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A controlled-release hydrated aluminate cement-based early-strength and durable sealing material and its 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 the problems of difficult matching of cement setting time, lag of aluminum powder gas generation, and practical construction difficulties, etc. To achieve the effects of controllable setting time, durable swelling duration and delayed hydration time

Inactive Publication Date: 2018-02-23
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

[0017] (1) Preparation of a controlled-release hydrated aluminate cement-based early-strength and durable sealing material

[0018] ① Grind gypsum, slag, limestone, selected resin and aluminate cement clinker to a 0.08mm square-hole sieve to less than 10%, and store them in a single warehouse, and store Portland cement separately;

[0019] ② The finely ground aluminate cement clinker and two or more resinous polymer materials (phenolic resin, acrylic resin, latex powder, carboxymethyl cellulose, polyacrylamide, dextrin) total 3.5% Mix and grind for 30 minutes to obtain coated aluminate cement; 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 were mixed for 25 minutes, bagged and sealed to obtain a controlled-release hydrated aluminate cement-based early-strength and durable sealing material.

[0020] (2) Application method of a controlled...

Embodiment 2

[0025] (1) Preparation of a controlled-release hydrated aluminate cement-based early-strength and durable sealing material

[0026] 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; 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 superplasticizer were mixed for 25 minutes, bagged and sealed to obtain a controlled-release hydrated aluminate cement-based early-strength and durable sealing material.

[0027] (2) Application method of a controlled-release hydrated aluminate cement-based early-strength and durable sealing material

[0028] Mix the sealing material prepared in the above (1) with 55% water, and stir evenly. Under standard conditions, the...

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Abstract

The invention relates to a controlled-release hydrated aluminate cement-based early-strength and durable sealing material and an application method thereof. The sealing material of the invention has controllable condensation, is easy to construct, and has sufficient gas generation and expansion. A certain ratio of aluminate-silicate composite cement system is adopted, and an appropriate amount of aluminum powder and resin polymer materials are added. Using the separate grinding technology, the aluminate cement clinker and the resin are firstly ground together, so that the fine resin particles are adsorbed on the surface of the mineral particles of the aluminate cement clinker. After the material is in contact with water during construction, the resin wrapped on the surface of the clinker particles will interact with water to form an interwoven coating film, which can slow release and control the hydration of aluminate minerals, and regulate the formation of products such as ettringite and hydrated aluminate The speed and amount of formation can effectively delay the setting time of the sealing material, facilitate construction, and endow the sealing material with continuous micro-expansion in the sealing hole, provide the material with high early strength and compensate for the hydration shrinkage of the silicate phase, making the sealing material The porous material is designed to last and last.

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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Patent Type & Authority Patents(China)
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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