CN115196932B - Low-carbon inorganic gelling grouting filling material, and preparation method and application thereof - Google Patents

Low-carbon inorganic gelling grouting filling material, and preparation method and application thereof Download PDF

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Publication number
CN115196932B
CN115196932B CN202210853004.9A CN202210853004A CN115196932B CN 115196932 B CN115196932 B CN 115196932B CN 202210853004 A CN202210853004 A CN 202210853004A CN 115196932 B CN115196932 B CN 115196932B
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parts
low
filling material
grouting filling
agent
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CN115196932A (en
Inventor
刘人太
闫佳
徐树军
周昆
陈孟军
白继文
朱志敬
邵长志
徐意臻
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Shandong University
China Railway 14th Bureau Group Co Ltd
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Shandong University
China Railway 14th Bureau Group Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/08—Slag cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Abstract

The invention discloses a low-carbon inorganic gelling grouting filling material and a preparation method and application thereof, wherein the grouting filling material comprises the following components in parts by weight: 200-240 parts of fly ash, 160-200 parts of coal slag, 80-90 parts of slag, 70-90 parts of composite exciting agent and 20-25 parts of additive; the composite exciting agent comprises 30-60% of cement and alkaline substances, wherein the alkaline substances are selected from sodium hydroxide, calcium oxide or water glass; the admixture comprises the following components: 70-80 parts of bentonite, 7-10 parts of a water reducing agent, 8-15 parts of an anti-dispersing agent and 3-5 parts of an early strength agent.

Description

Low-carbon inorganic gelling grouting filling material, and preparation method and application thereof
Technical Field
The invention belongs to the technical field of cementing material preparation, and particularly relates to a low-carbon inorganic cementing grouting filling material as well as a preparation method and application thereof.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
In the construction process of tunnels and underground engineering, a plurality of complex and intractable geological disasters closely related to karst fractures and fault fracture zones exist. Particularly, in the water-rich karst area, sudden water burst disasters are easily caused during construction in rainy seasons, so that economic losses such as machine damage, project stagnation and the like are caused, and the ground is collapsed in severe cases, so that the life safety of constructors and pavement personnel is injured.
At present, the grouting method has the advantages of good treatment effect, high construction efficiency, low cost and the like, and becomes a common mode for treating karst fractures and fault fracture zones in underground engineering. The traditional common cement material has low groutability, overlong slurry setting time, low flowing water retention rate, large stone body shrinkage, poor slurry-rock cementing capability, low strength and poor durability, and can not meet the grouting treatment requirement of a water-rich sand layer. Although the cement-water glass type slurry can quickly block water gushing, the slurry has poor water corrosion resistance and durability, influences the overall quality of engineering, has high cost, needs to consume a large amount of cement and water glass, consumes non-renewable mineral resources and simultaneously discharges a large amount of carbon dioxide.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a low-carbon inorganic gelling grouting filling material and a preparation method and application thereof. The grouting material has the characteristics of good dispersibility resistance, high impermeability, good volume stability, low carbon, environmental protection, low cost and the like, effectively blocks underground water, reinforces a broken zone and is beneficial to realizing high-efficiency treatment of underground engineering disasters.
In order to realize the purpose, the invention is realized by the following technical scheme:
in a first aspect, the invention provides a low-carbon inorganic gelling, grouting and filling material which comprises the following components in parts by weight: 200-240 parts of fly ash, 160-200 parts of coal slag, 80-90 parts of slag, 70-90 parts of composite exciting agent and 20-25 parts of additive;
the composite exciting agent comprises 30-60% of cement and alkaline substances, wherein the alkaline substances are selected from sodium hydroxide, calcium oxide or water glass;
the admixture comprises the following components: 70-80 parts of bentonite, 7-10 parts of a water reducing agent, 8-15 parts of an anti-dispersing agent and 3-5 parts of an early strength agent.
In a second aspect, the invention provides a preparation method of the low-carbon inorganic gelling, grouting and filling material, which comprises the following steps:
grinding and sieving the coal cinder;
mixing the fly ash, the coal slag, the composite excitant and the additive according to the mass ratio, and uniformly stirring to obtain the composite material.
In a third aspect, the invention provides an application of the low-carbon inorganic gelling grouting filling material in grouting filling of a water-rich karst area.
The beneficial effects achieved by one or more of the embodiments of the invention described above are as follows:
the method adopts high-doping amount of low-calcium fly ash with poor activity and grinding slag to replace cement materials, takes alkaline inorganic salt and cement as a composite excitant in a synergistic way, takes a functional polymer as an additive and carries out organic-inorganic synergistic regulation and control on the materials. The prepared grouting material has the characteristics of good dispersibility resistance, high impermeability, good volume stability, low carbon, environmental protection, low cost and the like, is suitable for treating underground engineering disasters such as underground water plugging, broken rock mass reinforcement and the like, solves the problems of long setting time, poor water dispersibility resistance, poor impermeability, high cost, environmental pollution caused by solid waste accumulation and the like of the traditional grouting material, and has great application potential.
Because the mixing amount of the fly ash, the slag and other low-calcium solid wastes is larger in the grouting material, the utilization rate of the grouting material can be effectively improved, and the grouting material has a larger significance.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. 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 invention belongs.
In a first aspect, the invention provides a low-carbon inorganic gelling and grouting filling material, which comprises the following components in parts by weight: 200-240 parts of fly ash, 160-200 parts of coal slag, 80-90 parts of slag, 70-90 parts of composite exciting agent and 20-25 parts of additive;
the composite exciting agent comprises 30-60% of cement and alkaline substances, wherein the alkaline substances are selected from sodium hydroxide, calcium oxide or water glass;
the admixture comprises the following components: 70-80 parts of bentonite, 7-10 parts of a water reducing agent, 8-15 parts of an anti-dispersing agent and 3-5 parts of an early strength agent.
The fly ash is low-calcium ash obtained by burning anthracite or bituminous coal, the calcium content is less than or equal to 10 percent, the sieve residue of a 45-micron square-hole sieve is less than or equal to 20 percent, the water demand ratio is less than or equal to 115 percent, and the ignition loss is less than or equal to 8.0 percent.
The coal slag is waste slag generated by coal burning of a power plant boiler, and the loss on ignition is less than or equal to 15 percent and the calcium content is less than or equal to 10 percent after grinding and screening treatment.
The slag is S95 blast furnace slag.
The inorganic gelling grouting filling material takes gelling activity solid waste coal slag and low-calcium fly ash which are difficult to be utilized as main materials, takes alkali, water glass and cement as a composite activator in a synergistic manner, and is prepared with additives such as a water reducing agent, an anti-dispersing agent, a water-retaining agent and the like to realize the regulation and control of the working performance of the material.
The composite excitant comprises sodium hydroxide, quicklime or water glass and cement, wherein the sodium hydroxide, the quicklime and the water glass simultaneously provide an alkaline environment to promote the depolymerization of the glass bodies of the fly ash and the furnace slag, the quicklime can provide a calcium source, the water glass provides a silicon source to promote the formation of C-S-H gel, the low-dosage cement has the effect of the alkaline excitant and can provide certain early strength, and the problem of low early strength of the material caused by the existence of a glass body dissolving-reconstructing process is solved.
The glass body in the solid waste components such as coal slag, fly ash and the like is dissolved, gelatinized and polymerized and hardened under the action of the composite exciting agent.
In addition, the fly ash and the bentonite can improve the workability and the water retention of the material, and improve the impermeability and the durability of the material in the later stage of hydration.
In some embodiments, the composition of the compound activator is: 5-15 parts of sodium hydroxide, 30-50 parts of quicklime, 20-30 parts of water glass and 60-80 parts of cement.
Preferably, the cement is ordinary portland cement.
Preferably, the modulus of the water glass is 2.4, and the mass concentration is 40-45%.
The modulus of water glass refers to the ratio of the number of moles of silica to the number of moles of alkali metal oxide.
In some embodiments, the water reducer is a polycarboxylic acid high efficiency water reducer or a naphthalene based water reducer.
In some embodiments, the anti-dispersant is selected from cationic polyacrylamide, anionic polyacrylamide or non-ionic polyacrylamide, having a molecular weight of 500-1200 ten thousand. Because the anti-dispersing agent plays a role in anti-dispersing through the bridge action, the bridge bond action and the like between the anti-dispersing agent and cement particles, the structural molecular chain of the anti-dispersing agent must be matched with the active particles of the cement and the space between the active particles of the cement and the active particles, and the optimal adsorption, bridge and slurry wrapping effects can be achieved. The anti-dispersant has too low molecular weight to form an effective bridge action, too high molecular weight, too high slurry viscosity, increased water demand and unfavorable strength development.
Specific functional groups (such as carboxyl and amino) on the polymer chain of the dispersant inhibitor interact with O-, si-and the like on the surface of solid waste particles, so that the material has good water dispersion resistance.
In some embodiments, the bentonite is a technical grade sodium bentonite.
The raw material used in the invention is low-calcium solid waste which has low gelling activity and is difficult to be utilized, and the chemical composition is SiO 2 ，Al 2 O 3 Mainly, the composite exciting agent is used for realizing active excitation, and the synergistic regulation and control of the material condensation time, the fluidity, the bleeding rate, the strength and the volume stability are realized through the synergistic effect of the admixture, so that the green low-carbon inorganic cementing filling material meeting the engineering requirements is prepared, the performance requirements of the grouting engineering material are met, and the problem of environmental pollution caused by solid waste can be relieved.
In some embodiments, the early strength agent is selected from triethanolamine, sodium metaaluminate, aluminum sulfate.
In a second aspect, the invention provides a preparation method of the low-carbon inorganic gelling, grouting and filling material, which comprises the following steps:
grinding and sieving the coal cinder;
mixing the fly ash, the coal slag, the composite excitant and the additive according to the mass ratio, and uniformly stirring to obtain the composite material.
In a third aspect, the invention provides an application of the low-carbon inorganic gelling grouting filling material in grouting filling of a water-rich karst area.
The present invention is further illustrated by the following examples.
Example 1
A low-carbon inorganic gelling grouting filling material is prepared from the following raw materials in parts by mass: 200 parts of fly ash, 200 parts of coal slag, 90 parts of slag, 80 parts of composite exciting agent and 20 parts of additive.
The composite excitant comprises the following components: 10 parts of sodium hydroxide, 30 parts of water glass and 80 parts of ordinary portland cement.
The admixture comprises the following components: 75 parts of bentonite, 8 parts of a polycarboxylic acid water reducing agent, 10 parts of polyacrylamide and 5 parts of triethanolamine.
The preparation method comprises the following steps: the raw materials are mixed according to the proportion and stirred evenly. And mixing the solid waste raw material mixture, the exciting agent and water, and uniformly stirring to obtain the cement-water ratio of 0.65.
Example 2
A low-carbon inorganic gelling grouting filling material is prepared from the following raw materials in parts by mass: 240 parts of fly ash, 160 parts of coal slag, 80 parts of slag, 70 parts of exciting agent and 20 parts of additive.
The exciting agent comprises the following components: 40 parts of quicklime, 10 parts of sodium hydroxide and 80 parts of ordinary portland cement.
The admixture comprises the following components: 70 parts of bentonite, 10 parts of a naphthalene water reducing agent, 10 parts of polyacrylamide and 5 parts of aluminum sulfate.
The preparation method comprises the following steps: the raw materials are mixed and stirred evenly according to the weight portion. And mixing and uniformly stirring the solid waste raw material mixture, the exciting agent and water according to the mass fraction to obtain the low-carbon inorganic gelling grouting filling material, wherein the water-cement ratio is 0.65.
Example 3
A low-carbon inorganic gelling grouting filling material is prepared from the following raw materials in parts by mass: 200 parts of fly ash, 180 parts of coal slag, 90 parts of exciting agent and 25 parts of additive.
The exciting agent comprises 40 parts of quicklime, 20 parts of water glass and 60 parts of ordinary portland cement.
The admixture consists of 80 parts of bentonite, 7 parts of polycarboxylic acid water reducing agent, 10 parts of polyacrylamide and 3 parts of sodium metaaluminate.
The preparation method comprises the following steps: the raw materials are mixed and stirred evenly according to the parts by weight. And mixing the solid waste raw material mixture, the exciting agent and water according to mass fraction, and uniformly stirring to obtain the low-carbon inorganic gelling grouting filling material with the water-cement ratio of 0.65.
Example 4
The difference from example 3 is that: the exciting agent comprises 40 parts of quicklime, 20 parts of water glass, 5 parts of sodium hydroxide and 60 parts of ordinary portland cement.
Comparative example 1
The difference from example 3 is that: the exciting agent comprises 40 parts of quicklime and 20 parts of water glass, and common portland cement is omitted.
Comparative example 2
The difference from example 3 is that: the excitant is 60 parts of ordinary portland cement.
Comparative example 3
The difference from example 3 is that: the admixture consists of 7 parts of polycarboxylic acid water reducing agent, 10 parts of polyacrylamide and 3 parts of sodium metaaluminate; the bentonite was omitted.
Comparative example 4
The difference from example 3 is that: the fly ash is replaced by coal slag, and the total amount of the coal slag is 380 parts.
The materials of examples 1-4 and comparative examples 1-4, which were uniformly stirred, were cast in a mold for molding and subjected to standard curing at a temperature of 20 ℃ and a humidity of 95%.
Testing the fluidity and the bleeding rate of the freshly mixed slurry; the basic performances of the molded material test block of the standard curing 28d, such as flexural strength, compressive strength, impermeability and the like, are tested, and the results are shown in table 1.
TABLE 1 basic Performance index of low-carbon inorganic cementing and grouting filling material
Figure BDA0003755388200000081
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. A low-carbon inorganic gelling grouting filling material is characterized in that: the composition consists of the following components in parts by weight: 200-240 parts of fly ash, 160-200 parts of coal slag, 80-90 parts of slag, 70-90 parts of composite exciting agent and 20-25 parts of additive;
the composite exciting agent comprises 30-60% of cement and alkaline substances, wherein the alkaline substances are selected from sodium hydroxide, calcium oxide and water glass; the composite excitant comprises the following components: 5-15 parts of sodium hydroxide, 30-50 parts of quicklime, 20-30 parts of water glass and 60-80 parts of cement;
the admixture comprises the following components: 70-80 parts of bentonite, 7-10 parts of a water reducing agent, 8-15 parts of an anti-dispersing agent and 3-5 parts of an early strength agent; the anti-dispersing agent is selected from cationic polyacrylamide, anionic polyacrylamide or nonionic polyacrylamide, and the molecular weight is 500-1200 ten thousand.
2. The low-carbon inorganic gelling grouting filling material according to claim 1, characterized in that: the cement is ordinary portland cement.
3. The low-carbon inorganic gelling grouting filling material according to claim 1, characterized in that: the modulus of the water glass is 2.4, and the mass concentration is 40-45%.
4. The low-carbon inorganic gelling grouting filling material according to claim 1, characterized in that: the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent or a naphthalene water reducing agent.
5. The low-carbon inorganic gelling grouting filling material according to claim 1, characterized in that: the bentonite is industrial sodium bentonite.
6. The low-carbon inorganic gelling grouting filling material according to claim 1, characterized in that: the early strength agent is selected from triethanolamine, sodium metaaluminate and aluminum sulfate.
7. The method for preparing the low-carbon inorganic gelling, grouting and filling material as claimed in any one of claims 1 to 6, wherein the method comprises the following steps: the method comprises the following steps:
grinding and sieving the coal slag;
mixing the fly ash, the coal slag, the composite excitant and the additive according to the mass ratio, and uniformly stirring to obtain the composite material.
8. Use of the low carbon inorganic cementitious grouting filling material of claim 7 in grouting filling of water-rich karst areas.
CN202210853004.9A 2022-07-20 2022-07-20 Low-carbon inorganic gelling grouting filling material, and preparation method and application thereof Active CN115196932B (en)

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JP2791071B2 (en) * 1988-12-22 1998-08-27 電気化学工業株式会社 Injection material
CN105272091B (en) * 2015-09-25 2017-05-31 山东科技大学 Geopolymer combined casting material and its preparation and application
CN111689752B (en) * 2020-05-28 2021-06-01 山东大学 Multi-source solid waste base grouting cementing material and preparation method and application thereof
CN112759336A (en) * 2021-02-05 2021-05-07 山东大学 Performance optimizing agent, matrix material, solid waste grouting material, and preparation method and application thereof
CN113998945A (en) * 2021-10-26 2022-02-01 中交第三航务工程局有限公司南京分公司 Micro-expansion and strong anti-permeability cement-based grouting material and preparation method thereof
CN114230224B (en) * 2021-12-21 2023-08-25 青岛市地铁六号线有限公司 Low-carbon impervious full-solid waste grouting material and preparation method and application thereof

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