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Coagulation controllable type cement based pore sealing material and application method thereof

A composite cement and hole-sealing material technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of difficult matching of cement setting time, lagging of aluminum powder gas generation, and difficulties in actual construction, etc. Controlling, long-lasting swelling duration, and prolonged hydration time

Inactive Publication Date: 2016-12-07
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to ensure the strength of the cement material, about 10% of water-based epoxy resin needs to be added, which greatly increases the cost of the material
In addition, the aluminum powder gas lags behind, and the setting time of the cement is not easy to match, which brings difficulties to the actual construction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Preparation of a composite cement-based sealing material with controllable setting

[0019] ① Grind gypsum, slag, limestone, selected resin and sulphoaluminate cement clinker to a 0.08mm square hole sieve and store them in a single warehouse, and store Portland cement separately;

[0020] ② Mix the finely ground sulphoaluminate cement clinker with two or more resin polymer materials (phenolic resin, acrylic resin, latex powder, carboxymethyl cellulose, polyacrylamide, dextrin) for a total of 3.6 % mixing and grinding for 30min to obtain coated sulphoaluminate cement;

[0021] ③ 35% resin-coated sulfoaluminate cement and 38.7% Portland cement, 6% gypsum, 10% slag, 6% limestone, 3% bentonite, 0.3% industrial aluminum powder, 1.0% naphthalene-based water reducer Mixed for 25 minutes, bagged and sealed to obtain a composite cement-based sealing material with controllable condensation.

[0022] (2) Application method of a controllable setting composite cement-based sea...

Embodiment 2

[0027] (1) Preparation of a composite cement-based sealing material with controllable setting

[0028] ① Mix finely ground sulphoaluminate cement clinker with two or more resin polymer materials (phenolic resin, acrylic resin, latex powder, carboxymethyl cellulose, polyacrylamide, dextrin) for a total of 3.3 % mixing and grinding for 30min to obtain coated sulphoaluminate cement;

[0029] ② Mix 45% resin-coated sulfoaluminate cement with 34% Portland cement, 7% gypsum, 5% slag, 5% limestone, 3% bentonite, 0.2% industrial aluminum powder, and 0.8% melamine water reducer After 25 minutes, it was bagged and sealed to obtain a controllable condensation composite cement-based sealing material.

[0030] (2) Application method of a controllable setting composite cement-based sealing material

[0031] Mix the sealing material prepared above (1) with 60% water and stir evenly. Under standard conditions, the initial setting time (h:min) of the test slurry is 0:56; the final setting ti...

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Abstract

The invention relates to a coagulation controllable type cement based pore sealing material and application method thereof. A sulfoaluminate-silicate composite cement system with a certain ratio is adopted, a proper amount of industrial aluminum powder, a high efficient water reducer, and a resin type polymer material is added; an individual grinding technology is adopted, sulfoaluminate cement clinker and resin are grinded together at first so that fine resin particles can be adsorbed on the surface of the mineral particles in sulfoaluminate cement clinker; during the construction process, after the material is contacted with water, the resin wrapped on the surface of the clinker particles reacts with water to form a crosslinking coating film, the hydration of sulfoaluminate minerals is sustained-controlled therefore; the forming speed and forming amount of hydration products such as ettringite (Aft), hydrated aluminate, and the like can be adjusted; the setting time of sealing materials is effectively delayed; the construction becomes convenient, moreover, the sealing material can continuously and slightly expands in the sealed holes, a high early strength is provided for the material, the hydration shrinkage of silicate phase is compensated at the same time, and thus the pore sealing material can be used for a long time.

Description

technical field [0001] The present invention relates to a mining sealing material, in particular to a condensation-controllable composite cement-based early-strength, durable, expansion-delayed sealing material suitable for sealing holes in shale gas and coal mine gas drainage and its application method , Belongs to the technical field of mining. Background technique [0002] At present, the sealing materials mainly used in mining sealing at home and abroad are polyurethane foam materials and ordinary cement mortar. Polyurethane material belongs to chemical grouting material, its operation process is simple, the sealing speed is fast, the expansion ratio is high, and it has a certain sealing effect on coal cracks, so it is popular. However, the expansion effect of polyurethane products is easily affected by a series of reasons such as temperature, moisture, and compounding ratio, and the length of the sealing hole cannot reach the ideal sealing state, resulting in high seal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C09K8/467
CPCC04B28/06C04B2201/50C09K8/467C04B7/02C04B22/143C04B18/141C04B14/28C04B14/104C04B22/04C04B2103/302
Inventor 刘晓存李艳君孔德龙
Owner UNIV OF JINAN
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