CN115159941A - Fine sand consolidation agent and preparation method thereof - Google Patents
Fine sand consolidation agent and preparation method thereof Download PDFInfo
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- CN115159941A CN115159941A CN202210752700.0A CN202210752700A CN115159941A CN 115159941 A CN115159941 A CN 115159941A CN 202210752700 A CN202210752700 A CN 202210752700A CN 115159941 A CN115159941 A CN 115159941A
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- 239000004576 sand Substances 0.000 title claims abstract description 77
- 238000007596 consolidation process Methods 0.000 title claims abstract description 48
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 43
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 83
- 239000000463 material Substances 0.000 claims abstract description 37
- 239000004575 stone Substances 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 24
- 238000002156 mixing Methods 0.000 claims abstract description 24
- 239000000843 powder Substances 0.000 claims abstract description 12
- 230000008569 process Effects 0.000 claims abstract description 11
- 239000008399 tap water Substances 0.000 claims abstract description 8
- 235000020679 tap water Nutrition 0.000 claims abstract description 8
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 4
- 239000010440 gypsum Substances 0.000 claims abstract description 4
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 4
- 238000012360 testing method Methods 0.000 claims description 83
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 41
- 238000007710 freezing Methods 0.000 claims description 28
- 230000008014 freezing Effects 0.000 claims description 22
- 230000002265 prevention Effects 0.000 claims description 21
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 16
- 238000010257 thawing Methods 0.000 claims description 16
- 239000004568 cement Substances 0.000 claims description 11
- 230000003628 erosive effect Effects 0.000 claims description 10
- 238000010998 test method Methods 0.000 claims description 9
- 238000005260 corrosion Methods 0.000 claims description 6
- 230000007797 corrosion Effects 0.000 claims description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 6
- 230000007774 longterm Effects 0.000 claims description 6
- 239000011707 mineral Substances 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 4
- 238000011049 filling Methods 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 229910001570 bauxite Inorganic materials 0.000 claims description 3
- 239000000378 calcium silicate Substances 0.000 claims description 3
- 229910052918 calcium silicate Inorganic materials 0.000 claims description 3
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 claims description 3
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid group Chemical group C(CC(O)(C(=O)O)CC(=O)O)(=O)O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000010881 fly ash Substances 0.000 claims description 3
- 235000019353 potassium silicate Nutrition 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000002474 experimental method Methods 0.000 claims description 2
- 239000000499 gel Substances 0.000 claims 13
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 238000003756 stirring Methods 0.000 abstract description 3
- 230000004913 activation Effects 0.000 abstract 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 abstract 1
- 229910052814 silicon oxide Inorganic materials 0.000 abstract 1
- 230000008901 benefit Effects 0.000 description 6
- 239000011148 porous material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 230000003213 activating effect Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002105 nanoparticle Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000002956 ash Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000013081 microcrystal Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229910052615 phyllosilicate Inorganic materials 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
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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
- C04B28/14—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 calcium sulfate 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
- C04B2111/20—Resistance against chemical, physical or biological attack
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2015—Sulfate resistance
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
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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)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a silty sand consolidation agent and a preparation method thereof, wherein the silty sand consolidation agent is prepared from the following components: the weight portion is as follows: 50-70 parts of yellow powder river fine sand, 30-45 parts of gel and 10-20 parts of tap water; the method comprises the following steps: and (3) mixing the air-dried yellow river fine silt, the gel and the gypsum powder according to the ratio of 7:2:1, adding tap water into a mixer, continuously mixing for 20min, continuously mixing for 40min, controlling the mixing temperature to be 50-70 ℃ in the mixing process, wherein some active silicon oxide and active aluminum oxide participate in polymerization reaction in the fine silt of the argillaceous powder in the mixing process, and the consolidation agent is prepared by adding a corresponding cementing material into the yellow river silt, and preparing the yellow river silt into flood control stones to replace natural stones through process flows such as activation stirring and the like.
Description
Technical Field
The invention relates to the technical field of preparation of a yellow river silt consolidation agent, in particular to a silt consolidation agent and a preparation method thereof.
Background
The yellow river argillaceous fine sand is yellow river argillaceous sand for short, and is river sediment at the downstream of a yellow river. The reason why the yellow river has a large amount of silt is that the yellow river flows through the loess plateau, the impact force of water flow is too large, and a large amount of water and soil are lost. The yellow river carries a large amount of silt, and when the yellow river flows through the middle and the lower reaches, the flow speed is slowly slowed, so that a large amount of silt is deposited, the yellow river becomes a famous overground hanging river in the world, and a breach happens for countless times in history until the yellow river has high risk potential in every flood season at present, so that the yellow river is a river with much disasters and difficulties in history. The elevation of the suspended river is large, the river channel curves back and bends quickly, great difficulty is brought to flood prevention and control of the yellow river, the riverbed can be further lifted by annual deposition of yellow river silt, the yellow river silt can erode fertile farmland, soil flies when meeting wind, the environment is deteriorated, and the ecology is seriously influenced.
The novel artificial flood prevention dike dam material formed by solidifying the river silt is a new subject provided on the basis of the results obtained by researching the resource utilization of the river silt in recent years. The method is characterized in that corresponding curing materials are added into river silt, and the silt is made into flood prevention stones to replace natural stones through the process flows of activating, stirring and the like, so that the method is an effective solution for solving the problems of flood prevention and environmental protection. The silt is made into flood control stones for dikes, so that the cost can be reduced, a good flood control stone can be obtained, and the method has great practical significance for river bank reinforcement and flood control. The river silt consolidation technology is a method of taking the river and applying the river silt to the river, and has considerable economic benefit, resource benefit, environmental benefit, ecological benefit and social benefit.
The existing consolidation agent has insufficient recycling and reasonable utilization of the yellow river silt, and the corresponding quality of the consolidation agent is poor.
Disclosure of Invention
The invention aims to provide a fine sand consolidation agent and a preparation method thereof, and aims to solve the problems that the existing consolidation agent in the background art is insufficient in recycling and reasonable utilization of yellow river silt and has low corresponding quality.
Therefore, the invention provides a fine sand consolidation agent which is prepared from the following components: the weight portion is as follows: 50-70 parts of yellow powder river fine sand, 30-45 parts of gel and 10-20 parts of tap water.
Preferably, the gel is any one of a mineral powder-based gel material, a fly ash-based gel material, a red mud-based gel material, a citric acid residue-based gel material, a bauxite tailing-based gel material and a water glass-based gel material.
A preparation method of a fine sand consolidation agent comprises the following steps:
s1, drying the air-dried yellow river fine silt, gel and gypsum powder according to the weight ratio of 7:2:1, adding tap water into a mixer, continuously mixing for 20min, continuously mixing for 40min, controlling the mixing temperature at 50-70 ℃ in the mixing process, wherein some active silica and active alumina participate in polymerization reaction in the nano-scale particles in the argillaceous silty fine sand in the mixing process, and under the high-temperature damp-heat condition, the surface of sand grains can generate CSH and CAH gel under the action of an exciting agent, and the final structure is that calcium silicate hydrate gel and calcium aluminate hydrate gel wrap the silty fine sand particles with the surfaces reacted to form a continuous integral structure;
s2, performance detection: testing the influences of the density, fineness, safety, water consumption of standard consistency, setting time, mechanics and durability, sulfate erosion resistance, freezing resistance and mud content of the consolidation agent according to a normal experimental mode;
s3, determining the optimal dosage of the gel: filling a standard beaker with the volume of 1000ml with dry argillaceous silty fine sand with the water content close to zero, slowly adding water into another beaker filled with 500g of water until the water level is higher than the sand surface, pouring out the water higher than the sand surface after the water level is stable, weighing, and finally, adding 30%, 35%, 40% and 45% of gelled materials into the silty fine sand, wherein the total water absorbed by the silty fine sand is the porosity of the silty fine sand, and testing the generated consolidation agent, wherein the porosity of the yellow river argillaceous silty fine sand is determined to be 35.4%.
Preferably, in the step S3, the mechanical and durability tests: a batch of flood prevention stones with different proportions and different specifications are prepared and put on the right bank of the yellow river at the garden opening of the yellow river, one part of the flood prevention stones are put on the big bank of the yellow river, the other part of the flood prevention stones are put in water to test the durability of the flood prevention stones, and the compressive strength test is carried out according to the test method standard of concrete physical and mechanical properties (GB/T50081-2019).
Preferably, in the step S3, the anti-freezing performance test: the anti-freezing test is carried out according to the standard of test methods for long-term performance and durability of common concrete (GB/T50082-2009) slow freezing method, a cube with the size of a test piece of 100mm multiplied by 100mm is adopted, an automatic freezing and thawing equipment is adopted to freeze a freezing and thawing test box during the freezing period, and the temperature of the air in the freezing and thawing test box is kept in the range of (-20 to-18) DEG C; the water temperature of the concrete test piece soaked in the freeze-thaw test box is kept within the range of (18-20) DEG C during the thawing period; the temperature of each point in the freezing and thawing test box in full load is extremely different and should not exceed 2 ℃ for testing.
Preferably, in the step S3, the sulfate erosion resistance test: the sulfate corrosion resistance test is carried out according to the standard of test methods for long-term performance and durability of common concrete (GB/T50082-2009), the test piece size is a cube of 100mm multiplied by 100mm, and each group is 3 blocks. And (3) the sulfate corrosion resistance of the concrete is measured according to the maximum dry-wet cycle number in a dry-wet alternate environment.
Preferably, in the step S3, the mud content influence test: the influence of different mud contents on the compressive strength of a cement consolidation body and a consolidating agent consolidation body is tested by adding 10 to 50 percent of the mud component with the mass less than 0.08 mm.
Preferably, in the step S3, the outdoor exposure test: outdoor exposure tests are carried out on the dike venture of the yellow river garden, and the exposure tests are divided into natural exposure tests and underwater exposure tests. The test samples are prepared into cubic test pieces of 200mm and 200mm according to the mixing amount of 20%, 30% and 40%, and the test pieces are maintained for 28 days and then placed on site.
The invention provides a fine sand consolidation agent and a preparation method thereof, and the fine sand consolidation agent has the beneficial effects that:
1. the consolidation agent is prepared by adding a corresponding cementing material into yellow river sand, and preparing the yellow river sand into flood control stones for replacing natural stones through the process flows of activating, stirring and the like, so that the method is an effective solution for solving the problems of flood control and environmental protection, and the yellow river sand is prepared into the flood control stones for dikes, so that the cost can be reduced, a good flood control stone can be obtained, and the method has great practical significance for river bank reinforcement and flood control;
2. the yellow river silt has one of many benefits in preparing flood control stones, and can play a role in controlling and reducing the silt; secondly, the flood control emergency cost can be effectively reduced; thirdly, the environment can be protected, and the mountain stone is limited to be abused.
Drawings
FIG. 1 is a table of experimental results of different mixture ratios of strength;
FIG. 2 is a line graph showing the experimental results of different mixture ratios of the present invention;
FIG. 3 is a graph showing the results of the physical mechanical properties and durability tests of the consolidated bodies of the present invention;
FIG. 4 is a graph showing the results of the sulfate erosion resistance test of the solidification body of the present invention;
FIG. 5 shows the results of testing the influence of the mud content of the argillaceous silt and fine sand on the strength of the consolidation body.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to specific examples.
Referring to fig. 1-5, the present invention provides a fine sand consolidation agent, which comprises the following components: the weight portion is as follows: 50-70 parts of yellow pink fine sand, 30-45 parts of gel and 10-20 parts of tap water.
The gel is any one of a mineral powder-based gel material, a fly ash-based gel material, a red mud-based gel material, a citric acid residue-based gel material, a bauxite-based gel material and a water glass-based gel material.
A preparation method of the fine sand consolidation agent comprises the following steps:
s1, drying the air-dried yellow river fine silt, gel and gypsum powder according to the weight ratio of 7:2:1, adding tap water into a mixer, continuously mixing for 20min, continuously mixing for 40min, controlling the mixing temperature at 50-70 ℃ in the mixing process, wherein some active silica and active alumina participate in polymerization reaction in the nano-scale particles in the argillaceous silty fine sand in the mixing process, and under the high-temperature damp-heat condition, the surface of sand grains can generate CSH and CAH gel under the action of an exciting agent, and the final structure is that calcium silicate hydrate gel and calcium aluminate hydrate gel wrap the silty fine sand particles with the surfaces reacted to form a continuous integral structure;
s2, performance detection: testing the influences of the density, fineness, safety, water consumption of standard consistency, setting time, mechanics and durability, sulfate erosion resistance, freezing resistance and mud content of the consolidation agent according to a normal experimental mode;
s3, determining the optimal dosage of the gel: filling dry argillaceous fine sand with water content close to zero into a standard beaker with volume of 1000ml, slowly adding water into another beaker filled with 500g of water until the water level is higher than the sand surface, pouring out water higher than the sand surface for weighing after the water level is stabilized, wherein the total water absorbed by the fine sand is the porosity of the fine sand, and the porosity of the yellow river argillaceous fine sand is 35.4% through determination, and then respectively adding 30%, 35%, 40% and 45% of gelling materials into the fine sand to test a generated consolidation agent;
s5, performance detection: testing the influences of the density, fineness, safety, water consumption of standard consistency, setting time, mechanics and durability, sulfate erosion resistance, freezing resistance and mud content of the consolidation agent according to a normal experimental mode;
s6, determining the optimal dosage of the gel: filling a standard beaker with the volume of 1000ml with dry argillaceous fine sand with the water content close to zero, slowly adding water into the beaker with the water content of 500g until the water level is higher than the sand surface, pouring out the water higher than the sand surface after the water level is stabilized, weighing, finally, adding 30%, 35%, 40% and 45% of gelling materials into the argillaceous fine sand, and testing the generated consolidation agent, wherein the total water absorbed by the argillaceous fine sand is the porosity of the argillaceous fine sand, and the porosity of the argillaceous fine sand is 35.4% through determination.
As can be readily seen from FIG. 1 and FIG. 2, the intensity of samples 383-29 was greatest. The sample cement is present in a weight percentage very close to the measured porosity. That is, when the pores in the fine sand are completely filled with the cement, the compressive strength of the consolidated body is maximized.
It can be seen from these figures that samples 383-28 had a cement percentage of 30% which was less than 35.4% porosity of the fine sand, i.e. the pores in the fine sand were not completely filled with cement and thus the compressive strength was lowest in the 4 samples. FIGS. 4-5 show the micro-topography of the sample at 5000 magnification, where it can be seen that the pores in samples 383-28 are the largest, and there is sufficient space for the cement to crystallize to fill, thus forming a large amount of needle-like minerals, while other samples have fewer needle-like minerals because the pores between the sand grains are filled with the cement. Samples 383-29 had gelled material in a weight percent of the fine sand that was close to the porosity of the fine sand, and the voids between the sand particles were substantially filled by the gelled material, thereby maximizing the compressive strength of the consolidated body. The samples 383-30 and 383-31 have too much cementing material, so that a large amount of phyllosilicate mineral is accumulated, the cost is increased, and the improvement of the strength of the flood prevention stone is not contributed. Therefore, in order to reduce the cost, the lower the dosage of the cementing material is, the better the cementing material dosage is under the condition of meeting the strength in engineering
In the step S3, mechanical and durability tests are carried out: a batch of flood prevention stones with different proportions and different specifications are prepared and put on the right bank of the yellow river at the garden opening of the yellow river, one part of the flood prevention stones are put on the big bank of the yellow river, the other part of the flood prevention stones are put in water to test the durability of the flood prevention stones, and the compressive strength test is carried out according to the test method standard of concrete physical and mechanical properties (GB/T50081-2019).
In the step S3, the anti-freezing performance experiment: the anti-freezing test is carried out according to the standard of test methods for long-term performance and durability of common concrete (GB/T50082-2009) slow freezing method, a cube with the size of a test piece of 100mm multiplied by 100mm is adopted, an automatic freezing and thawing equipment is adopted to freeze a freezing and thawing test box during the freezing period, and the temperature of the air in the freezing and thawing test box is kept in the range of (-20 to-18) DEG C; the water temperature of the concrete test piece soaked in the freeze-thaw test box is kept within the range of (18-20) DEG C during the thawing period; the temperature of each point in the freezing-thawing test box is far from exceeding 2 ℃ when the freezing-thawing test box is fully loaded.
In the step S3, sulfate erosion resistance is tested: the sulfate corrosion resistance test is carried out according to the standard of test methods for long-term performance and durability of common concrete (GB/T50082-2009), the test piece size is a cube of 100mm multiplied by 100mm, and each group is 3 blocks. And (3) in a dry-wet alternate environment, testing the sulfate corrosion resistance of the concrete according to the maximum dry-wet cycle number.
And in the step S3, testing the influence of mud content: the influence of different mud contents on the compressive strength of a cement consolidation body and a consolidating agent consolidation body is tested by adding 10 to 50 percent of the mud component with the mass less than 0.08 mm.
In this example: in the step S3, outdoor exposure test: outdoor exposure tests are carried out on the dike venture of the yellow river garden, and the exposure tests are divided into natural exposure tests and underwater exposure tests. And preparing a cubic test piece of 200mm to 200mm according to the mixing amount of 20%, 30% and 40% of the test sample, curing for 28 days, and placing the test sample on a site.
By testing the change rule of physical and mechanical properties and durability of the consolidation body with different doping amounts of the consolidation agent (20-40%) and the influence of different mud contents on the strength, the test results show that the doping amount of 20-40% 28d has the strength of 19.8-29.6MPa, the freezing resistance grade of F35, the permeation resistance grade of W6, the sulfate erosion resistance grade of KS30 and the mud content of increased from 10% to 50%, the strength loss rate of the consolidation body of 28d is 4.8-12.1%, and all the properties meet the set target, so that the consolidation agent can be used for producing flood control stones, taigu bricks and light building blocks.
Through gelled products and scanning electron microscope analysis, a mechanism of the slag-based gelling material for consolidating the yellow river argillaceous fine sand is disclosed, the slag-based gelling material has a volcanic ash effect, a micro-aggregate effect and a micro-crystal nucleus effect, generates C-S-H gel under the action of an exciting agent, can perform a secondary hydration reaction with a hydration product Ca (0H) 2 of cement, promotes the cement to be further hydrated to generate more C-S-H gel, generates some ettringite crystals at the same time, and well consolidates the argillaceous fine sand.
Tests and researches show that a consolidation body formed by the slag-based cementing material and the argillaceous powder fine sand has good performances of compression resistance, frost resistance, seepage resistance, sulfate corrosion resistance and the like, and can meet the design requirements of flood prevention and stone preparation in engineering through field exposure tests. The shape and size of the flood prevention stone can be prepared into a mould according to needs, the argillaceous silty sand and the cementing material are added with water and stirred to be poured, and the needed flood prevention stones with different specifications are obtained after demoulding, which is obviously superior to stone materials obtained by mountain-opening stone blasting. The muddy fine sand in the river can be stirred with the cementing material to complete the preparation of the flood prevention stones on site, so that a large amount of transportation cost can be saved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (8)
1. A fine sand consolidation agent is characterized in that: the preparation method comprises the following steps: the weight portions are: 50-70 parts of yellow pink fine sand, 30-45 parts of gel and 10-20 parts of tap water.
2. The fine sand consolidation agent as claimed in claim 1, wherein: the gel is any one of a mineral powder-based gel material, a fly ash-based gel material, a red mud-based gel material, a citric acid residue-based gel material, a bauxite tailing-based gel material and a water glass-based gel material.
3. The preparation method of the fine sand consolidation agent as claimed in claim 1, characterized in that: the method comprises the following steps:
s1, drying the air-dried yellow river fine silt, gel and gypsum powder according to the weight ratio of 7:2:1, adding tap water into a mixer, continuously mixing for 20min, continuously mixing for 40min, controlling the mixing temperature to be 50-70 ℃ in the mixing process, allowing some active silica and active alumina to participate in polymerization reaction in the mixing process, allowing the surface of sand grains to generate CSH and CAH gels under the action of an exciting agent under the high-temperature damp-heat condition, and finally coating the surface of the fine sand grains with the calcium silicate hydrate gel and the calcium aluminate hydrate gel to react to form a continuous integral structure;
s2, performance detection: testing the influences of the density, fineness, safety, water consumption for standard consistency, setting time, mechanics and durability, sulfate erosion resistance, freezing resistance and mud content of the consolidation agent according to a normal experimental mode;
s3, determining the optimal dosage of the gel: filling a standard beaker with the volume of 1000ml with dry argillaceous fine sand with the water content close to zero, slowly adding water into the beaker with the water content of 500g until the water level is higher than the sand surface, pouring out the water higher than the sand surface after the water level is stabilized, weighing, finally, adding 30%, 35%, 40% and 45% of gelling materials into the argillaceous fine sand, and testing the generated consolidation agent, wherein the total water absorbed by the argillaceous fine sand is the porosity of the argillaceous fine sand, and the porosity of the argillaceous fine sand is 35.4% through determination.
4. The preparation method of the fine sand consolidation agent as claimed in claim 3, characterized in that: in the step S3, mechanical and durability tests are carried out: a batch of flood prevention stones with different proportions and different specifications are prepared and put on the right bank of the yellow river at the garden opening of the yellow river, one part of the flood prevention stones are put on the big dike of the yellow river, the other part of the flood prevention stones are put in water to test the durability of the flood prevention stones, and the compression strength test is carried out according to the concrete physical and mechanical property test method standard (GB/T50081-2019).
5. The preparation method of the fine sand consolidation agent as claimed in claim 3, characterized in that: in the step S3, the anti-freezing performance experiment: the anti-freezing test is carried out according to the standard of test methods for long-term performance and durability of common concrete (GB/T50082-2009) slow freezing method, a cube with the size of a test piece of 100mm multiplied by 100mm is adopted, an automatic freezing and thawing equipment is adopted to freeze a freezing and thawing test box during the freezing period, and the temperature of the air in the freezing and thawing test box is kept in the range of (-20 to-18) DEG C; the water temperature of the concrete test piece soaked in the freeze-thaw test box is kept within the range of (18-20) DEG C during the thawing period; the temperature of each point in the freezing and thawing test box in full load is extremely different and should not exceed 2 ℃ for testing.
6. The method for preparing the fine sand consolidation agent according to claim 3, which is characterized by comprising the following steps: in the step S3, sulfate erosion resistance is tested: sulfate erosion resistance tests are carried out according to the standard of test methods for long-term performance and durability of common concrete (GB/T50082-2009), the test piece size is a cube of 100mm multiplied by 100mm, and each group is 3 blocks. And (3) the sulfate corrosion resistance of the concrete is measured according to the maximum dry-wet cycle number in a dry-wet alternate environment.
7. The preparation method of the fine sand consolidation agent as claimed in claim 3, characterized in that: and in the step S3, testing the influence of mud content: the influence of different mud contents on the compressive strength of a cement consolidation body and a consolidation agent consolidation body is tested by adding 10 to 50 percent of mud mass component with the mass less than 0.08 mm.
8. The method for preparing the fine sand consolidation agent according to claim 3, which is characterized by comprising the following steps: in the step S3, outdoor exposure test: outdoor exposure tests are carried out on the dike venture of the yellow river garden, and the exposure tests are divided into natural exposure tests and underwater exposure tests. And preparing a cubic test piece of 200mm to 200mm according to the mixing amount of 20%, 30% and 40% of the test sample, curing for 28 days, and placing the test sample on a site.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102557561A (en) * | 2011-11-23 | 2012-07-11 | 淄博乾耀固结材料有限公司 | High-performance sand-soil consolidation material, as well as preparation method and using method thereof |
| 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 |
| 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 |
| US20200231503A1 (en) * | 2019-01-23 | 2020-07-23 | United States Gypsum Company | Self-consolidating geopolymer compositions and methods for making same |
| CN113493328A (en) * | 2021-07-15 | 2021-10-12 | 黄河水利委员会黄河水利科学研究院 | Flood prevention backup stone material and preparation method thereof |
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2022
- 2022-06-28 CN CN202210752700.0A patent/CN115159941A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102557561A (en) * | 2011-11-23 | 2012-07-11 | 淄博乾耀固结材料有限公司 | High-performance sand-soil consolidation material, as well as preparation method and using method thereof |
| 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 |
| US20200231503A1 (en) * | 2019-01-23 | 2020-07-23 | United States Gypsum Company | Self-consolidating geopolymer compositions and methods for making same |
| 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 |
| CN113493328A (en) * | 2021-07-15 | 2021-10-12 | 黄河水利委员会黄河水利科学研究院 | Flood prevention backup stone material and preparation method thereof |
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Application publication date: 20221011 |