CN115849808B - Environment-friendly aerated concrete block and preparation method thereof - Google Patents
Environment-friendly aerated concrete block and preparation method thereof Download PDFInfo
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- CN115849808B CN115849808B CN202211499732.0A CN202211499732A CN115849808B CN 115849808 B CN115849808 B CN 115849808B CN 202211499732 A CN202211499732 A CN 202211499732A CN 115849808 B CN115849808 B CN 115849808B
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- 239000004567 concrete Substances 0.000 title claims abstract description 75
- 238000002360 preparation method Methods 0.000 title abstract description 26
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 64
- 150000002505 iron Chemical class 0.000 claims abstract description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 229910052742 iron Inorganic materials 0.000 claims abstract description 32
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 25
- 239000003381 stabilizer Substances 0.000 claims abstract description 19
- 239000006260 foam Substances 0.000 claims abstract description 18
- 239000004088 foaming agent Substances 0.000 claims abstract description 16
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 16
- 239000010440 gypsum Substances 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 16
- 239000000843 powder Substances 0.000 claims abstract description 15
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 14
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 14
- 239000004568 cement Substances 0.000 claims abstract description 14
- 239000004927 clay Substances 0.000 claims abstract description 14
- 239000010881 fly ash Substances 0.000 claims abstract description 14
- 239000004571 lime Substances 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 13
- 238000001354 calcination Methods 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 6
- 238000000227 grinding Methods 0.000 claims abstract description 6
- 239000004575 stone Substances 0.000 claims abstract description 6
- 238000001238 wet grinding Methods 0.000 claims abstract description 6
- 239000012752 auxiliary agent Substances 0.000 claims description 23
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 21
- 229910052698 phosphorus Inorganic materials 0.000 claims description 21
- 239000011574 phosphorus Substances 0.000 claims description 21
- 239000002002 slurry Substances 0.000 claims description 13
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- -1 cobble Substances 0.000 claims description 4
- 229920005646 polycarboxylate Polymers 0.000 claims description 4
- 241000931143 Gleditsia sinensis Species 0.000 claims description 3
- DCNHVBSAFCNMBK-UHFFFAOYSA-N naphthalene-1-sulfonic acid;hydrate Chemical compound O.C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 DCNHVBSAFCNMBK-UHFFFAOYSA-N 0.000 claims description 3
- 239000012188 paraffin wax Substances 0.000 claims description 3
- 229920002401 polyacrylamide Polymers 0.000 claims description 3
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 claims description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 2
- 239000007844 bleaching agent Substances 0.000 claims description 2
- 229920005610 lignin Polymers 0.000 claims description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 10
- 238000012360 testing method Methods 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 7
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- 238000013329 compounding Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000004566 building material Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000543 intermediate Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The application relates to the field of aerated concrete blocks, and particularly discloses an environment-friendly aerated concrete block and a preparation method thereof. The environment-friendly aerated concrete block is prepared from the following raw materials in parts by weight: 80-100 parts of cement; 20-40 parts of lime powder; 50-80 parts of fly ash; 80-100 parts of stones; 50-80 parts of modified iron tailings; 350-500 parts of water; 10-20 parts of foaming agent; 2-6 parts of foam stabilizer; 5-12 parts of water reducer; the modified iron tailings are prepared by the following steps: s1, taking iron tailings, clay and gypsum according to the weight ratio of (10-15) (4-7) (1), uniformly mixing, adding water, wet-grinding for 2-3h, and then drying to obtain a pretreatment material; s2, calcining the pretreated material in the step S1 at 100-300 ℃, 500-700 ℃ and 800-900 ℃ for 2-3 hours respectively, cooling and grinding to obtain the modified iron tailings. The environment-friendly aerated concrete block can overcome the defects brought by iron tailing application and has excellent and stable structural strength.
Description
Technical Field
The application relates to the field of aerated concrete blocks, in particular to an environment-friendly aerated concrete block and a preparation method thereof.
Background
The aerated concrete block is a novel building material which is light and porous, has heat preservation and insulation, good fireproof performance, can be nailed, sawed, planed and has a certain shock resistance. The porous concrete product is produced with flyash, lime, cement, gypsum, slag, etc as main material, proper amount of air generating agent, regulator, bubble stabilizer, etc. and through compounding, stirring, casting, stopping, cutting, high pressure steaming and other technological steps.
The Chinese patent application document with publication number of CN104291748A discloses a preparation method of an aerated concrete block, which comprises the following steps: mixing iron tailings, quartz tailings and water to obtain slurry A1; mixing the slurry A1, cement, lime, aluminum powder and a foam stabilizer to obtain slurry A2; pouring the slurry A2 into a mould and then carrying out primary maintenance; demoulding and cutting after the primary curing is finished to obtain a building block blank; steam curing is carried out on the block blank to obtain an aerated concrete block; the iron tailing comprises, by weight, 50-200 parts of quartz tailing, 100-200 parts of water, 20-70 parts of cement, 25-50 parts of lime, 0.2-0.5 part of aluminum powder and 25-50 parts of foam stabilizer.
In view of the above-mentioned related art, the inventors believe that iron tailings, which are by-products produced in large amounts in industrial production, are used in concrete blocks to provide reasonable utilization of materials, but the iron tailings have poor gel properties and poor bonding properties with other component materials, and the strength of the concrete blocks without the iron tailings is often poor, resulting in limited application of the iron tailings, and therefore, there is a need to propose a solution to solve the above-mentioned technical problems.
Disclosure of Invention
In order to solve the application defect of the iron tailings in the aerated concrete block, the obtained aerated concrete block has excellent strength, and the application provides an environment-friendly aerated concrete block.
In a first aspect, the application provides an environment-friendly aerated concrete block, which adopts the following technical scheme:
an environment-friendly aerated concrete block comprises the following raw materials in parts by weight:
80-100 parts of cement;
20-40 parts of lime powder;
50-80 parts of fly ash;
80-100 parts of stones;
50-80 parts of modified iron tailings;
350-500 parts of water;
10-20 parts of foaming agent;
2-6 parts of foam stabilizer;
5-12 parts of water reducer;
the modified iron tailings are prepared by the following steps:
s1, taking iron tailings, clay and gypsum according to the weight ratio of (10-15) (4-7) (1), uniformly mixing, adding water, wet-grinding for 2-3h, and then drying to obtain a pretreatment material;
s2, calcining the pretreated material in the step S1 at 100-300 ℃, 500-700 ℃ and 800-900 ℃ for 2-3 hours respectively, cooling and grinding to obtain the modified iron tailings.
By adopting the technical scheme, in the modification process of the iron tailings, clay and gypsum play a certain modification role on the iron tailings in a high-temperature state, so that the appearance of the iron tailings is obviously changed, the original iron tailings are not tightly connected, the gel activity of the particle surface is low, the modified iron tailings obtained after modification are larger in particles, and a gelled substance layer exists on the particle surface, so that the particles are more tightly connected and have higher gel activity. Meanwhile, the surface structure of the modified iron tailing is enriched, and the modified iron tailing has good and stable combination with other raw materials, so that the structural strength of the whole system is further improved. Therefore, the modified iron tailings are added and used, the obtained environment-friendly aerated concrete block can overcome the defects brought by the application of the iron tailings, has excellent and stable structural strength, greatly reduces the application limit of the iron tailings, and has obvious progress in environmental protection.
Preferably, in the step S1, the weight ratio of the iron tailings to the clay to the gypsum is 14:5:1.
By adopting the technical scheme, the iron tailings, the clay and the gypsum with the weight ratio have the most excellent matching effect in the modification process, and the finally obtained modified iron tailings can show excellent gel affinity when being applied to the environment-friendly aerated concrete block so as to ensure the structural strength of the environment-friendly aerated concrete block.
Preferably, 15-35 parts by weight of functional auxiliary agent is also added into the raw materials of the environment-friendly aerated concrete block, the functional auxiliary agent consists of red mud and phosphorus tailings, and the weight ratio of the red mud to the phosphorus tailings is (1.3-2.1): 1.
By adopting the technical scheme, the red mud is industrial solid waste discharged when alumina is extracted by the aluminum industry, and can play a good role in gel filling; the phosphorus tailings can serve as a framework, so that the strength of the environment-friendly aerated concrete block is improved; when the red mud and the phosphorus tailings form the functional auxiliary agent, the functional auxiliary agent can play a role in compounding and synergy, and form a gel skeleton which is mutually intersected with the modified iron tailings, so that the structural strength of the environment-friendly aerated concrete block is greatly improved.
Preferably, the weight ratio of the red mud to the phosphorus tailings is 1.5:1.
By adopting the technical scheme, the functional auxiliary agent composed of the red mud and the phosphorus tailings in the weight ratio has the most excellent effect in the application process, and has better matching effect with the modified iron tailings, thereby obtaining the environment-friendly aerated concrete block with excellent structural strength.
Preferably, the foaming agent is one or a combination of more of aluminum powder, hydrogen peroxide and bleaching powder.
By adopting the technical scheme, the foaming agent can generate gas in slurry formed by the raw materials of all the components to form a large number of tiny and uniform air pockets which are mutually independent and uniformly distributed in cement paste to form a large number of closed pores, so that the obtained environment-friendly aerated concrete block forms an excellent and stable reticular structure system after being solidified.
Preferably, the foam stabilizer is one or a combination of more of gleditsia sinensis powder, oxidized paraffin, polyacrylamide and polyvinyl alcohol.
Through adopting above-mentioned technical scheme, the compactness of bubble, the toughness of reinforcing bubble wall can be increased to above-mentioned kind of foam stabilizer, ensures the withstand voltage ability of bubble, reduces the probability of breaking of bubble, and then can guarantee the whole quality of environmental protection aerated concrete block.
Preferably, the water reducing agent is one or a combination of a plurality of polycarboxylate water reducing agents, lignin water reducing agents and naphthalene sulfonate water reducing agents.
By adopting the technical scheme, the water reducer of the type can enable slurry formed by the raw materials of all components to have excellent fluidity, and further enable the environment-friendly aerated concrete block obtained by post-forming to have a stable structure.
In a second aspect, the application provides a preparation method of an environment-friendly aerated concrete block, which adopts the following technical scheme:
the preparation method of the environment-friendly aerated concrete block comprises the following steps:
(1) Preparing raw materials comprising cement, lime powder, fly ash, cobble, modified iron tailings, water, a foaming agent, a foam stabilizer and a water reducing agent according to a proportion;
(2) Mixing the modified iron tailings in the step (1) with water, and then adding mud, lime powder, fly ash, cobble, foaming agent, foam stabilizer and water reducing agent to obtain slurry;
(3) Pouring the slurry obtained in the step (2) into a mould, primarily curing and forming, removing the mould, dividing, and performing steam curing to obtain the environment-friendly aerated concrete block.
By adopting the technical scheme, the preparation steps of the environment-friendly aerated concrete block are fewer, the process is simple, and the mass production is convenient. And the raw materials of the components are added step by step for mixing, so that the quality control is easy to carry out in the process. Meanwhile, the whole primary curing molding is adopted, steam curing is carried out after the re-cutting, so that the raw materials of the components can fully play roles and cooperate, and the quality of the environment-friendly aerated concrete block is guaranteed.
In summary, the application has the following beneficial effects:
1. according to the application, the modified iron tailings with excellent gel activity are obtained by modifying the iron tailings, so that the obtained environment-friendly aerated concrete block can overcome the defects brought by the application of the iron tailings, and has excellent and stable structural strength; meanwhile, the modified iron tailings can be effectively utilized in a large amount, and the whole applicability is outstanding;
2. functional auxiliary agents consisting of red mud and phosphorus tailings are added, so that a compound synergistic effect can be achieved, and gel frameworks which are mutually intersected with the modified iron tailings are formed, so that the structural strength of the environment-friendly aerated concrete block is greatly improved.
Detailed Description
The present application will be described in further detail with reference to examples.
The raw materials used in the examples of the present application are all commercially available except for the specific descriptions:
iron tailings and phosphorus tailings are purchased from environmental protection technology Co.Ltd in North Dajiang of lake, and the fineness modulus is 2.0;
clay is purchased from Wanzhu mineral products limited company in Chengshou county, granularity 300 mesh, grade two;
gypsum is purchased from Jinan Hongda chemical industry Co., ltd, industrial grade gypsum powder;
cement was purchased from teny cement po.42.5;
the stone is basalt material and is prepared by grading broken stone with the specification of 4-6mmm and 8-12mmm according to the mass ratio of 1:1.5;
the fly ash is first-grade fly ash purchased from Shijia Daheng mineral products processing limited company, and has a specification of 200 meshes;
the polycarboxylate water reducer is purchased from Guangzhou desert building material science and technology Co., ltd, and is model MT2800;
red mud is purchased from the red mud sales department of Yingguo county.
Examples of preparation of starting materials and/or intermediates
Preparation example 1
The modified iron tailings are prepared by the following steps:
s1, taking iron tailings, clay and gypsum, uniformly mixing according to the weight ratio of 14:5:1, adding water, carrying out wet grinding for 2.5 hours, and then drying to obtain a pretreatment material;
s2, calcining the pretreated material in the step S1 at 200 ℃, 600 ℃ and 850 ℃ for 2.5 hours respectively, cooling and grinding to obtain the modified iron tailings.
Preparation example 2
The modified iron tailings are prepared by the following steps:
s1, taking iron tailings, clay and gypsum, uniformly mixing according to the weight ratio of 14:5:1, adding water, carrying out wet grinding for 2 hours, and then drying to obtain a pretreatment material;
s2, calcining the pretreated material in the step S1 at 300 ℃, 700 ℃ and 900 ℃ for 2 hours respectively, cooling and grinding to obtain the modified iron tailings.
Preparation example 3
The modified iron tailings are prepared by the following steps:
s1, taking iron tailings, clay and gypsum, uniformly mixing according to the weight ratio of 14:5:1, adding water, carrying out wet grinding for 3 hours, and then drying to obtain a pretreatment material;
s2, calcining the pretreated material in the step S1 at the temperature of 100 ℃ and the temperature of 500 ℃ and the temperature of 800 ℃ for 3 hours respectively, cooling and grinding to obtain the modified iron tailings.
Preparation example 4
The modified iron tailings differ from preparation example 1 in that in step S1, the weight ratio of iron tailings, clay and gypsum is 12.5:5.5:1.
Preparation example 5
The modified iron tailings are different from the preparation example 1 in that in the step S1, the weight ratio of the iron tailings, clay and gypsum is 10:4:1.
Preparation example 6
The modified iron tailings are different from the preparation example 1 in that in the step S1, the weight ratio of the iron tailings, clay and gypsum is 15:7:1.
Examples
Example 1
The environment-friendly aerated concrete block is prepared from the following components in parts by weight as shown in table 1: (1) Preparing raw materials comprising cement, lime powder, fly ash, cobble, modified iron tailings, water, a foaming agent, a foam stabilizer and a water reducing agent according to a proportion;
(2) Mixing the modified iron tailings in the step (1) with water, and then adding mud, lime powder, fly ash, cobble, foaming agent, foam stabilizer and water reducing agent to obtain slurry;
(3) Pouring the slurry obtained in the step (2) into a mold, performing primary curing and molding at a primary curing temperature of 50 ℃ for 2h, performing demolding and segmentation, performing steam curing, vacuumizing to a pressure of 0.06MPa, maintaining for 0.5h, boosting to a pressure of 1.5MPa, and maintaining at a constant pressure for 8h to obtain the environment-friendly aerated concrete block.
Note that: the foaming agent in the steps is aluminum powder; the foam stabilizer is oxidized paraffin; the water reducer is a polycarboxylate water reducer; the modified iron tailings were obtained in preparation example 1.
Examples 2 to 3
An environment-friendly aerated concrete block is different from example 1 in that each component and its corresponding weight are shown in table 1.
Table 1 Components in examples 1-3 and parts by weight (kg/part)
| Component (A) | Example 1 | Example 2 | Example 3 |
| Cement and its preparation method | 90 | 80 | 100 |
| Lime powder | 30 | 20 | 40 |
| Fly ash | 65 | 50 | 80 |
| Stone | 90 | 80 | 100 |
| Modified iron tailings | 65 | 50 | 80 |
| Water and its preparation method | 425 | 350 | 500 |
| Foaming agent | 15 | 10 | 20 |
| Foam stabilizer | 4 | 2 | 6 |
| Water reducing agent | 8.5 | 5 | 12 |
Example 4
An environmentally friendly aerated concrete block, differing from example 1 in that a modified iron tailing was obtained in preparation example 2.
Example 5
An environmentally friendly aerated concrete block, differing from example 1 in that a modified iron tailing was obtained in preparation example 3.
Example 6
An environmentally friendly aerated concrete block, differing from example 1 in that a modified iron tailing was obtained in preparation example 4.
Example 7
An environmentally friendly aerated concrete block, differing from example 1 in that a modified iron tailing was obtained in preparation example 5.
Example 8
An environmentally friendly aerated concrete block, differing from example 1 in that a modified iron tailing was obtained in preparation example 6.
Example 9
An environment-friendly aerated concrete block is different from the embodiment 1 in that the foaming agent is hydrogen peroxide.
Example 10
An environment-friendly aerated concrete block is different from the embodiment 1 in that the foam stabilizer consists of gleditsia sinensis powder and polyacrylamide according to the weight ratio of 1:1.
Example 11
An environment-friendly aerated concrete block is different from the embodiment 1 in that the water reducer is naphthalene sulfonate water reducer.
Example 12
An environment-friendly aerated concrete block is different from the embodiment 1 in that the step (2) is specifically provided, wherein the modified iron tailings in the step (1) are mixed with water, and then mud, lime powder, fly ash, cobble, foaming agent, foam stabilizer, water reducing agent and functional auxiliary agent are added for mixing to obtain slurry; the functional auxiliary agent comprises 25 parts by weight of red mud and phosphorus tailings in a weight ratio of 1.5:1.
Example 13
An environment-friendly aerated concrete block is different from embodiment 12 in that the functional auxiliary agent consists of red mud and phosphorus tailings according to the weight ratio of 1.3:1.
Example 14
An environment-friendly aerated concrete block is different from embodiment 12 in that the functional auxiliary agent consists of red mud and phosphorus tailings according to the weight ratio of 2.1:1.
Example 15
An environment-friendly aerated concrete block is different from embodiment 12 in that the functional auxiliary agent consists of red mud and phosphorus tailings according to the weight ratio of 1.7:1.
Example 16
An environment-friendly aerated concrete block is different from example 12 in that the functional auxiliary agent is 15 parts by weight.
Example 17
An environment-friendly aerated concrete block is different from example 12 in that the functional auxiliary agent is 35 parts by weight.
Example 18
An environment-friendly aerated concrete block is different from embodiment 12 in that the functional auxiliary agent is red mud.
Example 19
An environment-friendly aerated concrete block is different from embodiment 12 in that the functional auxiliary agent is phosphorus tailing.
Comparative example
Comparative example 1
An environment-friendly aerated concrete block is different from the embodiment 1 in that the quality of the modified iron tailings is replaced by the iron tailings.
Comparative example 2
An environment-friendly aerated concrete block is different from example 12 in that the component raw materials do not contain modified iron tailings.
Comparative example 3
An environment-friendly aerated concrete block is different from the embodiment 1 in that the component raw materials do not contain modified iron tailings.
Performance test samples: the environment-friendly aerated concrete blocks obtained in examples 1 to 19 were used as test samples 1 to 19, and the environment-friendly aerated concrete blocks obtained in comparative examples 1 to 3 were used as control samples 1 to 3.
The test method comprises the following steps: test samples 1 to 19 and control samples 1 to 3 were each prepared as 10 standard test pieces of 4 cm. Times.4 cm. Times.16 cm, each of the standard test pieces was then cured in a standard curing box having a temperature of 20℃and a humidity of 85% for 24 hours, and finally after curing in water at 20℃for 28 days, the compressive strength of each of the standard test pieces was measured according to the requirements in the "cement mortar strength test method" prescribed in Standard GB/T17671-1999, and the compressive strength averages of 10 standard test pieces were taken corresponding to test samples 1 to 19 and control samples 1 to 3 and recorded in Table 2.
TABLE 2 test results for test samples 1-19 and control samples 1-3
It can be seen from the combination of the examples 1 and the comparative examples 1-2 and the combination of the table 2 that the application of the modified iron tailings can greatly improve the compressive strength of the aerated concrete block, and compared with the aerated concrete block using the common iron tailings, the aerated concrete block using the modified iron tailings has obvious compressive strength advantage, so that the defects of the iron tailings raw materials are overcome, and the overall application is greatly improved.
It can be seen from the combination of example 1 and examples 12-17 and the combination of table 2 that the addition of the functional auxiliary agent consisting of red mud and phosphorus tailings can greatly improve the compressive strength of the aerated concrete block as a whole. And by combining the embodiments 18-19, one of the red mud and the phosphorus tailings is used as a functional auxiliary agent independently, so that the effect of improving the compressive strength of the aerated concrete block is not better than the effect brought by the combination of the two, and the red mud and the phosphorus tailings play an excellent compounding synergistic effect in the aerated concrete block.
It can be seen from the combination of the embodiment 1, the embodiment 12-17 and the comparative example 2-3 and the table 2 that the independent use of the functional auxiliary agent or the independent use of the modified iron tailings has limited lifting effect, which indicates that the functional auxiliary agent composed of red mud and phosphorus tailings can better cooperate with the modified iron tailings to play a role, and the functional auxiliary agent composed of red mud and phosphorus tailings can play an effect of 1+1 to more than 2 with the modified iron tailings, thereby obviously improving the compressive strength of the aerated concrete block.
The present embodiment is only for explanation of the present application and is not to be construed as limiting the present application, and modifications to the present embodiment, which may not creatively contribute to the present application as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present application.
Claims (7)
1. The environment-friendly aerated concrete block is characterized by being prepared from the following raw materials in parts by weight:
80-100 parts of cement;
20-40 parts of lime powder;
50-80 parts of fly ash;
80-100 parts of stones;
50-80 parts of modified iron tailings;
350-500 parts of water;
10-20 parts of foaming agent;
2-6 parts of foam stabilizer;
5-12 parts of water reducer;
15-35 parts of functional auxiliary agent;
the modified iron tailings are prepared by the following steps:
s1, taking iron tailings, clay and gypsum according to the weight ratio of (10-15) (4-7) (1), uniformly mixing, adding water for wet grinding for 2-3 hours, and then drying to obtain a pretreatment material;
s2, calcining the pretreated material in the step S1 at 100-300 ℃, 500-700 ℃ and 800-900 ℃ for 2-3 hours respectively, cooling and grinding to obtain modified iron tailings;
the functional auxiliary agent consists of red mud and phosphorus tailings, and the weight ratio of the red mud to the phosphorus tailings is (1.3-2.1): 1.
2. The environmentally friendly aerated concrete block of claim 1, wherein: in the step S1, the weight ratio of the iron tailings to the clay to the gypsum is 14:5:1.
3. The environmentally friendly aerated concrete block of claim 1, wherein: the weight ratio of the red mud to the phosphorus tailings is 1.5:1.
4. The environmentally friendly aerated concrete block of claim 1, wherein: the foaming agent is one or a combination of more of aluminum powder, hydrogen peroxide and bleaching powder.
5. The environmentally friendly aerated concrete block of claim 1, wherein: the foam stabilizer is one or a combination of more of gleditsia sinensis powder, oxidized paraffin, polyacrylamide and polyvinyl alcohol.
6. The environmentally friendly aerated concrete block of claim 1, wherein: the water reducing agent is one or a combination of a plurality of polycarboxylate water reducing agent, lignin water reducing agent and naphthalene sulfonate water reducing agent.
7. The method for preparing the environment-friendly aerated concrete block as claimed in claim 1, which is characterized by comprising the following steps:
(1) Preparing raw materials comprising cement, lime powder, fly ash, cobble, modified iron tailings, water, a foaming agent, a foam stabilizer and a water reducing agent according to a proportion;
(2) Mixing the modified iron tailings in the step (1) with water, and then adding cement, lime powder, fly ash, cobble, foaming agent, foam stabilizer, water reducing agent and functional auxiliary agent to mix to obtain slurry;
(3) Pouring the slurry obtained in the step (2) into a mould, primarily curing and forming, removing the mould, dividing, and performing steam curing to obtain the environment-friendly aerated concrete block.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104876627A (en) * | 2014-09-22 | 2015-09-02 | 河北工程大学 | Method for preparing aerated concrete from gangue and iron tailings |
| CN109879653A (en) * | 2019-04-19 | 2019-06-14 | 铜陵铜冠建安新型环保建材科技有限公司 | The processing method of high-strength iron tailings air-entrained concrete building block |
| CN113563104A (en) * | 2021-08-04 | 2021-10-29 | 永兴县恒鑫高科新型环保建材有限公司 | Autoclaved aerated concrete block and preparation method thereof |
| CN114163156A (en) * | 2021-12-24 | 2022-03-11 | 南京永能新材料有限公司 | Formula of copper tailings modified concrete and preparation method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104876627A (en) * | 2014-09-22 | 2015-09-02 | 河北工程大学 | Method for preparing aerated concrete from gangue and iron tailings |
| CN109879653A (en) * | 2019-04-19 | 2019-06-14 | 铜陵铜冠建安新型环保建材科技有限公司 | The processing method of high-strength iron tailings air-entrained concrete building block |
| CN113563104A (en) * | 2021-08-04 | 2021-10-29 | 永兴县恒鑫高科新型环保建材有限公司 | Autoclaved aerated concrete block and preparation method thereof |
| CN114163156A (en) * | 2021-12-24 | 2022-03-11 | 南京永能新材料有限公司 | Formula of copper tailings modified concrete and preparation method thereof |
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