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High-strength, quick-setting and expansive type multipurpose grouting material and preparation and application methods thereof

A grouting material and high-strength technology, applied in the field of mine safety production, can solve the problems of failure to meet the requirements of grouting and plugging in mine safety production, difficulty in increasing the strength in the later stage, and low expansion rate, and reduce bleeding and segregation. Inexpensive and the effect of increasing the expansion coefficient

Active Publication Date: 2021-06-11
PANJIANG COAL & ELECTRICITY GROUP INSITUTE OF COAL MINING DESIGN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The grouting material produced by this formula has high early strength after setting, but it is basically difficult to increase the later strength, and the expansion rate is low, which cannot meet the plugging requirements of mine safety production such as grouting and filling.

Method used

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  • High-strength, quick-setting and expansive type multipurpose grouting material and preparation and application methods thereof

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preparation example Construction

[0041] The preparation method of described modified air-entraining agent comprises the following steps:

[0042] C1: The common metal powder air-entraining agent and sodium lauryl sulfate surfactant solution are fully stirred for 1 hour according to the mass ratio of 1:1, and the mixed material is obtained after mixing evenly;

[0043] C2: Put the obtained mixed material into a vacuum drying oven for low-temperature drying, the drying temperature is not higher than 30 degrees Celsius, and the drying time is greater than 8 hours;

[0044] C3: The dried mixed material is put into a closed type pulverizing sample making machine to fully grind and pulverize to prepare a modified air-entraining agent, and the modified air-entraining agent is 400-1000 mesh.

[0045] Preferably, the double-fast cement adopts 42.5 type, and the final setting time is 10 minutes to reduce the setting time of the grouting material, and the ordinary Portland cement type is 425# or 525#.

[0046] Preferab...

Embodiment 1

[0054] Configure a high-strength, quick-setting, expansive multi-purpose grouting material, including the following components: double-fast cement: 60%; ordinary Portland cement: 30%; water-retaining agent: 0.1%; water-reducing agent: 0.15% ; Modified air-entraining agent: 0.15%; Composite dispersant: 0.05%; Industrial cellulose: 0.05%; Quicklime: 4.5%; Bentonite: 5%.

[0055] Preparation method and application: The above-mentioned raw materials and water are evenly mixed in a weight ratio of 0.7:1, and the obtained slurry is used for grouting and plugging cracks where toxic and harmful gases such as gas and carbon monoxide gush out.

Embodiment 2

[0057] Configure a high-strength, quick-setting, expansive multi-purpose grouting material, including the following components: double-fast cement: 55%; ordinary Portland cement: 45%; water-retaining agent: 0.1%; water-reducing agent: 0.15% ; Modified air-entraining agent: 0.1%; Composite dispersant: 0.05%; Industrial cellulose: 0.1%; Quicklime: 5%; Bentonite: 4.5%.

[0058] Preparation method and application: The above-mentioned raw materials and water are uniformly mixed in a weight ratio of 0.8:1, and the obtained slurry is used for efficient sealing of gas drainage boreholes and gas pressure measurement boreholes.

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Abstract

The invention discloses a high-strength, quick-setting and expansive type multipurpose grouting material, which comprises the following components: 45-60% of quick-setting and quick-setting cement; 30%-45% of ordinary Portland cement; 0.05%-0.15% of a water retaining agent; 0.10%-0.25% of a water reducing agent; 0.01%-0.15% of a modified air entraining agent; 0.05%-0.15% of a composite dispersant; 0.05%-0.15% of industrial cellulose; 4%-6% of quick lime; and 3.5%-6% of bentonite. The grouting material and water are mixed according to the water-cement ratio of 0.6-1 to prepare slurry, and the slurry is used for consolidation of broken surrounding rock bodies, grouting plugging of gas and carbon monoxide poisonous and harmful gas gushing cracks, efficient sealing of gas extraction drill holes and gas pressure measurement drill holes and plugging of mine leakage water cracks. The concrete has the advantages of high strength, large expansion, good fluidity, rapid hardening, compactness, low permeability and the like, and is low in price and cost-saving.

Description

technical field [0001] The invention belongs to the technical field of mine safety production, and in particular relates to a high-strength, quick-setting, expansion-type multi-purpose grouting material and its preparation and application methods. Background technique [0002] The grouting method is an indispensable construction method for mine safety mining to control mine disasters. It has been widely used in roadway surrounding rock reinforcement, gas control, mine water prevention and control, goaf fire prevention and other application fields. The quality of grouting in the above fields determines whether mines can be mined safely and efficiently, and the quality of grouting materials is a key factor in determining the quality of grouting construction, and its performance is particularly important. [0003] At present, the grouting materials used by mining enterprises are mainly organic expansion materials and ordinary cement materials. At this stage, domestic large-sca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B111/70
CPCC04B28/04C04B2201/50C04B2111/70C04B22/16C04B24/383C04B14/104C04B22/064C04B22/04C04B24/16C04B2103/0054C04B2103/302
Inventor 罗卫东蒋中承唐勇杨乘任青山
Owner PANJIANG COAL & ELECTRICITY GROUP INSITUTE OF COAL MINING DESIGN
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