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Anti-bleeding polymer, low-retraction filling solid waste material, preparation method and application

A technology of polymers and polymer particles, which is applied in the field of low shrinkage filling solid waste materials and preparation, and anti-bleeding polymers, to achieve the effects of improving strength, increasing the rate of connection, and increasing the amount of production

Active Publication Date: 2020-12-18
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the inventors found that none of the above methods significantly improved the performance of the filling material in terms of bleeding rate, filling volume shrinkage, and easy cracking, and these properties are critical to whether the gelled filling material meets the safety and engineering requirements in the actual application process. very important

Method used

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  • Anti-bleeding polymer, low-retraction filling solid waste material, preparation method and application
  • Anti-bleeding polymer, low-retraction filling solid waste material, preparation method and application
  • Anti-bleeding polymer, low-retraction filling solid waste material, preparation method and application

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preparation example Construction

[0055] In a second aspect, the present invention provides a method for preparing the anti-bleeding polymer, comprising the steps of:

[0056] preparing an acrylic acid solution, adding acrylamide to it to obtain a hydrophilic monomer solution;

[0057] Add a crosslinking agent to the hydrophilic monomer solution, mix and dissolve, then add an initiator therein, heat up and polymerize to form a polymer gel;

[0058] Grinding the polymer gel into particles, and adding sodium hydroxide solution to it for neutralization reaction;

[0059] drying the neutralized gel particles, further pulverizing and sieving to obtain primary anti-bleeding polymer particles;

[0060] The surface crosslinking agent solution is sprayed on the surface of the primary anti-bleeding polymer particles, and dried to obtain the final product.

[0061] In some embodiments, the mass percentage of acrylic acid in the acrylic acid solution is 10%-70%. Because as the concentration of acrylic acid increases, e...

Embodiment 1

[0091] An anti-retraction filling solid waste material and a preparation method thereof, comprising the following steps:

[0092] Step 1: Weigh raw materials by mass fraction, including 500 parts of fly ash, 500 parts of blast furnace slag, 30 parts of water glass, 100 parts of Portland cement, 300 parts of water, 10 parts of sodium hydroxide, anti-bleeding polymer 5 servings. Wherein the synthetic preparation method of anti-bleeding polymer is as follows:

[0093] Step 2: take 300g of acrylic acid and dilute it into an acrylic acid solution with a mass fraction of 40%, add 100g of acrylamide, fully stir to dissolve it, and obtain a hydrophilic monomer solution A;

[0094] Add 3g of cross-linking agent to the above-mentioned obtained hydrophilic monomer solution A, fully stir to dissolve it;

[0095] Add 3g of ammonium persulfate, stir well to dissolve it, start the polymerization reaction by raising the temperature to 70°C externally, and let it stand for 1 hour to form a p...

Embodiment 2

[0120] An anti-retraction filling solid waste material and a preparation method thereof, comprising the following steps:

[0121] Step 1: Weigh raw materials by mass fraction, including 700 parts of fly ash, 500 parts of blast furnace slag, 50 parts of water glass, 200 parts of Portland cement, 400 parts of water, 100 parts of sodium hydroxide, anti-bleeding polymer 8 servings. Wherein the synthetic preparation method of anti-bleeding polymer is as follows:

[0122] Step 2: take 300g of acrylic acid and dilute it into an acrylic acid solution with a mass fraction of 50%, add 100g of acrylamide, stir well to dissolve it, and obtain a hydrophilic monomer solution B;

[0123] Add 0.6 g of cross-linking agent to the hydrophilic monomer solution B obtained above, stir well to dissolve it;

[0124] Add 1g of potassium persulfate as an initiator, stir well to dissolve, heat up to 90°C externally to initiate polymerization, and let it stand for 1 hour to form a polymer gel;

[0125...

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Abstract

The invention discloses an anti-bleeding polymer, a low-retraction filling solid waste material, a preparation method and an application. The anti-bleeding polymer is at least prepared from the following components: acrylic acid, acrylamide, an initiator, a cross-linking agent, deionized water, sodium hydroxide and a surface cross-linking agent. The low-retraction filling solid waste material is prepared from the following components in parts by weight: 500-1000 parts of fly ash, 500-1000 parts of blast furnace slag, 30-300 parts of water glass, 0-500 parts of Portland cement, 300-1200 parts of water, 10-1000 parts of sodium hydroxide and 2-20 parts of an anti-bleeding polymer. Aiming at the volume retraction phenomenon of a common solid waste cementing material caused by the bleeding problem in the hydration reaction process, the invention provides an anti-bleeding polymer, so that the retraction of the solid waste grouting material caused by bleeding is effectively reduced, and the roof contact rate of the solid waste grouting material to coal mine filling is improved; the anti-bleeding polymer can guarantee the humidity environment of the solid waste cementing material in the hydration process by slowly releasing water, the generation amount of C-SH is increased, and therefore the strength of a solidified body is improved.

Description

technical field [0001] The invention belongs to the technical field of coal mine filling materials for underground engineering, and in particular relates to an anti-bleeding polymer, a low-retraction filling solid waste material, a preparation method and an application thereof. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily regarded as an acknowledgment or in any form to imply that the information constitutes the prior art already known to those skilled in the art. [0003] Bulk solid waste materials mainly include fly ash and slag, which are mainly produced in the process of coal power generation, desulfurization and dust collection, metal smelting, metal mining and other processes. The output of bulk solid waste in my country is large, and the utilization task is arduous. Statistics show that my country produces an av...

Claims

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Application Information

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IPC IPC(8): C08F220/06C08F220/56C08F222/38C08J3/24C04B28/26C04B24/26C08L33/02
CPCC08F220/06C08J3/245C04B28/26C04B24/2688C08J2333/02C08F220/56C08F222/385C04B18/08C04B18/141C04B7/02C04B22/002C04B22/062
Inventor 刘人太马晨阳陈孟军张庆松王振军段少龙陈一航路佩佩张志朋邓闰槐
Owner SHANDONG UNIV
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