CN114106844A - Bio-based liquid soil curing agent with improved strength and preparation method thereof - Google Patents
Bio-based liquid soil curing agent with improved strength and preparation method thereof Download PDFInfo
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- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 65
- 239000007788 liquid Substances 0.000 title claims abstract description 46
- 239000002689 soil Substances 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 claims abstract description 87
- 235000013379 molasses Nutrition 0.000 claims abstract description 49
- 229920001467 poly(styrenesulfonates) Polymers 0.000 claims abstract description 31
- 229940006186 sodium polystyrene sulfonate Drugs 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 229920005551 calcium lignosulfonate Polymers 0.000 claims abstract description 30
- RYAGRZNBULDMBW-UHFFFAOYSA-L calcium;3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Ca+2].COC1=CC=CC(CC(CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O RYAGRZNBULDMBW-UHFFFAOYSA-L 0.000 claims abstract description 30
- RGPUVZXXZFNFBF-UHFFFAOYSA-K diphosphonooxyalumanyl dihydrogen phosphate Chemical compound [Al+3].OP(O)([O-])=O.OP(O)([O-])=O.OP(O)([O-])=O RGPUVZXXZFNFBF-UHFFFAOYSA-K 0.000 claims abstract description 20
- LNOPIUAQISRISI-UHFFFAOYSA-N n'-hydroxy-2-propan-2-ylsulfonylethanimidamide Chemical compound CC(C)S(=O)(=O)CC(N)=NO LNOPIUAQISRISI-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000003583 soil stabilizing agent Substances 0.000 claims abstract description 9
- 239000002131 composite material Substances 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims description 134
- 101000623895 Bos taurus Mucin-15 Proteins 0.000 claims description 44
- 238000002156 mixing Methods 0.000 claims description 39
- 239000012153 distilled water Substances 0.000 claims description 25
- 238000001816 cooling Methods 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 24
- 239000000203 mixture Substances 0.000 claims description 19
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical class [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 13
- 238000001914 filtration Methods 0.000 claims description 12
- QDWYPRSFEZRKDK-UHFFFAOYSA-M sodium;sulfamate Chemical compound [Na+].NS([O-])(=O)=O QDWYPRSFEZRKDK-UHFFFAOYSA-M 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 239000003814 drug Substances 0.000 claims description 2
- 238000009775 high-speed stirring Methods 0.000 claims description 2
- 239000004615 ingredient Substances 0.000 claims 1
- 230000007613 environmental effect Effects 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 239000011521 glass Substances 0.000 description 11
- 239000002028 Biomass Substances 0.000 description 10
- 239000004927 clay Substances 0.000 description 8
- 239000002245 particle Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 239000004568 cement Substances 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000010802 sludge Substances 0.000 description 4
- 239000004266 EU approved firming agent Substances 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- 238000013329 compounding Methods 0.000 description 3
- 229920002521 macromolecule Polymers 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 229920001732 Lignosulfonate Polymers 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 229920005552 sodium lignosulfonate Polymers 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 229910000951 Aluminide Inorganic materials 0.000 description 1
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- -1 aluminum ions Chemical class 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910000403 monosodium phosphate Inorganic materials 0.000 description 1
- 235000019799 monosodium phosphate Nutrition 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 230000004584 weight gain Effects 0.000 description 1
- 235000019786 weight gain Nutrition 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2103/00—Civil engineering use
Abstract
The invention provides a bio-based high water resistance liquid soil curing agent, which comprises the following components: 0.2-0.5 part of calcium lignosulfonate, 0.7-1.1 part of sodium polystyrene sulfonate and 1.2-1.8 parts of lithium hydroxide; also comprises molasses, aluminum dihydrogen phosphate and sulfamic acid. The invention also provides a preparation method of the high-strength bio-based liquid soil stabilizer. The invention has the characteristics of environmental protection, environmental protection and sustainability, adopts a composite formula of bio-based organic matters and inorganic matters, improves the early strength of curing of the curing agent, and is beneficial to the practical application of engineering.
Description
Technical Field
The invention relates to the technical field of soil firming agents, in particular to a bio-based liquid soil firming agent with improved strength and a preparation method thereof.
Background
Sustainable development is the subject of current development. With the continuous promotion of the national requirement on environmental protection, the development and use of resources such as sand, stone and the like in industries such as buildings, roads and the like are limited, so that the cost of raw materials in related industries is increased continuously. Biomass and soil (e.g., natural sludge, etc.) are gaining increasing attention as sustainable alternative materials.
The soil stabilizer is a novel environment-friendly energy-saving engineering material which can generate physical and chemical actions with soil components to change the soil property. The material starts engineering application in developed countries in Europe and America in the seventies of the last century, is mainly used for replacing traditional curing materials such as cement, lime, fly ash and the like, is characterized by small using amount, high curing efficiency and adjustable performance, and is widely applied to the fields of roads, water conservancy, airport runways, ramp soil conservation and the like. Compared with the traditional curing material, the soil curing agent has the advantages of excellent engineering properties, harmony and unity with ecological environment, can not destroy the original soil ecological environment, and is one of the curing materials ideal in economic environment.
The soil stabilizer may be classified into inorganic type, organic type, ionic type and bio-enzyme type and their composite products in composition. The inorganic soil curing agent is a product improved on the basis of materials such as cement, limestone and the like, the main form of the inorganic soil curing agent is powder type, and the inorganic soil curing agent has the advantages of good stability and low cost, but the curing agent is easy to crack and has unsatisfactory early strength, so that the curing agent is used in the domestic market at present; the organic soil stabilizer is a liquid stabilizer with macromolecules as main components, has the advantages of small dosage and easy control of strength, but has narrow application range, and part of macromolecule components are easy to age; the biological enzyme curing agent belongs to a biological curing agent, has obvious curing effect on the high-plasticity clay, has higher preparation cost and is easy to degrade, so the service life of the high-plasticity clay is influenced; the ionic curing agent is a curing agent with liquid form and water-solubility. In consideration of comprehensive properties, the current task of developing soil firming agents is mainly focused on improving the strength, water resistance, economy, environmental protection and construction convenience of soil firming agents while seeking inexpensive raw materials (such as biomass materials) having high initial strength. For sludge engineering with higher requirements on initial strength, the curing agent compounded by organic matters (particularly biomass organic matters) and inorganic matters has natural advantages in this respect. Chinese patent 'a soil curing agent and its preparation method (No. CN 105505400B)' uses the compounding of biomass polysaccharide, lignosulfonate and inorganic substance to obtain the curing agent, the hardness of the cured soil exceeds that of red bricks; (ii) a Chinese patent "soil curing agent and its preparation method and application (publication No. CN 111205874A)" discloses a curing agent compounded by organic and inorganic substances such as sodium lignosulphonate, and the soil curing agent has better compressive strength. From the perspective of green and environmental protection, the strength of the current curing agent is not ideal enough, even if cement, quicklime and the like in preset proportion are added according to the industrial standard, the unconfined compressive strength of the curing agent in 7 days is between 1.8 and 2.5MPa, and the saturated unconfined compressive strength of the Magic series products and the Pansai products in 7 days in the United states is only 0.3MPa and 0.1 MPa. Looking at the development history of the curing agent, the biomass-based curing agent is expected to become a high-performance soil curing agent suitable for the new generation of engineering (Transportation Geotechnics, 2021, 26, 100425).
Therefore, based on the practical requirements, the use of traditional curing materials such as cement and the like is reduced as much as possible, and the formula of compounding the bio-based organic matter and the inorganic matter is implemented, so that the early strength of the curing is improved, and the rapid curing of the sludge is convenient for the practical application of engineering, such as the rapid curing of the sludge.
Disclosure of Invention
Aiming at the technical defects and engineering requirements, the invention provides a liquid curing agent which is prepared by compounding organic matters and inorganic matters and is adjustable and suitable for acid, neutral and alkaline soil. The curing agent takes organic matters such as biomass molasses, lignin derivatives and the like, and inorganic lithiates and phosphorus aluminides as raw materials, and water-soluble liquid curing agents with wide application range are obtained through treatment by a preset process. The curing agent contains cheap components and simple preparation process. Based on 100 parts of the total weight of the formula (parts are mass percent), the invention comprises the following specific contents:
a high strength bio-based liquid soil stabilizer comprising: the composite material comprises a component I and a component II, wherein the component I comprises calcium lignosulfonate, sodium polystyrene sulfonate and lithium hydroxide, the total amount of the component I is controlled to be 3 parts, the part range of the calcium lignosulfonate is controlled to be 0.2-0.5 part, the part range of the sodium polystyrene sulfonate is controlled to be 0.7-1.1 part, and the part range of the lithium hydroxide is controlled to be 1.2-1.8 parts; the component II comprises molasses, aluminum dihydrogen phosphate, sulfamic acid or sodium sulfamate, the proportion of the molasses to the aluminum dihydrogen phosphate in the component II ranges from 1 to 1.6, and the amount of the sulfamic acid or the sodium sulfamate is 0.4 to 0.6 times of the total weight of the molasses and the aluminum dihydrogen phosphate; the liquid medicine also comprises distilled water and a saturated sodium chloride solution, wherein the part of the saturated sodium chloride solution is 10-30 parts.
Specifically, all the components contained in the component I and the component II are of industrial grade.
The organic matter is a bio-based material or a bio-based derivative material.
Specifically, in the component I, the preferable parts of calcium lignosulfonate, sodium polystyrene sulfonate and lithium hydroxide are 0.4, 0.9 and 1.7 respectively.
Specifically, in the component II, the preferred ratio of molasses to aluminum dihydrogen phosphate is 1.5.
Specifically, in the component II, sulfamic acid or sodium sulfamate is preferably present in an amount of 0.5 times the total weight of molasses and sodium dihydrogen phosphate.
Specifically, the preferred amount of the mixture of the component I and the component II is 20 parts by weight after mixing with a saturated sodium chloride solution.
A preparation method of a high-strength bio-based liquid soil curing agent comprises the following steps of carrying out reaction in a constant-temperature electric heating jacket with a stirring device and equipped with a 250ml glass instrument:
1) respectively adding calcium lignosulfonate, sodium polystyrene sulfonate and lithium hydroxide into 7 parts of 50-70 ℃ distilled water, stirring and mixing until all the calcium lignosulfonate, the sodium polystyrene sulfonate and the lithium hydroxide are dissolved, stirring and reacting for not less than 4 hours, and standing for not less than 12 hours at constant temperature to obtain a component I;
2) mixing molasses and liquid aluminum dihydrogen phosphate according to a preset weight ratio, quickly stirring and preheating to a preset temperature, maintaining the operation state for at least half a hour to obtain a molasses diluted solution, then heating the molasses diluted solution to the preset temperature, adding sulfamic acid or sodium sulfamate with a preset weight into the molasses diluted solution, then stirring the mixture at a high speed for not less than 4 hours, and cooling to room temperature to obtain a component II;
3) and (2) mixing the component I and the component II by high-speed stirring at a preset temperature, controlling the pH value of the mixture to be 6-8 by adjusting the ratio of the adding amount of the component I to the component II, adding a preset amount of saturated sodium chloride solution, continuously stirring for half an hour, cooling to room temperature, stopping stirring, standing for layering, taking an oil layer, and filtering to obtain a liquid curing agent.
In particular, the temperature of distilled water in the component I is preferably 60 ℃.
Specifically, the preheating temperature range of the component II is 30-50 ℃, and preferably 40 ℃;
specifically, the heating reaction temperature range in the component II is 90-125 ℃, and preferably 115 ℃.
Specifically, the reaction temperature range of the mixed component I and the mixed component II is 50-70 ℃, and preferably 60 ℃.
The constituent components and the proportion of the soil stabilizer influence the performance of the soil solidified by the stabilizer, while the sequential exchange of cations, such as calcium ions, aluminum ions, lithium ions, sodium ions and the like (temperature is a main control parameter) changes the thickness of an electric double layer of soil particles, so that the soil particles are cemented, and the generation of precipitates further increases the strength of the solidified soil; the lipophilic part of organic substances, such as calcium lignosulfonate and sodium polystyrene sulfonate, among macromolecules can cover the surface of soil particles, which is beneficial to improving the stability of the particles and releasing free water. Combining the two contributes to improving the strength of the solidified soil.
The invention has the beneficial effects that:
1. the invention uses renewable environment-friendly biomass materials and biomass derivative organic components as raw materials, and provides a high-strength biological-based liquid soil curing agent and a preparation method thereof. The molasses used in the formulation is directly pressed from natural biomass, while sodium lignosulfonate is a derivative of lignin, and sodium polystyrene sulfonate can also be converted to a predetermined extent from biomass (e.g. glycerol). Therefore, the organic component raw materials of the curing agent have the advantages of green, environmental protection and sustainability, and the price is advantageous in the long term.
2. The curing agent is filled among the dispersed silt soil particles to reduce or eliminate the fluidity of the silt soil particles, so that the silt is cured and molded quickly, and the silt has initial strength. The higher initial strength is beneficial to the construction of engineering, and simultaneously, the time cost and the engineering cost can be reduced. The curing agent obtained by using the organic and inorganic composite liquid curing agent formula is improved in curing performance, and is particularly suitable for quick construction of projects needing higher strength in the early stage.
3. The liquid curing agent has adjustable preparation process, can prepare alkaline, neutral and acidic curing agents by adjusting the mixing ratio of the component I and the component II, is suitable for soils with different properties, and has strong adaptability.
4. The preparation process of the liquid curing agent provided by the invention is simple and clear, and complex instruments and equipment are not needed; in addition, the fluidity of the liquid curing agent also brings convenience to construction.
Detailed Description
The following 7 specific examples are provided, based on the weight of the formulation optimization conditions affecting the curing agent performance:
example 1
Adding 7 parts of distilled water into a glass bottle with magnetons, sequentially adding 0.4 part of calcium lignosulfonate, 0.9 part of sodium polystyrene sulfonate and 1.7 parts of lithium hydroxide at room temperature, stirring and mixing at a stirring speed of 500rpm until all the calcium lignosulfonate, the sodium polystyrene sulfonate and the lithium hydroxide are dissolved, heating to 60 ℃, continuously stirring at the same speed for reaction for 4 hours, and standing at a constant temperature of 60 ℃ for 12 hours after stirring is finished to obtain a component I; then mixing 1.5 parts of molasses and 1 part of liquid aluminum dihydrogen phosphate, stirring at the stirring speed of 1000rpm, preheating to 40 ℃, maintaining the state for 30min to obtain a molasses diluted solution, then heating the molasses diluted solution to 120 ℃, adding 1.3 parts of sulfamic acid, stirring the mixture at the stirring speed of 1500rpm for 4h, and cooling to room temperature to obtain a component II; and finally, stirring and mixing the component I and the component II at the stirring speed of 1500rpm at the temperature of 60 ℃ to obtain a mixed system with the pH value of 7.5, simultaneously adding 20 parts of saturated sodium chloride solution and 73.2 parts of distilled water, continuously stirring at the stirring speed of 500rpm for 30min, cooling to room temperature, stopping stirring, standing for layering, taking an oil layer, and filtering to obtain a liquid curing agent.
Example 2
Adding 7 parts of distilled water into a glass bottle with magnetons, sequentially adding 0.5 part of calcium lignosulfonate, 0.6 part of sodium polystyrene sulfonate and 1.9 parts of lithium hydroxide at room temperature, stirring and mixing at the speed of 500rpm until all the calcium lignosulfonate, the sodium polystyrene sulfonate and the lithium hydroxide are dissolved, heating to 60 ℃, stirring at the same speed for reaction for 4 hours, stopping stirring, and then maintaining the constant temperature of 60 ℃ for standing for 12 hours to obtain a component I; mixing 1.5 parts of molasses and 1 part of liquid aluminum dihydrogen phosphate, stirring at the stirring speed of 1000rpm, preheating to 40 ℃, maintaining the state for 30min to obtain a molasses diluted solution, then heating the molasses diluted solution to 115 ℃, adding 1.3 parts of sulfamic acid, stirring the mixture at the stirring speed of 1500rpm for 4h, and cooling to room temperature to obtain a component II; and finally, stirring and mixing the component I and the component II at the stirring speed of 1500rpm at the temperature of 60 ℃ to obtain a mixed system with the pH value of 7, simultaneously adding 20 parts of saturated sodium chloride solution and 73.2 parts of distilled water, continuously stirring at the stirring speed of 500rpm for 30min, cooling to room temperature, stopping stirring, standing for layering, taking an oil layer, and filtering to obtain the liquid curing agent.
Example 3
Adding 7 parts of distilled water into a glass bottle with magnetons, sequentially adding 0.4 part of calcium lignosulfonate, 0.9 part of sodium polystyrene sulfonate and 1.7 parts of lithium hydroxide at room temperature, stirring and mixing at the speed of 500rpm until all the calcium lignosulfonate, the sodium polystyrene sulfonate and the lithium hydroxide are dissolved, heating to 60 ℃, stirring at the same speed for reacting for 4 hours, stopping stirring, maintaining the constant temperature of 60 ℃, and standing for 12 hours to obtain a component I; mixing 1.4 parts of molasses with 1.2 parts of liquid aluminum dihydrogen phosphate, stirring at the stirring speed of 1000rpm, preheating to 40 ℃, maintaining the state for 30min to obtain a molasses diluted solution, then heating the molasses diluted solution to 115 ℃, adding 1.3 parts of sulfamic acid, stirring the mixture at the stirring speed of 1500rpm for 4h, and cooling to room temperature to obtain a component II; and finally, stirring and mixing the component I and the component II at the stirring speed of 1500rpm at the temperature of 60 ℃ to obtain a mixed system with the pH value of 7, simultaneously adding 20 parts of saturated sodium chloride solution and 73.1 parts of distilled water, continuously stirring at the stirring speed of 500rpm for 30min, cooling to room temperature, stopping stirring, standing for layering, taking an oil layer, and filtering to obtain the liquid curing agent.
Example 4
Adding 7 parts of distilled water into a glass bottle with magnetons, sequentially adding 0.6 part of calcium lignosulfonate, 0.8 part of sodium polystyrene sulfonate and 1.6 parts of lithium hydroxide at room temperature, stirring and mixing at the speed of 500rpm until all the calcium lignosulfonate, the sodium polystyrene sulfonate and the lithium hydroxide are dissolved, heating to 60 ℃, stirring at the same speed for reaction for 4 hours, stopping stirring, maintaining the constant temperature of 60 ℃, and standing for 12 hours to obtain a component I; mixing 1.4 parts of molasses with 1.2 parts of liquid aluminum dihydrogen phosphate, stirring at the stirring speed of 1000rpm, preheating to 40 ℃, maintaining the state for 30min to obtain a molasses diluted solution, then heating the molasses diluted solution to 115 ℃, adding 1.3 parts of sodium sulfamate, stirring the mixture at the stirring speed of 1500rpm for 4h, and cooling to room temperature to obtain a component II; and finally, stirring and mixing the component I and the component II at the stirring speed of 1500rpm at the temperature of 60 ℃ to obtain a mixed system with the pH value of 7, simultaneously adding 20 parts of saturated sodium chloride solution and 73.1 parts of distilled water, continuously stirring at the stirring speed of 500rpm for 30min, cooling to room temperature, stopping stirring, standing for layering, taking an oil layer, and filtering to obtain the liquid curing agent.
Example 5
Adding 7 parts of distilled water into a glass bottle with magnetons, sequentially adding 0.4 part of calcium lignosulfonate, 0.9 part of sodium polystyrene sulfonate and 1.7 parts of lithium hydroxide at room temperature, stirring and mixing at the speed of 500rpm until all the calcium lignosulfonate, the sodium polystyrene sulfonate and the lithium hydroxide are dissolved, heating to 60 ℃, stirring at the same speed for reaction for 4 hours, stopping stirring, maintaining the constant temperature of 60 ℃, and standing for 12 hours to obtain a component I; mixing 1.5 parts of molasses with 1 part of liquid aluminum dihydrogen phosphate, stirring at the stirring speed of 1000rpm, preheating to 40 ℃, maintaining the state for 30min to obtain a molasses diluted solution, then heating the molasses diluted solution to 115 ℃, adding 1.3 parts of sulfamic acid, stirring the mixture at the stirring speed of 1500rpm for 4h, and cooling to room temperature to obtain a component II; and finally, stirring and mixing the component I and the component II at the stirring speed of 1500rpm at the temperature of 60 ℃ to obtain a mixed system with the pH value of 7, simultaneously adding 20 parts of saturated sodium chloride solution and 73.2 parts of distilled water, continuously stirring at the stirring speed of 500rpm for 30min, then cooling to room temperature and stopping stirring, standing for layering, taking an oil layer and filtering to obtain a liquid curing agent.
Example 6
Adding 7 parts of distilled water into a glass bottle with magnetons, sequentially adding 0.4 part of calcium lignosulfonate, 0.9 part of sodium polystyrene sulfonate and 1.7 parts of lithium hydroxide at room temperature, stirring and mixing at the speed of 500rpm until all the calcium lignosulfonate, the sodium polystyrene sulfonate and the lithium hydroxide are dissolved, heating to 50 ℃, stirring at the same speed for reacting for 4 hours, stopping stirring, maintaining the constant temperature of 60 ℃, and standing for 12 hours to obtain a component I; mixing 1 part of molasses and 1 part of liquid aluminum dihydrogen phosphate, stirring at the stirring speed of 1000rpm, preheating to 30 ℃, maintaining the operation state for 30min to obtain a molasses diluted solution, then heating the molasses diluted solution to 90 ℃, adding 0.8 part of sulfamic acid, stirring the mixture at the stirring speed of 1500rpm for 4h, and cooling to room temperature to obtain a component II; and finally, stirring and mixing the component I and the component II at the stirring speed of 1500rpm at 50 ℃ to obtain a mixed system with the pH value of 7, adding 10 parts of saturated sodium chloride solution and 84.2 parts of distilled water, continuously stirring at the stirring speed of 500rpm for 30min, cooling to room temperature, stopping stirring, standing for layering, taking an oil layer, and filtering to obtain a liquid curing agent.
Example 7
Adding 7 parts of distilled water into a glass bottle with magnetons, sequentially adding 0.4 part of calcium lignosulfonate, 0.9 part of sodium polystyrene sulfonate and 1.7 parts of lithium hydroxide at room temperature, stirring and mixing at the speed of 500rpm until all the calcium lignosulfonate, the sodium polystyrene sulfonate and the lithium hydroxide are dissolved, heating to 60 ℃, continuously stirring at the same speed for reaction for 4 hours, stopping stirring, and then maintaining the constant temperature of 70 ℃ for standing for 12 hours to obtain a component I; mixing 1.6 parts of molasses with 1 part of liquid aluminum dihydrogen phosphate, stirring at the stirring speed of 1000rpm, preheating to 50 ℃, maintaining the state for 30min to obtain a molasses diluted solution, heating the molasses diluted solution to 125 ℃, adding 8.1 parts of sulfamic acid, stirring the mixture at the stirring speed of 1500rpm for 4h, and cooling to room temperature to obtain a component II; and finally, stirring and mixing the component I and the component II at the stirring speed of 1500rpm at 70 ℃ to obtain a mixed system with the pH value of 7, adding 30 parts of saturated sodium chloride solution and a plurality of parts of distilled water, continuously stirring at the stirring speed of 500rpm for 30min, cooling to room temperature, stopping stirring, standing for layering, taking an oil layer, and filtering to obtain a liquid curing agent.
Example 8
Adding 7 parts of distilled water into a glass bottle with magnetons, sequentially adding 0.2 part of calcium lignosulfonate, 1.0 part of sodium polystyrene sulfonate and 1.8 parts of lithium hydroxide at room temperature, stirring and mixing at 500rpm until all the components are dissolved, heating to 60 ℃, continuously stirring at the same speed for reaction for 4 hours, stopping stirring, maintaining the constant temperature of 70 ℃, and standing for 12 hours to obtain a component I; mixing 1.6 parts of molasses with 1 part of liquid aluminum dihydrogen phosphate, stirring at the stirring speed of 1000rpm, preheating to 50 ℃, maintaining the state for 30min to obtain a molasses diluted solution, heating the molasses diluted solution to 125 ℃, adding 1.3 parts of sulfamic acid, stirring the mixture at the stirring speed of 1500rpm for 4h, and cooling to room temperature to obtain a component II; and finally, stirring and mixing the component I and the component II at the stirring speed of 1500rpm at 70 ℃ to obtain a mixed system with the pH value of 7, adding 30 parts of saturated sodium chloride solution and 63.1 parts of distilled water, continuously stirring at the stirring speed of 500rpm for 30min, cooling to room temperature, stopping stirring, standing for layering, taking an oil layer, and filtering to obtain a liquid curing agent.
Example 9
Adding 7 parts of distilled water into a glass bottle with magnetons, sequentially adding 0.5 part of calcium lignosulfonate, 0.9 part of sodium polystyrene sulfonate and 1.7 parts of lithium hydroxide at room temperature, stirring and mixing at the speed of 500rpm until all the calcium lignosulfonate, the sodium polystyrene sulfonate and the lithium hydroxide are dissolved, heating to 60 ℃, continuously stirring at the same speed for reaction for 4 hours, stopping stirring, and then maintaining the constant temperature of 70 ℃ for standing for 12 hours to obtain a component I; mixing 1.6 parts of molasses with 1 part of liquid aluminum dihydrogen phosphate, stirring at the stirring speed of 1000rpm, preheating to 50 ℃, maintaining the state for 30min to obtain a molasses diluted solution, heating the molasses diluted solution to 125 ℃, adding 1.4 parts of sulfamic acid, stirring the mixture at the stirring speed of 1500rpm for 4h, and cooling to room temperature to obtain a component II; and finally, stirring and mixing the component I and the component II at the stirring speed of 1500rpm at the temperature of 70 ℃, controlling the mixing ratio of the component I to the component II to be 1.1:1, obtaining a mixed system with the pH value of 7, simultaneously adding 30 parts of saturated sodium chloride solution and 63 parts of distilled water, continuously stirring at the stirring speed of 500rpm for 30min, cooling to room temperature, stopping stirring, standing for layering, taking an oil layer, and filtering to obtain a liquid curing agent.
Example 10
Adding 7 parts of distilled water into a glass bottle with magnetons, sequentially adding 0.4 part of calcium lignosulfonate, 0.9 part of sodium polystyrene sulfonate and 1.7 parts of lithium hydroxide at room temperature, stirring and mixing at the speed of 500rpm until all the calcium lignosulfonate, the sodium polystyrene sulfonate and the lithium hydroxide are dissolved, heating to 60 ℃, continuously stirring at the same speed for reaction for 4 hours, stopping stirring, and then maintaining the constant temperature of 70 ℃ for standing for 12 hours to obtain a component I; mixing 1.6 parts of molasses with 1 part of liquid aluminum dihydrogen phosphate, stirring at the stirring speed of 1000rpm, preheating to 50 ℃, maintaining the state for 30min to obtain a molasses diluted solution, heating the molasses diluted solution to 125 ℃, adding 1.5 parts of sulfamic acid, stirring the mixture at the stirring speed of 1500rpm for 4h, and cooling to room temperature to obtain a component II; and finally, stirring and mixing the component I and the component II at the stirring speed of 1500rpm at 70 ℃ to obtain a mixed system with the pH value of 7, adding 10 parts of saturated sodium chloride solution and 82.9 parts of distilled water, continuously stirring at the stirring speed of 500rpm for 30min, cooling to room temperature, stopping stirring, standing for layering, taking an oil layer, and filtering to obtain the liquid curing agent.
The performance test method of the curing agent is implemented according to the road engineering inorganic binder stable material test regulation (JTG E51-2009-T0841) and the soil curing admixture (CJ/T486-2015) of the industry standard, and the 7-day unconfined compressive strength and water absorption of the curing agent on soil are respectively tested, wherein clay, silt and sandy soil are used as aggregates, 0.05% of the curing agent is added, and 3% of lime and 3% of cement are added as auxiliary materials without special description. The unconfined compressive strength in 7 days is obtained by preserving standard test pieces for 7 days, measuring the strength according to the specification, and taking the average value of 6 standard test pieces in one group; the water absorption rate is that after the standard test piece is cured for 6 days, the weight gain rate is calculated by weighing.
TABLE 1 Properties of the cured Clay with different curing agent ratios
As can be seen from Table 1, the soil formula curing agent of the invention can obtain a 7-day unconfined compressive strength value of more than 3.5MPa when subjected to clay soil compression testing according to testing standards, the 7-day unconfined compressive strength value of not more than 2.5MPa far exceeds the 7-day unconfined compressive strength value under the same conditions reported in the existing patent documents, and the blank control strength without the curing agent is 3.50MPa, which indicates that the curing agent can adjust the compression strength by changing the formula composition. The clay soil curing agent shows excellent clay soil curing strength performance.
TABLE 2 curing Properties of preferred curatives on various soils
Moreover, the results in table 2 show that the curing agent formula of the invention not only has extremely strong curing performance on clay soil, but also shows better curing performance on silt and sandy soil, and shows higher compressive strength than that without the curing agent.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A strength-enhanced bio-based liquid soil stabilizer comprising: the composite material comprises a component I and a component II, and is characterized in that the component I comprises calcium lignosulfonate, sodium polystyrene sulfonate and lithium hydroxide, the total amount of the component I is controlled to be 3 parts, the part range of the calcium lignosulfonate is controlled to be 0.2-0.5 part, the part range of the sodium polystyrene sulfonate is controlled to be 0.7-1.1 part, and the part range of the lithium hydroxide is controlled to be 1.2-1.8 parts; the component II comprises molasses, aluminum dihydrogen phosphate, sulfamic acid or sodium sulfamate, the proportion of the molasses to the aluminum dihydrogen phosphate in the component II ranges from 1 to 1.6, and the amount of the sulfamic acid or the sodium sulfamate is 0.4 to 0.6 times of the total weight of the molasses and the aluminum dihydrogen phosphate; the liquid medicine also comprises distilled water and a saturated sodium chloride solution, wherein the part of the saturated sodium chloride solution is 10-30 parts.
2. The bio-based liquid soil stabilizer according to claim 1, wherein all of the ingredients contained in the component I and the component II are technical grade.
3. The bio-based liquid soil solidifying agent according to claim 1, wherein the organic substance is a bio-based material or a bio-based derivative material.
4. A preparation method of a bio-based liquid soil stabilizer with improved strength comprises the following steps:
1) respectively adding calcium lignosulfonate, sodium polystyrene sulfonate and lithium hydroxide into 7 parts of 50-70 ℃ distilled water, stirring and mixing until all the calcium lignosulfonate, the sodium polystyrene sulfonate and the lithium hydroxide are dissolved, stirring and reacting for not less than 4 hours, and standing for not less than 12 hours at constant temperature to obtain a component I;
2) mixing molasses and liquid aluminum dihydrogen phosphate according to a preset weight ratio, quickly stirring and preheating to a certain temperature, maintaining the operation state for at least half an hour to obtain a molasses diluted solution, then heating the molasses diluted solution to the preset temperature, adding sulfamic acid or sodium sulfamate with the preset weight into the molasses diluted solution, then stirring the mixture at a high speed for not less than 4 hours, and cooling to room temperature to obtain a component II;
3) mixing the component I and the component II at a preset temperature by high-speed stirring, and adjusting the two
Controlling the pH value of the curing agent to be 6-8 according to the proportion of the adding amount, simultaneously adding a preset amount of saturated sodium chloride solution, continuously stirring for half an hour, then cooling to room temperature, stopping stirring, standing for layering, taking an oil layer, and filtering to obtain the liquid curing agent.
5. The method according to claim 4, wherein the preheating temperature in the component II is in the range of 30 to 50 ℃.
6. The method according to claim 4, wherein the heating reaction temperature in the component II is in the range of 90 to 125 ℃.
7. The method as claimed in claim 4, wherein the reaction temperature of the mixture of the component I and the component II is 50 to 70 ℃.
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