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Early strength durable hole sealing material based on hydration controlled-release aluminate cement and application method

A technology of aluminate cement and sealing material, which is applied in chemical instruments and methods, cement mixing devices, clay processing equipment, etc., can solve problems such as difficult matching of cement setting time, difficulty in actual construction, lagging of aluminum powder gas generation, etc. Achieve the effects of controllable setting time, delayed hydration time, and durable swelling duration

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 controlled-release hydrated aluminate cement-based early-strength and durable sealing material

[0019] ① Grind the gypsum, slag, limestone, selected resin and aluminate cement clinker to the 0.08mm square hole sieve to less than 10% and store them in a single warehouse, and store the Portland cement separately;

[0020] ② Mix the finely ground aluminate cement clinker with two or more resin polymer materials (phenolic resin, acrylic resin, latex powder, carboxymethyl cellulose, polyacrylamide, dextrin) in a total of 3.5% Mix and grind for 30 minutes to obtain coated aluminate cement;

[0021] ③ Mix 40% resin-coated aluminate cement with 35.7% Portland cement, 6% gypsum, 9% slag, 5% limestone, 3% bentonite, 0.3% industrial aluminum powder, and 1.0% naphthalene-based water reducer After 25 minutes, it was bagged and sealed to obtain a controlled-release hydrated aluminate cement-based early-strength and durable sealing material.

[0022] (2) Applic...

Embodiment 2

[0027] (1) Preparation of a controlled-release hydrated aluminate cement-based early-strength and durable sealing material

[0028] ① Mix the finely ground aluminate cement clinker with two or more resin polymer materials (phenolic resin, acrylic resin, latex powder, carboxymethyl cellulose, polyacrylamide, dextrin) in a total of 3.2% Mix and grind for 30 minutes to obtain coated aluminate cement;

[0029] ② Mix 45% resin-coated aluminate cement with 35% Portland cement, 7% gypsum, 5% slag, 4% limestone, 3% bentonite, 0.2% industrial aluminum powder, and 0.8% melamine water reducer for 25 minutes , bagged and sealed to prepare a controlled-release hydrated aluminate cement-based early-strength and durable sealing material.

[0030] (2) Application method of a controlled-release hydrated aluminate cement-based early-strength and durable sealing material

[0031] Mix the sealing material prepared above (1) with 55% water and stir evenly. Under standard conditions, the initial ...

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Abstract

The invention relates to an early strength durable hole sealing material based on hydration controlled-release aluminate cement and an application method. The sealing material is controllable in condensation, easy to construct and sufficient in gas expansion. An aluminate-silicate composite cement system with a certain matching ratio is adopted, and an appropriate amount of aluminum powder and resin high polymer materials are added. A grinding technology is adopted for preferentially grinding aluminate cement clinker and resin, and micro resin particles are adsorbed to the surfaces of mineral particles of the aluminate cement clinker. In the construction process, after the materials make contact with water, resin wrapping the surface of the clinker particle surfaces reacts with water to form an interwoven coating film, slow release control over hydration of aluminate mineral can be achieved, the forming speed and amount of ettringite, hydrated aluminate and other products are adjusted, the setting time of the sealing material can be effectively delayed, construction is convenient, the sealing material is allowed to be continuously expanded in a sealed hole, high early strength is provided for the material, hydration shrinkage of a silicate phase is compensated for, and the hole sealing material can be continuously and durably used.

Description

technical field [0001] The invention relates to a mining sealing material, in particular to a controlled-release hydrated aluminate cement-based early-strength, durable, expansion-delayed sealing material suitable for drilling holes in shale gas and coal mine gas drainage and its The 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 sealing...

Claims

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Application Information

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IPC IPC(8): C04B28/06B28C1/18B28C5/00
CPCB28C1/18B28C5/00C04B28/06C04B2201/05C04B7/02C04B22/143C04B18/141C04B22/064C04B14/104C04B22/04C04B2103/302C04B24/24
Inventor 刘晓存李艳君孔德龙
Owner UNIV OF JINAN
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