Sanding agent and curing agent for soil solidification and preparation method and device

Abstract

The invention provides a sanding agent for soil solidification, a solidification agent and a preparation method and device. The sanding agent comprises powdery industrial solid waste and silicic acid gel. Mixing the industrial solid waste with the silicic acid gel to form a mixture; wherein the mass ratio of the industrial solid waste to the silicic acid gel is 10: (0.5-3). Based on the fact that the prepared sanding agent is hard particles with different sizes and different shapes, when the sanding agent is mixed with soft foundation soil, clay blocks with high viscosity can be segmented through the characteristic of different rules and friction with the soft foundation soil, and the clay becomes small and thin, so that the clay is fully mixed with the sanding agent. Moreover, the sanding agent is hard particles with different rules, so that the solidified soft foundation soil is not easy to deform when the mixed soil is compacted through the friction force among the particles of the sanding agent and the characteristics of the hard particles of the sanding agent, and the compaction degree, the bearing capacity and the stability of the soft foundation soil are improved; therefore, the solidification effect of the muddy soil is improved.

Description

Technical Field

[0001] The present application relates to the technical field of soil solidification, and in particular to a sandifying agent, a solidifying agent, and a preparation method and a device for soil solidification. Background Art

[0002] Soft foundation soil refers to a soft soil foundation composed of silt, silty soil, organic soil, etc. In engineering construction, it is usually necessary to solidify the soil of the soft foundation in order to achieve the performance indicators required by the project. When solidifying, a soft foundation soil solidifier is usually used for soil solidification. Traditional soil solidifiers can achieve the expected effect when solidifying the soil. However, when facing silty fine-grained soil, the viscosity of the fine-grained soil is high and it is difficult to mix it evenly with the solidifying material, so that the soil that has not come into contact with the solidifying material will liquefy when it comes into contact with water, thereby destroying the bearing capacity and stability of the soil. Therefore, how to provide a solidifying agent that can improve the solidification effect of silty soil has become a problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0003] In view of this, the present application proposes a sandifying agent, a curing agent, and a preparation method and a device for soil solidification, which solves the problem that the solidification effect of silty soil is not strong during soil solidification, and improves the solidification effect of silty soil.

[0004] According to a first aspect of the present application, a sandification agent is provided for consolidating soil, comprising powdered industrial solid waste and silica gel;

[0005] The industrial solid waste is mixed with the silicic acid gel to form a mixture;

[0006] Among them, the mass ratio of the industrial solid waste to the silicate gel is: 10:0.5-3.

[0007] In a possible implementation, the powdered industrial solid waste includes at least one of boiler ash, smelting ball mill slag, high free calcium fly ash, mine tailings, red mud and phosphogypsum.

[0008] In a possible implementation, the silicic acid gel includes sodium silicate, sodium methyl silicate and magnesium fluorosilicate;

[0009] The sodium silicate, sodium methyl silicate and water are mixed to form a sodium silicate composite diluent, which is then mixed with the magnesium fluorosilicate solution to form the silicic acid gel.

[0010] In a possible implementation, the sodium silicate is mixed with the sodium methyl silicate to form a sodium silicate composite dilution solution, and the mixing ratio of the sodium silicate composite dilution solution to the magnesium fluorosilicate solution is 4-6:1.

[0011] According to the second aspect of the present application, a method for preparing a sanding agent is provided, which is used to prepare the sanding agent described in the first aspect of the present application, comprising:

[0012] Mixing the silica gel and the powdered industrial solid waste according to a first preset ratio;

[0013] Among them, the first preset ratio is the mass ratio of industrial solid waste to the silica gel, and the value range is: 10:0.5-3.

[0014] In a possible implementation, the silicic acid gel is prepared by the following method:

[0015] Sodium silicate, the sodium methyl silicate and water are mixed to form a sodium silicate composite dilution solution;

[0016] The sodium silicate composite dilution liquid and the magnesium fluorosilicate solution are mixed by spraying in a second preset ratio to form the silicate gel.

[0017] According to a third aspect of the present application, a device for preparing a sanding agent is provided, comprising:

[0018] The first dilution tank is used to mix sodium silicate, sodium methyl silicate and water to form a sodium silicate composite dilution liquid;

[0019] The second dilution tank: used to form a magnesium fluorosilicate solution;

[0020] Powder tank: used to store the powdered industrial solid waste;

[0021] Mixing bin: used for mixing the sodium silicate composite dilution liquid with the magnesium fluorosilicate solution to form silicate gel, and mixing the formed silicate gel with the industrial solid waste to prepare the sandification agent;

[0022] Wherein, the first dilution tank and the second dilution tank are respectively connected to the mixing bin, and are used to spray the sodium silicate composite dilution liquid and the magnesium fluorosilicate solution into the mixing bin respectively;

[0023] The powder tank is connected to the mixing bin via a powder spraying device and is used for spraying the industrial solid waste into the mixing bin via the powder spraying device.

[0024] In one possible implementation, a first pressure pump is installed between the first dilution tank and the mixing bin, and a second pressure pump is installed between the second dilution tank and the mixing bin; and the first dilution tank and the second dilution tank are connected to the mixing bin through the same injection pipe.

[0025] In a possible implementation, a mixing element is provided in the mixing bin, and the mixing element is located between a connecting pipe through which the first dilution tank and the second dilution tank pass through the mixing bin, and a connecting pipe through which the powder spraying device passes through the mixing bin.

[0026] According to a fourth aspect of the present application, a curing agent is provided, comprising any sanding agent as described in the first aspect of the present application, silicate cement and a water reducing agent;

[0027] Wherein, the mass ratio of the sanding agent is in the range of 5-6;

[0028] The mass ratio of the silicate cement is in the range of 4-5;

[0029] The mass ratio of the water reducing agent ranges from 0.5 to 2.

[0030] In the present application, a sanding agent is used to solidify soil, including powdered industrial solid waste and silica gel; the industrial solid waste is mixed with the silica gel to form a mixture; wherein the mass ratio of the industrial solid waste to the silica gel is: 10:0.5-3. Based on the fact that the prepared sanding agent is hard particles of different sizes and shapes, when mixed with soft soil, through its irregular characteristics, it rubs with the soft soil, and can split the clay blocks with high viscosity, so that the clay becomes smaller and finer, so as to be fully mixed with the sanding agent. Moreover, because the sanding agent itself is a hard particle of different rules, through the friction between the particles of the sanding agent and the characteristics of its own hard particles, when the mixed soil is compacted, the solidified soft soil is not easy to deform, thereby improving the compaction, bearing capacity and stability of the soft soil, so as to achieve the effect of improving the solidification of the soft soil.

[0031] Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the present application and, together with the description, serve to explain the principles of the present application.

[0033] Figure 1 A schematic diagram showing a sanding agent preparation device according to an embodiment of the present application;

[0034] Figure 2 A mesh fan blade structure diagram according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0035] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0036] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0037] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0038] First of all, it should be noted that the sanding agent proposed in the present application and the curing agent prepared based on the sanding agent are designed for the purpose of curing soft soil. Wherein, soft soil refers to soft soil foundation, which belongs to a more common foundation type in engineering construction, and its bearing capacity is low, and its compressibility is high, and it is easy to undergo large settlement and deformation when subjected to pressure. Therefore, it is necessary to solidify it to improve its bearing capacity and stability. In the present application, the soft soil is solidified by physical reaction by mixing the prepared sanding agent or curing agent into the soft soil.

[0039] Specifically, the present application provides a sanding agent for soil solidification, including powdered industrial solid waste and silica gel, and the sanding agent is prepared by mixing the powdered industrial solid waste and silica gel in a ratio of 10:0.5-3. It should be noted here that the sanding agent of the present application is a hard granular structure, and the particles in the sanding agent are of different sizes and shapes. In one implementation, the Mohs hardness of the sanding agent of the present application is: 2-5.

[0040] Thus, the sanding agent of the present application is mixed into the soft soil, and fully stirred, so that the sanding agent particles are fully mixed with the soft soil, and the soft soil is divided and sanded by the friction between the hard particles in the sanding agent and the soft soil with larger viscosity in the soft soil during the stirring and mixing process, thereby reducing the viscosity of the soft soil and making the soft soil with larger viscosity smaller and thinner. At the same time, since the sanding agent of the present application itself is an irregular hard particle, there is also a large friction force between these hard particles. After mixing it with the soft soil, during the compaction process, the hardness of the hard particles of the sanding agent and the friction force between each other can improve the compression resistance, and after compacting with the soft soil, it is not easy to deform, which fundamentally solves the solidification problem of silty fine-grained soil. Wherein, no chemical reaction occurs in this process, and the solidification of the soft soil is achieved entirely by physical reaction, and then the effect of environmental protection is also achieved simultaneously.

[0041] More specifically, in the sanding agent of the present application, the powdered industrial solid waste used may include at least one of boiler ash, smelting ball mill slag, high free calcium fly ash, mine tailings, red mud, and phosphogypsum. That is, in the sanding agent of the present application, its main raw material is powdered industrial solid waste, and these solid wastes are utilized to achieve the purpose of turning waste into treasure, which further reduces the pollution caused to the environment, and at the same time greatly reduces the cost of raw materials and improves the cost performance of the obtained products.

[0042] Among them, when at least one of boiler ash, smelting ball mill slag, high free calcium fly ash, mine tailings, red mud and phosphogypsum is used as industrial solid waste to prepare sanding agent, the component proportions of boiler ash, smelting ball mill slag, high free calcium fly ash, mine tailings, red mud and phosphogypsum can be flexibly set according to actual conditions, and no specific limitation is made here.

[0043] Furthermore, the silica gel includes sodium silicate, sodium methyl silicate and magnesium fluorosilicate. Among them, the silica gel is obtained by mixing sodium silicate, sodium methyl silicate and water to form a sodium silicate composite diluent, and then mixing it with a magnesium fluorosilicate solution. It should be noted that when sodium silicate, sodium methyl silicate and water are mixed to form a sodium silicate composite diluent, the mixing ratio between sodium silicate, sodium methyl silicate and water is: 10-15:1:10-15. The mixing ratio of the sodium silicate composite diluent formed by mixing sodium silicate, sodium methyl silicate and water to the magnesium fluorosilicate solution is 4-6:1. It should be pointed out here that when sodium silicate, sodium methyl silicate and water are mixed to form a sodium silicate composite diluent, the sodium silicate used is liquid sodium silicate with a modulus between 2.2-3.4; sodium methyl silicate is also liquid, and the technical requirements of solid content ≥30 can be used.

[0044] In a possible implementation, after sodium silicate, sodium methyl silicate and water are mixed to form a sodium silicate composite dilution solution, the magnesium fluorosilicate solution can be obtained by diluting the magnesium fluorosilicate when mixed with the magnesium fluorosilicate solution. Specifically, the mixing ratio of magnesium fluorosilicate to water is 1:4-6. Among them, when the magnesium fluorosilicate solution is obtained by diluting the magnesium fluorosilicate, the magnesium fluorosilicate used is an industrial first-grade powdered magnesium fluorosilicate with a purity of not less than 98%.

[0045] Furthermore, the present application also provides a method for preparing a sanding agent, which is used to prepare the above-mentioned sanding agent. The preparation method includes: mixing powdered industrial solid waste and silica gel according to a first preset ratio to obtain a mixture. The first preset ratio is the mass ratio of powdered industrial solid waste to silica gel, and the value range is: 10:0.5-3.

[0046] It should be noted that when the powdered industrial solid waste is mixed with the silica gel in a first preset ratio, the silica gel is formed by spraying and mixing the sodium silicate composite diluent and the magnesium fluorosilicate solution in a second preset ratio. Among them, the sodium silicate composite diluent can be obtained by mixing sodium silicate, sodium methyl silicate and water in a third preset ratio; the magnesium fluorosilicate solution can be obtained by mixing magnesium fluorosilicate and water in a fourth preset ratio. It should be noted here that the second preset ratio is the mass ratio of the sodium silicate composite diluent and the magnesium fluorosilicate solution, and the value range is 4-6:1, the third preset ratio is the mass ratio of sodium silicate, sodium methyl silicate and water, and the value range is 10-15:1:10-15, and the fourth preset ratio is the mass ratio of magnesium fluorosilicate and water, and the value range is 1:4-6. It should be noted that when diluting the above-mentioned sodium silicate and sodium methyl silicate and magnesium fluorosilicate, the dilution environment requires a non-freezing environment, and at the same time, the stirring time during dilution must be no less than the set time threshold. The time threshold can be determined according to actual conditions, with uniform stirring being the standard, and is preferably set to 60 seconds.

[0047] Furthermore, in order to realize the preparation of the above-mentioned sanding agent, the present application also provides a sanding agent preparation device 100, see Figure 1 , including: a first dilution tank 110, used to mix sodium silicate, sodium methyl silicate and water to form a sodium silicate composite dilution liquid; a second dilution tank 120, used to form a magnesium fluorosilicate solution; a powder tank 130: used to store powdered industrial solid waste; a mixing bin 140: used to mix the sodium silicate composite dilution liquid with the magnesium fluorosilicate solution to form a silicate gel, and mix the formed silicate gel with the industrial solid waste to prepare a sanding agent.

[0048] The first dilution tank 110 and the second dilution tank 120 are respectively connected to the mixing bin 140, and are used to spray the sodium silicate composite dilution solution and the magnesium fluorosilicate solution into the mixing bin respectively; the powder tank 130 is connected to the mixing bin 140 through the powder spraying device 150, and is used to spray the powdered industrial solid waste into the mixing bin 140 through the powder spraying device 150. It should be noted that a metering scale is provided at the bottom of the powder tank 130, and the output of the powder is controlled by the metering scale.

[0049] It should also be noted that a first pressure pump 160 is installed between the first dilution tank 110 and the mixing chamber 140, a second pressure pump 170 is installed between the second dilution tank 120 and the mixing chamber 140, and the first dilution tank 110 and the second dilution tank 120 are connected to the mixing chamber 140 through the same nozzle 180. The first pressure pump 160 and the second pressure pump 170 are both metering pumps, and the output of the solution is controlled by the metering pumps.

[0050] Furthermore, a mixing element 190 is provided in the mixing bin 140, and the mixing element is located between the connecting pipe of the first dilution tank 110 and the second dilution tank 120 passing through the mixing bin 140, and the connecting pipe of the powder spraying device 150 passing through the mixing bin 140. Among them, the mixing element 190 includes a mesh fan blade 191 and a motor 192. The motor 192 is used to drive the mesh fan blade 191 to rotate. The mesh fan blade 191 is used to collide and mix the powdered industrial solid waste and sodium silicate composite dilution liquid and magnesium fluorosilicate solution sprayed by the powder spraying device 150 and the nozzle 180 to form particles of different sizes. It should be noted that the rotation speed of the electric mesh fan blade 191 is 30-100 rpm; the height of the nozzle 180 and the powder spraying device 150 is flush with the center of the electric mesh fan blade 191. It should be pointed out here that the nozzle 180 can use a two-fluid air atomizing nozzle, and the liquid flow rate can be selected or replaced according to the actual production volume, and there is no specific limitation.

[0051] It should also be noted that see Figure 2 As shown, the electric mesh fan blade 191 can be selected Figure 2There are two kinds of mesh fan blade structures, the left fan blade structure and the right fan blade structure. The specific mesh fan blade structure can be selected according to the actual situation, and there is no specific limitation. Among them, the left mesh fan blade is a cylindrical column composed of a rotating shaft 210 and 4 upright fan blades 220. The rotating shaft 210 is located at the center of the entire mesh fan blade, and the rotating shaft is vertically connected to the inner wall of the mixing bin upper box. At the same time, the 4 upright fan blades 220 are placed parallel to the rotating shaft 210 and are respectively placed in the front, back, left and right directions of the rotating shaft, and the 4 upright fan blades are connected to the top and bottom of the rotating shaft through two annular bases 230. During actual rotation, the motor 192 drives the upright fan blades 220 connected to the rotating shaft 210 to rotate, so as to achieve the purpose of colliding and mixing the powdered industrial solid waste and sodium silicate composite dilution liquid and magnesium fluorosilicate solution sprayed by the powder spraying equipment 150 and the nozzle 180 through the mesh fan blades.

[0052] The right mesh blades are composed of a rotating shaft 210 and two semicircular mesh blades 240. The rotating shaft 210 is located at the center of the entire blade and is vertically connected to the inner wall of the mixing bin upper box body. The semicircular blades 240 extend outward from the center of the rotating shaft through a plurality of spokes and intersect with the semicircular blades to form mesh blades. The rotating shaft and the mesh blades are connected at the intersection of the mesh blades and the rotating shaft through a ring 250. During actual rotation, the motor 192 drives the semicircular blades 240 connected to the rotating shaft 210 to rotate so as to achieve the purpose of colliding and mixing the powdered industrial solid waste, sodium silicate composite dilution liquid and magnesium fluorosilicate solution sprayed by the powder spraying equipment 150 and the nozzle 180 through the mesh blades.

[0053] It should be noted that when selecting the size of the mesh fan blades 191, the aspect ratio of the mesh fan blades 191 needs to be 2:1, and the distance between the outermost edge of the installed mesh fan blades 191 and the inner wall of the mixing bin 140 needs to be greater than 30 cm.

[0054] A belt conveyor 193 is also placed below the mixing bin 140 to transport the industrial solid waste and silica gel mixture in the mixing bin 140 to the outside of the device.

[0055] When the sanding agent preparation method is performed by the above-mentioned device 100 to prepare the sanding agent, the method includes:

[0056] First, powdered industrial solid waste is weighed and put into the powder tank 130, and at the same time, sodium silicate composite dilution liquid is loaded into the first dilution tank 110, and magnesium fluorosilicate solution is loaded into the second dilution tank 120. The sodium silicate composite dilution liquid is obtained by weighing sodium silicate, sodium methyl silicate and water and mixing them; the magnesium fluorosilicate solution is obtained by weighing magnesium fluorosilicate and water and mixing them.

[0057] Second, start the device 100 and set the rotation speed of the mesh fan blades 191.

[0058] Third, the nozzle 180 sprays the sodium silicate composite dilution solution and the magnesium fluorosilicate solution through the pressure pumps. At the same time, the powder spraying device 150 sprays the powdered industrial solid waste and the mixed solution through the metering scale at the bottom of the powder tank 130 to spray the corresponding powdered industrial solid waste.

[0059] Fourth, the sprayed mixed solution and powdered industrial solid waste are formed into particles of different sizes by the rotation of the mesh fan blades 191 and fall onto the belt conveyor 193 below. The belt conveyor 193 sends it out of the device for natural stacking. After stacking for 24 hours, sanded materials, i.e., sanding agents, can be obtained. It should be noted that when particles of different sizes are formed by the rotation of the mesh fan blades 191, the mixture falls quickly due to the fast rotation speed of the mesh fan blades, and it is not easy to form a cumulative amount. At this time, the particles formed are small. When the rotation speed is slow, the mixture starts to fall when it accumulates to a certain amount. At this time, the particles formed are large. Therefore, particles of different sizes can be formed by the rotation of the mesh fan blades.

[0060] Based on the obtained sanding agent, the present application also provides a curing agent for soil solidification, including: the above-prepared sanding agent, water reducing agent and silicate cement. Therefore, when the curing agent of the present application is mixed with soft soil for soil solidification, due to the characteristics of the sanding agent in the curing agent having hard particles of different sizes and shapes, the clay blocks with large viscosity of the soft soil can be divided, so that the soft soil and the sanding agent are fully mixed. Moreover, the sanding agent is a characteristic of irregular hard particles, and there is a large friction between each particle, which is not easy to cause deformation when the soil is compacted, thereby improving the compressive strength of the soft soil. Therefore, the curing agent made of the sanding agent as the main component can also improve the compressive strength of the soft soil in the same way, thereby improving the curing effect of the soft soil, so as to achieve the purpose of soil solidification.

[0061] It should be noted that the curing agent of the present application is obtained by mixing a sanding agent, a water reducing agent and silicate cement. When the sanding agent, the water reducing agent and silicate cement are mixed, the mass ratio of the sanding agent is in the range of 5-6, the mass ratio of the silicate cement is in the range of 4-5, and the mass ratio of the water reducing agent is in the range of 0.5-2.

[0062] It should be noted that, in the curing agent of the present application, the water reducing agent used includes at least one of sodium methylene dinaphthalene sulfonate and sodium polycarboxylate.

[0063] Furthermore, when preparing a curing agent for soil curing, the corresponding sanding agent, silicate cement and water reducer are weighed according to the fifth preset ratio, and then the weighed sanding agent, silicate cement and water reducer are mixed to obtain the curing agent. Among them, the fifth preset ratio is the mass ratio of the sanding agent, silicate cement and water reducer, and the value range is 5-6:4-5:0.5-2. It should be noted that when preparing a curing agent for soil curing, the water reducer used can include at least one of sodium methylene dinaphthalene sulfonate and sodium polycarboxylate, and there is no specific limitation.

[0064] Based on the prepared sanding agent and curing agent, the sanding agent and curing agent for soil curing of the present application are described in detail below in combination with specific embodiments.

[0065] The powdered industrial solid waste used in the embodiment is boiler ash, and the water reducing agent is sodium methylene dinaphthalene sulfonate.

[0066] Embodiment 1:

[0067] Prepare sanding agent 1, weigh 1000 kg powdered boiler ash, 160 kg sodium silicate composite dilution liquid, 40 kg magnesium fluorosilicate solution, start the device, the electric mesh fan speed is 50 rpm, and the nozzle sprays the powder and the mixed solution to make sanding agent 1.

[0068] When the soil is solidified in this embodiment, the prepared sanding agent 1 is placed for 24 hours, and the Mohs strength of the sanding agent 1 is 2.2, and the particles of the sanding agent 1 with a particle size of 1 mm-5 mm account for 93.4%. 10 kg of soft soil with a compressive strength of 0.3 MPa and a water stability coefficient of 0.4 is weighed, and 1 kg of the sanding agent 1 is weighed. The sanding agent 1 and the soft soil are mixed, and the compressive strength of the mixed soft soil is measured to be 0.61 MPa, and the water stability coefficient is 0.56.

[0069] Example 2

[0070] Prepare sanding agent 2, weigh 1000kg powdered boiler ash, 200kg sodium silicate composite dilution liquid, 50kg magnesium fluorosilicate solution, start the device, the electric mesh fan speed is 50 rpm, the nozzle sprays the powder and the mixed solution to make sanding agent 2.

[0071] When the soil is solidified in this embodiment, the prepared sanding agent 2 is placed for 24 hours, and the Mohs strength of the sanding agent 2 is 2.8, and the particles of the sanding agent 2 with a particle size between 1 mm and 5 mm account for 95.7%.

[0072] Weigh 10 kg of soft soil with a compressive strength of 0.3 MPa and a water stability coefficient of 0.4, weigh 1 kg of sandifier 2, mix the sandifier 2 and the soft soil, and measure the compressive strength of the mixed soft soil to be 0.76 MPa and the water stability coefficient to be 0.61.

[0073] Example 3

[0074] Prepare sanding agent 3, weigh 1000 kg powdered boiler ash, 240 kg sodium silicate composite dilution liquid, 60 kg magnesium fluorosilicate solution, start the device, the speed of the electric mesh fan is 50 rpm, and the nozzle sprays the powder and the mixed solution to make sanding agent 3.

[0075] When the soil is solidified in this embodiment, the prepared sanding agent 3 is placed for 24 hours, and the Mohs strength of the sanding agent 3 is 3.6, and the particles of the sanding agent 3 with a particle size between 1 mm and 5 mm account for 96.8%.

[0076] Weigh 10 kg of soft soil with a compressive strength of 0.3 MPa and a water stability coefficient of 0.4, weigh 1 kg of sandifier 3, mix the sandifier 3 and the soft soil, and measure the compressive strength of the mixed soft soil to be 0.85 MPa and the water stability coefficient to be 0.64.

[0077] Example 4

[0078] To prepare a curing agent 1, 5 kg of a sanding agent 1, 5 kg of 42.5 silicate cement, and 0.5 kg of a water reducing agent were weighed and mixed to obtain a curing agent 1.

[0079] When the soil is solidified in this embodiment, 10 kg of soft soil with a compressive strength of 0.3 MPa and a water stability coefficient of 0.4 is weighed, 1 kg of curing agent 1 is weighed, and the curing agent 1 and the soft soil are mixed. The compressive strength of the soft soil after mixing is measured to be 0.76 MPa, and the water stability coefficient is 0.82.

[0080] Example 5

[0081] To prepare curing agent 2, 6 kg of sanding agent 1, 4 kg of silicate cement of model 42.5, and 0.5 kg of water reducing agent were weighed and mixed to obtain curing agent 2.

[0082] When the soil is solidified in this embodiment, 10 kg of soft soil with a compressive strength of 0.3 MPa and a water stability coefficient of 0.4 is weighed, 1 kg of curing agent 2 is weighed, and the curing agent 2 and the soft soil are mixed. The compressive strength of the soft soil after mixing is measured to be 0.79 MPa, and the water stability coefficient is 0.75.

[0083] Example 6

[0084] To prepare curing agent 3, 5 kg of sanding agent 3, 5 kg of silicate cement of model 42.5, and 0.5 kg of water reducing agent were weighed and mixed to obtain curing agent 3.

[0085] When the soil is solidified in this embodiment, 10 kg of soft soil with a compressive strength of 0.3 MPa and a water stability coefficient of 0.4 is weighed, 1 kg of curing agent 3 is weighed, and the curing agent 3 and the soft soil are mixed. The compressive strength of the soft soil after mixing is measured to be 1.25 MPa, and the water stability coefficient is 0.92.

[0086] Table 1 Statistical table of soft soil stabilization test results

[0087] Example mixture Compressive strength / Mpa Water stability factor Comparative Example Soft soil 0.3 0.4 Example 1 Sanding agent 1 mixed with soft soil 0.61 0.56 Example 2 Sanding agent 2 mixed with soft soil 0.76 0.61 Example 3 Sanding agent 3 mixed with soft soil 0.85 0.64 Example 4 Mix the solidifying agent 1 with the soft soil 0.76 0.82 Example 5 Mix the solidifying agent 2 with the soft soil 0.79 0.75 Example 6 Mix the curing agent 3 with the soft soil 1.25 0.92

[0088] Referring to Table 1, a statistical table of the results of the soil solidification experiments of the sandifiers and curing agents of Examples 1 to 6 of the present application is shown. In the above embodiments, the soil compressive strength measured after the sandifiers, curing agents and soft soils are mixed and solidified is compared with the compressive strength of the original soft soil. The sandifiers and curing agents prepared in the present application effectively improve the compressive strength and water stability coefficient of the soft soil during soil solidification. Therefore, the sandifiers and curing agents prepared in the present application can effectively improve the curing effect of the soft soil.

[0089] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A sanding agent, characterized in that: For soil stabilization, including powdered industrial solid waste and silica gel; The industrial solid waste is mixed with the silicic acid gel to form a mixture; Among them, the mass ratio of the industrial solid waste to the silicate gel is: 10:0.5-3.

2. The sanding agent according to claim 1, characterized in that: The powdered industrial solid waste includes at least one of boiler ash, smelting ball mill slag, high free calcium fly ash, mine tailings, red mud and phosphogypsum.

3. The sanding agent according to claim 1, characterized in that: The silicic acid gel comprises sodium silicate, sodium methyl silicate and magnesium fluorosilicate; The sodium silicate, sodium methyl silicate and water are mixed to form a sodium silicate composite diluent, which is then mixed with the magnesium fluorosilicate solution to form the silicic acid gel.

4. The sanding agent according to claim 3, characterized in that: The sodium silicate is mixed with the sodium methyl silicate to form a sodium silicate composite dilution solution, and the mixing ratio of the sodium silicate composite dilution solution to the magnesium fluorosilicate solution is 4-6:

1.

5. A method for preparing a sanding agent, characterized in that: The sanding agent for preparing any one of claims 1 to 4 comprises: Mixing the silica gel and the powdered industrial solid waste according to a first preset ratio; Among them, the first preset ratio is the mass ratio of industrial solid waste to the silica gel, and the value range is: 10:0.5-3.

6. The method according to claim 5, characterized in that The silicic acid gel is prepared by the following method: Sodium silicate, the sodium methyl silicate and water are mixed to form a sodium silicate composite dilution solution; The sodium silicate composite dilution liquid and the magnesium fluorosilicate solution are mixed by spraying in a second preset ratio to form the silicate gel.

7. A sanding agent preparation device, characterized in that: include; The first dilution tank is used to mix sodium silicate, sodium methyl silicate and water to form a sodium silicate composite dilution liquid; The second dilution tank: used to form a magnesium fluorosilicate solution; Powder tank: used to store the powdered industrial solid waste; Mixing bin: used for mixing the sodium silicate composite dilution liquid with the magnesium fluorosilicate solution to form silicate gel, and mixing the formed silicate gel with the industrial solid waste to prepare the sandification agent; Wherein, the first dilution tank and the second dilution tank are respectively connected to the mixing bin, and are used to spray the sodium silicate composite dilution liquid and the magnesium fluorosilicate solution into the mixing bin respectively; The powder tank is connected to the mixing bin via a powder spraying device and is used for spraying the industrial solid waste into the mixing bin via the powder spraying device.

8. The device according to claim 7, characterized in that A first pressure pump is installed between the first dilution tank and the mixing bin, and a second pressure pump is installed between the second dilution tank and the mixing bin; and the first dilution tank and the second dilution tank are connected to the mixing bin through the same injection pipeline.

9. The device according to claim 7 or 8, characterized in that A mixing element is arranged in the mixing bin, and the mixing element is located between a connecting pipe through which the first dilution tank and the second dilution tank pass through the mixing bin, and a connecting pipe through which the powder spraying equipment passes through the mixing bin.

10. A curing agent, characterized in that The method comprises the sanding agent according to any one of claims 1 to 4, silicate cement and a water reducing agent; Wherein, the mass ratio of the sanding agent is in the range of 5-6; The mass ratio of the silicate cement is in the range of 4-5; The mass ratio of the water reducing agent ranges from 0.5 to 2.

Images