Grouting rock fractures with cement and sodium silicate grout

Zhang, Weijie; Li, Shucai; Wei, Jiuchuan; Zhang, Qingsong; Liu, Rentai; Zhang, Xiao; Yin, Huiyong

doi:10.1007/s13146-016-0332-3

Cited by 98 publications

(47 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Standard EN 447 [17] establishes the requirements applicable to the flow test and the Marsh cone. The test determines the time elapsed until a specific volume of fluid cement grout go through a standardized flow cone.…”

Section: Fluiditymentioning

confidence: 99%

“…Another field of study is the analysis of parameters as the classification of mechanical properties with sand (Lim et al [16]).Different studies also show results carried out with substitutions of blast furnace slags in small percentages by always adding additives or chemical substances. In 2017, Weijie Zhang introduced sodium silicate for a rapid adjustment [17]. Reza Azadi et al (2013) [18] worked with chemical additives to optimize the grout.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Advances in the Analysis of Properties Behaviour of Cement-Based Grouts with High Substitution of Cement with Blast Furnace Slags

Pérez-García

Cintas²,

Parrón-Rubio³

et al. 2020

Materials

View full text Add to dashboard Cite

This article presents a study of the main properties (consistency, workability, leaching, unsoundness, and mechanical properties) of cement grouts prepared with cement replacement by blast furnace slag (GGBS). Mixtures have been analyzed in the absence of additives and reached high replacement percentages. As shown in the different tests presented, the observed evolution of the resistance and workability of the mixtures makes them very interesting for its application. Different types of cement (CEM-I 42.5 and CEM-I 52.5 R) and different water/binder values (1 and 0.67) are used. The results present opportunities for the steel industry by the intensive valorization of slag waste. The reduction of the use of cement in construction is also one of the key aims of this line of research. Results show improvements in the mechanical response with good fresh state properties for substitution percentages up to 70%. It is verified with leaching analysis that these products have less impact on the environment.

show abstract

Section: Fluiditymentioning

confidence: 99%

mentioning

confidence: 99%

Advances in the Analysis of Properties Behaviour of Cement-Based Grouts with High Substitution of Cement with Blast Furnace Slags

Pérez-García

Cintas²,

Parrón-Rubio³

et al. 2020

Materials

View full text Add to dashboard Cite

show abstract

“…Many water-burst hazards have occurred in coal mines in China during the past few decades, causing casualties and significant property losses [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. To prevent water ingress, the grouting technique has been extensively and effectively applied to water-bearing strata in underground constructions for more than two hundred years [18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Grouting Mechanism of Cement‐Based Slurry in a Concentric Annulus under High Groundwater Pressure

Zhang

Han

Zhang

et al. 2019

Advances in Civil Engineering

Self Cite

View full text Add to dashboard Cite

The flow of cement-based slurry within concentric annular geometry is a major problem of study in the field of engineering, especially regarding the prevention of water ingress in an annulus formed during shaft construction utilizing the artificial freezing technique in China. In this study, an analytical governing equation of motion for the axial flow of an incompressible Newtonian fluid in a long concentric annulus is derived under the condition of high groundwater pressure. A stepwise calculation method is proposed to describe the grouting process based on two injection modes, namely, flow rate control and pressure control. The injection time is divided into a series of time segments; correspondingly, the grouted zone is subdivided into infinitesimal elements. Some key parameters, such as the location, dimension, slurry viscosity, and pressure gradient of each element, can be obtained using the developed MATLAB program. On this basis, the distribution of pressure and slurry viscosity in the grouted zone and the variations in injection pressure at the grouting point and grouting flow rate are determined. Two injection mode cases are investigated to reveal the grout propagation in the concentric annulus. Finally, numerical simulations are conducted and employed to validate and calibrate the calculated results. The results obtained by the present stepwise calculation method show good agreement with the numerical results.

show abstract

“…The hydraulic fracturing is currently the most widely used and effective stimulation technique . It can propagate the fractures, improve the permeability of coal reservoir, increase the area of desorption and seepage, and thus improve the productivity of CBM wells . Therefore, the reservoir parameters (especially the effect of fracture propagating and the permeability increasing) of postfracturing should be paid more attention in the study of productivity forecast for CBM wells.…”

Section: Introductionmentioning

confidence: 99%

Postfracturing permeability prediction for CBM well with the analysis of fracturing pressure decline

Zhang

Wang

et al. 2019

Energy Science & Engineering

View full text Add to dashboard Cite

Hydraulic fracturing is a widely used reservoir stimulation technique to exploit CBM in China. Compared with the original permeability of coal reservoir, the postfracturing permeability is more critical for the productivity evaluation of CBM wells. Based on hydraulic fracturing, microseismics monitoring, and well test data of the CBM wells in Zhengzhuang block of Qinshui Basin, this paper proposes a simple method to obtain the fitting pressure by the classic fracturing pressure decline analysis theory under the condition of corrected dynamic overall leakoff coefficient. In addition, the postfracturing permeability of coal reservoir is predicted by the injection well testing theory. The morphology of hydraulic fractures in the study area is mainly determined by in‐situ stress, and most fractures are vertical ones propagating along the direction of the maximum principal stress. The fracturing curves of the study area can be classified into stable curves, stably fluctuating curves, descending curves, ascending curves, and fluctuating curves, where the stable and descending fracturing curves represent better fracturing effect. The length of hydraulic fractures is much greater than the height. The PKN model has been selected as the hydraulic fracture propagation model to analyze the fracturing pressure decline. The slope value of liner segment of G(δ,0) curve is proposed as the criterion for the fitting pressure calculation. The postfracturing permeabilities of coal reservoir range from 1.55 to 8.83 × 10−3 μm2, all of which are remarkably higher than that of the original reservoir.

show abstract

Grouting rock fractures with cement and sodium silicate grout

Cited by 98 publications

References 18 publications

Advances in the Analysis of Properties Behaviour of Cement-Based Grouts with High Substitution of Cement with Blast Furnace Slags

Advances in the Analysis of Properties Behaviour of Cement-Based Grouts with High Substitution of Cement with Blast Furnace Slags

Grouting Mechanism of Cement‐Based Slurry in a Concentric Annulus under High Groundwater Pressure

Postfracturing permeability prediction for CBM well with the analysis of fracturing pressure decline

Contact Info

Product

Resources

About