Multi-source waste mud solidifying agent, mobile temperature control stirring device and use method thereof

Abstract

The present application relates to the field of solidifying agent and solidifying soil stirring technology, multi-source waste mud solidifying agent and mobile temperature control stirring device, the multi-source waste mud solidifying agent includes industrial solid waste, cement-based material, fiber, composite activator, active material and auxiliary agent. Industrial solid waste is made by mixing one or more of steel slag, fly ash, slag, desulfurization gypsum and alkali residue, the composite activator includes one or more combinations of sodium sulfate, sodium silicate, sodium hydroxide and calcium hydroxide. The mobile temperature control stirring device includes a mobile car, a soil stirring chamber, a solidified soil stirring chamber, a solidifying agent stirring chamber, a fiber treatment chamber, a temperature control water tank, a pumping pipeline and a PLC control system. The solidified soil in the application has the advantages of high strength, strong crack resistance and stable performance. The invented mixer is more fully stirred and has more complete functions, is mobile, covers all portable application scenarios, can mix different requirements of flow state solidified soil, and has the advantages of convenient construction and mobility.

Description

Technical Field

[0001] This invention relates to the field of solidified soil mixing technology, specifically to a multi-source waste mud solidification agent and its mobile temperature-controlled mixing device and method of use. Background Technology

[0002] Waste mud and slurry mainly originate from tunnel boring machine (TBM) projects, pile foundation construction, mining, and river and lake dredging. During TBM construction, the cutting of strata generates large amounts of mud and slag, involving various types such as clay, fine sand, and pebbles. Traditional off-site disposal is not only costly but also prone to environmental pollution. Traditional landfill methods face the risks of land resource scarcity and secondary pollution. Waste clay and mud can be combined with other solidifying agents, water, and admixtures to form fluidized solidified soil, which is widely used in engineering backfilling, roadbed materials, and the production of recycled building materials for reinforcement treatment. Fluidized solidified soil, with its high fluidity, self-compacting properties, and low shrinkage, has significant advantages in backfilling and foundation treatment in confined spaces. However, its performance is limited by the hydration reaction rate of the solidifying agent and temperature sensitivity. Traditional mixing processes rely on fixed equipment, and fluctuations in ambient temperature can easily lead to unstable activity of the solidifying agent, causing problems such as deviations in setting time and uneven strength. Furthermore, equipment relocation costs are high.

[0003] With rapid economic development and accelerating urbanization, the high-value utilization of industrial solid wastes such as steel slag, fly ash, slag, desulfurization gypsum, and alkali slag faces severe environmental pressure and resource waste due to their accumulation. However, existing technologies often suffer from performance degradation of the matrix material due to the incorporation of solid waste (e.g., insufficient strength, volume instability, abnormal coagulation) or sacrifice economic efficiency and universality by relying on high dosages and complex pretreatment. This invention addresses this core contradiction by providing an innovative solution: through precise selection of one or more of the aforementioned solid wastes, utilizing their complementary characteristics and potential synergistic effects, and combining one or more composite activators, performance bottlenecks are effectively overcome at significantly lower incorporation levels than conventional methods. This achieves efficient and high-value resource utilization of solid wastes while ensuring that the key performance of the final product meets standards and possesses economic feasibility for industrial application. Solidified soil with a single solidifying agent often suffers from problems such as high shrinkage, easy cracking, and poor durability. This paper proposes a novel solidifying agent combined with fiber treatment for engineering waste soil with different moisture contents, which is beneficial to improving the crack resistance and long-term durability of solidified soil.

[0004] While the soil solidified by the fluidized solidified soil conditioner proposed in patent CN 119144343 A, "A Fluidized Solidified Soil Conditioner and Its Preparation Method," exhibits good mechanical strength, low cost, and convenient construction, its crack resistance is poor, which is detrimental to the long-term stability and durability of the project. The manufacturing method proposed in patent CN 219404776U, "A Fluidized Solidified Soil Mixing Device," may improve uniformity and mixing efficiency, but the entire construction process is in a fixed location, making movement inconvenient and potentially increasing equipment relocation costs, thus not entirely applicable in engineering. The multi-stage weighing mobile fluidized solidified soil mixing truck proposed in patent CN 119589815A, while mobile, has a simple structure and can only perform simple mixing. Furthermore, due to the lack of temperature control, in actual operation, the hydration reaction of the solidifying agent is prone to incomplete reaction, leading to deviations in setting time and ultimately uncontrollable setting time. Summary of the Invention

[0005] The technical problem to be solved by this invention is that waste mud and soil are difficult to use directly. Existing technologies often lead to the deterioration of the matrix material properties due to the addition of solid waste (such as insufficient strength, unstable volume, abnormal solidification, poor crack resistance, and poor long-term durability), or rely on high dosage and complex pretreatment, thus sacrificing economy and universality. In addition, the current on-site fluid solidification equipment is immobile and the temperature is uncontrollable, making it difficult to fully stir and control the reaction and solidification time.

[0006] To solve the above-mentioned technical problems, the technical solution of the present invention is to provide a mobile temperature-controlled mixing device, including a mobile vehicle. The mobile vehicle has a cargo compartment, and the cargo compartment contains a solidified soil mixing chamber. Above the solidified soil mixing chamber is a soil mixing chamber. Above the solidified soil mixing chamber, there is also a curing agent mixing chamber and a temperature-controlled water tank adjacent to the soil mixing chamber. The temperature-controlled water tank is located above the curing agent mixing chamber. The temperature-controlled water tank has a soil inlet communicating with the soil mixing chamber and a curing agent inlet communicating with the curing agent mixing chamber. The bottom of the soil mixing chamber has a slurry outlet communicating with the solidified soil mixing chamber. The bottom of the curing agent mixing chamber has a curing agent outlet communicating with the solidified soil mixing chamber. The mobile vehicle is equipped with a conveyor belt, which is connected to the soil mixing chamber and corresponds to the waste slurry inlet of the soil mixing chamber. The mobile vehicle is equipped with a PLC control cabinet, which is connected to the solidified soil mixing chamber, the soil mixing chamber, the curing agent mixing chamber, the temperature-controlled water tank, and the conveyor belt.

[0007] Optionally, multiple shock absorbers are provided between the bottom of the solidified soil mixing chamber and the truck bed, a weighing sensor is provided on the transmission belt, the transmission belt is hinged to the soil mixing chamber, and a foldable support frame is provided at the bottom of the transmission belt.

[0008] Optionally, a fiber chamber is provided above the solidified soil mixing chamber, the fiber chamber is provided with a fiber inlet, the fiber chamber is provided with a cutter, and the bottom of the fiber chamber is provided with a fiber outlet that communicates with the solidified soil mixing chamber.

[0009] Optionally, the solidified soil mixing chamber is provided with a lower spiral mixing blade and an upper spiral mixing blade, with at least two of each. A vibrating rod is provided between the lower spiral mixing blade and the upper spiral mixing blade, and a solidified soil outlet is provided at the bottom of the outer side of the solidified soil mixing chamber.

[0010] Optionally, the soil mixing chamber is equipped with an upper soil crusher mixing blade, a middle soil crusher mixing blade, and a lower soil crusher mixing blade. Each of the upper, middle, and lower soil crusher mixing blades is provided with at least two blades, and all three mixing blades are equipped with blades.

[0011] Optionally, the temperature-controlled water tank is provided with a water inlet, and a heater is provided inside the temperature-controlled water tank.

[0012] Optionally, the curing agent mixing chamber is provided with an upper curing agent mixing paddle and a lower curing agent mixing paddle, and there are at least two of each of the upper and lower curing agent mixing paddles. The upper side of the curing agent mixing chamber is provided with a curing agent inlet.

[0013] Optionally, the soil inlet and the solidified soil outlet are provided with multi-plate discharge plates, which are discs composed of multiple conical plates. The temperature-controlled water tank and the side wall of the solidified soil mixing chamber are provided with chutes, and hydraulic push rods are provided in the chutes. Each conical plate is located in the chutes and connected to the hydraulic push rods.

[0014] Optionally, discharge plates are hinged to the curing agent inlet, mud inlet, fiber inlet, and curing agent inlet, and hydraulic rods corresponding to each discharge plate are hinged to the bottom of the curing agent mixing chamber and the top of the solidified soil mixing chamber. The discharge plates are hinged to their corresponding hydraulic rods.

[0015] A multi-source waste mud solidification agent includes industrial solid waste, cement-based materials, fibers, composite activators, active materials, and auxiliary agents. By weight, the industrial solid waste comprises 0-25 parts, made from one or more of steel slag, fly ash, blast furnace slag, desulfurized gypsum, and alkaline slag; the cement-based materials comprise 0-5 parts, which are sulfoaluminate cement or silicate cement; the fibers comprise 0-0.5 parts, made from one or more of basalt fibers, natural fibers, and modified propylene fibers; the composite activator comprises 0-10 parts, including one or more combinations of sodium sulfate, sodium silicate, sodium hydroxide, and calcium hydroxide; the active materials comprise 0-3 parts, made from one or more of triethanolamine, sodium gluconate, and polycarboxylate superplasticizer; and the auxiliary agents comprise 0-2 parts, including one or more of potassium permanganate, hydrogen peroxide, and Fenton's reagent.

[0016] A method of using a portable temperature-controlled stirring device includes the following steps:

[0017] Step 1: The waste mud and soil from the project are fed into the soil mixing chamber through the waste mud inlet via conveyor belt 2 equipped with a weighing sensor.

[0018] Step 2: Add water to the temperature-controlled water tank, then add water to the soil mixing chamber through the soil inlet, turn on the mixing paddle in the soil crusher, and after working for 5 to 10 minutes, the soil and water will be made into slurry.

[0019] Step 3: Add the curing agent and other raw materials except fibers to the curing agent mixing chamber, and add water to the curing agent mixing chamber through the temperature-controlled water tank. Turn on the upper curing agent mixing paddle and the lower curing agent mixing paddle to fully dissolve and mix the curing agent evenly.

[0020] Step 4: Add the fiber raw material with curing agent into the fiber chamber and turn on the cutting machine to cut the fiber;

[0021] Step 5: Open the mud inlet, fiber inlet, curing agent inlet and vibrator, and close the solidified soil outlet to allow the waste mud, curing agent and fiber to enter the solidified soil mixing chamber. Turn on the spiral agitator and mix for 5 to 10 minutes to make fluidized solidified soil.

[0022] Step 6: Open the solidified soil outlet to discharge the solidified soil. After discharge, close the spiral mixing paddle, solidified soil outlet, and vibrator in the solidified soil mixing chamber to complete the solidified soil discharge.

[0023] In summary, the present invention has at least one of the following beneficial effects:

[0024] 1. The fluidized solidified soil mixer of the present invention has more thorough mixing and more complete functions. It is mobile and portable, covering all application scenarios. It can mix fluidized solidified soil with different requirements. It has the advantages of convenient construction and mobility. The fluidized solidified soil after mixing reacts more fully, faster and has higher strength. Under the same conditions, it can reduce the amount of curing agent material, shorten the curing time, improve curing efficiency and save usage costs.

[0025] 2. By integrating a temperature control module and a mobile mechanism, this invention can adjust the temperature inside the mixing chamber in real time through a dynamic temperature control system, matching the thermodynamic properties of the curing agent, suppressing high-temperature early setting or low-temperature slow setting, and ensuring a uniform and sufficient hydration reaction.

[0026] 3. This invention supports rapid vehicle-mounted relocation and, combined with the immediate processing of on-site solidified soil raw materials and waste residue, reduces material transportation energy consumption by more than 50%, making it particularly suitable for dispersed construction sites and remote areas.

[0027] 4. The curing agent of this invention has the characteristics of high strength, green, low energy consumption, and low dosage. The cured fluidized soil has the advantages of high fluidity, strong crack resistance, high strength, stable performance, and low shrinkage. Attached Figure Description

[0028] Figure 1 This is a cross-sectional view of the mobile temperature-controlled stirring device of the present invention;

[0029] Figure 2 This is a schematic diagram of the multi-plate discharge plate structure of the mobile temperature-controlled stirring device of the present invention;

[0030] Figure 3 This is a schematic diagram of the discharge plate structure of the mobile temperature-controlled stirring device of the present invention;

[0031] In the diagram: 1. Mobile vehicle; 2. Conveyor belt; 3. Waste mud inlet; 4. Soil mixing chamber; 5. Temperature-controlled water tank; 5-1. Upper soil crusher mixing paddle; 5-2. Middle soil crusher mixing paddle; 5-3. Lower soil crusher mixing paddle; 6. Heater; 7-1. Soil water inlet; 7-2. Hardener water inlet; 8. Water inlet; 9. Hardener mixing chamber; 10. Hardener inlet; 11-1. Upper hardener... 11-2. Lower curing agent mixing paddle; 12. Fiber chamber; 13. Fiber inlet; 14. Cutting machine; 15. Solidified soil mixing chamber; 16-1. Upper spiral mixing paddle; 16-2. Lower spiral mixing paddle; 17. Vibrator; 18. Solidified soil outlet; 19. Shock absorber; 20. Support frame; 23. PLC control cabinet; 24. Slurry outlet; 25. Curing agent outlet; 26. Fiber outlet. Detailed Implementation

[0032] The following combination Figure 1-3 The present invention will be described in further detail below.

[0033] This invention discloses a mobile temperature-controlled stirring device, referring to... Figure 1 The system includes a mobile vehicle 1, which has a cargo compartment containing a soil mixing chamber 15. Above the soil mixing chamber 15 is a soil mixing chamber 4. Above the soil mixing chamber 15 are a curing agent mixing chamber 9 and a temperature-controlled water tank 5, which are adjacent to the soil mixing chamber 4. The temperature-controlled water tank 5 is located above the curing agent mixing chamber 9 and has a soil inlet 7-1 connected to the soil mixing chamber 4 and a curing agent inlet 7-2 connected to the curing agent mixing chamber 9. The bottom of the soil mixing chamber 4 is equipped with... There is a mud discharge port 24 connected to the solidified soil mixing chamber 15. The bottom of the solidifying agent mixing chamber 9 is provided with a solidifying agent discharge port 25 connected to the solidified soil mixing chamber 15. The mobile vehicle 1 is provided with a conveyor belt 2, which is connected to the soil mixing chamber 4 and corresponds to the waste mud inlet 3 of the soil mixing chamber 4. The mobile vehicle 1 is provided with a PLC control cabinet 23, which is connected to the solidified soil mixing chamber 15, the soil mixing chamber 4, the solidifying agent mixing chamber 9, the temperature-controlled water tank 5, and the conveyor belt 2.

[0034] Specifically, the PLC control cabinet 23 can control each component and control the mixing time of each mixing chamber, so as to mix or feed materials at the appropriate time.

[0035] In a further embodiment, multiple shock absorbers 19 are provided between the bottom of the solidified soil mixing chamber 15 and the carriage, a weighing sensor is provided on the transmission belt 2, the transmission belt 2 is hinged to the soil mixing chamber 4, and a foldable support frame 20 is provided at the bottom of the transmission belt 2.

[0036] Specifically, the shock absorber 19 can buffer the mixing or movement, improving the stability of mixing and movement. The weighing sensor on the transmission belt 2 can weigh the waste mud entering the soil mixing chamber 4, thus facilitating the preparation of a suitable proportion of curing agent.

[0037] In a further embodiment, a fiber chamber 12 is provided above the solidified soil mixing chamber 15, a fiber inlet 13 is provided on the fiber chamber 12, a cutter 14 is provided inside the fiber chamber 12, and a fiber outlet 26 communicating with the solidified soil mixing chamber 15 is provided at the bottom of the fiber chamber 12.

[0038] Specifically, fiber chamber 12 can be filled with fiber raw materials, and the cutting tooth spacing of the cutter 14 is adjustable, which can cut the fiber into different sizes to suit various application scenarios.

[0039] In a further embodiment, the solidified soil mixing chamber 15 is provided with a lower spiral mixing blade 16-2 and an upper spiral mixing blade 16-1, with at least two of each. A vibrating rod 17 is provided between the lower spiral mixing blade 16-2 and the upper spiral mixing blade 16-1, and a solidified soil outlet 18 is provided at the bottom of the outer side of the solidified soil mixing chamber 15.

[0040] Specifically, the lower spiral agitator 16-2 and the upper spiral agitator 16-1 have opposite stirring directions, which can more evenly stir the mud. At the same time, the vibrating rod 7 can also vibrate the mud to assist in stirring, and can also assist in feeding during feeding to make the feeding more uniform.

[0041] In a further embodiment, the soil mixing chamber 4 is provided with an upper soil crusher mixing blade 5-1, a middle soil crusher mixing blade 5-2, and a lower soil crusher mixing blade 5-3. There are at least two of each of the three mixing blades, and each mixing blade is provided with a blade.

[0042] Specifically, the mixing directions of adjacent mixing blades of the upper soil crusher mixing blade 5-1, the middle soil crusher mixing blade 5-2, and the lower soil crusher mixing blade 5-3 are opposite, which can more evenly mix the waste mud. Since this is the initial mixing, the waste mud contains large-sized waste materials such as soil lumps. Therefore, blades are set on the mixing blades to give the mixing blades a crushing effect, breaking down large-sized materials, which is conducive to the uniform mixing of mud.

[0043] In a further embodiment, the temperature-controlled water tank 5 is provided with a water inlet 8 and a heater 6 is provided inside the temperature-controlled water tank 5. The temperature-controlled water tank 5 can heat the mixing water, so that the mud is mixed at a suitable temperature, which is conducive to the reaction of the curing agent and improves the curing efficiency.

[0044] In a further embodiment, the curing agent mixing chamber 15 is provided with an upper curing agent mixing paddle 11-1 and a lower curing agent mixing paddle 11-2, and there are at least two of each of the upper curing agent mixing paddle 11-1 and the lower curing agent mixing paddle 11-2. The upper side of the curing agent mixing chamber 15 is provided with a curing agent inlet 10.

[0045] In a further implementation, refer to Figure 2 The soil inlet 7-1 and the solidified soil outlet 18 are equipped with multi-plate discharge plates, which are discs composed of multiple conical plates. The side walls of the temperature-controlled water tank 5 and the solidified soil mixing chamber 15 are equipped with chutes, and hydraulic push rods are installed in the chutes. Each conical plate is installed in the chutes and connected to the hydraulic push rods.

[0046] Specifically, the multi-plate discharge plate can partially open its conical section as needed to control the water volume and discharge speed. Furthermore, the size of the multi-plate discharge plate at the solidified soil discharge port 18 is larger than that at the soil inlet port 7-1, increasing the efficiency of solidified slurry discharge.

[0047] In a further implementation, refer to Figure 3 Discharge plates are hinged to the curing agent inlet 7-2, the mud inlet 24, the fiber inlet 26, and the curing agent inlet 25. Hydraulic rods corresponding to each discharge plate are hinged to the bottom of the curing agent mixing chamber 15 and the top of the solidified soil mixing chamber 15. The discharge plates are hinged to their corresponding hydraulic rods.

[0048] This invention also discloses a multi-source waste mud solidification agent, comprising industrial solid waste, cement-based materials, fibers, composite activators, active materials, and auxiliary agents. The industrial solid waste, by weight, comprises 0-25 parts, made from one or more of steel slag, fly ash, blast furnace slag, desulfurized gypsum, and alkaline slag; the cement-based materials comprise 0-5 parts, which are sulfoaluminate cement or silicate cement; the fibers comprise 0-0.5 parts, made from one or more of basalt fibers, natural fibers, and modified propylene fibers; the composite activator comprises 0-10 parts, including one or more combinations of sodium sulfate, sodium silicate, sodium hydroxide, and calcium hydroxide; the active materials comprise 0-3 parts, made from one or more of triethanolamine, sodium gluconate, and polycarboxylate superplasticizer; and the auxiliary agents comprise 0-2 parts, including one or more of potassium permanganate, hydrogen peroxide, and Fenton's reagent.

[0049] The modified propylene fiber is made from waste plastic bottles (using the waste rubber granules modified polypropylene fiber disclosed in invention publication CN118345523A):

[0050] Step 1: Put the waste plastic bottles into the crusher and cut them into shredded plastic.

[0051] Step 2: Wash the plastic fragments from Step 1 with deionized water, let them air dry, and then dry them in an oven.

[0052] Step 3: Mix the dried plastic scraps and waste rubber granules evenly for blending modification, and then use a twin-screw extruder.

[0053] The blended particles were obtained;

[0054] Step 4: Mix the blended granules obtained in Step 3 with a compatibilizer, and extrude the melt through a twin-screw extruder.

[0055] Masterbatch is obtained after water cooling, traction, pelletizing, and drying;

[0056] Step 5: Use a two-component spinning machine to spin the masterbatch to obtain modified fiber products;

[0057] Step 6: Perform surface modification treatment on the modified fiber products to obtain waste rubber particles modified polypropylene fibers.

[0058] Specifically, the ratio of industrial solid waste to slurry mass in the curing agent, as well as the ratio of additives to slurry mass, are related to the organic matter content and moisture content of the slurry, as shown in the table below:

[0059]

[0060]

[0061] The relationship between the specifications of the curing agent material and the strength range of the slurry is shown in the table below:

[0062] Strength range Curing agent material specifications ≤1MPa 240μm~620μm 1~3MPa 65μm~230μm ≥3MPa 15μm~60μm

[0063] The relationship between the required crack rate of the solidified fluidized soil and the mass percentage of the fiber is shown in the table below:

[0064] Crack rate Fiber content 4.5％＞ 0 2.5％～0.8％ 0.1％ 0.8％～0.2％ 0.1～0.3％ 0.2％＜ 0.3～0.5％

[0065] This invention also discloses a method for using a mobile temperature-controlled stirring device, employing the aforementioned multi-source waste mud solidifying agent, comprising the following steps:

[0066] Step 1: The waste mud and soil from the project is fed into the soil mixing chamber 4 through the waste mud inlet 3 via a conveyor belt 2 equipped with a weighing sensor.

[0067] Step 2: Add water to the temperature-controlled water tank 5, and then add water to the soil mixing chamber 4 through the soil inlet 7-1. Turn on the mixing paddle in the soil crusher 4 and work for 5 to 10 minutes to make the soil and water into slurry.

[0068] Step 3: Add the remaining raw materials of the curing agent, excluding the fiber, into the curing agent mixing chamber 9, and add water to the curing agent mixing chamber 9 through the temperature-controlled water tank 5. Turn on the upper curing agent mixing paddle 11-1 and the lower curing agent mixing paddle 11-2 to fully dissolve and stir the curing agent evenly.

[0069] Step 4: Add the fiber raw material with curing agent into the fiber chamber 12, and turn on the cutting machine 14 to cut the fiber;

[0070] Step 5: Open the mud inlet 24, fiber inlet 26, curing agent inlet 25 and vibrator 17, and close the solidified soil outlet 18 to allow the waste mud, curing agent and fiber to enter the solidified soil mixing chamber 15. Turn on the spiral agitator and stir for 5 to 10 minutes to make fluidized solidified soil.

[0071] Step 6: Open the solidified soil outlet 18 to discharge the solidified soil. After the discharge is completed, close the spiral mixing paddle, solidified soil outlet 18 and vibrator 17 in the solidified soil mixing chamber 15 to complete the solidified soil discharge.

[0072] The fluidized solidified soil mixer disclosed in this invention provides more thorough mixing, more complete functions, and is portable and applicable to all scenarios. It can mix fluidized solidified soil with different requirements and has the advantages of convenient construction and portability. The fluidized solidified soil reacts more fully and quickly after mixing and has higher strength. Under the same conditions, it can reduce the amount of curing agent material, shorten the curing time, improve curing efficiency, and save on usage costs.

[0073] Example 1

[0074] In this embodiment, the waste mud sample had a water content of 89%, an organic matter mass percentage of 3.74%, and a salt concentration of 0.385%.

[0075] The required slurry solidifying agent is expressed as a percentage of the slurry mass, in parts by weight. The solidifying agent raw materials are: 7 parts industrial solid waste, 0.1 parts fiber, 2 parts active material, and 2 parts auxiliary agent; the composite activator is expressed as 10 parts by weight of the solidifying agent materials.

[0076] The mass ratio of steel slag, fly ash, blast furnace slag, desulfurization gypsum, and alkali slag in industrial solid waste is 8:15:65:8:4 (fineness: 380μm).

[0077] The fiber material is modified acrylic fiber;

[0078] The composite activator is the mass percentage of the curing agent material, in which the mass ratio of sodium sulfate, sodium silicate, sodium hydroxide, calcium hydroxide, sulfoaluminate cement, and silica fume is 0.5:5:2:5:5:3;

[0079] The mass ratio of triethanolamine, sodium gluconate, and polycarboxylate superplasticizer in the active material is 7:5:8;

[0080] The mass ratio of the excipients potassium permanganate, hydrogen peroxide, and Fenton's reagent is 13:3:4.

[0081] The preparation method of the fluidized solidified soil in this embodiment is as follows:

[0082] Step 1: The waste mud and soil from the project is fed into the soil mixing chamber 4 through the waste mud inlet 3 via a conveyor belt 2 equipped with a weighing sensor.

[0083] Step 2: Add water to the temperature-controlled water tank 5, and then add water to the soil mixing chamber 4 through the soil inlet 7-1. Turn on the mixing paddle in the soil crusher 4 and work for 5 to 10 minutes to make the soil and water into slurry.

[0084] Step 3: Add the remaining raw materials of the curing agent, excluding the fiber, into the curing agent mixing chamber 9, and add water to the curing agent mixing chamber 9 through the temperature-controlled water tank 5. Turn on the upper curing agent mixing paddle 11-1 and the lower curing agent mixing paddle 11-2 to fully dissolve and stir the curing agent evenly.

[0085] Step 4: Add the fiber raw material with curing agent into the fiber chamber 12, and turn on the cutting machine 14 to cut the fiber;

[0086] Step 5: Open the mud inlet 24, fiber inlet 26, curing agent inlet 25 and vibrator 17, and close the solidified soil outlet 18 to allow the waste mud, curing agent and fiber to enter the solidified soil mixing chamber 15. Turn on the spiral agitator and stir for 5 to 10 minutes to make fluidized solidified soil.

[0087] Step 6: Open the solidified soil outlet 18 to discharge the solidified soil. After the discharge is completed, close the spiral mixing paddle, solidified soil outlet 18 and vibrator 17 in the solidified soil mixing chamber 15 to complete the solidified soil discharge.

[0088] Example 2

[0089] The waste mud sample in this embodiment has a water content of 126%, an organic matter mass percentage of 9.16%, and a salt concentration of 0.213%.

[0090] The required mud solidifying agent is expressed as a percentage of the mud mass, in parts by weight. The solidifying agent raw materials are: 9 parts industrial solid waste, 0.3 parts fiber, 2 parts active material, and 4 parts auxiliary agent; the composite sizing agent is expressed as 10 parts by weight of the solidifying agent materials.

[0091] The mass ratio of steel slag, fly ash, blast furnace slag, desulfurization gypsum, and alkali slag in industrial solid waste is 8:15:65:8:4 (fineness: 96μm).

[0092] The fiber material is modified acrylic fiber;

[0093] The composite curing agent is defined by the mass ratio of the curing agent materials, wherein the mass ratio of sodium sulfate, sodium silicate, sodium hydroxide, calcium hydroxide, sulfoaluminate cement, and silica fume is 0.5:5:2:5:5:3.

[0094] The mass ratio of triethanolamine, sodium gluconate, and polycarboxylate superplasticizer in the active material is 7:5:8;

[0095] The mass ratio of the excipients potassium permanganate, hydrogen peroxide, and Fenton's reagent is 13:3:4.

[0096] The preparation method of the fluidized solidified soil in this embodiment is as follows:

[0097] Step 1: The waste mud and soil from the project is fed into the soil mixing chamber 4 through the waste mud inlet 3 via a conveyor belt 2 equipped with a weighing sensor.

[0098] Step 2: Add water to the temperature-controlled water tank 5, and then add water to the soil mixing chamber 4 through the soil inlet 7-1. Turn on the mixing paddle in the soil crusher 4 and work for 5 to 10 minutes to make the soil and water into slurry.

[0099] Step 3: Add the remaining raw materials of the curing agent, excluding the fiber, into the curing agent mixing chamber 9, and add water to the curing agent mixing chamber 9 through the temperature-controlled water tank 5. Turn on the upper curing agent mixing paddle 11-1 and the lower curing agent mixing paddle 11-2 to fully dissolve and stir the curing agent evenly.

[0100] Step 4: Add the fiber raw material with curing agent into the fiber chamber 12, and turn on the cutting machine 14 to cut the fiber;

[0101] Step 5: Open the mud inlet 24, fiber inlet 26, curing agent inlet 25 and vibrator 17, and close the solidified soil outlet 18 to allow the waste mud, curing agent and fiber to enter the solidified soil mixing chamber 15. Turn on the spiral agitator and stir for 5 to 10 minutes to make fluidized solidified soil.

[0102] Step 6: Open the solidified soil outlet 18 to discharge the solidified soil. After the discharge is completed, close the spiral mixing paddle, solidified soil outlet 18 and vibrator 17 in the solidified soil mixing chamber 15 to complete the solidified soil discharge.

[0103] Example 3

[0104] The waste mud sample in this embodiment has a water content of 145%, an organic matter mass percentage of 14.12%, and a salt concentration of 0.068%.

[0105] The required mud solidifying agent is expressed as a percentage of the mud mass, in parts by weight. The solidifying agent raw materials are: 15 parts industrial solid waste, 0.5 parts fiber, 2 parts active material, and 6 parts auxiliary agent; the composite sizing agent is expressed as 15 parts by weight of the solidifying agent materials.

[0106] The mass ratio of steel slag, fly ash, blast furnace slag, desulfurization gypsum, and alkali slag in industrial solid waste is 8:15:65:8:4 (fineness: 41μm).

[0107] The fiber material is modified acrylic fiber;

[0108] The composite curing agent is defined by the mass ratio of the curing agent materials, wherein the mass ratio of sodium sulfate, sodium silicate, sodium hydroxide, calcium hydroxide, sulfoaluminate cement, and silica fume is 0.5:5:2:5:5:3.

[0109] The mass ratio of triethanolamine, sodium gluconate, and polycarboxylate superplasticizer in the active material is 7:5:8;

[0110] The mass ratio of the excipients potassium permanganate, hydrogen peroxide, and Fenton's reagent is 13:3:4.

[0111] The preparation method of the fluidized solidified soil in this embodiment is as follows:

[0112] Step 1: The waste mud and soil from the project is fed into the soil mixing chamber 4 through the waste mud inlet 3 via a conveyor belt 2 equipped with a weighing sensor.

[0113] Step 2: Add water to the temperature-controlled water tank 5, and then add water to the soil mixing chamber 4 through the soil inlet 7-1. Turn on the mixing paddle in the soil crusher 4 and work for 5 to 10 minutes to make the soil and water into slurry.

[0114] Step 3: Add the remaining raw materials of the curing agent, excluding the fiber, into the curing agent mixing chamber 9, and add water to the curing agent mixing chamber 9 through the temperature-controlled water tank 5. Turn on the upper curing agent mixing paddle 11-1 and the lower curing agent mixing paddle 11-2 to fully dissolve and stir the curing agent evenly.

[0115] Step 4: Add the fiber raw material with curing agent into the fiber chamber 12, and turn on the cutting machine 14 to cut the fiber;

[0116] Step 5: Open the mud inlet 24, fiber inlet 26, curing agent inlet 25 and vibrator 17, and close the solidified soil outlet 18 to allow the waste mud, curing agent and fiber to enter the solidified soil mixing chamber 15. Turn on the spiral agitator and stir for 5 to 10 minutes to make fluidized solidified soil.

[0117] Step 6: Open the solidified soil outlet 18 to discharge the solidified soil. After the discharge is completed, close the spiral mixing paddle, solidified soil outlet 18 and vibrator 17 in the solidified soil mixing chamber 15 to complete the solidified soil discharge.

[0118] Comparison Case 1

[0119] The same waste mud sample as in Example 1 was used. The required mud solidifying agent was expressed as a percentage of the mud mass, in parts by weight. The raw material for the solidifying agent was 7 parts of industrial solid waste.

[0120] The mass ratio of steel slag, fly ash, blast furnace slag, desulfurization gypsum, and alkali slag in industrial solid waste is 8:15:65:8:4 (fineness: 380μm).

[0121] Comparison Case 2

[0122] The same waste mud sample as in Example 2 was used. The required mud solidifying agent was expressed as a percentage of the mud mass, in parts by weight. The solidifying agent raw materials were: 9 parts industrial solid waste and 0.3 parts fiber.

[0123] The mass ratio of steel slag, fly ash, blast furnace slag, desulfurization gypsum, and alkali slag in industrial solid waste is 8:15:65:8:4 (fineness: 96μm).

[0124] The fiber material is modified acrylic fiber;

[0125] Comparison Case 3

[0126] The same waste mud sample as in Example 2 was used. The required mud solidifying agent was expressed as a percentage of the mud mass, in parts by weight. The solidifying agent raw materials were: 9 parts industrial solid waste and 0.3 parts fiber; the composite hair growth agent was expressed as 10 parts by weight of the solidifying agent material.

[0127] The mass ratio of steel slag, fly ash, blast furnace slag, desulfurization gypsum, and alkali slag in industrial solid waste is 8:15:65:8:4 (fineness: 96μm).

[0128] The fiber material is modified acrylic fiber;

[0129] The composite curing agent is defined by the mass ratio of the curing agent materials, wherein the mass ratio of sodium sulfate, sodium silicate, sodium hydroxide, calcium hydroxide, sulfoaluminate cement, and silica fume is 0.5:5:2:5:5:3.

[0130] Comparison Case 4

[0131] The same waste mud sample as in Example 3 was used. The required mud solidifying agent was expressed as a percentage of the mud mass, in parts by weight. The solidifying agent raw materials were: 15 parts industrial solid waste, 2 parts active material, and 0.5 parts fiber. The composite hair growth agent was expressed as 10 parts by weight of the solidifying agent materials.

[0132] The mass ratio of steel slag, fly ash, blast furnace slag, desulfurization gypsum, and alkali slag in industrial solid waste is 8:15:65:8:4 (fineness: 41μm).

[0133] The fiber material is modified acrylic fiber;

[0134] The composite curing agent is defined by the mass ratio of the curing agent materials, wherein the mass ratio of sodium sulfate, sodium silicate, sodium hydroxide, calcium hydroxide, sulfoaluminate cement, and silica fume is 0.5:5:2:5:5:3.

[0135] The mass ratio of triethanolamine, sodium gluconate, and polycarboxylate superplasticizer in the active material is 7:5:8;

[0136] The engineering strength and crack rate of the various embodiments and comparative examples are shown in the table below:

[0137]

[0138] As can be seen from the table, the actual engineering strength of using only some of the raw materials from industrial solid waste, cement-based materials, fibers, composite sizing agents, active materials, and additives as curing agents is far less than the actual engineering strength of the curing agent used in this application. Furthermore, the addition of fiber raw materials in this application can greatly reduce the crack rate of the cured soil, making it highly practical.

[0139] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A mobile temperature-controlled stirring device, characterized in that, The system includes a mobile vehicle (1), which has a cargo compartment. The cargo compartment contains a soil mixing chamber (15). Above the soil mixing chamber (15) is a soil mixing chamber (4). Above the soil mixing chamber (15) are a curing agent mixing chamber (9) and a temperature-controlled water tank (5) adjacent to the soil mixing chamber (4). The temperature-controlled water tank (5) is located above the curing agent mixing chamber (9). The temperature-controlled water tank (5) has a soil inlet (7-1) connected to the soil mixing chamber (4) and a curing agent inlet (7-2) connected to the curing agent mixing chamber (9). The bottom of the soil mixing chamber (4) is equipped with… There is a mud discharge port (24) connected to the solidified soil mixing chamber (15). The bottom of the solidifying agent mixing chamber (9) is provided with a solidifying agent discharge port (25) connected to the solidified soil mixing chamber (15). The mobile vehicle (1) is provided with a conveyor belt (2). The conveyor belt (2) is connected to the soil mixing chamber (4) and corresponds to the waste mud inlet (3) of the soil mixing chamber (4). The mobile vehicle (1) is provided with a PLC control cabinet (23). The PLC control cabinet (23) is connected to the solidified soil mixing chamber (15), the soil mixing chamber (4), the solidifying agent mixing chamber (9), the temperature-controlled water tank (5), and the conveyor belt (2). Above the solidified soil mixing chamber (15) is a fiber chamber (12), the fiber chamber (12) is provided with a fiber inlet (13), the fiber chamber (12) is provided with a cutter (14), and the bottom of the fiber chamber (12) is provided with a fiber outlet (26) that communicates with the solidified soil mixing chamber (15). The solidified soil mixing chamber (15) is equipped with a lower spiral mixing blade (16-2) and an upper spiral mixing blade (16-1). There are at least two lower spiral mixing blades (16-2) and two upper spiral mixing blades (16-1). A vibrating rod (17) is provided between the lower spiral mixing blades (16-2) and the upper spiral mixing blades (16-1). A solidified soil outlet (18) is provided at the bottom of the outer side of the solidified soil mixing chamber (15). The soil mixing chamber (4) is equipped with an upper soil crusher mixing blade (5-1), a middle soil crusher mixing blade (5-2), and a lower soil crusher mixing blade (5-3). Each of the upper soil crusher mixing blade (5-1), the middle soil crusher mixing blade (5-2), and the lower soil crusher mixing blade (5-3) is provided with at least two blades, and all three mixing blades are provided with blades. The temperature-controlled water tank (5) is provided with a water inlet (8), and the temperature-controlled water tank (5) is provided with a heater (6). The curing agent in the curing agent mixing chamber (9) includes industrial solid waste, cement-based materials, fibers, composite activators, active materials, and auxiliary agents. Specifically, by weight, the industrial solid waste consists of 0-25 parts, made from one or more of steel slag, fly ash, blast furnace slag, desulfurized gypsum, and alkaline slag; the cement-based materials consist of 0-5 parts, which are sulfoaluminate cement or silicate cement; the fibers consist of 0-0.5 parts, made from one or more of basalt fiber, natural fiber, and modified propylene fiber; the composite activator consists of 0-10 parts, including one or more combinations of sodium sulfate, sodium silicate, sodium hydroxide, and calcium hydroxide; the active materials consist of 0-3 parts, made from one or more of triethanolamine, sodium gluconate, and polycarboxylate superplasticizer; and the auxiliary agents consist of 0-2 parts, including one or more combinations of potassium permanganate, hydrogen peroxide, and Fenton's reagent.

2. The mobile temperature-controlled stirring device according to claim 1, characterized in that, Multiple shock absorbers (19) are provided between the bottom of the solidified soil mixing chamber (15) and the carriage. A weighing sensor is provided on the transmission belt (2). The transmission belt (2) is hinged to the soil mixing chamber (4). A foldable support frame (20) is provided at the bottom of the transmission belt (2).

3. The mobile temperature-controlled stirring device according to claim 1, characterized in that, The curing agent mixing chamber (15) is provided with an upper curing agent mixing paddle (11-1) and a lower curing agent mixing paddle (11-2). There are at least two upper curing agent mixing paddles (11-1) and two lower curing agent mixing paddles (11-2). The upper side of the curing agent mixing chamber (15) is provided with a curing agent inlet (10).

4. The mobile temperature-controlled stirring device according to claim 3, characterized in that, The soil inlet (7-1) and the solidified soil outlet (18) are provided with multi-plate discharge plates. The multi-plate discharge plates are discs composed of multiple conical plates. The side walls of the temperature-controlled water tank (5) and the solidified soil mixing chamber (15) are provided with chutes. The chutes are provided with hydraulic push rods. Each conical plate is located in the chutes and connected to the hydraulic push rods.

5. The mobile temperature-controlled stirring device according to claim 3, characterized in that, The curing agent inlet (7-2), mud inlet (24), fiber inlet (26) and curing agent inlet (25) are all hinged with discharge plates, and the bottom of the curing agent mixing chamber (15) and the top of the solidified soil mixing chamber (15) are all hinged with hydraulic rods corresponding to each discharge plate, and the discharge plate is hinged to its corresponding hydraulic rod.

6. A method of using a portable temperature-controlled stirring device, comprising using the portable temperature-controlled stirring device as described in claim 5, characterized in that, Includes the following steps: Step 1: The engineering waste mud and soil are fed into the soil mixing chamber (4) through the waste mud inlet (3) via the conveyor belt 2 equipped with a weighing sensor. Step 2: Add water to the temperature-controlled water tank (5), and then add water to the soil mixing chamber (4) through the soil inlet (7-1). Turn on the mixing paddle in the soil crusher (4) and work for 5-10 minutes to make the soil and water into mud. Step 3: Add the other raw materials in the curing agent (excluding fiber) into the curing agent mixing chamber (9), and add water to the curing agent mixing chamber (9) through the temperature-controlled water tank (5). Turn on the upper curing agent mixing paddle (11-1) and the lower curing agent mixing paddle (11-2) to fully dissolve and stir the curing agent evenly. Step 4: Add the fiber raw material from the curing agent into the fiber chamber (12) and turn on the cutting machine (14) to cut the fiber; Step 5: Open the mud inlet (24), fiber inlet (26), curing agent inlet (25) and vibrator (17), and close the solidified soil outlet (18) to allow the waste mud, curing agent and fiber to enter the solidified soil mixing chamber (15). Turn on the spiral mixer and stir for 5 to 10 minutes to make fluidized solidified soil. Step 6: Open the solidified soil outlet (18) to discharge the solidified soil. After the discharge is completed, close the spiral mixing paddle, solidified soil outlet (18) and vibrator (17) in the solidified soil mixing chamber (15) to complete the solidified soil discharge.

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