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A direct plugging fiber grouting material and preparation method thereof

A technology of grouting materials and fibers, which is applied in the field of grouting materials, can solve the problems of difficult to effectively control the expansion range and loss, difficult to control the surface settlement after injection, and low consolidation strength, so as to improve the anti-erosion performance and good anti-seepage Consolidation ability, the effect of improving the connection performance

Inactive Publication Date: 2019-03-26
LIAONING TECHNICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the existing hardenable grouting materials at home and abroad have shortcomings such as low post-consolidation strength, high bleeding rate, and difficult to effectively control the expansion range and loss, which eventually lead to difficulties in grouting and difficult control of surface settlement after injection. Insufficient strength and other problems can lead to serious grouting failure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A fiber grouting material for direct plugging, which is composed of the following materials in terms of weight percentage: Portland cement 20%, water glass 45%, fly ash 5%, water 25%, basalt fiber 3%, phosphate inorganic retarder Coagulant 2%.

[0019] The preparation method of the direct plugging fiber grouting material comprises the following steps:

[0020] According to the above mass ratio, the fly ash is firstly divided into two equal parts, one part is uniformly mixed with basalt fiber, Portland cement and water to obtain mixed solution 1, and the other part is uniformly mixed with water glass to obtain mixed solution 2; Slowly pour liquid two into mixed liquid one and mix evenly. The stirring speed is 50r / min, the stirring time is 5min, and the temperature of the mixing system is 20°C. S, the stone rate is above 75%, and the uniaxial compressive strength is above 4MPa-10MPa.

Embodiment 2

[0022] A direct plugging fiber grouting material, which is composed of the following substances in terms of weight percentage: Portland cement 18%, water glass 43%, slag 8%, water 26%, basalt fiber 4%, phosphate inorganic retarder 1%.

[0023] The mass percent of described slag is composed of: SiO 2 42%, Al 2 o 3 11.6%, CaO 32%, MgO 3.1%, and the rest are metal oxides of iron and sulfur.

[0024] The preparation method of the direct plugging fiber grouting material comprises the following steps:

[0025] According to the above mass ratio, the fly ash is firstly divided into two equal parts, one part is uniformly mixed with basalt fiber, Portland cement and water to obtain mixed solution 1, and the other part is uniformly mixed with water glass to obtain mixed solution 2; Slowly pour liquid two into mixed liquid one and mix evenly. The stirring speed is 40r / min, the stirring time is 5min, and the temperature of the mixing system is 25°C. S, the stone rate is above 75%, a...

Embodiment 3

[0027] A direct plugging fiber grouting material, which is composed of the following materials in terms of weight percentage: Portland cement 20%, water glass 40%, fly ash 10%, water 26%, basalt fiber 3%, phosphate inorganic retarder Coagulant 1%.

[0028] The preparation method of the direct plugging fiber grouting material comprises the following steps:

[0029] According to the above mass ratio, the fly ash is firstly divided into two equal parts, one part is uniformly mixed with basalt fiber, Portland cement and water to obtain mixed solution 1, and the other part is uniformly mixed with water glass to obtain mixed solution 2; Liquid two is slowly poured into mixed liquid one and mixed evenly. The stirring speed is 60r / min, the stirring time is 3min, and the temperature of the mixing system is 25°C. The fiber grouting material is obtained. S, the stone rate is above 75%, and the uniaxial compressive strength is above 2MPa.

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Abstract

The invention provides a direct leaking stoppage fiber grouting material and a preparation method thereof. The fiber grouting material is prepared from the following substances in percentage by weight: 15 to 20 percent of Portland cement, 40 to 45 percent of sodium silicate, 5 to 10 percent of fly ash or mineral waste residues, 25 to 30 percent of water, 3 to 4 percent of basalt fibers and 1 to 2 percent of retarder. The preparation method comprises the following steps: equally dividing the fly ash or the mineral waste residues into two parts according to the mass ratio; uniformly mixing one part of the fly ash or the mineral waste residues with the basalt fibers, the Portland cement and the water to obtain a mixed solution I; uniformly mixing the other part of the fly ash or the mineral waste residues with the sodium silicate to obtain a mixed solution II; slowly pouring the mixed solution II into the mixed solution I for uniformly mixing to obtain the fiber grouting material. The fiber grouting material provided by the invention can meet the requirements on three properties, namely groutability, controllability and permeability resistance, also has the advantages of high setting rate, high long-term strength and the like at the same time, and has a broad application prospect in related fields such as goaf, roads and foundation treatment.

Description

technical field [0001] The invention belongs to the technical field of grouting materials, and in particular relates to a direct plugging fiber grouting material and a preparation method thereof. Background technique [0002] Direct plugging and grouting technology is a new technology emerging in our country in the 1980s. The plugging principle is to determine the grouting point with good connectivity with the leaking water site as the grouting hole according to the hydrogeological data and the pressure water connection test, and enter the dominant water-bearing fracture. When the slurry encounters the dominant water, it will flow in the opposite direction of the pressure gradient, that is, flow forward to the leakage point. When the plugging material flows to the water outlet point, according to the set time, the plugging material just gels at this time, stop the pump to complete the grouting, complete the plugging process, and achieve the water plugging mechanism of inter...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/26C04B111/70
CPCC04B28/26C04B2111/00293C04B2111/70C04B2201/10C04B2201/50C04B7/02C04B14/46C04B18/08C04B22/16C04B18/141
Inventor 张彬孙彦增赵文华姜明阳周军霞顾云
Owner LIAONING TECHNICAL UNIVERSITY
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