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Rock crack grouting material prepared from cement stone phase and preparation method of grouting material

A grouting material and cement stone technology, which is applied in the field of rock mass crack grouting engineering, can solve the problems that the environmental load cement stone components are not effectively utilized and the economic cost is high, and achieve high stone rate, low cost and good stability. Effect

Active Publication Date: 2018-08-31
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the use of waste concrete is mainly used as building foundation padding materials or the production of recycled aggregates, but the cement stone component, which has the highest economic cost and the heaviest environmental load, has not been effectively utilized

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1: Mining fracture grouting material prepared from cement stone phase and its preparation process.

[0034] Components: 50% cement stone phase (hardened cement stone powder separated from waste concrete), 25% unspontaneously combusted coal gangue, 25% waste incineration slag, polycarboxylic acid accounting for 0.5-1% by mass of the powder material Water reducing agent. Its preparation process includes crushing and grinding mixing process, calcination process and pulping process, and the specific method process is as follows:

[0035] (1) Crushing and grinding mixing process: crush non-spontaneous coal gangue and waste incineration slag to a particle size of less than 5mm, and then combine the hardened cement stone powder separated from waste concrete with the crushed non-spontaneous combustion gangue, Waste incineration slag is added to the ball mill in proportion to be mixed and ground to the particle fineness of ultra-fine cement, the maximum particle size is...

Embodiment 2

[0039] Example 2: Mining fracture grouting material prepared from cement stone phase and its preparation process.

[0040] Components: 40% cement stone (hardened cement stone powder separated from waste concrete), 30% non-spontaneously combusted coal gangue, 30% waste incineration slag, 0.5-1% polycarboxylate reducing powder material mass percentage Aqua. Its preparation process is as follows:

[0041](1) Crushing and grinding mixing process: crush non-spontaneous coal gangue and waste incineration slag to a particle size of less than 5mm, and then combine the hardened cement stone powder separated from waste concrete with the crushed non-spontaneous combustion gangue, Waste incineration slag is added to the ball mill in proportion to be mixed and ground to the particle fineness of ultra-fine cement, the maximum particle size is 10.825 μm, and the average particle size is 3.201 μm;

[0042] (2) Calcination process: the mixture is calcined at a low temperature by using the co...

Embodiment 3

[0045] Example 3: Mining fracture grouting material prepared from cement stone phase and its preparation process.

[0046] Components: 60% of cement stone, 25% of non-spontaneously combusted coal gangue, 15% of garbage incineration slag, and 0.5-1% of the mass percentage of the powder material is a polycarboxylate superplasticizer. Its preparation process is as follows:

[0047] (1) Crushing and grinding mixing process: crush non-spontaneous coal gangue and waste incineration slag to a particle size of less than 5mm, and then combine the hardened cement stone powder separated from waste concrete with the crushed non-spontaneous combustion gangue, Waste incineration slag is added to the ball mill in proportion to be mixed and ground to the particle fineness of ultra-fine cement, the maximum particle size is 11.476 μm, and the average particle size is 3.266 μm;

[0048] (2) Calcination process: The mixture is calcined at a low temperature by using the combustion heat energy of ...

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PUM

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Abstract

The invention discloses a method for preparing a mining crack grouting material by utilizing a cement stone phase in waste concrete. The mining crack grouting material includes the following raw materials in percentages by weight: 40-60% of the cement stone phase, 20-30% of coal gangue, 10%-30% of furnace slag, and a water reducing agent which is 0.5-1% by mass of powder. The mining crack groutingmaterial disclosed by the invention adopts an ultra-fine cement stone regenerated cementing material as a substrate material, is supplemented by other materials, and has the advantages of ultrafine particles, a high hardening rate, micro expansion performance, a low water separating rate and good stability; and when a water-cement ratio is 1:1, 28-day compressive strength can reach 15 MPa or more. The mining crack grouting material disclosed by the invention overcomes the defects that ordinary Portland cement grouting slurry has a large water separating rate, poor stability and longer coagulation time, and is not easily poured into micro cracks, and production pollutes the environment, consumes a large amount of energy resources and resources, and has high costs; and the method disclosedby the invention is green and environmentally friendly, and has low costs.

Description

technical field [0001] The invention relates to a rock mass fissure grouting material and a preparation method thereof, in particular to a mining fissure grouting material prepared from cement stone phase and a preparation method thereof, belonging to the field of rock mass fissure grouting engineering. Background technique [0002] Grouting water blocking is one of the important means to prevent and control water damage in coal mines. In the deep mining process of coal mines in northern my country, when faced with the threat of various limestone water hazards, two measures are currently being taken, one is drainage and pressure reduction. This method is limited by the protection of the water environment and the increase in the cost of coal per ton. The second is grouting reconstruction and reinforcement, that is, the grouting reinforcement reconstruction is carried out on the floor water-resisting layer threatened by the limestone water at the bottom to increase its anti-see...

Claims

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Application Information

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IPC IPC(8): C04B28/02C04B111/70
CPCC04B28/02C04B2111/00017C04B2111/00672C04B2111/00724C04B2111/70C04B2201/50C04B18/10C04B18/12C04B2103/302
Inventor 姬永生吴守荣张领雷刘本琳张莉石博文徐圣楠杨凯中杨广
Owner CHINA UNIV OF MINING & TECH
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