CN117776649A - Preparation method of rapid hardening curing agent suitable for silt soft soil - Google Patents
Preparation method of rapid hardening curing agent suitable for silt soft soil Download PDFInfo
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- CN117776649A CN117776649A CN202311807070.3A CN202311807070A CN117776649A CN 117776649 A CN117776649 A CN 117776649A CN 202311807070 A CN202311807070 A CN 202311807070A CN 117776649 A CN117776649 A CN 117776649A
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- stirring
- curing agent
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- soft soil
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- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 59
- 239000002689 soil Substances 0.000 title claims abstract description 59
- 238000002360 preparation method Methods 0.000 title claims abstract description 40
- 238000003756 stirring Methods 0.000 claims abstract description 87
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 60
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 31
- 235000010755 mineral Nutrition 0.000 claims abstract description 31
- 239000011707 mineral Substances 0.000 claims abstract description 31
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 24
- 239000000843 powder Substances 0.000 claims abstract description 24
- 239000000203 mixture Substances 0.000 claims abstract description 23
- 239000000292 calcium oxide Substances 0.000 claims abstract description 21
- 235000012255 calcium oxide Nutrition 0.000 claims abstract description 21
- 239000010881 fly ash Substances 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 21
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 19
- 239000010440 gypsum Substances 0.000 claims abstract description 19
- 239000004568 cement Substances 0.000 claims abstract description 18
- 150000004645 aluminates Chemical class 0.000 claims abstract description 16
- 230000008569 process Effects 0.000 claims abstract description 11
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 235000011121 sodium hydroxide Nutrition 0.000 claims abstract description 4
- 239000004115 Sodium Silicate Substances 0.000 claims description 12
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 12
- 239000010802 sludge Substances 0.000 claims description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 7
- 239000012528 membrane Substances 0.000 claims description 7
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 5
- 239000012190 activator Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 8
- 230000005284 excitation Effects 0.000 abstract description 8
- 239000005416 organic matter Substances 0.000 abstract description 4
- 230000009471 action Effects 0.000 abstract description 3
- 239000002253 acid Substances 0.000 abstract 1
- 239000000378 calcium silicate Substances 0.000 description 9
- 229910052918 calcium silicate Inorganic materials 0.000 description 9
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 9
- 239000002245 particle Substances 0.000 description 7
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 5
- 238000010276 construction Methods 0.000 description 5
- 239000003513 alkali Substances 0.000 description 4
- 230000036571 hydration Effects 0.000 description 4
- 238000006703 hydration reaction Methods 0.000 description 4
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 3
- 239000000920 calcium hydroxide Substances 0.000 description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 2
- 229910001424 calcium ion Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- -1 hydroxide ions Chemical class 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 239000003469 silicate cement Substances 0.000 description 2
- 229910001415 sodium ion Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 239000000404 calcium aluminium silicate Substances 0.000 description 1
- 235000012215 calcium aluminium silicate Nutrition 0.000 description 1
- WNCYAPRTYDMSFP-UHFFFAOYSA-N calcium aluminosilicate Chemical compound [Al+3].[Al+3].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O WNCYAPRTYDMSFP-UHFFFAOYSA-N 0.000 description 1
- 229940078583 calcium aluminosilicate Drugs 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 230000009974 thixotropic effect Effects 0.000 description 1
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- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to the technical field of silt soft soil, and discloses a preparation method of a rapid hardening curing agent suitable for silt soft soil, which comprises the following preparation steps of 1) preparing main materials, wherein the main materials comprise fly ash, gypsum, aluminate cement and mineral powder; preparing an exciting agent, wherein the exciting agent comprises quicklime, water glass and sodium hydroxide; the proportion of the main material and the excitant is (9.5-11) to (0.8-1.2) according to the mass ratio; 2) And placing the main material and the exciting agent into a stirrer for stirring and mixing to form a mixture, placing the mixture and the water body into the stirrer for stirring and mixing to form the curing agent, wherein the mass ratio of the mixture to the water body is (0.9-1.3) to (0.8-1.2). By the action of the exciting agent, the problems that the curing agent plays a role in the excitation process and the activity of the mineral admixture cannot be completely excited due to the fact that the organic matter content is high, the soil is weak acid and the pH value is low in the silt soft soil in coastal areas are solved.
Description
Technical Field
The invention relates to the technical field of silt soft soil, in particular to a preparation method of a rapid hardening curing agent suitable for silt soft soil.
Background
The silt geology has the characteristics of high water content, large porosity, large deformation, low strength, thixotropic property, rheological property and the like, is influenced by geological environment, and when engineering construction is carried out in the region, large-scale machinery cannot carry out next construction due to overlarge dead weight, so that the shallow earth surface silt soft soil foundation is required to be solidified before construction.
In the prior art, for sludge soft soil reinforcement, the most commonly used method at present adopts a common silicate cement curing agent to perform in-situ reinforcement on sludge, and has the advantages of low cost, convenient material acquisition, good stability of solidified sludge soil and the like, but the early strength of the solidified sludge soil is lower, and the engineering construction progress is influenced. The main reasons are as follows: on one hand, the common silicate cement curing agent is doped into soft soil for hydration slowly, the rate of generating hydrated calcium silicate gel and calcium hydroxide is slow, and the early strength of the cured soil is slowly increased; on the other hand, the existing curing agent is doped with mineral admixture, such as mineral powder, fly ash and the like, and needs a higher alkaline environment when the activity of the curing agent is excited by adopting an exciting agent, but the coastal sludge soft soil has high organic matter content, weak acidity of soil and low pH value, so that the pH value of the cured soil can be reduced, the cement curing agent is influenced in the excitation process, and the activity of the mineral admixture cannot be completely excited. Due to the reasons, early hydration products in the solidified soil are generated slowly, the strength is low, and the construction progress of engineering is affected.
Disclosure of Invention
The invention aims to provide a preparation method of a rapid hardening curing agent suitable for silt soft soil, and aims to solve the problem that in the prior art, the early strength of the solidified soil formed by in-situ reinforcement of silt soft soil in coastal areas by adopting the curing agent is low.
The invention is realized in such a way that the preparation method of the rapid hardening curing agent suitable for silt soft soil comprises the following preparation steps:
1) Preparing a main material, wherein the main material comprises fly ash, gypsum, aluminate cement and mineral powder; preparing an exciting agent, wherein the exciting agent comprises quicklime, water glass and sodium hydroxide; the proportion of the main material to the exciting agent is (9.5-11) according to the mass ratio: (0.8-1.2);
2) Placing the main material and the exciting agent into a stirrer for stirring and mixing to form a mixture, placing the mixture and the water body into the stirrer for stirring and mixing to form a curing agent, wherein the ratio of the mixture to the water body is (0.9-1.3) according to the mass ratio: (0.8-1.2).
Optionally, in the preparation step 1), the main material comprises 30-50 parts of mineral powder, 20-30 parts of fly ash, 15-20 parts of aluminate cement and 15-20 parts of desulfurized gypsum according to the proportion of the components.
Optionally, in the preparation step 1), the mineral powder is S95 mineral powder or S105 mineral powder, and the specific surface area of the mineral powder is more than 450kg/m 2 。
Optionally, in the preparation step 1), the fly ash is primary fly ash or superfine fly ash, and the specific surface area of the fly ash is greater than 400kg/m 2 。
Optionally, in the preparation step 1), the label of the aluminate cement is CA50, the aluminate cement contains alumina, and the content of the alumina is not less than 50%.
Optionally, in the preparation step 1), the gypsum is desulfurized gypsum, and the fineness of the gypsum is not less than 270 meshes.
Optionally, in the preparation step 1), the activator comprises 25-50 parts of quicklime, 25-50 parts of water glass and 25-50 parts of sodium hydroxide according to the proportion of the components.
Optionally, in the preparing step 1), the quicklime contains calcium oxide, and the water glass contains sodium silicate.
Optionally, in the preparing step 2), the stirrer is provided with a stirring cavity, a stirring shaft in the stirring cavity is provided with a plurality of transversely arranged blades, and the blades are arranged at intervals along the axial direction and the circumferential direction of the stirring shaft;
the top of the stirring cavity is provided with a plurality of feeding ports, the inside of the stirring shaft is hollow, a hollow cavity is formed, the hollow cavity extends along the axial direction of the stirring shaft, and the hollow cavity penetrates through the periphery of the stirring shaft to form a water outlet; the water outlet is provided with a one-way film sleeve, a one-way channel is arranged in the one-way film sleeve, the inner end of the one-way film sleeve is butted with the water outlet, and the outer end of the one-way film sleeve is flexibly arranged;
the water outlet is fixedly provided with a limiting ring, the limiting ring is arranged on the inner side of the water outlet along the extending direction of the hollow cavity, the unidirectional film sleeve is arranged on the outer side of the limiting ring, and the outer section of the limiting ring is fixedly butted on the side wall of the hollow cavity; when the water body is sprayed into the stirring cavity through the water outlet, the unidirectional membrane sleeve deforms outwards away from the water outlet, the unidirectional channel expands outwards, the water body is sprayed towards the stirring cavity through the unidirectional channel, and when the water body extrudes the unidirectional membrane sleeve from the stirring cavity, the limiting ring limits the unidirectional membrane sleeve to deform towards the hollow cavity;
in the preparation step 2), the stirring shaft rotates and stirs, the main material and the exciting agent respectively enter a stirring cavity through a plurality of feeding ports synchronously, and the stirring shaft is driven by a plurality of blades to stir and mix for a set time to form the mixture;
the stirring shaft is used for injecting water into the hollow cavity in the process of rotating and stirring, the water is sprayed into the stirring cavity through the plurality of water outlets and the unidirectional film sleeve, and the water and the mixture are stirred and mixed to form the curing agent.
Optionally, the inner ends of the blades are butted on the stirring shaft, the outer ends of the blades extend away from the stirring shaft to form an outer section, the outer section is provided with a plurality of flexible sheets, the flexible sheets are arranged at intervals, and elastic intervals are arranged between the adjacent flexible sheets;
elastic strips are arranged in the elastic intervals, and the elastic strips in the adjacent elastic intervals are arranged in a staggered manner along the length direction of the blade; in the preparation step 2), the stirring shaft rotates at a variable speed, the flexible strips on the blades synchronously rotate along with the stirring shaft, the rotation speed of the stirring shaft changes, the elastic strips elastically stretch, and the flexible strips synchronously swing in a reciprocating manner in the rotating process.
Compared with the prior art, the preparation method of the rapid hardening curing agent suitable for silt soft soil provided by the invention has the advantages that the main component of quicklime in the excitant is calcium oxide, and the quicklime reacts with water in soil to generate an alkaline environment, so that necessary conditions are provided for the hydration of mineral powder.
The sodium silicate in the excitant is mainly composed of sodium silicate, and is mixed with quicklime after being dissolved, sodium ions generated by the sodium silicate are combined with hydroxide ions in calcium hydroxide to generate a similar strong alkaline environment in the environment, so that the alkalinity of a solidified soil body is further enhanced, sodium silicate can be combined with calcium ions to generate hydrated calcium silicate gel, and the hydrated calcium silicate gel is a substance with gelatinization property, can effectively cement soil particles, and enhances the strength and stability of the solidified soil body. And secondly, the hydrated calcium silicate gel fills gaps among soil particles, so that the compactness and impermeability of the solidified soil are further improved.
The sodium hydroxide in the excitant plays a role in enhancing the pH value of the solidified soil and enhances the alkali excitation effect. Thus, the problems that the activity of the mineral admixture cannot be completely excited due to the influence of the curing agent on the action in the excitation process because of high organic matter content, weak acidity of soil and low pH value in the silt soft soil in coastal areas are overcome.
Drawings
FIG. 1 is a schematic flow chart of a preparation method of a rapid hardening curing agent suitable for silt soft soil;
FIG. 2 is a partial schematic view of a stir chamber provided by the present invention;
FIG. 3 is a schematic illustration of the attachment of a plurality of flexible sheets provided by the present invention;
fig. 4 is an enlarged schematic view of fig. 2 a provided in the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The implementation of the present invention will be described in detail below with reference to specific embodiments.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus terms describing the positional relationship in the drawings are merely illustrative and should not be construed as limitations of the present patent, and specific meanings of the terms described above may be understood by those skilled in the art according to specific circumstances.
Referring to fig. 1-4, a preferred embodiment of the present invention is provided.
The invention provides a preparation method of a rapid hardening curing agent suitable for silt soft soil, which comprises the following preparation steps:
1) Preparing main materials including fly ash, gypsum, aluminate cement and mineral powder; preparing an exciting agent, wherein the exciting agent comprises quicklime, water glass and sodium hydroxide; the proportion of the main material and the excitant is (9.5-11) according to the mass ratio: (0.8-1.2);
2) Placing the main material and the exciting agent into a stirrer 10 for stirring and mixing to form a mixture, placing the mixture and the water body into the stirrer 10 for stirring and mixing to form a curing agent, wherein the ratio of the mixture to the water body is (0.9-1.3) according to the mass ratio: (0.8-1.2).
According to the preparation method of the rapid hardening curing agent suitable for silt soft soil, which is provided by the invention, the main component of quicklime in the excitant is calcium oxide, and the quicklime reacts with water in soil to generate an alkaline environment, so that a necessary condition is provided for the hydration of mineral powder.
The sodium silicate in the excitant is mainly composed of sodium silicate, and is mixed with quicklime after being dissolved, sodium ions generated by the sodium silicate are combined with hydroxide ions in calcium hydroxide to generate a similar strong alkaline environment in the environment, so that the alkalinity of a solidified soil body is further enhanced, sodium silicate can be combined with calcium ions to generate hydrated calcium silicate gel, and the hydrated calcium silicate gel is a substance with gelatinization property, can effectively cement soil particles, and enhances the strength and stability of the solidified soil body. And secondly, the hydrated calcium silicate gel fills gaps among soil particles, so that the compactness and impermeability of the solidified soil are further improved.
The sodium hydroxide in the excitant plays a role in enhancing the pH value of the solidified soil and enhances the alkali excitation effect. Thus, the problems that the activity of the mineral admixture cannot be completely excited due to the influence of the curing agent on the action in the excitation process because of high organic matter content, weak acidity of soil and low pH value in the silt soft soil in coastal areas are overcome.
The aluminate cement is marked as CA50, wherein the content of alumina is not lower than 50%, the 1d compressive strength is not lower than 50MPa, and the 3d strength is not lower than 60MPa; the gypsum is desulfurized gypsum with fineness not lower than 270 meshes.
The mineral powder is a high-activity high-quality mineral admixture obtained by water quenching, granulating, drying and grinding a melt which is obtained by iron works and takes calcium aluminosilicate as a main component when pig iron is smelted in a blast furnace. The mineral powder can form hydrated calcium silicate and hydrated calcium aluminate after alkali excitation, thereby playing a role in solidifying soil.
Fly ash is fine ash discharged from the blast furnace flue gas of a coal-fired power plant. The composite material contains a large amount of amorphous active silicon dioxide and active aluminum oxide, and can generate hydrated calcium silicate and hydrated calcium aluminate after alkali excitation, so that soil particles can be cemented, and the strength of a solidified soil body is enhanced.
The main mineral components of aluminate cement include calcium aluminate and dicalcium aluminate, which belong to hydraulic cementing materials, and are hydrated after being mixed with water to form calcium aluminate hydrate and aluminum hydroxide. At the moment, calcium aluminate hydrate and the gypsum which is the other component in the curing agent further react to generate ettringite, so that gaps among soil particles can be greatly filled; aluminum hydroxide has gelling property and can glue soil particles.
Specifically, in the preparation step 1), the main materials comprise 30-50 parts of mineral powder, 20-30 parts of fly ash, 15-20 parts of aluminate cement and 15-20 parts of desulfurized gypsum according to the proportion of the components.
Specifically, in the preparation step 1), the mineral powder is S95 mineral powder or S105 mineral powder, and the specific surface area of the mineral powder is more than 450kg/m 2 。
Specifically, in the preparation step 1), the fly ash is primary fly ash or superfine fly ash, and the specific surface area of the fly ash is more than 400kg/m 2 。
Specifically, in the preparation step 1), the label of the aluminate cement is CA50, the aluminate cement contains alumina, and the content of the alumina is not less than 50%. And the 1d compressive strength is not lower than 50MPa, and the 3d strength is not lower than 60MPa.
Specifically, in the preparation step 1), the gypsum is desulfurized gypsum, and the fineness of the gypsum is not less than 270 meshes.
Specifically, in the preparation step 1), the excitant comprises 25-50 parts of quicklime, 25-50 parts of water glass and 25-50 parts of sodium hydroxide according to the proportion of the components.
Specifically, in the preparation step 1), the quicklime contains calcium oxide, and the water glass contains sodium silicate.
In the preparation step 2), the stirrer 10 is provided with a stirring cavity 11, a stirring shaft 100 in the stirring cavity 11, and a plurality of transversely arranged blades are arranged on the stirring shaft 100 and are arranged at intervals along the axial direction and the circumferential direction of the stirring shaft 100;
the top of the stirring cavity 11 is provided with a plurality of feeding holes, the inside of the stirring shaft 100 is hollow, a hollow cavity 101 is formed, the hollow cavity 101 extends along the axial direction of the stirring shaft 100, the hollow cavity 101 penetrates through the periphery of the stirring shaft 100, and a water outlet is formed; the water outlet is provided with a one-way film sleeve 110, a one-way channel 111 is arranged in the one-way film sleeve 110, the inner end of the one-way film sleeve 110 is butted with the water outlet, and the outer end of the one-way film sleeve 110 is flexibly arranged;
a limiting ring 120 is fixedly arranged on the water outlet, the limiting ring 120 is arranged on the inner side of the water outlet along the extending direction of the hollow cavity 101, the unidirectional film sleeve 110 is arranged on the outer side of the limiting ring 120, and the outer section of the limiting ring 120 is fixedly butted on the side wall of the hollow cavity 101; when the water body is sprayed into the stirring cavity 11 through the water outlet, the unidirectional film sleeve 110 deforms outwards away from the water outlet, the unidirectional channel 111 expands outwards, the water body is sprayed towards the stirring cavity 11 through the unidirectional channel 111, and when the water body extrudes the unidirectional film sleeve 110 from the stirring cavity 11, the limiting ring 120 limits the unidirectional film sleeve 110 to deform towards the hollow cavity 101;
in the preparation step 2), the stirring shaft 100 rotates and stirs, the main material and the exciting agent respectively enter the stirring cavity 11 through a plurality of feeding ports synchronously, and the stirring shaft 100 is driven by a plurality of blades to stir and mix for a set time to form a mixture;
in the process of rotating and stirring, the stirring shaft 100 injects water into the hollow cavity 101, the water is sprayed into the stirring cavity 11 through the plurality of water outlets and the unidirectional film sleeve 110, and the water and the mixture are stirred and mixed to form the curing agent. In this way, the main material and the exciting agent are stirred to be uniformly mixed to form a mixture, water is sprayed towards the stirring cavity 11 through the water outlets, the water sprayed from the water outlets and the mixture are uniformly mixed to form a curing agent, the curing agent is thoroughly stirred and uniformly mixed, and the unidirectional inflow of the water body is realized through the functions of the unidirectional membrane sleeve 110 and the limiting ring 120.
The inner ends of the blades are butted on the stirring shaft 100, the outer ends of the blades extend away from the stirring shaft 100 to form an outer section, the outer section is provided with a plurality of flexible sheets 200, the flexible sheets 200 are distributed at intervals, and elastic intervals are arranged between the adjacent flexible sheets 200;
elastic strips 210 are arranged in the elastic intervals, and the elastic strips 210 in the adjacent elastic intervals are arranged in a staggered manner along the length direction of the blade; in the preparation step 2), the stirring shaft 100 rotates at a variable speed, the plurality of flexible strips on the blades synchronously rotate along with the stirring shaft 100, and the plurality of flexible strips 200 synchronously reciprocate in the rotating process along with the rotation speed change of the stirring shaft 100 and the elastic expansion and contraction of the elastic strips 210. In this way, through the connection relationship between the plurality of flexible sheets 200 and the elastic strips 210, in the process of rotating the stirring shaft 100, the flexible sheets 200 are subjected to resistance, the elastic strips 210 are elastically contracted, and the resistance is changed along with the change of the rotating speed, so that the elastic strips 210 are repeatedly deformed for a plurality of times, the flexible sheets 200 are repeatedly swung, and stirring uniformity is promoted.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (10)
1. The preparation method of the rapid hardening curing agent suitable for the silt soft soil is characterized by comprising the following preparation steps:
1) Preparing a main material, wherein the main material comprises fly ash, gypsum, aluminate cement and mineral powder; preparing an exciting agent, wherein the exciting agent comprises quicklime, water glass and sodium hydroxide; the proportion of the main material to the exciting agent is (9.5-11) according to the mass ratio: (0.8-1.2);
2) Placing the main material and the exciting agent into a stirrer for stirring and mixing to form a mixture, placing the mixture and the water body into the stirrer for stirring and mixing to form a curing agent, wherein the ratio of the mixture to the water body is (0.9-1.3) according to the mass ratio: (0.8-1.2).
2. The method for preparing a rapid hardening curing agent for silt soft soil according to claim 1, wherein in the preparation step 1), the main materials comprise 30-50 parts of mineral powder, 20-30 parts of fly ash, 15-20 parts of aluminate cement and 15-20 parts of desulfurized gypsum according to the proportion of components.
3. The method for preparing a rapid hardening curing agent for silt soft soil according to claim 1, wherein the following steps are performedIn the preparation step 1), the mineral powder is S95 mineral powder or S105 mineral powder, and the specific surface area of the mineral powder is more than 450kg/m 2 。
4. The method for preparing a rapid hardening curing agent for silt soft soil according to claim 1, wherein in the preparation step 1), the fly ash is primary fly ash or superfine fly ash, and the specific surface area of the fly ash is more than 400kg/m 2 。
5. The method for preparing a rapid hardening curing agent for sludge soft soil according to claim 1, wherein in the step 1), the label of the aluminate cement is CA50, the aluminate cement contains alumina, and the content of the alumina is not less than 50%.
6. The method for preparing a rapid hardening curing agent for silt soft soil according to claim 1, wherein in the preparation step 1), the gypsum is desulfurized gypsum, and the fineness of the gypsum is not lower than 270 meshes.
7. The method for preparing a rapid hardening curing agent for sludge soft soil according to claim 1, wherein in the preparation step 1), the activator comprises 25-50 parts of quicklime, 25-50 parts of sodium silicate and 25-50 parts of sodium hydroxide according to the component proportion.
8. The method for preparing a rapid hardening curing agent for sludge soft soil according to claim 1, wherein in the preparing step 1), the quicklime contains calcium oxide and the water glass contains sodium silicate.
9. The method for preparing a rapid hardening curing agent suitable for silt soft soil according to any one of claims 1 to 8, wherein in the preparing step 2), the stirring machine is provided with a stirring cavity, a stirring shaft is arranged in the stirring cavity, a plurality of blades which are transversely arranged are arranged on the stirring shaft, and a plurality of blades are arranged at intervals along the axial direction and the circumferential direction of the stirring shaft;
the top of the stirring cavity is provided with a plurality of feeding ports, the inside of the stirring shaft is hollow, a hollow cavity is formed, the hollow cavity extends along the axial direction of the stirring shaft, and the hollow cavity penetrates through the periphery of the stirring shaft to form a water outlet; the water outlet is provided with a one-way film sleeve, a one-way channel is arranged in the one-way film sleeve, the inner end of the one-way film sleeve is butted with the water outlet, and the outer end of the one-way film sleeve is flexibly arranged;
the water outlet is fixedly provided with a limiting ring, the limiting ring is arranged on the inner side of the water outlet along the extending direction of the hollow cavity, the unidirectional film sleeve is arranged on the outer side of the limiting ring, and the outer section of the limiting ring is fixedly butted on the side wall of the hollow cavity; when the water body is sprayed into the stirring cavity through the water outlet, the unidirectional membrane sleeve deforms outwards away from the water outlet, the unidirectional channel expands outwards, the water body is sprayed towards the stirring cavity through the unidirectional channel, and when the water body extrudes the unidirectional membrane sleeve from the stirring cavity, the limiting ring limits the unidirectional membrane sleeve to deform towards the hollow cavity;
in the preparation step 2), the stirring shaft rotates and stirs, the main material and the exciting agent respectively enter a stirring cavity through a plurality of feeding ports synchronously, and the stirring shaft is driven by a plurality of blades to stir and mix for a set time to form the mixture;
the stirring shaft is used for injecting water into the hollow cavity in the process of rotating and stirring, the water is sprayed into the stirring cavity through the plurality of water outlets and the unidirectional film sleeve, and the water and the mixture are stirred and mixed to form the curing agent.
10. The method for preparing a rapid hardening curing agent suitable for silt soft soil according to claim 9, wherein the inner ends of the blades are butted on a stirring shaft, the outer ends of the blades extend away from the stirring shaft to form an outer section, the outer section is provided with a plurality of flexible sheets, the flexible sheets are arranged at intervals, and elastic intervals are arranged between the adjacent flexible sheets;
elastic strips are arranged in the elastic intervals, and the elastic strips in the adjacent elastic intervals are arranged in a staggered manner along the length direction of the blade; in the preparation step 2), the stirring shaft rotates at a variable speed, the flexible strips on the blades synchronously rotate along with the stirring shaft, the rotation speed of the stirring shaft changes, the elastic strips elastically stretch, and the flexible strips synchronously swing in a reciprocating manner in the rotating process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311807070.3A CN117776649A (en) | 2023-12-25 | 2023-12-25 | Preparation method of rapid hardening curing agent suitable for silt soft soil |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311807070.3A CN117776649A (en) | 2023-12-25 | 2023-12-25 | Preparation method of rapid hardening curing agent suitable for silt soft soil |
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