Tidal flat sludge solidifying agent and its preparation method

Abstract

The present invention discloses a curing agent for tidal flat silt and a preparation method thereof, relating to the technical field of tidal flat treatment. The curing agent for tidal flat silt disclosed by the present invention comprises the following raw materials in parts by weight: 6-12 parts by weight of cement, 0.02-0.1 part by weight of triethanolamine, 1-2.5 parts by weight of water reducer, 6-12 parts by weight of fly ash, and 3-6 parts by weight of regulator. The preparation method of the regulator prepared in this application comprises the following steps: A1: preparing porous silica as component one; A2: modifying the porous silica with KH-550 to obtain component two; A3: grafting and modifying component two with pyromellitic dianhydride to obtain component three; A4: reacting component three with triethylenetetramine to obtain component four; A5: reacting component four with benzyl chloride to obtain the regulator. The regulator prepared in this application is added to the curing agent for tidal flat silt, and the obtained curing agent has a good curing effect when applied to silt curing, and the cured soil has excellent mechanical properties and excellent salt erosion resistance when used in seawater.

Description

Technical Field

[0001] The present invention relates to the technical field of tidal flat treatment, and specifically relates to a tidal flat sludge solidifying agent and a preparation method thereof. Background Art

[0002] A tidal flat refers to a beach formed by silt or sandy coast in coastal areas. According to the investigation and statistics of relevant departments, the current tidal flat area in China is about more than 21,700 square kilometers. Rational and orderly development and utilization of tidal flat resources has important strategic significance. However, the bearing capacity of tidal flat sludge is low and its permeability is small. Under the action of external loads, settlement and uneven settlement are likely to occur, and it is not suitable to be directly used as a building foundation. When engineering technicians carry out infrastructure construction on a tidal flat foundation, the tidal flat sludge cannot meet the bearing capacity and deformation requirements, which poses a great obstacle to engineering construction. Therefore, before carrying out engineering construction, the tidal flat sludge must be treated. After solidification treatment, the engineering properties of the tidal flat sludge have been greatly changed. Physical dewatering, heating and chemical solidification are the main methods for sludge solidification treatment. When the amount of sludge is small and the treatment effect is relatively high, physical dewatering or heat sintering methods can be selected. Chemical solidification is to incorporate a solidifying material into the sludge to make it react chemically with the sludge to form a sludge solidified soil, thereby increasing its bearing capacity, stability and anti-deformation ability, and reducing its permeability. It is suitable for treating large areas of sludge zones. Then, the formed plasticized solidified filler is pumped to the reclamation area, and after it is solidified, a construction site with a certain strength is formed for subsequent development and utilization.

[0003] From the physical and engineering properties of the sludge, it is close to the properties of cohesive soil, but at the same time, it has the characteristics of high water content, low strength, high humus and salt content. The chemical consolidation method of incorporating a solidifying agent is used to make it have a certain self-hardening ability, improve the strength or bearing capacity, and thus form a geotechnical material with general or above equivalent engineering properties. However, the pore solution of sludge generated from offshore and marine construction usually contains a large amount of soluble salts. The change of salt concentration in the solution will have an obvious impact on the physical and mechanical properties of the sludge, and also have an adverse impact on the strength and compressibility of the sludge solidified soil. Research shows that during the solidification and cementation process of the existing solidified soil with cement as the main solidifying agent, the strength of the solidified soil gradually weakens after being eroded by salt. Summary of the Invention

[0004] The purpose of the present invention is to provide a tidal flat sludge solidifying agent and a preparation method thereof to solve the following technical problems:

[0005] During the solidification and cementation process of the existing solidified soil with cement as the main solidifying agent, the strength of the solidified soil gradually weakens after being eroded by salt.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] Tidal flat silt solidifying agent, comprising raw materials in the following weight parts: 6-12 parts by weight of cement, 0.02-0.1 part by weight of triethanolamine, 1-2.5 parts by weight of water reducing agent, 6-12 parts by weight of fly ash, and 3-6 parts by weight of regulator.

[0008] In this application, a water reducing agent is added to the solidifying agent as a type of surfactant, which reduces the surface energy between cement particles and water molecules, improves the agglomeration and uneven distribution between cement particles, increases the specific surface area of cement particles, enlarges the space where cement particles can undergo chemical reactions, and ultimately increases the degree of the hydration reaction of cement.

[0009] In this application, triethanolamine is added to the solidifying agent to increase the initial mechanical properties of concrete and improve the activity of the products generated during the hydration of cement, increase the pressure in the reaction environment, enhance the dispersion between reactants, and thus increase the reaction degree of the formation of ettringite between tricalcium aluminate and CaSO4·nH2O.

[0010] In this application, fly ash is added to the solidifying agent. By utilizing a large amount of substances such as silicon dioxide, alumina, and calcium oxide contained in fly ash, the hardening reaction occurs between silicon dioxide and alumina, and the products contain calcium silicate hydrate and calcium aluminate hydrate, thereby improving the bearing capacity of the solidified soil.

[0011] As a further scheme of the present invention: the cement is P.O 42.5 ordinary portland cement.

[0012] As a further scheme of the present invention: the water reducing agent is polycarboxylate superplasticizer, lignosulfonate water reducing agent or amino superplasticizer.

[0013] As a further scheme of the present invention: the preparation method of the regulator includes the following steps:

[0014] A1: Add absolute ethanol, deionized water, and 25-30 wt% ammonia water into a reaction kettle and disperse evenly. Then continue to add cetyltrimethylammonium bromide and 1,3,5-triisopropylbenzene, heat up to 50-60 °C, disperse evenly, add tetraethyl orthosilicate, keep warm for 1-3 h, filter, dry, and calcine to obtain component one;

[0015] A2: Add component one, absolute ethanol, and KH-550 into a reaction kettle, heat up to 60-80 °C, keep warm for 1-3 h, carry out suction filtration, washing, and drying to obtain component two;

[0016] A3: Add component two, pyromellitic dianhydride, and N,N-dimethylformamide into a reaction flask, heat up to 40-50 °C, keep warm for 3-6 h, filter, wash, and dry to obtain component three;

[0017] A4: In a nitrogen atmosphere, add component three, triethylenetetramine, and xylene into a reaction flask, heat up to 120 - 130 °C, keep warm for 1 - 3 h, continue to heat up to 170 - 180 °C, keep warm for 3 - 6 h, then distill off xylene under reduced pressure, wash and dry to obtain component four;

[0018] A5: Add component four and benzyl chloride into a reaction flask, heat up to 100 - 130 °C, keep warm for 3 - 6 h to obtain the regulator.

[0019] As a further aspect of the present invention: In A1, the mass ratio of absolute ethanol, deionized water, 25 - 30 wt% ammonia water, cetyltrimethylammonium bromide, 1,3,5 - triisopropylbenzene, and tetraethyl orthosilicate is 10 - 20:50 - 100:1 - 5:2 - 3:0.5 - 1.5:5 - 10.

[0020] As a further aspect of the present invention: The calcination in A1 is specifically: Heat from room temperature to 600 °C at a heating rate of 2 - 5 °C / min and calcine for 10 h.

[0021] As a further aspect of the present invention: In A2, the mass ratio of component one, absolute ethanol, and KH - 550 is 10:200 - 300:5 - 10.

[0022] As a further aspect of the present invention: In A3, the addition ratio of component two, pyromellitic dianhydride, and N,N - dimethylformamide is 1 g:2 - 5 g:50 - 100 mL.

[0023] As a further aspect of the present invention: In A4, the mass ratio of component three, triethylenetetramine, and xylene is 1:1 - 5:0.2 - 0.5.

[0024] As a further aspect of the present invention: In A5, the mass ratio of component four and benzyl chloride is 1:0.5 - 1.

[0025] For the preparation method of the beach sludge solidifying agent, weigh each component raw material according to the weight parts of the raw material components, and successively mix cement, triethanolamine, water reducer, fly ash, and regulator to obtain the beach sludge solidifying agent.

[0026] The beneficial effects of the present invention:

[0027] (1) The regulator prepared in this application is added to the curing agent. The regulator fills the small pores in the interfacial transition zone of the cement-based composite material, making the cementitious composite material denser. The core of the regulator is porous silica, which has a smaller particle size, higher reactivity, a more rapid pozzolanic reaction, and a more significant filling effect. When added to the curing agent, it improves the acid resistance of the material. The regulator has a higher driving force than the cement matrix, thus shortening the time to reach adsorption equilibrium, enhancing the binding ability of salt ions such as chloride ions, and reducing the content of free salt ions in the pore solution of the solidified soil. Moreover, when the regulator is added to the curing agent, it increases the tortuosity and denseness of the capillary pores of the material, further blocking the transport of water and salt, and achieving the performance of anti-corrosion and anti-seepage. In this application, the groups carried by the regulator are basic groups, which can ionize OH- and positively charged macromolecular groups in aqueous solution and have the property of adsorbing anions. Erosive ions penetrate the organic matter on the surface of the regulator and diffuse to the surface of the regulator core through molecular diffusion and convective diffusion. The ions enter the particle interior through the pores of the regulator core and continue to diffuse to the adsorption sites. At this time, ion exchange occurs between the ions at the adsorption sites and the ions on the functional groups, and the displaced ions leave the adsorption sites, realizing the removal of salt ions in the target solution.

[0028] (2) The porous structure inherent in the regulator prepared in this application increases the content of non-evaporable water in the cement slurry, reduces the free water-cement ratio, improves the density of the cement hardened body, has a stronger promoting effect on cement hydration, can refine the pore structure, and reduce the number of harmful pores with a size of 20 - 100 nm. The hydration rate of the regulator is much higher than that of ordinary Portland cement clinker, which improves the microstructure of the cement hardened body, refines the pore structure, increases the compressive and flexural strengths of the specimens. Incorporating the regulator into the curing agent is very beneficial for improving the rheological properties and compressive strength after hardening of the cement paste, accelerating the heat release rate in the initial stage of hydration, and shortening the setting time.

[0029] (3) The curing agent prepared in this application undergoes a series of chemical reactions such as hydration reaction, ion exchange reaction, pozzolanic reaction, and carbonation reaction with clay minerals, generating a gel-like substance with a network structure; the adhesiveness between the solidified soil particles is greatly enhanced, the permeability is greatly reduced, the expansibility of the soil is reduced, the soil pores are filled, the shear strength and bearing capacity of the soil are improved, the workability is improved, and the obtained solidified soil has a better resistance to sulfates. Detailed implementation mode

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0031] Example 1

[0032] The preparation method of the regulator comprises the following steps:

[0033] A1: Add 10 g of absolute ethanol, 50 mL of deionized water, and 1 g of 25 wt% ammonia water into a reaction kettle and disperse evenly. Then continue to add 2 g of cetyltrimethylammonium bromide and 0.5 g of 1,3,5-triisopropylbenzene, heat up to 50 °C, disperse evenly, add 5 g of tetraethyl orthosilicate, keep warm for 1 h, filter, dry, and heat from room temperature to 600 °C at a heating rate of 2 °C / min, and calcine for 10 h to obtain Component 1;

[0034] A2: Add 10 g of Component 1, 200 g of absolute ethanol, and 5 g of KH-550 into a reaction kettle, heat up to 60 °C, keep warm for 1 h, carry out suction filtration, washing, and drying to obtain Component 2;

[0035] A3: Add 10 g of Component 2, 20 g of pyromellitic dianhydride, and 500 mL of N,N-dimethylformamide into a reaction flask, heat up to 40 °C, keep warm for 3 h, filter, wash, and dry to obtain Component 3;

[0036] A4: In a nitrogen atmosphere, add 10 g of Component 3, 10 g of triethylenetetramine, and 2 g of xylene into a reaction flask, heat up to 120 °C, keep warm for 1 h, continue to heat up to 170 °C, keep warm for 3 h, then distill off xylene under reduced pressure, wash, and dry to obtain Component 4;

[0037] A5: Add 10 g of Component 4 and 5 g of benzyl chloride into a reaction flask, heat up to 100 °C, keep warm for 3 h to obtain the regulator.

[0038] Example 2

[0039] The preparation method of the regulator comprises the following steps:

[0040] A1: Add 15 g of absolute ethanol, 80 mL of deionized water, and 3 g of 25 wt% ammonia water into a reaction kettle and disperse evenly. Then continue to add 2 g of cetyltrimethylammonium bromide and 1 g of 1,3,5-triisopropylbenzene, heat up to 55 °C, disperse evenly, add 7 g of tetraethyl orthosilicate, keep warm for 2 h, filter, dry, and heat from room temperature to 600 °C at a heating rate of 2 °C / min, and calcine for 10 h to obtain Component 1;

[0041] A2: Add 10 g of Component 1, 250 g of absolute ethanol, and 7 g of KH-550 into a reaction kettle, heat up to 70 °C, keep warm for 2 h, carry out suction filtration, washing, and drying to obtain Component 2;

[0042] A3: Add 10 g of Component Two, 40 g of pyromellitic dianhydride, and 700 mL of N,N-dimethylformamide into a reaction flask, heat up to 45 °C, keep the temperature for 4 h, filter, wash, and dry to obtain Component Three;

[0043] A4: In a nitrogen atmosphere, add 10 g of Component Three, 40 g of triethylenetetramine, and 4 g of xylene into a reaction flask, heat up to 120 °C, keep the temperature for 2 h, continue to heat up to 170 °C, keep the temperature for 3 h, then distill off xylene under reduced pressure, wash, and dry to obtain Component Four;

[0044] A5: Add 10 g of Component Four and 6 g of benzyl chloride into a reaction flask, heat up to 120 °C, keep the temperature for 3 h to obtain the regulator.

[0045] Example 3

[0046] The preparation method of the regulator comprises the following steps:

[0047] A1: Add 20 g of absolute ethanol, 100 mL of deionized water, and 5 g of 25 wt% ammonia water into a reaction kettle and disperse evenly. Then continue to add 3 g of cetyltrimethylammonium bromide and 1.5 g of 1,3,5-triisopropylbenzene, heat up to 60 °C, disperse evenly, add 10 g of tetraethyl orthosilicate, keep the temperature for 3 h, filter, dry, and heat from room temperature to 600 °C at a heating rate of 2 °C / min, and calcine for 10 h to obtain Component One;

[0048] A2: Add 10 g of Component One, 300 g of absolute ethanol, and 10 g of KH-550 into a reaction kettle, heat up to 80 °C, keep the temperature for 3 h, filter with suction, wash, and dry to obtain Component Two;

[0049] A3: Add 10 g of Component Two, 50 g of pyromellitic dianhydride, and 1000 mL of N,N-dimethylformamide into a reaction flask, heat up to 50 °C, keep the temperature for 6 h, filter, wash, and dry to obtain Component Three;

[0050] A4: In a nitrogen atmosphere, add 10 g of Component Three, 50 g of triethylenetetramine, and 5 g of xylene into a reaction flask, heat up to 130 °C, keep the temperature for 3 h, continue to heat up to 180 °C, keep the temperature for 6 h, then distill off xylene under reduced pressure, wash, and dry to obtain Component Four;

[0051] A5: Add 10 g of Component Four and 10 g of benzyl chloride into a reaction flask, heat up to 130 °C, keep the temperature for 6 h to obtain the regulator.

[0052] Example 4

[0053] The preparation method of the coastal mud solidifying agent comprises the following steps:

[0054] (1) Weigh each component of the raw materials according to the weight parts of the raw material components: The raw materials include the following weight parts: 10 parts by weight of P.O42.5 ordinary Portland cement, 0.05 part by weight of triethanolamine, 1 part by weight of amino superplasticizer, 8 parts by weight of fly ash, and 3 parts by weight of the regulator prepared in Example 1.

[0055] (2) Mix the cement, triethanolamine, superplasticizer, fly ash, and regulator in sequence to obtain the beach sludge solidifying agent.

[0056] Example 5

[0057] The preparation method of the beach sludge solidifying agent includes the following steps:

[0058] (1) Weigh each component of the raw materials according to the weight parts of the raw material components: The raw materials include the following weight parts: 10 parts by weight of P.O42.5 ordinary Portland cement, 0.05 part by weight of triethanolamine, 1 part by weight of amino superplasticizer, 8 parts by weight of fly ash, and 3 parts by weight of the regulator prepared in Example 2.

[0059] (2) Mix the cement, triethanolamine, superplasticizer, fly ash, and regulator in sequence to obtain the beach sludge solidifying agent.

[0060] Example 6

[0061] The preparation method of the beach sludge solidifying agent includes the following steps:

[0062] (1) Weigh each component of the raw materials according to the weight parts of the raw material components: The raw materials include the following weight parts: 10 parts by weight of P.O42.5 ordinary Portland cement, 0.05 part by weight of triethanolamine, 1 part by weight of amino superplasticizer, 8 parts by weight of fly ash, and 3 parts by weight of the regulator prepared in Example 3.

[0063] (2) Mix the cement, triethanolamine, superplasticizer, fly ash, and regulator in sequence to obtain the beach sludge solidifying agent.

[0064] Comparative Example 1

[0065] The preparation method of the regulator includes the following steps:

[0066] Add 10 g of absolute ethanol, 50 mL of deionized water, and 1 g of 25 wt% ammonia water into the reaction kettle and disperse evenly. Then continue to add 2 g of cetyltrimethylammonium bromide and 0.5 g of 1,3,5-triisopropylbenzene, heat up to 50 °C, disperse evenly, add 5 g of tetraethyl orthosilicate, keep warm for 1 h, filter, dry, and calcine at a heating rate of 2 °C / min from room temperature to 600 °C for 10 h to obtain the regulator.

[0067] Comparative Example 2

[0068] The preparation method of the regulator includes the following steps:

[0069] A1: Add 10 g of absolute ethanol, 50 mL of deionized water, and 1 g of 25 wt% ammonia water into a reaction kettle and disperse evenly. Then continue to add 2 g of cetyltrimethylammonium bromide and 0.5 g of 1,3,5-triisopropylbenzene, heat up to 50 °C, disperse evenly, add 5 g of tetraethyl orthosilicate, keep warm for 1 h, filter, dry, and heat from room temperature to 600 °C at a heating rate of 2 °C / min, and calcine for 10 h to obtain Component 1;

[0070] A2: Add 10 g of Component 1, 200 g of absolute ethanol, and 5 g of KH-550 into a reaction kettle, heat up to 60 °C, keep warm for 1 h, carry out suction filtration, washing, and drying to obtain a regulator.

[0071] Comparative Example 3

[0072] The preparation method of the regulator comprises the following steps:

[0073] A1: Add 10 g of absolute ethanol, 50 mL of deionized water, and 1 g of 25 wt% ammonia water into a reaction kettle and disperse evenly. Then continue to add 2 g of cetyltrimethylammonium bromide and 0.5 g of 1,3,5-triisopropylbenzene, heat up to 50 °C, disperse evenly, add 5 g of tetraethyl orthosilicate, keep warm for 1 h, filter, dry, and heat from room temperature to 600 °C at a heating rate of 2 °C / min, and calcine for 10 h to obtain Component 1;

[0074] A2: Add 10 g of Component 1, 200 g of absolute ethanol, and 5 g of KH-550 into a reaction kettle, heat up to 60 °C, keep warm for 1 h, carry out suction filtration, washing, and drying to obtain Component 2;

[0075] A3: Add 10 g of Component 2, 20 g of pyromellitic dianhydride, and 500 mL of N,N-dimethylformamide into a reaction flask, heat up to 40 °C, keep warm for 3 h, filter, wash, and dry to obtain a regulator.

[0076] Comparative Example 4

[0077] The preparation method of the beach sludge solidifying agent comprises the following steps:

[0078] Compared with Example 4, in Comparative Example 4, only the regulator prepared in Example 1 added in Example 4 is replaced with the regulator prepared in Comparative Example 1 in an equal amount, and the other components and processes are exactly the same as those in Example 4.

[0079] Comparative Example 5

[0080] The preparation method of the beach sludge solidifying agent comprises the following steps:

[0081] Compared with Example 4, in Comparative Example 5, only the regulator prepared in Example 1 added in Example 4 was replaced with an equal amount of the regulator prepared in Comparative Example 3, and the remaining components and processes were exactly the same as those in Example 4.

[0082] Comparative Example 6

[0083] The preparation method of the beach silt solidifying agent includes the following steps:

[0084] Compared with Example 4, in Comparative Example 6, only the regulator prepared in Example 1 added in Example 4 was replaced with an equal amount of the regulator prepared in Comparative Example 3, and the remaining components and processes were exactly the same as those in Example 4.

[0085] Comparative Example 7

[0086] The preparation method of the beach silt solidifying agent includes the following steps:

[0087] Compared with Example 4, in Comparative Example 6, only the regulator prepared in Example 1 added in Example 4 was deleted, and the remaining components and processes were exactly the same as those in Example 4.

[0088] Performance detection

[0089] Collect the near-shore beach silt, and determine the basic physical and mechanical property indexes of the beach silt according to the "Standard for Geotechnical Test Methods" (GB / T 50123-1999). The test results are shown in Table 1;

[0090] Table 1: Statistical table of silt physical property data

[0091]

[0092]

[0093] (1) Unconfined compressive strength

[0094] Detect according to the "Standard for Geotechnical Test Methods" (GB / T 50123-1999). Conduct an unconfined compressive strength test using an SJ-1A.G triaxial shear instrument. The specimen size is Φ39.1mm×80mm (diameter×height). Tamp each layer 15 times from the edge to the center in a spiral direction. Immediately put the prepared specimen into a self-sealing bag to prevent water evaporation. Cure for 3d, 7d, 28d, and 60d respectively under constant temperature conditions (20±1°C).

[0095] At the corresponding age, use a universal testing machine to test the unconfined compressive strength of the specimen. The loading speed is 1.2mm / min. Refer to "Soft Soil Solidifying Agent" (CJT 526-2018), and the basic admixture ratio of the solidifying agent (dry weight of the solidifying agent / wet weight of the silt) is 8%. The test results are shown in Table 3;

[0096] (2) Salt tolerance performance: To test the destructiveness of SO4 2- ions on solidified soil, after the specimens were cured for 21 days, the specimens were immersed in seawater for 7 days (the ion concentrations in seawater are shown in Table 2), and the solution volume was 1.5 L. The unconfined compressive strength of the specimens after immersion was tested, and the strength ratio ε was calculated:

[0097] ε(%) = (P / P0) × 100%

[0098] In the formula, ε(%) - strength ratio, %; P0 - unconfined compressive strength of the specimen, kPa; P - unconfined compressive strength of the specimen after being immersed in seawater for 7 days, kPa. The test results are shown in Table 3:

[0099] Table 2: Statistical table of ion concentrations in seawater

[0100] <![CDATA[Na + > <![CDATA[Mg 2+ > <![CDATA[K + > <![CDATA[Ca 2+ > <![CDATA[Cl - > <![CDATA[SO4 2- > <![CDATA[HCO 3- > seawater 1789 30.1 176 512 3589 992 75.6

[0101] Table 3: Statistical table of performance test data of Examples 4-6 and Comparative Examples 4-7

[0102]

[0103]

[0104] As can be seen from Table 3, the curing agent prepared in this application not only has a good curing effect on saline-alkali beach silt, but also the solidified soil obtained by curing has excellent mechanical properties and excellent salt erosion resistance when used in seawater.

[0105] The above has described a specific embodiment of the present invention in detail, but the content described is only a preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the present invention application should still fall within the scope covered by the patent of the present invention.

Claims

1. Beach sludge solidifying agent, characterized in that, It includes the following raw materials in parts by weight: 6 - 12 parts by weight of cement, 0.02 - 0.1 part by weight of triethanolamine, 1 - 2.5 parts by weight of water reducer, 6 - 12 parts by weight of fly ash, 3 - 6 parts by weight of regulator; The preparation method of the regulator includes the following steps: A1: Add anhydrous ethanol, deionized water, 25 - 30wt% ammonia water into the reaction kettle and disperse evenly. Then continue to add cetyltrimethylammonium bromide and 1,3,5 - triisopropylbenzene, heat up to 50 - 60°C, disperse evenly, add tetraethyl orthosilicate, keep warm for 1 - 3h, filter, dry, and calcine to obtain Component One; A2: Add Component One, anhydrous ethanol, and KH - 550 into the reaction kettle, heat up to 60 - 80°C, keep warm for 1 - 3h, carry out suction filtration, washing, and drying to obtain Component Two; A3: Add Component Two, pyromellitic dianhydride, and N,N - dimethylformamide into the reaction flask, heat up to 40 - 50°C, keep warm for 3 - 6h, filter, wash, and dry to obtain Component Three; A4: In a nitrogen atmosphere, add Component Three, triethylenetetramine, and xylene into the reaction flask, heat up to 120 - 130°C, keep warm for 1 - 3h, then continue to heat up to 170 - 180°C, keep warm for 3 - 6h, and then distill off xylene under reduced pressure, wash, and dry to obtain Component Four; A5: Add Component Four and benzyl chloride into the reaction flask, heat up to 100 - 130°C, keep warm for 3 - 6h to obtain the regulator.

2. The beach silt solidifying agent according to claim 1, wherein The water reducer is a polycarboxylate superplasticizer, a lignosulfonate water reducer, or an amino superplasticizer.

3. The beach sludge solidifying agent according to claim 1, characterized in that, In A1, the mass ratio of anhydrous ethanol, deionized water, 25 - 30wt% ammonia water, cetyltrimethylammonium bromide, 1,3,5 - triisopropylbenzene, and tetraethyl orthosilicate is 10 - 20:50 - 100:1 - 5:2 - 3:0.5 - 1.5:5 - 10.

4. The beach silt solidifying agent according to claim 1, characterized in that, In A2, the mass ratio of Component One, anhydrous ethanol, and KH - 550 is 10:200 - 300:5 - 10.

5. The beach sludge solidifying agent according to claim 1, wherein, In A3, the addition ratio of Component Two, pyromellitic dianhydride, and N,N - dimethylformamide is 1g:2 - 5g:50 - 100mL.

6. The beach silt solidifying agent according to claim 1, wherein, In A4, the mass ratio of Component Three, triethylenetetramine, and xylene is 1:1 - 5:0.2 - 0.

5.

7. The beach silt solidifying agent according to claim 1, characterized in that, In A5, the mass ratio of Component Four and benzyl chloride is 1:0.5 - 1.

8. The preparation method of the tidal flat sludge solidifying agent according to claim 1, characterized in that, Weigh each component of the raw materials according to the parts by weight of the raw material components, and mix cement, triethanolamine, water reducer, fly ash, and regulator in sequence to obtain the beach sludge solidifying agent.

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