CN113636820B - Steel slag-based double-component high-strength grouting material - Google Patents
Steel slag-based double-component high-strength grouting material Download PDFInfo
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- CN113636820B CN113636820B CN202110993387.5A CN202110993387A CN113636820B CN 113636820 B CN113636820 B CN 113636820B CN 202110993387 A CN202110993387 A CN 202110993387A CN 113636820 B CN113636820 B CN 113636820B
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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
- C04B28/082—Steelmaking slags; Converter slags
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00008—Obtaining or using nanotechnology related materials
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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
- 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
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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
- 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
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
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- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the technical field of slurry, and discloses steel slag-based double-component high-strength grouting slurry which comprises a component A and a component B, wherein the weight ratio of the component A to the component B is 1:0.55-1:0.85, and the component A comprises the following components in parts by weight: 5 to 15 parts of ground steel slag, 5 to 15 parts of ground fly ash, 55 to 70 parts of continuous graded steel slag, 2 to 4 parts of special expanding agent, 0.2 to 0.5 part of polycarboxylate water reducer, 0.2 to 0.5 part of reinforcing agent, 2 to 4 parts of nano master batch and 2 to 4 parts of plasticizer. The free expansion rate of the steel slag-based double-component high-strength grouting material prepared by the invention is lower, and the stability problem of steel slag is completely solved; meanwhile, the defects of slow development of early strength of silicate grouting materials and reduced strength of compressive strength development and strength of fracture resistance of the later stage of the sulphoaluminate railway grouting materials are overcome; the application of the quasi-nano steel slag to replace cement not only can realize large-scale consumption of large solid wastes, but also saves cement with high carbon emission, and has great significance on carbon neutralization.
Description
Technical Field
The invention relates to the technical field of slurry, in particular to steel slag-based two-component high-strength grouting material.
Background
In China, the traditional grouting materials used for early-stage prestressed duct grouting are generally pure cement paste, and cement, water, a water reducing agent, an expanding agent and the like are adopted for on-site preparation during construction; the grouting material prepared in situ must satisfy the following conditions: the water-cement ratio is 0.40-0.45, and when a proper amount of water reducer is added, the water-cement ratio can be reduced to 0.35 at the minimum; the maximum bleeding rate of the pressed slurry is less than or equal to 3 percent, and the bleeding is absorbed by the mortar again within 24 hours; the viscosity of the slurry is controlled to be 14-18 s; the slurry is pressed to have a certain expansion effect before solidification; the compressive strength of the slurry pressing test block is not lower than 50MPa.
At present, cement, various additives and water are adopted to prepare grouting materials on site, and the problems of poor compatibility of the various additives, poor adaptability of the cement and the water reducing agent and the like generally exist, so that the following serious problems exist in the grouting of a pore canal: (1) Poor slurry quality stability, poor fluidity, fast flow loss and poor volume stability; (2) The newly mixed slurry has large bleeding, easy segregation and layering, more micro foam in the slurry, poor fluidity, unfavorable setting time, unsmooth slurry grouting, easy pipe blockage, low construction speed, difficult pore canal plumping and the like; (3) After hardening, the slurry is not compact, bubbles and needle gaps are more, the bonding with the prestressed tendons is not solid, even broken lines exist in the slurry, the pore channels are not full, the slurry is powdered outside high points, and the like; these problems not only affect construction, but also are directly related to durability and safe use of the bridge structure.
The existing railway support mortar has the defects of sinking, cracking, strength development and weakness in later period, collapse of bending strength, short storage time and the like.
Disclosure of Invention
The invention aims to provide steel slag-based double-component high-strength grouting material so as to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the steel slag-based double-component high-strength grouting material comprises a component A and a component B, wherein the weight ratio of the component A to the component B is 1:0.55-1:0.85, and the component A comprises the following components in parts by weight: 5 to 15 parts of ground steel slag, 5 to 15 parts of ground fly ash, 55 to 70 parts of continuous graded steel slag, 2 to 4 parts of special expanding agent, 0.2 to 0.5 part of polycarboxylate water reducer, 0.2 to 0.5 part of reinforcing agent, 2 to 4 parts of nano master batch and 2 to 4 parts of plasticizer.
As still further aspects of the invention: the component B comprises the following components in parts by weight: 40 to 60 parts of nano inorganic resin, 20 to 30 parts of nano modifier, 5 to 15 parts of water-soluble rare earth, 0.1 to 0.5 part of defoamer and 1 to 5 parts of thickener.
As still further aspects of the invention: the specific surface area of the ground steel slag is 1000-1500 m 2 /kg; the specific surface area of the ground fly ash is 1000-1500 m 2 Per kg, and the type of fine coal ash is selected from class F, wherein the CaO content is less than 10%.
As still further aspects of the invention: the aggregate fineness of the continuous graded steel slag in the component A is 0.1-1 mm, the special expanding agent in the component A is formed by compounding one or more of a plastic expanding agent, a calcium oxide expanding agent or a calcium sulfoaluminate-calcium oxide expanding agent, the reinforcing agent in the component A is anhydrous calcium sulfate, and the plasticizer in the component A is silicon steel.
As still further aspects of the invention: the saidThe nanometer master batch in the component A has the specific surface area more than or equal to 6 multiplied by 10 4 m 2 The modified inorganic activator is prepared by mixing nano-scale aluminum oxide and silicon oxide according to the weight ratio of 1:0.2-1:0.5.
As still further aspects of the invention: the nanometer inorganic resin in the component B is prepared by fusing inorganic silicon and organic silicon at high temperature and carrying out hybridization grafting.
As still further aspects of the invention: the nanometer modifier in the component B is aluminosilicate which is ground into 100 nanometers, the water-soluble rare earth in the component B is various lanthanide rare earth salts, the defoamer in the component B is water-soluble silane defoamer, and various water-soluble celluloses of the thickener in the component B are hybridized.
As still further aspects of the invention: the preparation method comprises the following steps: adding the component B into the component A according to the weight ratio of 0.55:1-0.85:1, then putting the components into a stirrer together, and dispersing for two minutes at the rotating speed of 1000 r/min.
Compared with the prior art, the invention has the beneficial effects that:
the compressive strength of the steel slag-based two-component high-strength grouting material prepared by the invention exceeds 20 megapascals in 2 hours, the compressive strength of 28d exceeds 70 megapascals, the later strength is continuously increased by more than 80 megapascals, the nano material locks active substances in the steel slag, the free expansion rate measured by a mortar rod method is lower, and the stability problem of the steel slag is completely solved; meanwhile, the defects of slow development of early strength of silicate grouting materials and reduced strength of compressive strength development and strength of fracture resistance of the later stage of the sulphoaluminate railway grouting materials are overcome; the application of the quasi-nano steel slag to replace cement not only can realize large-scale consumption of large solid wastes, but also saves cement with high carbon emission, and has great significance on carbon neutralization.
Detailed Description
In the embodiment of the invention, the steel slag-based double-component high-strength grouting material comprises a component A and a component B, wherein the weight ratio of the component A to the component B is 1:0.55-1:0.85, and the component A comprises the following components in parts by weight: 5 to 15 parts of ground steel slag, 5 to 15 parts of ground fly ash, 55 to 70 parts of continuous graded steel slag, 2 to 4 parts of special expanding agent, 0.2 to 0.5 part of polycarboxylate water reducer, 0.2 to 0.5 part of reinforcing agent, 2 to 4 parts of nano master batch and 2 to 4 parts of plasticizer.
Preferably, the component B comprises the following components in parts by weight: 40 to 60 parts of nano inorganic resin, 20 to 30 parts of nano modifier, 5 to 15 parts of water-soluble rare earth, 0.1 to 0.5 part of defoamer and 1 to 5 parts of thickener.
Preferably, the specific surface area of the ground steel slag is 1000-1500 m 2 /kg; the specific surface area of the ground fly ash is 1000-1500 m 2 And/kg, wherein the type of the fine powder coal ash is F type, the CaO content is less than 10 percent, and the fineness of the ground steel slag and the ground coal ash is in a quasi-nanometer level.
Preferably, the aggregate fineness of the continuous graded steel slag in the component A is 0.1-1 mm, the special expanding agent in the component A is formed by compounding one or more of a plastic expanding agent, a calcium oxide expanding agent or a calcium sulfoaluminate-calcium oxide expanding agent, the reinforcing agent in the component A is anhydrous calcium sulfate, and the plasticizer in the component A is silicon steel.
Preferably, the nanometer master batch in the component A has the specific surface area of more than or equal to 6 multiplied by 10 4 m 2 The modified inorganic activator is prepared by mixing nano-scale aluminum oxide and silicon oxide according to the weight ratio of 1:0.2-1:0.5.
Preferably, the nanometer inorganic resin in the component B is prepared by fusing inorganic silicon and organic silicon at high temperature and carrying out hybridization grafting.
Preferably, the nano modifier in the component B is aluminosilicate which is ground to 100 nanometers, the water-soluble rare earth in the component B is various lanthanide rare earth salts, the defoamer in the component B is water-soluble silane defoamer, and various water-soluble celluloses of the thickener in the component B are hybridized.
Preferably, the preparation method comprises the following steps: adding the component B into the component A according to the weight ratio of 0.55:1-0.85:1, then putting the components into a stirrer together, and dispersing for two minutes at the rotating speed of 1000 r/min.
In order to better illustrate the technical effects of the invention, the experiments of the first embodiment and the second embodiment are used for illustration, and the comparison analysis of the detection results of the first embodiment and the second embodiment and the industry quality index is used for obtaining a conclusion:
embodiment one: preparation of grouting material C70 for railway
The weight ratio of the component A to the component B is 1:0.7;
wherein the component A comprises the following components in parts by weight: 12 parts of ground steel slag, 13 parts of ground coal ash, 65 parts of continuous graded steel slag, 3 parts of calcium sulfoaluminate, 0.5 part of polycarboxylate water reducer, 0.5 part of anhydrous calcium sulfate, 2 parts of nano master batch and 4 parts of silicon steel, wherein the specific surface areas of the ground steel slag and the ground coal ash are 1000m 2 /kg。
The component B comprises the following components in parts by weight: 60 parts of nano inorganic resin, 27 parts of nano modifier, 10 parts of water-soluble rare earth lanthanum salt, 0.5 part of silane defoamer and 2.5 parts of hydroxypropyl methyl cellulose-hybrid carboxyethyl methyl cellulose.
The grouting material C70 of example one was tested for fluidity, bleeding property, compressive strength, flexural strength, elastic modulus and free expansion ratio, wherein the free expansion ratio was measured by a mortar bar method, and the results thereof are shown in table 1 below;
table 1: various performance indexes of grouting material C70
| Detecting items | Unit (B) | Industry quality standard | Detection result |
| Initial fluidity | mm | ≥320 | 335 |
| Fluidity for 30min | mm | ≥240 | 318 |
| Bleeding property | ％ | No bleeding | 0 |
| Compressive strength for 2h | Mpa | ≥20 | 24.8 |
| 28d compressive Strength | Mpa | ≥50 | 73.5 |
| 56d compressive Strength | Mpa | Compressive strength of not less than 28d | 76.7 |
| 90d compressive Strength | Mpa | Compressive strength of not less than 56d | 80.1 |
| 24h flexural Strength | Mpa | ≥10 | 12.2 |
| Modulus of elasticity of 28d | Gpa | ≥30 | 31 |
| 28d free expansion ratio | ％ | 0.02～0.1 | 0.05 |
Embodiment two: grouting material C85 for reinforcing steel bar sleeve
The weight ratio of the component A to the component B is 1:0.65;
wherein the component A comprises the following components in parts by weight: 15 parts of ground steel slag, 15 parts of ground fly ash, 61 parts of continuous graded steel slag, 2 parts of calcium sulfoaluminate, 0.5 part of polycarboxylate water reducer, 0.5 part of anhydrous calcium sulfate, 3 parts of nano master batch and 3 parts of silicon steel, wherein the specific surface areas of the ground steel slag and the ground fly ash are 1500m 2 /kg。
The component B comprises the following components in parts by weight: 60 parts of nano inorganic resin, 25 parts of nano modifier, 12 parts of water-soluble rare earth lanthanum salt, 0.5 part of silane defoamer and 2.5 parts of hydroxypropyl methyl cellulose-hybrid carboxyethyl methyl cellulose.
The grouting material C85 of the second example was tested for fluidity, bleeding property, compressive strength, flexural strength, elastic modulus and free expansion rate, and the results are shown in Table 2 below;
table 2: various performance indexes of grouting material C85
| Detecting items | Unit (B) | Industry quality standard | Detection result |
| Initial fluidity | mm | ≥320 | 342 |
| Fluidity for 30min | mm | ≥240 | 332 |
| Bleeding property | ％ | No bleeding | 0 |
| Compressive strength for 2h | Mpa | ≥20 | 26.1 |
| 28d compressive Strength | Mpa | ≥50 | 75.2 |
| 56d compressive Strength | Mpa | Compressive strength of not less than 28d | 77.1 |
| 90d compressive Strength | Mpa | Compressive strength of not less than 56d | 82.2 |
| 24h flexural Strength | Mpa | ≥10 | 13.1 |
| Modulus of elasticity of 28d | Gpa | ≥30 | 33 |
| 28d free expansion ratio | ％ | 0.02～0.1 | 0.08 |
From tables 1 and 2, it can be derived that: the product of the invention accords with the industry quality standard, the steel slag and the fly ash are ground to the quasi-nanometer level, the activity is excited to the greatest extent, the quasi-nanometer level steel slag and the fly ash are modified by nanometer master batch and nanometer gel, so that the product has resin colloid, and active substances of superfine steel slag and continuous-grade steel slag aggregate are locked, so that the free expansion rate of a mortar rod method is lower, the problem of stability of the steel slag is thoroughly solved, and finally the high-strength grouting material with high fluidity is prepared.
The foregoing description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical solution of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (4)
1. The steel slag-based double-component high-strength grouting material comprises a component A and a component B, wherein the weight ratio of the component A to the component B is 1:0.55-1:0.85, and the steel slag-based double-component high-strength grouting material is characterized in that the component A comprises the following components in parts by weight: 5-15 parts of ground steel slag, 5-15 parts of ground fly ash, 55-70 parts of continuous graded steel slag, 2-4 parts of special expanding agent, 0.2-0.5 part of polycarboxylate water reducer, 0.2-0.5 part of reinforcing agent, 2-4 parts of nano master batch and 2-4 parts of plasticizer, wherein the component B comprises the following components in parts by weight: 40 to 60 parts of nano inorganic resin, 20 to 30 parts of nano modifier, 5 to 15 parts of water-soluble rare earth, 0.1 to 0.5 part of defoamer and 1 to 5 parts of thickener, wherein the nano master batch in the component A has the specific surface area of more than or equal to 6 multiplied by 10 4 m 2 The modified inorganic activator is prepared by mixing nano-scale aluminum oxide and silicon oxide according to the weight ratio of 1:0.2-1:0.5;
the specific surface area of the ground steel slag is 1000-1500 m 2 /kg; the specific surface area of the ground fly ash is 1000-1500 m 2 Per kg, and the type of fine coal ash is selected from class F, wherein the CaO content is<10％；
The aggregate fineness of the continuous graded steel slag in the component A is 0.1-lmm;
the nanometer inorganic resin in the component B is prepared by fusing inorganic silicon and organic silicon at high temperature and carrying out hybridization grafting.
2. The steel slag based two-component high-strength grouting material according to claim 1, wherein the special expansion agent in the A component is formed by compounding one or more of a plastic expansion agent, a calcium oxide expansion agent or a calcium sulfoaluminate-calcium oxide expansion agent, the reinforcing agent in the A component is anhydrous calcium sulfate, and the plasticizer in the A component is silicon steel.
3. The steel slag based two-component high-strength grouting material according to claim 1, wherein the nano modifier in the B component is aluminosilicate which is ground to 100 nanometers, the water-soluble rare earth in the B component is a plurality of lanthanide rare earth salts, the defoaming agent in the B component is a water-soluble silane defoaming agent, and a plurality of water-soluble celluloses of the thickening agent in the B component are hybridized.
4. The steel slag based two-component high-strength grouting material according to claim 1, which is characterized in that the preparation method comprises the following steps:
adding the component B into the component A according to the weight ratio of 0.55:1-0.85:1, then putting the components into a stirrer together, and dispersing for two minutes at the rotating speed of 1000 r/min.
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| CN113955976A (en) * | 2021-12-02 | 2022-01-21 | 华筑绿建(北京)科技有限公司 | Nano inorganic gel modifier and preparation method thereof |
| CN113998937A (en) * | 2021-12-11 | 2022-02-01 | 华筑绿建(北京)科技有限公司 | Cement-free solid waste base concrete formula for PHC pipe pile and preparation method thereof |
| CN117229034B (en) * | 2023-11-13 | 2024-01-23 | 天津包钢稀土研究院有限责任公司 | Rare earth carbonate modified fly ash low-heat-conductivity grouting material and preparation method and application thereof |
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| CN107814542A (en) * | 2017-11-22 | 2018-03-20 | 广西云燕特种水泥建材有限公司 | A kind of railway grouting material and its production method |
| CN108046682A (en) * | 2017-12-08 | 2018-05-18 | 浙江共创建材科技有限公司 | A kind of sleeve grouting material |
| CN112142380A (en) * | 2020-09-16 | 2020-12-29 | 贵州正和天筑科技有限公司 | High-strength grouting material for tank body and preparation method thereof |
| CN113185247A (en) * | 2021-04-26 | 2021-07-30 | 湖南三泓建材有限公司 | Steel slag composite grouting material and preparation method thereof |
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