阅读说明：本技术 一种半刚性复合改性注浆材料及其制备方法 (Semi-rigid composite modified grouting material and preparation method thereof ) 是由 丁永玲 孙华东 张爱勤 王保群 葛颜慧 匡芮 姜鹏 王彦敏 于 2019-11-19 设计创作，主要内容包括：本发明公开了一种半刚性复合改性注浆材料及其制备方法,属于土木工程材料技术领域。本发明的半刚性复合改性注浆材料,由以下组分按重量份数制备而成：48-53份高分子预聚物,0.15-0.4份稀释剂,3.7-6.8份水泥,21-28份煤矸石粉,41-49份水玻璃,2.9-3.8份交联剂,1.2-1.8份丁烯二醇,0.28-0.43份激发剂,0.3-0.7份乳化剂,0.1-0.2份催化剂。本发明的注浆材料对注浆环境的湿度没有要求,自身固化时间可控,固化成型后的胶体具有半刚性,浆液具有很好的可灌性和耐酸碱性。(The invention discloses a semi-rigid composite modified grouting material and a preparation method thereof, belonging to the technical field of civil engineering materials. The semi-rigid composite modified grouting material is prepared from the following components in parts by weight: 48-53 parts of high-molecular prepolymer, 0.15-0.4 part of diluent, 3.7-6.8 parts of cement, 21-28 parts of coal gangue powder, 41-49 parts of water glass, 2.9-3.8 parts of cross-linking agent, 1.2-1.8 parts of butylene glycol, 0.28-0.43 part of exciting agent, 0.3-0.7 part of emulsifier and 0.1-0.2 part of catalyst. The grouting material has no requirement on the humidity of the grouting environment, the self-curing time is controllable, the cured and molded colloid has semi-rigidity, and the slurry has good grouting property and acid and alkali resistance.)

1. The semi-rigid composite modified grouting material is characterized by being prepared from the following components in parts by weight: 48-53 parts of high-molecular prepolymer, 0.15-0.4 part of diluent, 3.7-6.8 parts of cement, 21-28 parts of coal gangue powder, 41-49 parts of water glass, 2.9-3.8 parts of cross-linking agent, 1.2-1.8 parts of butylene glycol, 0.28-0.43 part of exciting agent, 0.3-0.7 part of emulsifier and 0.1-0.2 part of catalyst;

the high molecular prepolymer is 16.7 percent of isocyanate group content and 420mPa & s of viscosity at 25 ℃;

the diluent is benzene compounds, lipid compounds or ketone compounds.

2. The semi-rigid composite modified grouting material of claim 1, characterized in that,

the high molecular prepolymer is prepared by dissolving an industrial-grade polyphenylpolymethylene polyisocyanate (PAPI) or diphenylmethane diisocyanate (MDI) material in an analytically pure acetone solvent, wherein the content of isocyanate groups is 16.7 percent, and the viscosity of the high molecular prepolymer is 420mPa & s at the temperature of 25 ℃;

the diluent is analytically pure benzene, toluene, xylene, ethyl acetate, butyl acetate, acetone or butanone.

3. The semi-rigid composite modified grouting material of claim 1 or 2, wherein the activator is azodiimidazolinylpropane.

4. The semi-rigid composite modified grouting material of claim 1 or 2, wherein the emulsifier is tween-80 or OP-9.

5. The semi-rigid composite modified grouting material of claim 1 or 2, wherein the catalyst is: tertiary amine compounds, stannous octoate, dibutyltin dilaurate, 1, 4-butanediol or dimorpholinodiethyl ether.

6. A preparation method of the semi-rigid composite modified grouting material as claimed in any one of claims 1 to 5, characterized by comprising the following steps:

1) at a fixed room temperature, adding a diluent into the high-molecular prepolymer, stirring to fully mix the high-molecular prepolymer, and placing the mixture marked as material I into a container for later use;

2) adding cement and coal gangue powder into water, and stirring to prepare mixed slurry for later use;

3) mixing water glass, a cross-linking agent, butylene glycol, an exciting agent, an emulsifying agent and a catalyst to obtain a mixture, adding the mixture into the mixed slurry prepared in the step 2), and stirring to obtain a material II, and taking out the material II for later use;

4) and finally, mixing the materials I and II, and fully stirring to obtain the composite modified grouting material.

7. The preparation method of the semi-rigid composite modified grouting material of claim 6,

the cement is strength C30 cement;

the coal gangue powder is red coal gangue or black coal gangue powder with 100 meshes and 200 meshes;

the water glass is industrial water glass;

the cross-linking agent is N-methylol acrylamide.

8. The preparation method of the semi-rigid composite modified grouting material of claim 7,

the water glass is industrial water glass with the modulus of 2.3-2.8;

the cross-linking agent is N-hydroxymethyl acrylamide with the purity of more than or equal to 98 percent;

the purity of the butenediol is more than or equal to 99%, and the viscosity of the butenediol at 20 ℃ is 21.8mPa & s;

the excitant is azodiimidazoline propane with the molecular weight of 323 and the purity of more than or equal to 98 percent;

the emulsifier is OP-9 with a hydroxyl value of 93mg KOH/g;

the catalyst is DMDEE with an amine value of 7.9-8.1 mmol/g and a purity of more than or equal to 99%.

Technical Field

The invention belongs to the technical field of civil engineering materials, and particularly relates to a semi-rigid composite modified grouting material and a preparation method thereof.

Background

The method aims to alleviate the contradiction between the increasing beautiful living needs of people and the unbalanced and insufficient development in the current stage, provides guarantee for the improvement of the national productivity development level, and the civil engineering and traffic infrastructure and other civil engineering industries of China are continuously developed, a large amount of concrete engineering is built, and due to the complexity of the engineering and the characteristics of materials, the concrete structures are inevitable to generate cracks, and the cracks seriously influence the durability and even the safety of the structures. The grouting material is mainly used for filling and consolidating stratum cracks or structure pores, can permeate into cracks which cannot be reached by manpower or machinery under the condition of self characteristics or pressurization by means of external force, is the key for realizing leakage stoppage or reinforcement, and plays a great role in foundation goaf filling, unfavorable geological modification, overground and underground concrete structure gap leakage stoppage, subgrade settlement grouting reinforcement, pavement structure crack filling and development and use of various grouting materials.

The inorganic grouting material has the advantages of low price, abundant and easily obtained materials, no toxic substances, no pollution to the environment and the like, is most widely used in grouting application, has the top use amount and mainly comprises cement paste, water glass and CS paste. The organic grouting material has high consolidation strength, good cohesive force, good chemical stability, adjustable setting time and extremely fine particles, can permeate micron-sized cracks to play a role, and mainly comprises acrylamides, epoxy resin pulp, urea-formaldehyde resin, lignins, polyurethanes and the like. The comprehensive performance of the grouting material belonging to water glass and polyurethane is particularly outstanding, however, in specific practical application, the application range of the water glass inorganic grouting material is narrow, the curing controllability is poor, the curing stability is poor, the mechanical property is low, the manufacturing cost of the polyurethane organic grouting material is high, the inflammability is high, the barrier property is poor, the thermal stability is poor, and the like, and certain defects exist gradually.

In practical application, the grouting material is not ideal like a laboratory, secondary strain displacement can be generated at a leaking stoppage gap under the synergistic effect of various external factors such as temperature, humidity and load under the complicated and variable grouting environment, so that higher requirements on the performance of the grouting material are provided, a high-efficiency and economic composite modified grouting material needs to be developed, the advantages of the two materials can be combined, the defects of the two materials are avoided, various performance requirement indexes of the grouting material are met, and meanwhile, the grouting material has certain semi-rigidity, and the grouting material can be applied to the field of special reinforcement engineering which generates the secondary strain displacement due to load disturbance or large temperature fluctuation and the like.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a semi-rigid composite modified grouting material and a preparation method thereof; the semi-rigid composite modified grouting material and the preparation method thereof are provided on the premise of fully referring to the prior technical information.

In order to achieve the purpose, the invention adopts the following technical scheme:

a semi-rigid composite modified grouting material is prepared from the following components in parts by weight: 48-53 parts of high-molecular prepolymer, 0.15-0.4 part of diluent, 3.7-6.8 parts of cement, 21-28 parts of coal gangue powder, 41-49 parts of water glass, 2.9-3.8 parts of cross-linking agent, 1.2-1.8 parts of butylene glycol, 0.28-0.43 part of exciting agent, 0.3-0.7 part of emulsifier and 0.1-0.2 part of catalyst;

the high molecular prepolymer is 16.7 percent of isocyanate group content and 420mPa & s of viscosity at 25 ℃;

the diluent is benzene compounds, lipid compounds or ketone compounds.

On the basis of the scheme, the high-molecular prepolymer is prepared by dissolving an industrial-grade polyphenol polymethylene polyisocyanate (PAPI) or diphenylmethane diisocyanate (MDI) material in an analytically pure acetone solvent to obtain a high-molecular prepolymer with the isocyanate group content of 16.7 percent and the viscosity of 420mPa & s at 25 ℃;

the diluent is analytically pure benzene, toluene, xylene, ethyl acetate, butyl acetate, acetone or butanone.

On the basis of the scheme, the excitant is azodiimidazolinyl propane.

On the basis of the scheme, the emulsifier is tween-80 or OP-9.

On the basis of the scheme, the catalyst is as follows: tertiary amine compounds, stannous octoate, dibutyltin dilaurate, 1, 4-butanediol or dimorpholinodiethyl ether.

On the basis of the scheme, the preparation method of the semi-rigid composite modified grouting material comprises the following steps:

1) at a fixed room temperature, adding a diluent into the high-molecular prepolymer, stirring to fully mix the high-molecular prepolymer, and placing the mixture marked as material I into a container for later use;

2) adding cement and coal gangue powder into water, and stirring to prepare mixed slurry for later use;

3) mixing water glass, a cross-linking agent, butylene glycol, an exciting agent, an emulsifying agent and a catalyst to obtain a mixture, adding the mixture into the mixed slurry prepared in the step 2), and stirring to obtain a material II, and taking out the material II for later use;

4) and finally, mixing the materials I and II, and fully stirring to obtain the composite modified grouting material.

On the basis of the above-mentioned scheme,

the cement is strength C30 cement;

the coal gangue powder is red coal gangue or black coal gangue powder with 100 meshes and 200 meshes;

the water glass is industrial water glass;

the cross-linking agent is N-methylol acrylamide.

On the basis of the above-mentioned scheme,

the water glass is industrial water glass with the modulus of 2.3-2.8;

the cross-linking agent is N-hydroxymethyl acrylamide with the purity of more than or equal to 98 percent;

the purity of the butenediol is more than or equal to 99%, and the viscosity of the butenediol at 20 ℃ is 21.8mPa & s;

the excitant is azodiimidazoline propane with the molecular weight of 323 and the purity of more than or equal to 98 percent;

the emulsifier is OP-9 with a hydroxyl value of 93mg KOH/g;

the catalyst is DMDEE with an amine value of 7.9-8.1 mmol/g and a purity of more than or equal to 99%.

Compared with the prior art, the invention has the following advantages:

1. the grouting material has no requirement on the humidity of a grouting environment, is suitable for plugging with water, can absorb the water at the crack in the solidification process, still has certain expansibility when meeting water after the solidification is finished, and solves the problem of secondary rebound.

2. The self-curing time can be controlled between 1min and 30min, and the self-curing agent can be flexibly applied according to the situation.

3. The cured and formed colloid has semi-rigidity and can still have good leaking stoppage effect when the crack structure expands and contracts.

4. The slurry has good grouting property, can permeate micron-sized fine gaps, and can reach a permeation range of 3 meters under the action of pressure of grouting equipment.

5. Has good acid and alkali resistance and is not affected by various biological attacks.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it is to be understood that when the terms "comprises" and/or "comprising" are used in this specification, which specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, the method of the present invention will be described in detail below with reference to specific embodiments.