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Bentonite-based grouting material and preparation method thereof

A technology of grouting material and bentonite, which is applied in the field of building construction materials, can solve problems such as water inrush, water inrush disasters, unstable reinforcement effect, uneven diffusion, etc. excellent permeability

Inactive Publication Date: 2018-10-26
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the traditional cement-sodium silicate slurry still has some shortcomings, such as uneven diffusion in the sand and pebble formation, resulting in unstable reinforcement effect and unsatisfactory anti-seepage effect
Taking the Beijing subway tunnel project as an example, water-rich sand and pebble strata are often encountered. The self-stability of this stratum is poor. Traditional cement-sodium silicate grout is used as the grouting material, and water inrush and gushing disasters often occur. The cost and risk are high, which seriously affects Construction progress, resulting in economic losses

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The bentonite-based grouting material includes the following components (in parts by mass):

[0026] 35 parts of bentonite, 65 parts of cement, 150 parts of water, 1.05 parts of dispersant, 76 parts of water glass, wherein, described water glass is the sodium water glass that Baume degree is 35 ° of Bé, and described bentonite is sodium bentonite, so The cement used is P.O 42.5 ordinary Portland cement.

[0027] Its preparation method comprises the following steps (in parts by mass):

[0028] (1) Add 35 parts of bentonite, 65 parts of cement, and 1.05 parts of sodium carbonate dispersant to 150 parts of water, and stir evenly to obtain liquid A;

[0029] (2) Water glass is used as liquid B, and the water glass adopts sodium water glass whose Baume degree is 35°Bé;

[0030] (3) Mix liquid A and liquid B uniformly at a volume ratio of 1:0.4 to obtain the bentonite-based grouting material.

[0031] At the project site, the original grouting material was used for constru...

Embodiment 2

[0034] The bentonite-based grouting material includes the following components, in parts by mass:

[0035] 40 parts of bentonite, 60 parts of cement, 150 parts of water, 1.2 parts of dispersant, 40 parts of water glass, wherein, described water glass is the sodium water glass that Baume degree is 35 ° of Bé, and described bentonite is sodium bentonite.

[0036] Its preparation method comprises the following steps, in parts by mass:

[0037] (1) Add 40 parts of bentonite, 60 parts of cement, and 1.2 parts of sodium carbonate dispersant into water, and stir evenly to obtain liquid A;

[0038] (2) Add water into the water glass, stir evenly to obtain liquid B, and the water glass adopts sodium water glass with a Baume degree of 35°Bé;

[0039] (3) Mix liquid A and liquid B uniformly at a volume ratio of 1:1 to obtain the bentonite-based grouting material.

[0040] Since the pumping ratio of liquid A and liquid B of the grouting machine currently used on the construction site ca...

Embodiment 3

[0045] The bentonite-based grouting material includes the following components, in parts by mass:

[0046] 20 parts of bentonite, 80 parts of cement, 120 parts of water, 0.6 part of dispersant, 167 parts of water glass, wherein, described water glass is the sodium water glass that Baume degree is 35 ° of Bé, and described bentonite is sodium bentonite.

[0047] Its preparation method comprises the following steps (in parts by mass):

[0048] (1) Add 20 parts of bentonite, 80 parts of cement, and 0.6 parts of sodium carbonate dispersant into water, and stir evenly to obtain liquid A;

[0049] (2) Add water to 167 parts of sodium water glass with a Baume degree of 35°Bé, stir evenly to obtain liquid B;

[0050] (3) Mix liquid A and liquid B uniformly at a volume ratio of 1:1 to obtain the bentonite-based grouting material.

[0051] (4) On the premise of keeping the total amount of water added in the above step (1) and step (2) unchanged at 120 parts, adjust the amount of water...

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Abstract

The invention relates to the field of materials for building construction, in particular to a bentonite-based grouting material and a preparation method thereof. The bentonite-based grouting materialis prepared from the following components in parts by mass: 20-50 parts of bentonite, 50-80 parts of cement, 120-160 parts of water and 40-200 parts of water glass. The bentonite with a high proportion is introduced to existing cement-water glass slurry to serve as a stabilizer, and the grouting material with low cost, good stability and high impermeability is prepared. Through experimental studyon the bentonite-based grouting material, an optimal proportion is determined, and the feasibility of the bentonite-based grouting technology is analyzed theoretically. Compared with conventional cement-water glass grouting materials, the bentonite-based grouting material has the characteristics of high stability, low cost, environment protection, convenience in material acquisition and high impermeability, and has a good water plugging effect, thereby having a wide development and application prospect in water-rich sandy gravel stratums.

Description

technical field [0001] The invention relates to the field of building construction materials, in particular to a bentonite-based grouting material and a preparation method thereof. Background technique [0002] Grouting technology has been widely used in transportation, water conservancy, construction and other engineering fields as a water-stopping reinforcement measure. Among them, the reasonable selection of grouting materials is the key factor for the sealing of grouting technology. At present, cement-sodium silicate double-liquid grouting is often used Material. Cement-sodium silicate double-fluid grouting material has the characteristics of short and adjustable gelation time and high calculus rate. It can achieve the purposes of rapid water stoppage, leakage plugging and reinforcement, and is widely used in subway tunnel projects. [0003] However, the traditional cement-sodium silicate slurry still has some shortcomings, such as uneven diffusion in the sand and pebbl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/26C04B111/70C04B111/27
CPCC04B28/26C04B2111/00724C04B2111/27C04B2111/70C04B14/104C04B22/10C04B7/02C04B7/00
Inventor 王贵和周瑶原钰斐
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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