Soil stabilizer, preparation method therefor, and application thereof

Abstract

Provided are a soil stabilizer, a preparation method therefor, and an application thereof. The soil stabilizer is prepared from an impact-resistant mixed additive consisting of humic acid, an initiator, butyl acrylate, styrene, acrylic acid, an emulsifier, and a surfactant, and from a reinforcing agent consisting of a granular industrial waste residue mixture, silicate, a water-reducing agent, an anti-cracking agent, a freeze-thaw resistant compounded powder mixture, lime, and gypsum. The soil stabilizer is added to road soil, improving the compressive strength and the freeze-thaw fatigue resistance of said soil and preventing the seasonal freeze-thaw thereof, thereby improving the safety of roads affected by seasonal freeze-thaw. The stable product components also improve the shelf life and transportability of the stabilizer, allowing the soil stabilizer to have better application prospects.

Description

Soil solidifying agent, preparation method and application thereof

[0001] Cross-reference to related applications

[0002] This application claims priority to the Chinese patent application No. 202410638959.1, filed on May 22, 2024, and entitled "Soil solidifying agent, preparation method and application thereof", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of soil improvement, in particular to a soil solidifying agent, a preparation method and application thereof. BACKGROUND

[0004] Seasonal frozen soil generally refers to soil (rock) that freezes in winter and melts completely in summer, including seasonal frozen layer and seasonal thawing layer (also known as active layer). The freezing and thawing cycle in the seasonal frozen soil area has a very significant impact on road engineering quality. The seasonal freezing and thawing process leads to a decrease in roadbed strength during spring thawing period. With global warming, some permanent frozen soil will change to seasonal frozen soil, leading to a continuous increase in the area of seasonal frozen soil.

[0005] The mine road located in the seasonal frozen area not only faces the problem of seasonal freezing and thawing, but also faces the huge impact of heavy vehicle traffic. In the prior art, many solidifying agents have poor impact resistance or frost resistance, or cannot simultaneously meet the requirements. When used in high-cold mine roads, unexpected situations may occur during the spring thawing period, affecting safety. SUMMARY

[0006] Therefore, the present application provides a soil solidifying agent, a preparation method and application thereof to solve the problem that the soil solidifying agent in the prior art has poor impact resistance or frost resistance, or cannot simultaneously have impact resistance and frost resistance. Especially when used in high-cold mine roads, the seasonal freezing and thawing of road soil may reduce the quality of road use, and the traffic of heavy vehicles in the spring thawing period may cause unexpected situations to occur, affecting the safety during use.

[0007] In a first aspect, the present application provides a soil solidifying agent having excellent compressive strength and freeze-thaw fatigue resistance.

[0008] The soil solidifying agent is composed of an impact-resistant mixed additive and a reinforcing agent;

[0009] The impact-resistant mixed additive includes the following components by weight: 200-220 parts of humic acid, 15-20 parts of an initiator solution, 480-520 parts of butyl acrylate, 100-120 parts of styrene, 20-40 parts of acrylic acid, 8-15 parts of an emulsifier, and 3-5 parts of a surfactant.

[0010] Optionally, the impact-resistant mixed additive further comprises deionized water, and the amount of the deionized water added is 150-170 parts by weight.

[0011] The reinforcing agent comprises the following ingredients by weight: industrial solid waste residue particle mixture 500-700 parts, silicate 20-50 parts, water reducing agent 10-15 parts, anti-cracking agent 20-30 parts, anti-freeze-thaw compound mixed powder 20-25 parts, lime 15-20 parts, and gypsum 30-75 parts.

[0012] In an optional embodiment, the reinforcing agent satisfies any one or more of the following A-D:

[0013] A: the anti-cracking agent is composed of 80-120 parts by weight of glass fiber powder, 100-120 parts by weight of calcium carbonate, and 50 parts by weight of ethanol;

[0014] B: the anti-freeze-thaw compound mixed powder comprises the following raw materials: 15-25 parts by weight of ammonium chloride, 120-180 parts by weight of aqueous epoxy resin solution, 80-120 parts by weight of waste asphalt, and 30-50 parts by weight of anionic emulsifier particle powder;

[0015] C: the industrial solid waste residue particle mixture is one or more of metallurgical waste residue, mining waste residue, fuel waste residue, and chemical waste residue;

[0016] Optionally, the water content of the industrial solid waste residue particle mixture is less than 1wt%;

[0017] Optionally, the specific surface area of the industrial solid waste residue particle mixture is 500-600 m 2 / kg;

[0018] D: the water reducing agent is one or more of aminosulfonate-based high-efficiency water reducing agent, powder polycarboxylate, and naphthalene sulfonate water reducing agent.

[0019] In an optional embodiment, in the impact-resistant mixed additive,

[0020] The initiator solution is an APS aqueous solution, and optionally the content of APS is 55-65wt.%;

[0021] And / or, the emulsifier is DNS-86.

[0022] In a second aspect, the application provides a preparation method of the soil stabilizer, and the preparation method comprises the following steps:

[0023] S1: mixing butyl acrylate, styrene, and acrylic acid to form a mixture A;

[0024] S2: drop the mixture A obtained in step S1 into a mixture containing emulsifier DNS-86 and surfactant to form a pre-emulsion B;

[0025] S3: add humic acid, deionized water and initiator solution into the pre-emulsion B obtained in step S2 to form an impact-resistant mixed additive;

[0026] S4: mix all raw materials of the impact-resistant mixed additive and reinforcing agent obtained in step S3 to obtain the soil solidifying agent;

[0027] Optionally, the stirring speed is 295 r / min and the stirring time is 80 min.

[0028] In an alternative embodiment, in step S3, first add humic acid and deionized water into the pre-emulsion B, stir and heat to 60-78℃, drop the initiator solution while stirring and heating to 83-87℃, continue stirring and heating to 90-94℃ after dropping, continue to react and then filter to form the impact-resistant mixed additive;

[0029] Optionally, the stirring and heating speed is 1-3℃ per minute to 60-78℃; or the stirring and heating speed is 2℃ per minute to 60-78℃;

[0030] Optionally, the dropping time of the initiator solution is 2-3 hours;

[0031] In an alternative embodiment, continue to react for 25-35 minutes after heating to 90-94℃, then cool to 70-74℃ for 25-35 minutes, and finally cool and filter;

[0032] Optionally, the filtering is performed by using a filter membrane with a pore size of 60-80 mesh;

[0033] Optionally, the cooling is to 20-30℃.

[0034] In an alternative embodiment, the pH of the pre-emulsion B is 8-9;

[0035] Optionally, an alkaline adjusting agent is used to adjust the pH of the pre-emulsion B;

[0036] Optionally, the alkaline adjusting agent is saturated sodium hydroxide solution.

[0037] In an alternative embodiment, the reinforcing agent includes industrial solid waste residue particle mixture, silicate, water reducing agent, anti-cracking agent, anti-freeze-thaw compound mixed powder, lime and gypsum;

[0038] The preparation method of the anti-freezing and thawing compound mixed powder comprises: mixing ammonium chloride, aqueous epoxy resin solution, waste asphalt and anionic emulsifier particle powder and reacting at 150-200 DEG C for 3-5 hours to obtain the anti-freezing and thawing compound mixed powder.

[0039] And / or, the industrial solid waste residue particle mixture is ground before being added.

[0040] Optionally, the grinding is to a specific surface area of 500-600 m 2 / kg, and the grinding time is 110-130 min.

[0041] Optionally, the silicate, water reducing agent, anti-cracking agent, anti-freezing and thawing compound mixed powder, lime and gypsum are also ground before being used.

[0042] In a third aspect, the application provides application of the soil solidifying agent in road engineering.

[0043] In an optional embodiment, the road is a mine road in an alpine region.

[0044] In a fourth aspect, the application provides a road base material, which comprises the soil solidifying agent, and the addition amount of the soil solidifying agent is 4-6% of the weight of the road base material.

[0045] Advantages of the application:

[0046] The application prepares a soil solidifying agent by using an impact resistance mixed additive composed of humic acid, initiator, butyl acrylate, styrene, acrylic acid, emulsifier and surfactant and a reinforcing agent composed of an industrial solid waste residue particle mixture, silicate, water reducing agent, anti-cracking agent, anti-freezing and thawing compound mixed powder, lime and gypsum, and adds the soil solidifying agent into road soil, thereby improving the compressive strength and freeze-thaw fatigue resistance of the road soil, preventing seasonal freeze-thaw of the road soil, and improving the safety of the seasonal freeze-thaw road. The product components are stable, and the storage and transportation resistance of the solidifying agent is also improved, so that the soil solidifying agent has a better application prospect. DETAILED DESCRIPTION

[0047] The following examples are provided to better further understand the application and are not limited to the best mode, and do not limit the content and protection scope of the application. Any person who obtains any product same or similar to the application under the enlightenment of the application or by combining the application with other prior art features falls within the protection scope of the application.

[0048] Unless otherwise specified or contradictory, the terms or phrases used in the present application have the following meanings:

[0049] In the present application, the selection range related to "and / or" includes any one of two or more related listed items, and also includes any and all combinations of the related listed items, such as "A and / or B" includes three parallel schemes of A, B and A+B.

[0050] In the present application, the terms "multiple", "various" and the like, if not specifically limited, refer to greater than or equal to two in quantity. For example, "one or more" means one or more than two.

[0051] In the present application, the terms "further", "furthermore", "in particular" and the like are used for the purpose of description, indicating differences in content, but should not be understood as limiting the scope of protection of the present application.

[0052] In the present application, the terms "optionally", "optional" and "optional" mean that it can or can not exist, that is, it means to select from any one of the two parallel schemes of "yes" or "no". If there are multiple "options" in a technical solution, if not specifically stated, and there is no contradictory relationship or mutual restriction, each "option" is independent.

[0053] In the present application, in the terms "first aspect", "second aspect", "third aspect", "fourth aspect" and the like, the terms "first", "second", "third", "fourth" and the like are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or quantity, nor can it be understood as implicitly indicating the importance or quantity of the indicated technical features. Moreover, "first", "second", "third", "fourth" and the like only serve the purpose of non-exhaustive enumeration description, and should be understood as not constituting a closed limitation on the quantity.

[0054] In the present application, the technical features described in an open manner include both the closed technical solution composed of the listed features and the open technical solution containing the listed features.

[0055] The specific experimental steps or conditions not mentioned in the examples can be carried out according to the conventional experimental steps described in the literature in the art. The reagents or instruments not marked with the manufacturer are conventional reagent products that can be obtained by purchase.

[0056] When used in high-cold mine roads, the road soil will undergo seasonal freezing and thawing, reducing the quality of the road. Heavy vehicles passing through in the spring thawing period may cause unexpected situations to occur, affecting the safety of use. In order to avoid the seasonal freezing and thawing of the road soil, the present application provides a soil stabilizer.

[0057] In some specific embodiments, a soil stabilizer is composed of impact-resistant mixed additives and reinforcing agents;

[0058] The anti-impact mixed additive comprises the following components by weight parts: 200-220 parts of humic acid, 15-20 parts of initiator solution, 480-520 parts of butyl acrylate, 100-120 parts of styrene, 20-40 parts of acrylic acid, 8-15 parts of emulsifier and 3-5 parts of surfactant.

[0059] The anti-impact mixed additive is composed of humic acid, initiator, butyl acrylate, styrene, acrylic acid, emulsifier and surfactant; the humic acid in the application is extracted from lignite according to a conventional method, for example, the lignite is ground into powder, and then extracted with an alkaline or acidic solution, and finally the humic acid is obtained through repeated extraction, concentration and drying. The surfactant is specifically a polymerizable surfactant with emulsifying function, for example, the surfactant can be ANPEO10 or ANPEO10-P1, and optionally ANPEO10.

[0060] Optionally, the anti-impact mixed additive further comprises deionized water, and the addition amount of the deionized water is 150-170 parts.

[0061] The reinforcing agent comprises the following components by weight parts: 500-700 parts of industrial solid waste slag particle mixture, 20-50 parts of silicate, 10-15 parts of water reducing agent, 20-30 parts of anti-cracking agent, 20-25 parts of anti-freeze-thaw compound mixed powder, 15-20 parts of lime and 30-75 parts of gypsum.

[0062] The reinforcing agent is composed of industrial solid waste slag particle mixture, silicate, water reducing agent, anti-cracking agent, anti-freeze-thaw compound mixed powder, lime and gypsum.

[0063] The application prepares a soil solidifying agent by the anti-impact mixed additive composed of humic acid, initiator, butyl acrylate, styrene, acrylic acid, emulsifier and surfactant and the reinforcing agent composed of industrial solid waste slag particle mixture, silicate, water reducing agent, anti-cracking agent, anti-freeze-thaw compound mixed powder, lime and gypsum, and adds it into road soil, thereby improving the compressive strength and freeze-thaw fatigue resistance of the road soil, preventing the seasonal freeze-thaw of the road soil, and improving the safety of the seasonal freeze-thaw road. The product components are stable, and the storage and transportation resistance of the solidifying agent in the application is also improved, so that the soil solidifying agent has a better application prospect.

[0064] In the present application, acrylic acid and acrylic ester are selected as monomers for graft copolymerization with natural product humic acid, a high-molecular graft copolymer emulsion with a cross-linked network structure is prepared, and after the emulsion is mixed with industrial solid waste and other raw materials, the prepared soil stabilizer has excellent dynamic stability and uniform dispersion, so that the soil stabilizer is more stable during use, and will not be easily damaged and cracked when heavy vehicles pass on the road, thereby increasing the overall firmness and impact resistance of the soil stabilizer.

[0065] The reinforcing agent is selected from industrial solid waste slag particle mixture, silicate, water reducing agent, anti-cracking agent, anti-freezing and thawing compound mixture powder, lime and gypsum, the anti-freezing and thawing property and bonding performance of the anti-freezing and thawing compound mixture powder make the network structure of the impact-resistant mixed additive more firm; and by using the water reducing agent and the anti-cracking agent, the industrial solid waste slag particle mixture and the impact-resistant mixed additive form a structure with certain elasticity, and the lime and the gypsum with different particle sizes from the industrial solid waste slag particle mixture form a soil stabilizer structure with elasticity and stability.

[0066] In some embodiments, the reinforcing agent satisfies any one or more of A-D as follows:

[0067] A: the anti-cracking agent is composed of 80-120 parts by weight of glass fiber powder, 100-120 parts by weight of calcium carbonate and 50 parts by weight of ethanol;

[0068] B: the anti-freezing and thawing compound mixture powder includes the following raw materials: 15-25 parts by weight of ammonium chloride, 120-180 parts by weight of aqueous epoxy resin solution, 80-120 parts by weight of waste asphalt and 30-50 parts by weight of anionic emulsifier particle powder;

[0069] C: the industrial solid waste slag particle mixture is one or more of metallurgical slag, mining slag, fuel slag and chemical slag;

[0070] Optionally, the water content of the industrial solid waste slag particle mixture is less than 1wt%;

[0071] Optionally, the specific surface area of the industrial solid waste slag particle mixture is 500-600m 2 / kg;

[0072] D: the water reducing agent is one or more of aminosulfonate-based high-efficiency water reducing agent, powder polycarboxylate and naphthalene sulfonate water reducing agent.

[0073] The anti-freezing and thawing compound mixed powder of the present application selects ammonium chloride, aqueous epoxy resin solution, waste asphalt and anionic emulsifier particle powder as raw materials, adds the aqueous epoxy emulsified waste asphalt as an anti-impact mixed additive on the basis of the anti-impact mixed additive, so that the soil stabilizer relies on the waste asphalt, the excellent low temperature performance cooperates with the excellent bonding strength of the epoxy emulsion, so that the soil stabilized material has better compressive strength and freeze-thaw fatigue resistance, so that the freeze-thaw phenomenon does not easily occur, further increasing the stability of the present stabilizer in use.

[0074] The solid content of the aqueous epoxy resin solution of the present application is 48-52wt.%, the epoxy equivalent (solid fraction) is 220-280; the viscosity (25℃) is 100-450mpa·s; the pH value is 2-7; the specific gravity is 1.01-1.08. The waste asphalt is asphalt concrete waste; the anionic emulsifier particle powder can include sodium oleate, sodium abietate, sodium laurate and / or sodium naphthenate;

[0075] In some embodiments, the anti-impact mixed additive,

[0076] The initiator solution can be an aqueous ammonium persulfate solution, an aqueous sodium persulfate solution or an aqueous potassium persulfate solution, and can be an aqueous ammonium persulfate solution (APS aqueous solution), and the APS content in the aqueous ammonium persulfate solution is 55-65wt.%.

[0077] And / or, the emulsifier is DNS-86 or ANPEO10-P1, and can be DNS-86.

[0078] Ammonium persulfate (abbreviated as APS, trade name as ammonium persulfate) is a crystalline salt of peroxodisulfate, which is a strong oxidizing agent and a polymerization initiator.

[0079] The surfactant and emulsifier DNS-86 in the present application are purchased from Hanko Chemical Technology Co., Ltd.

[0080] The amino sulfonate-based superplasticizer (abbreviated as ASP) has strong water-reducing and dispersing effect, which can ensure that the concrete still has good workability at low water-cement ratio, so the amino sulfonate-based superplasticizer has higher water-reducing rate and stronger dispersing effect than naphthalene-based and melamine-based superplasticizers. ASP can significantly reduce the loss of road surface slump.

[0081] In some embodiments, a preparation method of the soil stabilizer is provided, and the preparation method comprises the following steps:

[0082] S1: mixing butyl acrylate, styrene and acrylic acid to form a mixture A;

[0083] S2: drop the mixture A obtained in step S1 into a mixture containing emulsifier DNS-86 and surfactant to form a pre-emulsion B;

[0084] S3: add humic acid, deionized water and initiator solution to the pre-emulsion B obtained in step S2 to form an impact-resistant mixed additive;

[0085] S4: mix all raw materials of the impact-resistant mixed additive and reinforcing agent obtained in step S3 to obtain the soil solidifying agent;

[0086] Optionally, the stirring speed is 295 r / min and the stirring time is 80 min.

[0087] Too fast stirring speed will cause too high temperature, affecting product properties, and too slow stirring speed and too short time cannot stir to uniform state.

[0088] In some embodiments, in step S3, first add humic acid and deionized water to the pre-emulsion B, stir and heat to 60-78℃, drop the initiator solution while stirring and heating to 83-87℃, continue stirring and heating to 90-94℃ after dropping is completed, continue to react and then filter to form the impact-resistant mixed additive;

[0089] Optionally, heat to 60-78℃ at a speed of 1-3℃ per minute; optionally heat to 60-78℃ at a speed of 1℃ or 2℃ or 3℃ per minute;

[0090] Optionally, the time for dropping the initiator solution is 2-3 hours;

[0091] In some embodiments, continue to react for 25-35 minutes after heating to 90-94℃, then cool to 70-74℃ and keep for 25-35 minutes, and finally cool, filter;

[0092] Optionally, the filtering is performed by using a filter membrane with a pore size of 0.125 mm;

[0093] Optionally, cool to 20-30℃.

[0094] In some embodiments, the pH in the pre-emulsion B is 8-9;

[0095] Most anionic emulsifiers require to be used under alkaline conditions, and pH is the most important factor affecting emulsification effect, and suitable pH value can improve emulsification capacity and reduce dosage; filtering the impact-resistant mixed additive before use and then reacting with the reinforcing agent can improve the initiation efficiency.

[0096] Optionally, use an alkaline adjusting agent to adjust the pH of the pre-emulsion B;

[0097] Optionally, the alkaline adjusting agent is saturated sodium hydroxide solution.

[0098] In some embodiments, the reinforcing agent comprises industrial solid waste residue particle mixture, silicate, water reducing agent, anti-cracking agent, anti-freeze-thaw compound mixed powder, lime and gypsum;

[0099] The preparation method of the anti-freeze-thaw compound mixed powder comprises: mixing ammonium chloride, aqueous epoxy resin solution, waste asphalt and anionic emulsifier particle powder and reacting at 150-200℃ for 3-5 hours to obtain the anti-freeze-thaw compound mixed powder.

[0100] Optionally, the industrial solid waste residue particle mixture is ground before being added.

[0101] Optionally, the grinding is performed to a specific surface area of 500-600m 2 / kg and a grinding time of 110-130 minutes.

[0102] Optionally, the silicate, water reducing agent, anti-cracking agent, anti-freeze-thaw compound mixed powder, lime and gypsum are also ground before being used, to a specific surface area of 500-600m 2 / kg and a particle size of <50μm.

[0103] The particle size and dispersibility index of the raw materials of the present application are small, and the soil solidifying agent obtained by mixing the reinforcing agent and the impact-resistant mixed additive is less likely to form large cavities, thereby improving the overall firmness and impact resistance of the soil solidifying agent.

[0104] In some embodiments, the application also provides a use of the soil solidifying agent in road engineering, and the road is a mine road in an alpine region.

[0105] In some embodiments, the application also provides a road base material, and the road base material comprises the soil solidifying agent, and the added amount of the soil solidifying agent is 4-6% of the weight of the road base material.

[0106] The present application will be further described in detail below in combination with specific embodiments, which should not be understood as limiting the scope of the present application.

[0107] Embodiment 1

[0108] The present embodiment provides a soil solidifying agent, which is composed of impact-resistant mixed additive and reinforcing agent, and comprises the following components:

[0109] The anti-impact mixed additive is composed of 210 kg of peat humic acid, 18 kg of sodium persulfate aqueous solution (initiator), 500 kg of butyl acrylate, 110 kg of styrene, 30 kg of acrylic acid, 11 kg of DNS-86 (emulsifier), 160 kg of deionized water, and 4 kg of ANPEO10-P1 (surfactant);

[0110] The reinforcing agent is composed of 600 kg of industrial solid waste slag particle mixture, 35 kg of silicate, 12.5 kg of water reducing agent, 25 kg of anti-cracking agent, 23 kg of anti-freeze-thaw compound mixed powder, 18 kg of lime, and 55 kg of gypsum.

[0111] The anti-cracking agent powder preparation is composed of 100 kg of glass fiber powder, 110 kg of calcium carbonate, and 50 kg of ethanol;

[0112] The anti-freeze-thaw compound mixed powder includes 20 kg of ammonium chloride powder preparation, 150 kg of room temperature state aqueous epoxy resin solution, 100 kg of hot waste asphalt, and 40 kg of anionic emulsifier particle powder (sodium oleate).

[0113] The anti-impact mixed additive and the reinforcing agent are mixed to form a soil solidifying agent.

[0114] Example 2

[0115] The present embodiment provides a soil solidifying agent composed of an anti-impact mixed additive and a reinforcing agent, including the following ingredients:

[0116] The anti-impact mixed additive includes 200 kg of lignite humic acid and 150 kg of deionized water, 18 kg of initiator APS aqueous solution, 480 kg of butyl acrylate, 100 kg of styrene, 20 kg of acrylic acid, 8 kg of ANPEO10-P1 (emulsifier), and 3 kg of ANPEO10 (surfactant);

[0117] The reinforcing agent includes: industrial solid waste slag particle mixture 500 kg, silicate powder preparation 20 kg, water reducing agent 10 kg, anti-cracking agent powder preparation 20 kg, anti-freeze-thaw compound mixed powder 20 kg, lime fine powder 15 kg, and blocky gypsum raw material 30 kg;

[0118] The anti-cracking agent powder preparation is composed of 100 kg of glass fiber powder, 110 kg of calcium carbonate, and 50 kg of ethanol;

[0119] The anti-freeze-thaw compound mixed powder includes 20 kg of ammonium chloride powder preparation, 150 kg of room temperature state aqueous epoxy resin solution, 100 kg of hot waste asphalt, and 40 kg of anionic emulsifier particle powder (a mixture of sodium oleate, sodium abietate, sodium laurate, and sodium naphthenate).

[0120] The soil solidifying agent is prepared according to the following method:

[0121] S1: First, the preparation of the impact-resistant mixing additive is carried out, and the following are weighed: butyl acrylate, styrene and acrylic acid, and the weighed substances are fully mixed to obtain a mixture A;

[0122] S2: The mixture A is added dropwise to a two-mixture containing emulsifier particle powder DNS-86 and ANPEO10, after adjusting the pH value to 8 using a pH adjuster, dispersion is carried out for 5 minutes using a handheld homogenizer, and finally a stable pre-emulsion B is obtained;

[0123] S3: To the pre-emulsion B prepared in step S2, humic acid and deionized water are added, and stirring is carried out to raise the temperature to 60℃ at a rate of 2℃ per minute, 10 kg of an initiator APS aqueous solution is added, and stirring is continued to raise the temperature to 78℃, the remaining initiator APS aqueous solution is added dropwise, and the dropwise addition time is 2h; continue to stir and raise the temperature to 85℃ while adding;

[0124] S4: After the dropwise addition is completed, the temperature is raised to 92℃ and the reaction is continued for 30 min, then it is lowered to 72℃ and kept for 30 min, and then it is cooled to room temperature and filtered to discharge the material, and then the impact-resistant mixing additive is obtained;

[0125] S5: The industrial solid waste slag particle mixture, silicate powder preparation, water reducing agent, anti-cracking agent powder preparation, anti-freeze-thaw compound mixed powder, lime fine powder and blocky gypsum raw material are weighed;

[0126] S6: The industrial solid waste slag particles weighed in step S5 are dried to have a moisture content of less than 1%; the silicate powder preparation, water reducing dry compound mixed preparation, lime fine powder, blocky gypsum raw material, anti-cracking and expansion powder compound mixed preparation and the dried industrial solid waste slag particles are ground, mixed after grinding is completed, and the other raw materials weighed in step S5 are added to the mixture, and mixed uniformly to obtain a reinforcing agent;

[0127] S7: The impact-resistant mixing additive prepared in step S4 and the reinforcing agent prepared in step S6 are placed in a stirrer and fully stirred and mixed to obtain a well-mixed soil solidifying agent;

[0128] S8: The soil solidifying agent prepared in step S7 is collected and stored, and a high-cold mine road impact-resistant soil solidifying agent prepared from industrial solid waste is obtained.

[0129] In step S2, the pH adjuster is a saturated sodium hydroxide solution at 20℃.

[0130] In step S5, the industrial solid waste slag particle mixture is a mixture of metallurgical waste slag and mining waste slag in a ratio of 1:1.

[0131] In step S5, the water reducing agent is an aminosulfonate salt type high efficiency water reducing agent.

[0132] In step S5, the preparation method of the anti-freeze-thaw compounded mixed powder is as follows: weighing the stabilizer ammonium chloride powder preparation, the room temperature state water-based epoxy resin solution, the hot waste asphalt, and the anionic emulsifier particle powder, and placing the weighed raw materials in the interior of a stirring reaction kettle at 150-200°C for 3-5 hours to obtain the anti-freeze-thaw compounded mixed powder.

[0133] In step S6, the grinding time is 120 min, and the industrial waste residue is ground to a surface area of 550 m 2 / kg.

[0134] In step S7, the stirring speed is controlled to be 295 r / min during the mixing and stirring, and the stirring time is 80 min.

[0135] Example 3

[0136] The embodiment provides a soil stabilizer composed of an impact-resistant mixed additive and a reinforcing agent, and includes the following components:

[0137] The impact-resistant mixed additive includes 220 kg of brown coal humic acid and 150 kg of deionized water, 18 kg of a potassium persulfate aqueous solution (initiator), 520 kg of butyl acrylate, 120 kg of styrene, 20 kg of acrylic acid, 15 kg of an emulsifier DNS-86, and 5 kg of ANPEO10.

[0138] The reinforcing agent includes 600 kg of an industrial solid waste residue particle mixture, 50 kg of a silicate powder preparation, 15 kg of a water reducing agent, 30 kg of an anti-cracking agent powder preparation, 25 kg of an anti-freeze-thaw compounded mixed powder, 20 kg of lime fine powder, and 75 kg of blocky gypsum raw material.

[0139] The anti-cracking agent powder preparation is composed of 100 kg of glass fiber powder, 110 kg of calcium carbonate, and 50 kg of ethanol.

[0140] The anti-freeze-thaw compounded mixed powder includes 20 kg of an ammonium chloride powder preparation, 150 kg of a room temperature state water-based epoxy resin solution, 100 kg of hot waste asphalt, and 40 kg of an anionic emulsifier particle powder (a mixture of sodium oleate, sodium abietate, sodium laurate, and sodium naphthenate).

[0141] The method for preparing an impact-resistant soil stabilizer for roads in high-cold mine areas by using industrial solid waste includes the following steps:

[0142] S1: first, the preparation of the impact-resistant mixed additive is performed, and 40 kg of butyl acrylate, styrene, and acrylic acid are weighed, and the weighed materials are fully mixed to obtain a mixture A;

[0143] S2: After adding emulsifier particle powder DNS-86, ANPEO10, and adjusting pH value to 9 using pH regulator, dispersion is carried out for 5 minutes using a handheld homogenizer, and finally a stable pre-emulsion B is obtained;

[0144] S3: Humic acid and 170 kg of deionized water are added to the pre-emulsion B prepared in step S2, stirring and heating, 20 kg of initiator APS aqueous solution is added, and stirring and heating is continued until the temperature reaches 85℃, when the temperature is 78℃, the remaining pre-emulsion and water-soluble initiator components prepared in advance are added dropwise, and the dropwise addition time is 2-3 h;

[0145] S4: After the dropwise addition is completed, the temperature is raised to 92℃ and the reaction is continued for 30 min, then it is lowered to 72℃ and kept for 30 min, and then it is cooled, filtered and discharged, and then an impact-resistant mixed additive is obtained;

[0146] S5: Industrial solid waste slag particles, silicate powder preparation, water reducing agent, anti-cracking agent powder preparation, anti-freeze-thaw compound mixed powder, lime fine powder and blocky gypsum raw material are weighed;

[0147] S6: The industrial solid waste slag particle mixture weighed in step S5 is dried to have a moisture content of less than 1%, and then the silicate powder preparation, water reducing dry compound mixed preparation, lime fine powder, blocky gypsum raw material, anti-cracking and expansion powder compound mixed preparation, and industrial waste slag are ground, and after the grinding is completed, the remaining raw materials weighed in step S5 are added to the inside;

[0148] S7: The impact-resistant mixed additive prepared in step S4 and the raw materials prepared in step S6 are placed in a stirrer and fully stirred and mixed to obtain a mixed soil solidifying agent;

[0149] S8: The soil solidifying agent prepared in step S7 is collected and stored, and the whole process of preparing a high-cold mine area road impact-resistant soil solidifying agent from industrial solid waste is completed.

[0150] In step S2, the pH regulator is a saturated sodium hydroxide solution at 20℃.

[0151] In step S3, the temperature is raised to 60℃ at a rate of 2℃ per minute during stirring and heating.

[0152] In step S4, the temperature is continuously raised to 85℃, when the temperature is 78℃, the remaining pre-emulsion and water-soluble initiator components that have not been used are added dropwise at the same time, the dropwise addition time is 2.5 hours, after the dropwise addition is completed, the temperature is raised to 92℃ and the reaction is continued for 30 min, then the temperature is lowered to 72℃ and kept for 30 min, and finally it is cooled, filtered and discharged.

[0153] In step S5, the industrial solid waste residue particle mixture is an equal ratio mixture of fuel waste residues and chemical waste residues.

[0154] In step S5, the water reducing agent is a powder polycarboxylate.

[0155] In step S5, the preparation method of the anti-freeze-thaw compound mixed powder is as follows: weighing the stabilizer ammonium chloride powder preparation, the room temperature state water-based epoxy resin solution, the hot waste asphalt, and the anionic emulsifier particle powder, placing the weighed raw materials in the interior of a stirring reaction kettle at 150°C for 4h to obtain the anti-freeze-thaw compound mixed powder.

[0156] In step S6, the grinding time is 120min, and the industrial waste residues are ground to a surface area of 550m 2 / kg.

[0157] In step S7, the stirring speed of the mixer is controlled at 295r / min during the mixing and stirring, and the stirring time is 80min.

[0158] Example 4

[0159] The present embodiment provides a soil stabilizer composed of an impact-resistant mixed additive and a reinforcing agent, including the following components:

[0160] The impact-resistant mixed additive includes 210kg of humic acid and 160kg of deionized water, kg of initiator APS aqueous solution, 500kg of butyl acrylate, 100kg of styrene, 30kg of acrylic acid, 10kg of emulsifier DNS-86, and 5kg of ANPEO10;

[0161] The reinforcing agent includes: an industrial solid waste residue particle mixture 650kg, a silicate powder preparation 40kg, a water reducing agent 14kg, an anti-cracking agent powder preparation 20kg, an anti-freeze-thaw compound mixed powder 20kg, lime fine powder 15kg, and blocky gypsum raw material 70kg;

[0162] The anti-cracking agent powder preparation is composed of kg of glass fiber powder, 110kg of calcium carbonate, and 50kg of ethanol;

[0163] The anti-freeze-thaw compound mixed powder includes 20kg of ammonium chloride powder preparation, 150kg of room temperature state water-based epoxy resin solution, 100kg of hot waste asphalt, and 40kg of anionic emulsifier particle powder (a mixture of sodium oleate, sodium abietate, sodium laurate, and sodium naphthenate).

[0164] The method for preparing an impact-resistant soil stabilizer for high-cold mine roads using industrial solid waste includes the following steps:

[0165] S1: First, the preparation of impact-resistant mixing additives is carried out, and the following are weighed: butyl acrylate, styrene and acrylic acid. After the weighed materials are thoroughly mixed, a mixture A is obtained;

[0166] S2: The mixture containing emulsifier particle powder DNS-86 and ANPEO10 is added dropwise, and the pH value is adjusted to 9 using a pH adjuster. After 5 minutes of dispersion with a handheld homogenizer, a stable pre-emulsion B is prepared.

[0167] S3: To the pre-emulsion B prepared in step S2, humic acid and deionized water are added, and stirring and heating are carried out. An initiator APS aqueous solution is added, and the stirring and heating are continued until the temperature reaches 85℃. When the temperature is 78℃, the remaining pre-emulsion and water-soluble initiator components are added dropwise, and the dropwise addition time is 2 hours.

[0168] S4: After the dropwise addition is completed, the temperature is raised to 92℃ and the reaction is continued for 30 minutes. Then the temperature is lowered to 72℃ and kept for 30 minutes. After cooling and filtering, the impact-resistant mixing additives are obtained.

[0169] S5: The industrial solid waste slag particle mixture, silicate powder preparation, water reducing agent, anti-cracking agent powder preparation, anti-freeze-thaw compound mixed powder, lime fine powder and blocky gypsum raw material are weighed.

[0170] S6: The industrial solid waste slag particle mixture weighed in step S5 is dried to a moisture content of less than 1%. Then the silicate powder preparation, water reducing dry compound mixed preparation, lime fine powder, blocky gypsum raw material, anti-cracking and expansion powder compound mixed preparation, and industrial waste slag are ground. After grinding, the remaining raw materials weighed in step S5 are added to the inside.

[0171] S7: The impact-resistant mixing additives prepared in step S4 and the raw materials prepared in step S6 are placed in a stirrer and thoroughly mixed to obtain a well-mixed soil solidifying agent.

[0172] S8: The soil solidifying agent prepared in step S7 is collected and stored, and the entire process of preparing a high-cold mine area road impact-resistant soil solidifying agent from industrial solid waste is completed.

[0173] In step S2, the pH adjuster is a saturated sodium hydroxide solution at 20℃.

[0174] In step S3, the temperature is raised to 60℃ at a rate of 2℃ / min during the stirring and heating process.

[0175] In step S4, the stirring is continued while the temperature is raised to 85°C, and when the temperature is 78°C, the remaining pre-emulsion and the aqueous initiator component are added dropwise simultaneously, and the dropwise addition is performed for 2 h. After the dropwise addition is completed, the temperature is raised to 92°C and the reaction is continued for 30 min, then the temperature is lowered to 72°C and the temperature is maintained for 30 min, and then the material is cooled and filtered.

[0176] In step S5, the industrial solid waste residue particle mixture is one or more of metallurgical waste residue, mining waste residue, fuel waste residue, and chemical waste residue.

[0177] In step S5, the water reducing agent is one of an aminosulfonate-based high-efficiency water reducing agent, a powder polycarboxylate, and a naphthalene sulfonate water reducing agent.

[0178] In step S5, the preparation method of the anti-freeze-thaw compounded mixture powder is as follows: 20 kg of the stabilizer ammonium chloride powder preparation, 150 kg of the room temperature state aqueous epoxy resin solution, 100 kg of the hot waste asphalt, and 40 kg of the anionic emulsifier particle powder are weighed, the weighed raw materials are placed in the interior of a stirring reaction kettle at 150-200°C, and the reaction is performed for 3-5 h to obtain the anti-freeze-thaw compounded mixture powder.

[0179] In step S6, the grinding time is 120 min, and the industrial waste residue is ground to a surface area of 550 m 2 / kg.

[0180] In step S7, the stirring speed of the mixer is controlled to be 295 r / min during the mixing and stirring, and the stirring time is 80 min.

[0181] Comparative Example 1

[0182] The soil stabilizer is prepared according to the method of Example 4, except that the anti-freeze-thaw compounded mixture powder is not added in the composition.

[0183] The impact-resistant mixed additive of the present comparative example includes 210 kg of humic acid and 18160 kg of deionized water, kg of initiator APS aqueous solution, 500 kg of butyl acrylate, 100 kg of styrene, 30 kg of acrylic acid, 10 kg of emulsifier particle powder DNS-86, and 5 kg of ANPEO10.

[0184] The reinforcing agent includes: industrial solid waste residue particle mixture 650 kg, silicate powder preparation 40 kg, water reducing agent 14 kg, anti-cracking agent powder preparation 20 kg, lime fine powder 15 kg, and blocky gypsum raw material 70 kg.

[0185] Comparative Example 2

[0186] The soil stabilizer is prepared according to the method of Example 4, except that the anti-cracking agent powder preparation is not added in the composition.

[0187] The impact-resistant mixed additive of the present comparative example comprises 210 kg humic acid and 18160 kg deionized water, kg of initiator APS aqueous solution, 500 kg of butyl acrylate, 100 kg of styrene, 30 kg of acrylic acid; 10 kg of emulsifier particle powder DNS-86 and 5 kg of ANPEO10;

[0188] The reinforcing agent comprises: industrial solid waste slag particle mixture 650 kg, silicate powder preparation 40 kg, water reducing agent 14 kg, freeze-thaw resistant compound mixed powder 20 kg, lime fine powder 15 kg and blocky gypsum raw material 70 kg.

[0189] Comparative Example 3

[0190] The present comparative example provides a common soil stabilizer, wherein water glass and lime are first dissolved in water to generate amorphous calcium silicate, and then sodium lignosulfonate is added and uniformly mixed to obtain the soil stabilizer. The mass ratio of the water glass, the lime and the sodium lignosulfonate is 0.6-1:1:1-6, wherein the modulus of the water glass is 3.3-4.2.

[0191] The soil stabilizers prepared in Examples 1-4 and Comparative Examples 1-3 are respectively made into standard test pieces (in accordance with JTG E51-2009 “Highway Engineering Inorganic Binder Stabilized Material Test Procedures”), and then comparative analysis is performed, and the results are shown in Tables 1, 2 and 3:

[0192] 1. Freeze-thaw resistance test results

[0193] Table 1. Freeze-thaw resistance test results

[0194] 2. Water stability test results

[0195] Table 2. Water stability test results

[0196] The results show that the water stability and freeze-thaw resistance of the test pieces after adding the soil stabilizers of Examples 1-4 of the present application are better than those of the stabilizers of Comparative Examples 1-3, and the residual stability meets the requirements in the specification (greater than 80%).

[0197] 3. Low-temperature performance test results

[0198] Table 3. Low-temperature performance test results

[0199] The results show that the soil stabilizer test pieces of Examples 1-4 of the present application have certain improvement in the bending tensile strength, bending stiffness modulus, maximum deflection, maximum bending tensile deformation and other indicators, indicating that the components of the soil stabilizer of the present application can improve the performance of the soil at low temperature.

[0200] Obviously, the above embodiments are merely example for clearly illustrating but not limitation to the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments are not required to be enumerated and it is impossible to enumerate all the embodiments. The changes or variations derived from the above are still within the protection scope of the present application.

Claims

1. A soil stabilizer, characterized by, The soil solidifying agent comprises an impact-resistant mixed additive and a reinforcing agent; The impact-resistant mixed additive comprises the following components by weight: 200-220 parts of humic acid, 15-20 parts of an initiator solution, 480-520 parts of butyl acrylate, 100-120 parts of styrene, 20-40 parts of acrylic acid, 8-15 parts of an emulsifier, and 3-5 parts of a surfactant; The reinforcing agent comprises the following components by weight: 500-700 parts of an industrial solid waste residue particle mixture, 20-50 parts of a silicate, 10-15 parts of a water-reducing agent, 20-30 parts of an anti-cracking agent, 20-25 parts of an anti-freeze-thaw compound mixed powder, 15-20 parts of lime, and 30-75 parts of gypsum.

2. The soil stabilizer according to claim 1, wherein The reinforcing agent satisfies any one or more of the following A-D: A: The anti-cracking agent is composed of 80-120 parts by weight of glass fiber powder, 100-120 parts by weight of calcium carbonate, and 50 parts by weight of ethanol; B: The anti-freeze-thaw compound mixed powder comprises the following raw materials: 15-25 parts by weight of ammonium chloride, 120-180 parts by weight of an aqueous epoxy resin solution, 80-120 parts by weight of waste asphalt, and 30-50 parts by weight of an anionic emulsifier particle powder; C: The industrial solid waste residue particle mixture is one or more of metallurgical waste residue, mining waste residue, fuel waste residue, and chemical waste residue; Preferably, the water content of the industrial solid waste residue particle mixture is less than 1 wt%; More preferably, the specific surface area of the industrial solid waste residue particle mixture is 500-600 m 2 / kg; D: The water-reducing agent is one or more of an aminosulfonate-based high-efficiency water-reducing agent, a powder polycarboxylate, and a naphthalene sulfonate water-reducing agent.

3. The soil stabilizer of claim 1 or 2, characterized in that In the impact-resistant mixed additive, The initiator solution is an APS aqueous solution, and preferably the content of APS is 55-65 wt.%; And / or, the emulsifier is DNS-86.

4. A method of preparing a soil stabilizer according to any one of claims 1 to 3, characterized in that, The preparation method comprises the following steps: S1: mixing butyl acrylate, styrene, and acrylic acid to form a mixture A; S2: dropping the mixture A obtained in step S1 into a mixture containing an emulsifier and a surfactant to form a pre-emulsion B; S3: adding humic acid, deionized water, and an initiator solution to the pre-emulsion B obtained in step S2 to form an impact-resistant mixed additive; S4: stirring and mixing all raw materials of the impact-resistant mixed additive and the reinforcing agent obtained in step S3 to obtain the soil solidifying agent.

5. The preparation method according to claim 4, characterized in that, In step S3, first, add humic acid and deionized water to the pre-emulsion B, stir and heat to 60-78°C, drop the initiator solution while stirring and heating to 83-87°C, continue stirring and heating to 90-94°C after dropping is completed, and continue to react and then filter to form the impact-resistant mixed additive; Preferably, stir and heat to 60-78°C at a speed of 1-3°C per minute; More preferably, the time for dropping the initiator solution is 2-3 hours.

6. The production method according to claim 5, characterized by, After heating to 90-94°C, continue to react for 25-35 minutes; then cool to 70-74°C for 25-35 minutes, and finally cool, filter; Preferably, the filtering is performed using a filter membrane with a pore size of 60-80 mesh; More preferably, the cooling is to 20-30°C.

7. The production method according to claim 4 or 5, characterized by, The pH in the pre-emulsion B is 8-9.

8. The production method according to any one of claims 4 to 7, characterized by, The preparation method of the anti-freezing and thawing compound mixed powder comprises the following steps: mixing ammonium chloride, an aqueous epoxy resin solution, waste asphalt and an anionic emulsifier particle powder, and reacting at 150-200 DEG C for 3-5 hours to obtain the anti-freezing and thawing compound mixed powder. and / or, the industrial solid waste residue particle mixture is ground to a specific surface area of 500-600 m 2 / kg before being added.

9. Application of the soil stabilizer prepared by the method of any one of claims 1-3 or 4-8 in road engineering. Preferably, the road is a mine road in an alpine region.

10. A pavement base material, characterized by, The road base material comprises the soil stabilizer of any one of claims 1-3 or the soil stabilizer prepared by the method of any one of claims 4-7, and the addition amount of the soil stabilizer is 4-6% of the weight of the road base material.

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