusion pattern presents an ellipsoid shape, and the diffusion area becomes increasingly large over time; in the plane, the foam fluid penetration changes from dense to loose in the direction and it does not undergo downward penetration and diffuses via its own weight in the direction; in the plane, it is loose on the left and dense on the right. The viscosity of ISF was tested and then the time-varying formula was fitted. The formula of the effective diffusion radius for foam fluid diffusing in the fracture channel was determined theoretically. The permeability coefficient and other related parameters were calculated in terms of the penetration pressure and diffusion time of two monitoring points. At last, the prediction formula of effective diffusion distance of foam fluid was verified with the remaining seven monitoring points and all the relative error of monitoring is within 10%.

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Study on the Effects of Different Water-Cement Ratios on the Flow Pattern Properties of Cement Grouts

Cited by 14 publications

References 3 publications

Comprehensive Effect of the Time and Water-Cement Ratio on the Rheological Properties of Power-Law Cement Grouts

Comprehensive Effect of the Time and Water-Cement Ratio on the Rheological Properties of Power-Law Cement Grouts

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

Study of the Penetration and Diffusion Characteristics of Inorganic Solidified Foam in Rock Fractures

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