CN113493328A - Flood prevention backup stone material and preparation method thereof - Google Patents
Flood prevention backup stone material and preparation method thereof Download PDFInfo
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- CN113493328A CN113493328A CN202110799844.7A CN202110799844A CN113493328A CN 113493328 A CN113493328 A CN 113493328A CN 202110799844 A CN202110799844 A CN 202110799844A CN 113493328 A CN113493328 A CN 113493328A
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- stone material
- stone
- flood prevention
- stirring
- fly ash
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- 239000004575 stone Substances 0.000 title claims abstract description 42
- 239000000463 material Substances 0.000 title claims abstract description 32
- 230000002265 prevention Effects 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title abstract description 10
- 239000010881 fly ash Substances 0.000 claims abstract description 25
- 239000003513 alkali Substances 0.000 claims abstract description 19
- 239000002994 raw material Substances 0.000 claims abstract description 16
- 239000012190 activator Substances 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 13
- 239000011575 calcium Substances 0.000 claims abstract description 12
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 239000002131 composite material Substances 0.000 claims abstract description 6
- 239000002002 slurry Substances 0.000 claims abstract description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 33
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 13
- 235000019353 potassium silicate Nutrition 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 239000004568 cement Substances 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 3
- 239000013049 sediment Substances 0.000 abstract description 3
- 238000007580 dry-mixing Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 238000001994 activation Methods 0.000 abstract 1
- 230000004913 activation Effects 0.000 abstract 1
- 238000007725 thermal activation Methods 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 239000004576 sand Substances 0.000 description 5
- 230000005284 excitation Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000008235 industrial water Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 229910000144 sodium(I) superoxide Inorganic materials 0.000 description 3
- 239000008399 tap water Substances 0.000 description 3
- 235000020679 tap water Nutrition 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 239000004115 Sodium Silicate Substances 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 229910052911 sodium silicate Inorganic materials 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 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
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 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
- C04B28/006—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 mineral polymers, e.g. geopolymers of the Davidovits type
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Engineering & Computer Science (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a flood prevention backup stone material which comprises the following raw materials in percentage by mass: 40-60% of low-calcium fly ash, 24-36% of a mixture of silt and stone, 8-10% of a composite alkali activator and 8-16% of water. The preparation method comprises the following steps: mixing the raw materials according to a ratio, and performing dry mixing; adding water according to the water consumption required by the dry density, stirring by using a pure slurry stirrer, firstly stirring at a low speed, and then stirring at a high speed to obtain uniform pug; the pug is autoclaved and cured for one day and then is subjected to standard curing. The invention avoids the defect of over-fast setting time of the traditional alkali-activated cement, takes the yellow river sediment deposited at the middle and lower reaches of the yellow river as the main material, is locally obtained, has easily obtained raw materials, saves the transportation cost, saves energy and protects the environment, combines the modes of chemical activation and thermal activation, ensures that the activity of the fly ash can be fully exerted, improves the utilization rate of the low-calcium fly ash, has simple preparation process, improves the mechanical property of the product and shortens the curing time.
Description
Technical Field
The invention relates to a building material and a preparation method thereof, in particular to a flood prevention backup stone material and a preparation method thereof.
Background
The yellow river silt has certain volcanic ash activity, the yellow river silt mainly comprising silicon-aluminum components such as SiO2, Al2O3 and Fe2O3 is used as a basic raw material, the yellow river silt has great utilization value and wide application prospect, but the yellow river silt contains less mineral components which can be converted into gelled products, the yellow river silt material developed by an alkali-activated modification technology is generally low in strength and difficult to reach the strength standard for building materials, an activator is the key for preparing the alkali-activated cementitious material, the composition and parameters of the activator are main reasons influencing the performance of the alkali-activated cementitious material, but in the current research, the single activator is adopted to activate and modify the yellow river silt, and only sodium silicate is used in the patent of alkali-activated yellow river silt, such as patent CN 109251003A, and the method prepares the finished baking-free brick in a mode of extruding the raw material of fine silt, calcined fine sand and sodium silicate. The method has the disadvantages of complicated operation process, high cost, and the need of adding 10% clay into the raw material of argillaceous fine sand and calcining the mixture at 1050 ℃ and 1150 ℃ for 2 hours. In addition, the utilization rate of the fly ash is not high, and patent CN201010155899.6 relates to a sludge-high calcium fly ash alkali-activated cement and a preparation method thereof, which improve the utilization rate of the sludge and the high calcium fly ash, but have higher cost. Most of the existing fly ash is low-calcium fly ash, so that the utilization rate is low, and the single alkaline excitation strength is low.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a flood prevention backup sand control material, which solves the problems of low utilization rate of the existing low-calcium fly ash, low early strength, slow strength increase, high preparation cost and complex method of the existing flood prevention backup sand control material.
The technical scheme is as follows: the flood prevention standby stone material comprises the following raw materials in percentage by mass:
40-60% of low-calcium fly ash, 24-36% of a mixture of silt and stone, 8-10% of a composite alkali activator and 8-16% of water.
Wherein the ratio of the silt to the stones in the silt and stone mixture is 1: 1.
The composite alkali activator comprises water glass and sodium hydroxide, wherein the mass ratio of the water glass to the sodium hydroxide is 5: 3.
The silt is yellow river silt, and the stones are small stones.
The preparation method of the flood prevention stone material is characterized by comprising the following steps of:
(1) mixing the raw materials according to a ratio, and performing dry stirring for 3-5 min;
(2) adding water according to the water consumption required by the dry density, stirring by using a pure slurry stirrer, firstly stirring at a low speed for 300-400 s, and then stirring at a high speed for 90-120 s to obtain uniform pug;
(3) and (3) performing autoclaved curing on the pug at a high temperature of 100-120 ℃ for one day, and performing standard curing to obtain the flood-prevention standby stone material.
The standard curing temperature in the step (3) is 20 +/-3 ℃, and the relative humidity is 70 +/-5%.
The technical principle is as follows: under the action of an alkali activator, hydration products around the yellow river sediment and the fly ash particles are dense, wherein the fly ash is subjected to polymerization reaction, and an N-A-S-H product is formed through depolymerization-polycondensation reaction of vitreous and alkali, so that the material activity can be fully excited, more aluminosilicate gel is generated to fill the system cracks, the internal pore structure of the matrix is improved, and the strength of A test piece is improved. The introduction of the large-amount fly ash and the composite alkaline activator has obvious early mechanical property and microstructure modification effect on the alkali-activated modified yellow river sediment-fly ash-based artificial flood prevention stone, and provides a new idea for comprehensive utilization of solid waste fly ash and yellow river sediment.
Has the advantages that: the invention avoids the defect that the setting time of the traditional alkali-activated cement is too fast, the fly ash is used as an admixture, the sodium hydroxide and the water glass are mixed to be used as an activator to carry out alkali-activated modification on the yellow river silt, the yellow river silt deposited at the middle and lower reaches of the yellow river is used as a main material, the materials are obtained locally, the raw materials are easy to obtain, the transportation cost is saved, the energy is saved, the environment is protected, the reasonable utilization of the yellow river silt slows down the deposition of the river bed at the middle and lower reaches of the yellow river, the chemical excitation and thermal excitation modes are combined, the activity of the fly ash can be fully exerted, the utilization rate of the low-calcium fly ash is improved, the preparation process is simple, the mechanical property of the product is improved, and the curing time is shortened.
Detailed Description
The present application is further illustrated below with reference to examples.
Example 1
The flood prevention backup stone material comprises the following raw materials in percentage by weight:
the low-calcium fly ash is purchased F-class II-grade fly ash, and the doping amount is 50 percent; the mixing amount of the silt is 15 percent; the small stones are crushed stones with the grain size of 5-20 mm in continuous gradation, and the mixing amount is 15%; the alkali activator is prepared from industrial water glass and sodium hydroxide according to the mass ratio of 5:3, the mixing amount is 8%, wherein: sodium hydroxide is analytically pure, SiO in water glass229.84 percent of NaO2The mass content is 13.36 percent, and the modulus of the water glass is 2.3; the tap water content was 12%.
Example 2
The flood prevention backup stone material comprises the following raw materials in percentage by weight:
the low-calcium fly ash is purchased F-class II-grade fly ash, and the doping amount is 40 percent; the mixing amount of the silt is 18 percent; the small stones are crushed stones with the grain size of 5-20 mm in continuous gradation, and the mixing amount is 18%; the alkali activator is prepared from industrial water glass and sodium hydroxide according to the mass ratio of 5:3, the mixing amount is 10%, wherein: sodium hydroxide is analytically pure, SiO in water glass229.84 percent of NaO2The mass content is 13.36 percent, and the modulus of the water glass is 2.3; the tap water content was 14%.
Example 3
The flood prevention backup stone material comprises the following raw materials in percentage by weight:
the low-calcium fly ash is purchased F-class II-grade fly ash, and the doping amount is 57 percent; the mixing amount of the silt is 12 percent; the small stones are crushed stones with the grain size of 5-20 mm and continuous gradation, and the mixing amount is 12%; the alkali activator is prepared from industrial water glass and sodium hydroxide according to the mass ratio of 5:3, the mixing amount is 9%, wherein: sodium hydroxide is analytically pure, SiO in water glass229.84 percent of NaO2The mass content is 13.36 percent, and the modulus of the water glass is 2.3; tap water is 10%.
When the flood-prevention and backup-control stone material of the embodiment 1-3 is prepared, weighing the raw materials according to the proportion, mixing the raw materials together, dry-mixing for 5min, adding water according to the water consumption required by the wet density, stirring by using a clear paste stirrer, firstly stirring at a low speed for 300s, then stirring at a high speed for 90s to obtain uniform mud materials, firstly carrying out autoclaved curing at a high temperature of 100-120 ℃ for one day, and then carrying out standard curing to obtain the flood-prevention and backup-control stone material, wherein the standard curing temperature is 20 +/-3 ℃, and the relative humidity is 70 +/-5%.
When preparing the stone, the material is placed in a forming bin, extruded into a cube by special forming equipment to prepare the stone, and naturally cured for 7 days to obtain a finished product of the stone.
In order to test the flood-prevention prepared anti-sand material, the materials of the embodiments 1 to 3 are made into test blocks, the mould is coated with engine oil, mud is added into the mould with the gasket at the bottom in three layers, each layer is added, and after each layer is respectively pounded, the mixture is pressed on a pressure testing machine at the constant acceleration of 5k N/s; and (5) demolding after keeping the pressure for 5min, putting the demolded test block into a curing room for classified curing for different periods, and carrying out performance test on the prepared test block. Meanwhile, the on-site forming test is closer to the actual engineering, the prepared flood prevention stone is produced on site by adopting a rolling working mode, then a core drilling method is adopted, the appearance quality of the taken flood prevention stone core sample is better, the surface of the core sample has no defects of air holes and the like, wherein,
the test piece (2) was used for the compression resistance test.
The compressive strengths of the samples prepared in examples 1 to 3 were measured by a CDT 1305-2 microcomputer-controlled electronic pressure tester, and as shown in Table 1, it was found from Table 1 that the compressive strengths of the samples tended to increase with the increase in the curing age. The speed is increased rapidly when the early curing age is 3d and 7d, the compressive strength can reach 16MPa, 19MPa and 18MPa, and is more than 10MPa, and the design strength requirement is completely met.
TABLE 1 sample compressive strength (MPa) at different ages
Claims (6)
1. A flood prevention backup stone material is characterized by comprising the following raw materials in percentage by mass:
40-60% of low-calcium fly ash, 24-36% of a mixture of silt and stone, 8-10% of a composite alkali activator and 8-16% of water.
2. The flood prevention backup stone material according to claim 1, wherein the ratio of silt to stone in the mixture of silt and stone is 1: 1.
3. The flood prevention backup stone material according to claim 1, wherein the composite alkali activator comprises water glass and sodium hydroxide, and the mass ratio of the water glass to the sodium hydroxide is 5: 3.
4. The flood prevention backup stone material according to claim 1, wherein the stones are crushed stones of 5-20 mm continuous gradation.
5. The method for preparing the flood prevention stone material according to claim 1, comprising the following steps:
(1) mixing the raw materials according to a ratio, and performing dry stirring for 3-5 min;
(2) adding water according to the water consumption required by the wet density, stirring by using a pure slurry stirrer, firstly stirring at a low speed for 300-400 s, and then stirring at a high speed for 90-120 s to obtain uniform pug;
(3) and (3) performing autoclaved curing on the pug at a high temperature of 100-120 ℃ for one day, and performing standard curing to obtain the flood-prevention standby stone material.
6. The method for preparing the flood prevention stone material according to claim 5, wherein the standard curing temperature in the step (3) is 20 +/-3 ℃, and the relative humidity is 70 +/-5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110799844.7A CN113493328A (en) | 2021-07-15 | 2021-07-15 | Flood prevention backup stone material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110799844.7A CN113493328A (en) | 2021-07-15 | 2021-07-15 | Flood prevention backup stone material and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN113493328A true CN113493328A (en) | 2021-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110799844.7A Pending CN113493328A (en) | 2021-07-15 | 2021-07-15 | Flood prevention backup stone material and preparation method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN113493328A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115159941A (en) * | 2022-06-28 | 2022-10-11 | 河南建博新材料科技有限公司 | Fine sand consolidation agent and preparation method thereof |
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| CN102431081A (en) * | 2011-09-01 | 2012-05-02 | 同济大学 | Method for solidifying river sediment into building material under normal pressure |
| WO2018028225A1 (en) * | 2016-08-12 | 2018-02-15 | 卓达新材料科技集团威海股份有限公司 | Fly ash based geopolymer grouting material and preparation method therefor |
| CN108503288A (en) * | 2018-05-14 | 2018-09-07 | 大连理工大学 | A kind of artificial reserved bricks and preparation method thereof based on carbonating complex excitation |
| CN109053124A (en) * | 2018-10-23 | 2018-12-21 | 黄河勘测规划设计有限公司 | Using the preparation flood control of shale Extra-fine sand for the method for anti-stone |
| CN110668772A (en) * | 2019-09-29 | 2020-01-10 | 华北水利水电大学 | Geopolymer-based artificial prepared stone prepared from full wastes and preparation method thereof |
| CN110885209A (en) * | 2019-12-11 | 2020-03-17 | 大连理工大学 | Red mud/yellow river sediment base polymer flood prevention stone and preparation method thereof |
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2021
- 2021-07-15 CN CN202110799844.7A patent/CN113493328A/en active Pending
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| Title |
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Application publication date: 20211012 |