Injection of Fine Sands with Very Fine Cement Grout

Zebovitz, S.; Krizek, Raymond J.; Atmatzidis, Dimitrios K.

doi:10.1061/(asce)0733-9410(1989)115:12(1717)

Cited by 104 publications

(59 citation statements)

References 2 publications

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“…With the increase of fine sand content, the penetration performance of cement suspensions decreased but with the increase of W/C ratio, the penetration performance of cement suspensions increased. Similar findings were also reported by Zebovitz [2], Eklund and Stille [17] and Markou et al [18].…”

Section: Penetrabilitysupporting

confidence: 89%

“…In addition, the strength of grouted specimens decreased with the increase of fine percentage of sand specimens and W/C ratio. This finding seems to contradict earlier ones reported by Zebovitz et al [2], Schwarz and Krizek [15] and Dano et al [22]. The main reason might be due to the fact that fine particles fill in the voids formed by coarser particles thus reducing the efficiency of grout penetration into the sand specimens and causing weak bonds between particles.…”

Section: Strength Of Grouted Samplesmentioning

confidence: 55%

“…Water was allowed to flow through the specimens until no air bubbles emerged from the outlet at the top of the samples. At that time the permeability of the sand was calculated and water flow was continued until a constant permeability value was obtained; such a condition was assumed to indicate saturation of the sand [2]. The permeability values of sand specimens prepared for grouting were given in Table 1.…”

Section: Injectionmentioning

confidence: 99%

“…Burwell' criteria estimated the groutibility of cementitious grouts in some cases but failed in some others. Therefore, they cannot be considered as a universal criteria [2,3]. This behavior may be attributed to the fact that Burwell criteria are based solely on grain sizes of grout and soil and do not take into consideration such factors as W/C ratio and therefore viscosity which have a considerable effect on penetrability of grouts.…”

Section: Penetrabilitymentioning

confidence: 99%

“…One of the main challenges in the utilization of microfine cement is its grain size distribution, which is quite finer than that of Ordinary Portland Cement (OPC). Microfine cement grouts have also better flow properties and bleed characteristics than OPC grouts [1][2][3]. In addition, the application of some chemical grouts is limited because of their high cost, permanence and toxicity.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Effectiveness of Microfine Portland Cement Grouting on the Strength and Permeability of Medium to Fine Sands

Mollamahmutoğlu

Avcı

2015

Period. Polytech. Civil Eng.

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Section: Penetrabilitysupporting

confidence: 89%

Section: Strength Of Grouted Samplesmentioning

confidence: 55%

Section: Injectionmentioning

confidence: 99%

Section: Penetrabilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effectiveness of Microfine Portland Cement Grouting on the Strength and Permeability of Medium to Fine Sands

Mollamahmutoğlu

Avcı

2015

Period. Polytech. Civil Eng.

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Modelling of cement suspension flow in granular porous media

Saada¹,

Canou²,

Dormieux³

et al. 2005

Int. J. Numer. Anal. Meth. Geomech.

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SUMMARYA theoretical model of cement suspensions flow in granular porous media considering particle filtration is presented in this paper. Two phenomenological laws have been retained for the filtration rate and the intrinsic permeability evolution. A linear evolution with respect to the volume fraction of cement in the grout has been retained for the filtration rate. The intrinsic permeability of the porous medium is looked for in the form of a hyperbolic function of the porosity change. The model depends on two phenomenological parameters only. The equations of this model are solved analytically in the onedimensional case. Besides, a numerical resolution based on the finite element method is also presented. It could be implemented easily in situations where no analytical solution is available. Finally, the predictions of the model are compared to the results of a grout injection test on a long column of sand.

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Groutability of cement‐based grout with consideration of viscosity and filtration phenomenon

Kim

Lee

Jang

et al. 2009

Num Anal Meth Geomechanics

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SUMMARYThe groutability depends on the properties of the grout, its injection processes, and on the mechanical properties of the soil formation. During the process of pouring cement-based grouting into a porous medium, a variation with time occurs in the viscosity of grout suspension. In addition, the particle filtration phenomenon will limit the expansion of the grouted zone because cement particles are progressively stagnant within the soil matrix. In this paper, a closed-form solution was derived by implementing the mass balance equations and the generalized phenomenological filtration law, which can be used to evaluate the deposition of cement-based grout in the soil matrix. The closed-form solution relevant to a particular spherical flow was modified by a step-wise numerical calculation, considering the variable viscosity caused by a chemical reaction, and the decrease in porosity resulting from grout particle deposition in the soil pores. A series of pilot-scale chamber injection tests was performed to verify that the developed step-wise numerical calculation is able to evaluate the injectable volume of grout and the deposition of grout particles. The results of the chamber injection tests concurred well with that of the step-wise numerical calculation. Based on the filtration phenomenon, a viable approach for estimating the groutability of cement-based grout in a porous medium was also suggested, which might facilitate a new insight in the design of the grouting process.

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Injection of Fine Sands with Very Fine Cement Grout

Cited by 104 publications

References 2 publications

Effectiveness of Microfine Portland Cement Grouting on the Strength and Permeability of Medium to Fine Sands

Effectiveness of Microfine Portland Cement Grouting on the Strength and Permeability of Medium to Fine Sands

Modelling of cement suspension flow in granular porous media

Groutability of cement‐based grout with consideration of viscosity and filtration phenomenon

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