CN116143544B - Tailing aggregate foam concrete and preparation method thereof - Google Patents
Tailing aggregate foam concrete and preparation method thereof Download PDFInfo
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- CN116143544B CN116143544B CN202111384073.1A CN202111384073A CN116143544B CN 116143544 B CN116143544 B CN 116143544B CN 202111384073 A CN202111384073 A CN 202111384073A CN 116143544 B CN116143544 B CN 116143544B
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- 239000011381 foam concrete Substances 0.000 title claims abstract description 43
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000003054 catalyst Substances 0.000 claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 238000002156 mixing Methods 0.000 claims abstract description 24
- 239000004568 cement Substances 0.000 claims abstract description 23
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 18
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000004576 sand Substances 0.000 claims abstract description 15
- 239000004567 concrete Substances 0.000 claims abstract description 12
- 229910021487 silica fume Inorganic materials 0.000 claims abstract description 11
- 239000002002 slurry Substances 0.000 claims abstract description 11
- RAXSQXIANLNZAF-UHFFFAOYSA-N boron;hydrazine Chemical compound [B].NN RAXSQXIANLNZAF-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000003756 stirring Methods 0.000 claims abstract description 10
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000010931 gold Substances 0.000 claims abstract description 7
- 229910052737 gold Inorganic materials 0.000 claims abstract description 7
- 238000005187 foaming Methods 0.000 claims abstract description 4
- 238000000465 moulding Methods 0.000 claims abstract description 4
- 229910000863 Ferronickel Inorganic materials 0.000 claims abstract description 3
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 3
- 239000000956 alloy Substances 0.000 claims abstract description 3
- 230000029226 lipidation Effects 0.000 claims abstract description 3
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 claims description 13
- 238000000498 ball milling Methods 0.000 claims description 10
- RYYKJJJTJZKILX-UHFFFAOYSA-M sodium octadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCC([O-])=O RYYKJJJTJZKILX-UHFFFAOYSA-M 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- 239000003469 silicate cement Substances 0.000 claims description 2
- 239000008399 tap water Substances 0.000 claims description 2
- 235000020679 tap water Nutrition 0.000 claims description 2
- 150000001768 cations Chemical group 0.000 claims 1
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000009849 deactivation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- RBTBFTRPCNLSDE-UHFFFAOYSA-N 3,7-bis(dimethylamino)phenothiazin-5-ium Chemical compound C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 RBTBFTRPCNLSDE-UHFFFAOYSA-N 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000007210 heterogeneous catalysis Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229960000907 methylthioninium chloride Drugs 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Classifications
-
- 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
- C04B28/04—Portland 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
- C04B2111/40—Porous or lightweight 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- 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 tailing aggregate foam concrete and a preparation method thereof. The tailing aggregate foam concrete is prepared from cement, tailing sand, a water reducing agent, water, a supported catalyst, a density regulator and a deactivator. Wherein the supported catalyst is made of ferronickel alloy catalyst powder coated by silica fume supported lipidation. The density regulator adopts hydrazine borane. The deactivating agent adopts a color fixing agent NFC. In the preparation of the tailing aggregate foam concrete, cement, gold tailing sand and a supported catalyst are stirred and mixed uniformly in a stirrer to obtain a dry material A; mixing a water reducing agent, a density regulator and 80% water to obtain a solution B; mixing a color fixing agent and the rest 20% water to obtain a solution C; then stirring and mixing the dry material A and the solution B, adding the solution C, and stirring and mixing uniformly to obtain concrete slurry; and finally, pouring the mixed concrete slurry into a mould for molding, standing for foaming, and curing to obtain a foam concrete finished product. The tailing foam concrete has the characteristics of light weight and high strength.
Description
Technical Field
The invention relates to a novel building material, in particular to tailing aggregate foam concrete and a preparation method thereof, and belongs to the technical field of civil engineering materials.
Background
Foam concrete is a light building heat-insulating material and has been widely used in civil engineering and construction engineering in China. The strength of the foam concrete material in China is generally low, and the engineering application of the foam concrete material is affected. In the aspect of improving the strength of foam concrete, the addition of mineral aggregate is one of measures besides the adoption of high-grade cement at present. Particularly, the mine tailings are used for replacing natural sand as aggregate, so that the strength of concrete can be improved, the material cost can be reduced, and the environmental pollution, land occupation and potential safety hazard caused by solid waste resources such as tailings can be eliminated. However, the strength and density of foam concrete are a pair of contradictions. Generally, the density is high, the density is low, and the strength is low. And the density and the heat insulation performance of the material are in negative correlation. The heat preservation and insulation performance with high density is poor, and the heat preservation and insulation performance with low density is good. Ideally, the material is both lightweight and high strength. Therefore, when tailings are added as aggregates of foam concrete, the strength of the concrete is improved, but the density of the concrete is increased, and the heat insulation performance is reduced. Therefore, how to maintain the low density and excellent heat preservation and insulation performance of the material on the basis of adding tailing aggregates to improve the strength of foam concrete is a problem which needs to be solved.
Disclosure of Invention
Aiming at the contradiction between the light weight and the high strength of the existing foam concrete, the invention aims to provide the foam concrete material taking the tailings as the aggregate and the preparation method thereof, wherein the foam concrete has lower density, higher strength and good application prospect.
In order to achieve the above object, the present invention adopts the following technical scheme:
The main raw materials of the foam concrete are cement, tailing sand, a water reducing agent, water, a supported catalyst, a density regulator and a deactivator. The cement is ordinary silicate cement; the tailing sand adopts gold tailing sand with fineness modulus of 0.3-0.6, and the dosage is 0-1.0 times of the cement mass; the water reducer is a polycarboxylic acid high-efficiency water reducer, and the dosage is 0.025 times of the cement. The water is tap water, and the dosage is 0.25-0.35 times of the cement.
The supported catalyst is prepared from ferronickel alloy catalyst powder coated by silica fume supported lipidation. The preparation process comprises the following steps: mixing 1.0 part by weight of 300-mesh iron-nickel alloy catalyst powder FeNi60 with 1.0 part by weight of sodium stearate, putting into a planetary high-energy ball mill, ball milling for 5 minutes, coating the surface of the iron-nickel alloy catalyst powder, adding 200 parts of silica fume into the high-energy ball mill, and continuing ball milling for 10 minutes to obtain the supported catalyst. The dosage of the supported catalyst is 0.05-0.10 times of the cement.
The density regulator adopts hydrazine borane, the dosage of which is 0.02-0.30% of the cement amount, and is used for controlling the density of the foam concrete to be changed within the range of 300-1600 kg/M3. The foam concrete has small density when the consumption is large; the foam concrete has high density when the dosage is small.
The deactivating agent adopts color fixing agent NFC, and the dosage of the deactivating agent is 0.01-0.02 times of the cement.
The invention also provides a preparation method of the tailing aggregate foam concrete, which comprises the following steps:
Step 1: mixing 1.0 part by weight of 300-mesh iron-nickel alloy catalyst powder FeNi60 with 1.0 part by weight of sodium stearate, putting into a planetary high-energy ball mill, ball milling for 5 minutes, coating the surface of the iron-nickel alloy catalyst powder, adding 200 parts of silica fume into the high-energy ball mill, and continuing ball milling for 10 minutes to obtain the supported catalyst.
Step 2: stirring and uniformly mixing cement, gold tailing sand and a supported catalyst in a stirrer to obtain a dry material A; meanwhile, mixing a water reducing agent, a density regulator and 80% of water to obtain a solution B; mixing a color fixing agent and the rest 20% water to obtain a solution C;
Step 3: stirring and mixing the dry material A and the solution B, adding the solution C, and stirring and mixing uniformly to obtain concrete slurry; and pouring the mixed concrete slurry into a mould for molding, standing for foaming, and curing to obtain a foam concrete finished product.
The invention has the advantages that:
1. the supported catalyst disclosed by the invention is subjected to surface coating treatment on the iron-nickel alloy catalyst powder and ball-milled together with the silica fume, so that the problems that the iron-nickel alloy catalyst powder is easy to oxidize and agglomerate and difficult to uniformly disperse in a system are solved, meanwhile, as a component of foam concrete, the viscosity of the concrete slurry can be increased, the bubble coating capability and stability of the slurry are enhanced, and the supported catalyst has the heterogeneous catalysis effect on hydration of a density regulator so as to regulate the density of the foam concrete.
2. The hydrazine borane is used as the density regulator of the foam concrete, so that the system can generate a large amount of gas with a small amount of gas generating agent. By a method of dissolving hydrazine borane in a water reducing agent solution in advance, the hydrazine borane can be uniformly dispersed in the system. When the catalyst in the dry material A in the system encounters hydrazine borane in the solution B, the hydrazine borane is catalyzed to generate hydration reaction uniformly in the system, a large amount of gas is generated rapidly, the uniform structure and the density reduction of the foam concrete are realized, and the density of the foam concrete can be regulated by the amount of the hydrazine borane.
3. The deactivation agent, namely the color fixing agent NFC, can not only remove the surface activity of the water reducing agent, but also promote the solidification of slurry, and increase the early strength and structural stability of the foam concrete. Through dissolving the color fixing agent NFC in water in advance, the color fixing agent NFC can be guaranteed to be uniformly distributed in a system in a subsequent foam concrete raw material mixing process and react with a water reducing agent, uniform increase of strength of each part in the foam concrete is facilitated, nonuniform plastic shrinkage cracking of the foam concrete is restrained, and the foam concrete is guaranteed to achieve light weight and high strength.
Examples
The present invention will be specifically described with reference to the following specific examples.
1. Raw materials
(1) Cement and its preparation method
Cement meeting the current national or industry standard specifications is selected, for example: 42.5 Portland cement.
(2) Tailing sand
Gold ore tailing sand is selected, the fineness modulus is 0.3-0.6, the apparent relative density is more than 2.5, the MB value of the methylene blue test is less than 1.4, the content and firmness of harmful substances and the alkali aggregate reaction index all meet the requirements of GB/T14684-2011 standard.
(3) Water reducing agent
And selecting a high-efficiency water reducer meeting the current national or industry standard, and preferably selecting a polycarboxylic acid water reducer (PCE).
(4) Water and its preparation method
Water meeting the current national or industry standard is selected.
(5) Silica fume
Silica fume meeting the quality requirements of the existing national or industry standards on the mineral additives is selected.
(6) Catalyst
The iron-nickel alloy catalyst powder with 300 meshes of fineness and the mark of FeNi60 is selected as a catalyst.
(7) Sodium octadecanoate
Chemically pure sodium stearate is used as a coating agent of the iron-nickel alloy catalyst powder to prevent oxidation of the iron-nickel alloy catalyst powder.
(8) Density regulator
Chemical pure hydrazine borane is selected.
(9) Deactivators
And a cationic color fixing agent NFC is selected as a deactivation agent of the water reducing agent, and is a chemical product.
2. Formula and preparation process
(1) And (2) supporting a catalyst:
Mixing 1.0 part by weight of 300-mesh iron-nickel alloy catalyst powder FeNi60 with 1.0 part by weight of sodium stearate, putting into a planetary high-energy ball mill, ball-milling for 5 minutes, coating the surface of the iron-nickel alloy catalyst powder, adding 200 parts of silica fume into the high-energy ball mill, and continuing ball milling for 10 minutes to obtain a supported catalyst;
(2) Dry material A preparation:
Cement, gold tailing sand and supported catalyst are stirred and mixed uniformly in a stirrer according to the mass ratio of 1:0-1.0:0.05-0.10, so as to obtain a dry material A;
(3) Preparing a solution B:
respectively weighing and mixing a density regulator accounting for 0.02-0.30% of the mass of cement, a water reducing agent accounting for 0.025 times of the mass of cement and water accounting for 0.2-0.28 times of the mass of cement to obtain a solution B;
(4) Preparing a solution C:
Respectively weighing 0.01-0.02 times of color fixing agent NFC and 0.05-0.07 times of water by mass of cement, and uniformly mixing to obtain solution C;
(5) Preparation of foam concrete
Stirring and mixing the prepared dry material A and the solution B, adding the solution C, and stirring and mixing uniformly to obtain concrete slurry; and pouring the mixed concrete slurry into a mould for molding, standing for foaming, and curing to obtain a foam concrete finished product.
3. Performance test results
The dry density and 28d compressive strength of the foam concrete hardened body were tested according to the method of JG T266-2011 to obtain the proportions and corresponding performance test results of the foam concrete of each example, as shown in the following table:
as can be seen from the table, the foam concrete of the present invention has higher strength at the same density as the prescribed value of JG T266-2011 standard. The foam concrete provided by the invention has the characteristics of low density, light weight and high strength under the condition of the same strength.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
Claims (1)
1. The tailing aggregate foam concrete is characterized by comprising the following raw materials of cement, tailing sand, a water reducing agent, water, a supported catalyst, a density regulator and a deactivator in proportion: cement, tailing sand, water reducing agent, water, supported catalyst, density regulator and deactivator=1:0-1.0:0.025:0.25-0.35:0.05-0.10:0.0002-0.003:0.01-0.02; the cement is ordinary silicate cement, the tailing sand adopts gold tailing sand with fineness modulus of 0.3-0.6, the water reducer is a polycarboxylic acid high-efficiency water reducer, the water is tap water, the density regulator is hydrazine borane, and the deactivator is a cation color fixing agent NFC; the supported catalyst is prepared from ferronickel alloy catalyst powder coated by silica fume supported lipidation, and the preparation process comprises the following steps: mixing 1.0 part by weight of 300-mesh iron-nickel alloy catalyst powder FeNi60 with 1.0 part by weight of sodium stearate, putting into a planetary high-energy ball mill for ball milling for 5 minutes, adding 200 parts of silica fume into the high-energy ball mill, and continuing ball milling for 10 minutes to obtain a supported catalyst; the preparation method of the tailing aggregate foam concrete is characterized by comprising the following steps of:
Step 1: mixing 1.0 part by weight of 300-mesh iron-nickel alloy catalyst powder FeNi60 with 1.0 part by weight of sodium stearate, putting into a planetary high-energy ball mill for ball milling for 5 minutes, adding 200 parts of silica fume into the high-energy ball mill, and continuing ball milling for 10 minutes to obtain a supported catalyst;
Step 2: stirring and uniformly mixing cement, gold tailing sand and a supported catalyst in a stirrer to obtain a dry material A; meanwhile, mixing a water reducing agent, a density regulator and 80% of water to obtain a solution B; mixing a color fixing agent and the rest 20% water to obtain a solution C;
Step3: firstly, uniformly stirring and mixing the dry material A and the solution B, then adding the solution C, and uniformly stirring and mixing to obtain concrete slurry; and pouring the mixed concrete slurry into a mould for molding, standing for foaming, and curing to obtain a foam concrete finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111384073.1A CN116143544B (en) | 2021-11-22 | 2021-11-22 | Tailing aggregate foam concrete and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111384073.1A CN116143544B (en) | 2021-11-22 | 2021-11-22 | Tailing aggregate foam concrete and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116143544A CN116143544A (en) | 2023-05-23 |
| CN116143544B true CN116143544B (en) | 2024-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111384073.1A Active CN116143544B (en) | 2021-11-22 | 2021-11-22 | Tailing aggregate foam concrete and preparation method thereof |
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