CN108358511B - Efficient soil curing agent and preparation method thereof - Google Patents
Efficient soil curing agent and preparation method thereof Download PDFInfo
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- CN108358511B CN108358511B CN201810233721.5A CN201810233721A CN108358511B CN 108358511 B CN108358511 B CN 108358511B CN 201810233721 A CN201810233721 A CN 201810233721A CN 108358511 B CN108358511 B CN 108358511B
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- agent
- curing agent
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- asphalt
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00732—Uses not provided for elsewhere in C04B2111/00 for soil stabilisation
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention belongs to the technical field of soil curing agents, and particularly relates to an efficient soil curing agent and a preparation method thereof, wherein the soil curing agent comprises asphalt, bonding resin, auxiliary resin, a reinforcing agent, a thickening agent and a water reducing agent, wherein the asphalt is medium-temperature asphalt, the molecular weight is 1650-1820, and the softening point is 72-84 ℃. The efficient soil curing agent is prepared by reasonably preparing each component and then heating and stirring. The invention has the advantages of simple and effective preparation method, wide application range of the prepared soil stabilizer and good curing effect.
Description
Technical Field
The invention belongs to the technical field of soil curing agents, and particularly relates to an efficient soil curing agent and a preparation method thereof.
Background
The soil curing agent can generate chemical action and physical action with soil to generate bonding to a certain degree, the compactness of the bonded soil is increased, the internal bonding force is enhanced, the bearing capacity is improved, the compressive strength is increased, and the soil curing agent can be used for building highways, water conservancy dams, ground pavement of various places and the like. However, most of the existing soil curing agents have the problem of poor curing effect, specifically, poor pressure resistance and poor scouring resistance, so that an efficient soil curing agent is urgently needed in the market.
The Chinese patent with patent publication No. CN103224370A and publication No. 2013.07.31 discloses a liquid powder soil curing agent and a preparation and use method thereof, which comprises a liquid agent, wherein the liquid agent is sodium asphalt sulfonate, inorganic salt, organic polymer and other surfactants; the preparation method comprises mixing and dissolving sodium asphalt sulfonate and other surfactants, adding and mixing inorganic salt and organic polymer, stirring, and reacting at 30-60 deg.C; the application method comprises the steps of firstly mixing the cement and the original soil, then spraying the soil curing agent on a mixture of the cement and the original soil, turning and uniformly mixing, and finally spreading the turned and uniformly mixed mixture on the ground and rolling.
However, the soil stabilizer in the patent of the invention has the problems of complicated preparation operation and poor curing and using effects.
Disclosure of Invention
The invention aims to provide an efficient soil stabilizer and a preparation method thereof, which can prepare the efficient soil stabilizer by reasonably preparing each component and then heating and stirring. The invention has the advantages of simple and effective preparation method, wide application range of the prepared soil stabilizer and good curing effect.
The technical scheme adopted by the invention for solving the problems is as follows: the high-efficiency soil curing agent comprises asphalt, bonding resin, auxiliary resin, a reinforcing agent, a thickening agent and a water reducing agent, wherein the asphalt is medium-temperature asphalt, the molecular weight is 1650-1820, and the softening point is 72-84 ℃.
In the invention, the soil stabilizer belongs to an organic polymerization stabilizer, wherein the medium-temperature asphalt is used as a main material, and other organic products are used as auxiliary components, so that the soil stabilizer has a better curing effect on different types of soil.
On the other hand, the medium temperature asphalt is medium temperature asphalt with higher molecular weight, because when the molecular weight is lower than 1600, the curing agent is easy to have the problem of slow preparation, and when the molecular weight is higher than 1850, namely high temperature asphalt, the curing agent is easy to have the problems of enough scouring resistance and insufficient pressure resistance.
The further preferred technical scheme is as follows: the bonding resin comprises one or a mixture of more of polyurethane, polyacrylate and epoxy resin; the auxiliary resin comprises one or more of furfural aniline, furfuryl alcohol resin and furfuryl ketone resin; the enhancer comprises one or more of calcium acrylate and magnesium acrylate; the thickening agent comprises one or more of polyacrylamide and polyacrylamide; the water reducing agent is one or a mixture of more of sodium carboxymethyl cellulose and calcium carboxymethyl cellulose.
In the invention, the binding resin and the auxiliary resin are mainly used for binding soil particles to enable the soil particles to tend to agglomerate, the reinforcing agent and the thickening agent are used for enabling the current on the surface of a soil micelle to be lower, finally ensuring the concentration of electrolyte to be enhanced, enabling the soil to agglomerate and expand, and filling gaps mutually, the water reducing agent is used for fixing free water in a crystal water mode, so that the problem of dehydration and softening of the soil is avoided, and the scouring resistance of the solidified soil is further improved by matching with the reinforcing agent.
The further preferable technical scheme is that the paint comprises the following components in percentage by weight:
medium temperature asphalt, 72-75%;
12-16% of polyacrylate;
3-9% of furfuryl ketone resin;
magnesium acrylate, 1.5-3.5%;
0.5-2.5% of polyacrylamide;
0.1-0.5% of calcium carboxymethyl cellulose.
The further preferable technical scheme is that the paint comprises the following components in percentage by weight:
medium temperature asphalt, 72%;
polyacrylate, 15%;
furfuryl ketone resin, 7%;
magnesium acrylate, 3%;
2.5 percent of polyacrylamide;
0.5 percent of carboxymethyl cellulose calcium.
A preparation method of a high-efficiency soil stabilizer sequentially comprises the following steps:
s1, heating the medium-temperature asphalt in a constant-temperature heating device, adding bonding resin after softening, and stirring uniformly to obtain a curing agent prediction;
s2, adding a reinforcing agent into the curing agent expectation, uniformly stirring, heating and keeping constant, adding the auxiliary resin, and uniformly stirring to obtain a medium-term curing agent;
s3, adding the thickening agent and the water reducing agent into the medium-term curing agent, cooling and keeping constant, and finally stirring uniformly;
and S4, cooling to obtain the high-efficiency soil stabilizer.
In the invention, the medium temperature asphalt, the binding resin, the reinforcing agent, the auxiliary resin, the thickening agent and the water reducing agent are combined in pairs, and the curing agent is prepared sequentially in three stages, compared with the mode of adding and mixing all at one time in the prior art, the invention has the following advantages:
firstly, the five auxiliary components are sequentially contacted and reacted with the medium-temperature asphalt to ensure uniform mixing;
secondly, the enhancer group needs the furfuryl alcohol structure in the auxiliary resin as a guide to effectively combine the enhancer group on the medium-temperature asphalt;
and thirdly, the water reducing agent is added finally, so that the early contact with the enhancer is avoided, and the problem that the enhancer group is not combined in place after expansion is caused is avoided.
The further preferred technical scheme is as follows: the heating constant temperature in the step S1 is 82-86 ℃, the heating constant temperature in the step S2 is 88-91 ℃, the heating constant temperature in the step S3 is 84-87 ℃, and the heating temperature in the step S3 is not lower than the step S1.
In the description, the temperature of the water reducing agent is relatively high during adding and stirring, so that the water reducing agent has the function of rapid water absorption and expansion.
The further preferred technical scheme is as follows: the stirring speed in steps S1, S2 and S3 is 260-300 rpm.
The further preferred technical scheme is as follows: the constant temperature heating method in steps S1, S2, and S3 includes metal bath heating, and infrared heating.
The further preferred technical scheme is as follows: keeping the curing agent in the step S1 at a constant temperature for 4-6h after the curing agent is prepared; and (4) keeping the constant temperature for 1-2h after the medium-term curing agent is prepared in the step S2.
The further preferred technical scheme is as follows: the cooling speed range in the step S4 is 5-8 ℃/min.
In the invention, if the temperature of the soil curing agent with higher temperature is reduced at the highest speed, the problems of non-uniform components and re-dissociation of reaction groups are easy to occur, so that the finally obtained soil curing agent can be effectively ensured to have stable and effective curing effect at the cooling speed of 5-8 ℃/min.
The efficient soil curing agent is prepared by reasonably preparing each component and then heating and stirring. The invention has the advantages of simple and effective preparation method, wide application range of the prepared soil stabilizer and good curing effect.
Detailed Description
The following description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention.
Example 1
S1, heating 72kg of medium-temperature asphalt in a constant-temperature infrared heating instrument at 84 ℃, softening, adding 15kg of polyacrylate, uniformly stirring at the speed of 260 revolutions per minute to obtain a curing agent prediction material, and then keeping the temperature for 4 hours;
s2, adding 3kg of magnesium acrylate into the curing agent expectation, uniformly stirring at the speed of 260 r/min, heating to 89 ℃ and keeping constant, adding 7kg of furfuryl ketone resin, uniformly stirring at the speed of 260 r/min to obtain a medium-term curing agent, and then keeping the temperature for 2 hours;
s3, adding 2.5kg of polyacrylamide and 0.5kg of carboxymethylcellulose calcium into the medium-term curing agent, cooling to 86 ℃, keeping constant, and finally uniformly stirring;
s4, cooling at the speed of 5 ℃/min to obtain the high-efficiency soil stabilizer 1.
Example 2
S1, heating 73kg of medium-temperature asphalt in a constant-temperature infrared heating instrument at 84 ℃, softening, adding 14kg of polyacrylate, uniformly stirring at 280 revolutions per minute to obtain a curing agent prediction material, and then keeping the temperature for 5 hours;
s2, adding 3kg of magnesium acrylate into the curing agent expectation, uniformly stirring at the speed of 280 revolutions per minute, heating to 89 ℃ and keeping constant, adding 7kg of furfuryl ketone resin, uniformly stirring at the speed of 280 revolutions per minute to obtain a medium-term curing agent, and then keeping the temperature for 1 hour;
s3, adding 2.5kg of polyacrylamide and 0.5kg of carboxymethylcellulose calcium into the medium-term curing agent, cooling to 86 ℃, keeping constant, and finally uniformly stirring;
s4, cooling at the speed of 5 ℃/min to obtain the high-efficiency soil stabilizer 2.
Example 3
S1, heating 75kg of medium-temperature asphalt in a constant-temperature infrared heating instrument at 85 ℃, softening, adding 12kg of polyacrylate, uniformly stirring at the speed of 300 revolutions per minute to obtain a curing agent prediction material, and then keeping the temperature for 6 hours;
s2, adding 3kg of magnesium acrylate into the curing agent expectation, uniformly stirring at the speed of 300 r/min, heating to 91 ℃ and keeping constant, adding 7kg of furfuryl ketone resin, uniformly stirring at the speed of 300 r/min to obtain a medium-term curing agent, and then keeping the temperature for 1.5 h;
s3, adding 2.5kg of polyacrylamide and 0.5kg of carboxymethylcellulose calcium into the medium-term curing agent, cooling to 87 ℃ and keeping constant, and finally uniformly stirring;
s4, cooling at the speed of 8 ℃/min to obtain the high-efficiency soil stabilizer 3.
The 3 examples were tested for "compression resilience modulus" and "scour resistance", with three groups of soil for testing, i.e., group a, group b, and group c, and 9 groups of data were obtained after cross experiments, wherein the three groups of soil were as follows:
it can be seen from the above figure that soil c has a higher water content and can be classified as a silt type, soil a has a higher organic matter and can be classified as planting humus, and soil b belongs to a balanced soil, so that the experimental subject has substantially represented a common soil type, and the test has higher effectiveness.
According to the existing curing method, the three soil samples are cured, and after the three soil samples are cured stably, the compression resistant modulus of resilience is tested, and the results are as follows:
according to the regulations of the design specifications of the highway asphalt pavement, the resilience modulus of the soil foundation is more than 30Mpa, and the figure shows that the soil curing agent can greatly improve the pressure resistance of the soil after being used, and completely reaches the national standard, so that the soil curing agent has the advantage of high curing effect.
Then, according to the existing standard, the other solidified soil is subjected to a scouring test, and the test results are as follows:
from the above table, it can be seen that after the soil curing agent of the present invention is used for curing, the mass loss rate of the obtained soil after a standard scouring experiment is controlled below 7%, so as to ensure that the soil has high scouring resistance, and further ensure that the soil curing agent of the present invention has the advantages of good curing ability and wide application range.
While the embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various modifications can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention. These are non-inventive modifications, which are intended to be protected by patent laws within the scope of the claims appended hereto.
Claims (8)
1. An efficient soil stabilizer is characterized in that: the asphalt comprises asphalt, bonding resin, auxiliary resin, a reinforcing agent, a thickening agent and a water reducing agent, wherein the asphalt is medium-temperature asphalt, the molecular weight is 1650-1820, and the softening point is 72-84 ℃;
the bonding resin comprises one or a mixture of more of polyurethane, polyacrylate and epoxy resin; the auxiliary resin comprises one or more of furfural aniline, furfuryl alcohol resin and furfuryl ketone resin; the enhancer comprises one or more of calcium acrylate and magnesium acrylate; the thickening agent comprises one or more of polyacrylamide and polyacrylamide; the water reducing agent is one or a mixture of more of sodium carboxymethyl cellulose and calcium carboxymethyl cellulose;
the preparation method of the high-efficiency soil stabilizer sequentially comprises the following steps:
s1, heating the medium-temperature asphalt in a constant-temperature heating device, adding bonding resin after softening, and stirring uniformly to obtain a curing agent prediction;
s2, adding a reinforcing agent into the curing agent expectation, uniformly stirring, heating and keeping constant, adding the auxiliary resin, and uniformly stirring to obtain a medium-term curing agent;
s3, adding the thickening agent and the water reducing agent into the medium-term curing agent, cooling and keeping constant, and finally stirring uniformly;
and S4, cooling to obtain the high-efficiency soil stabilizer.
2. The efficient soil solidifying agent of claim 1, which is characterized by comprising the following components in percentage by weight:
medium temperature asphalt, 72-75%;
12-16% of polyacrylate;
3-9% of furfuryl ketone resin;
magnesium acrylate, 1.5-3.5%;
0.5-2.5% of polyacrylamide;
0.1-0.5% of calcium carboxymethyl cellulose.
3. The efficient soil solidifying agent of claim 1, which is characterized by comprising the following components in percentage by weight:
medium temperature asphalt, 72%;
polyacrylate, 15%;
furfuryl ketone resin, 7%;
magnesium acrylate, 3%;
2.5 percent of polyacrylamide;
0.5 percent of carboxymethyl cellulose calcium.
4. The high-efficiency soil stabilizer according to claim 1, wherein: the heating constant temperature in the step S1 is 82-86 ℃, the heating constant temperature in the step S2 is 88-91 ℃, the heating constant temperature in the step S3 is 84-87 ℃, and the heating temperature in the step S3 is not lower than the step S1.
5. The high-efficiency soil stabilizer according to claim 1, wherein: the stirring speed in steps S1, S2 and S3 is 260-300 rpm.
6. The high-efficiency soil stabilizer according to claim 1, wherein: the constant temperature heating method in steps S1, S2, and S3 includes metal bath heating, and infrared heating.
7. The high-efficiency soil stabilizer according to claim 1, wherein: keeping the curing agent in the step S1 at a constant temperature for 4-6h after the curing agent is prepared; and (4) keeping the constant temperature for 1-2h after the medium-term curing agent is prepared in the step S2.
8. The high-efficiency soil stabilizer according to claim 1, wherein: the cooling speed range in the step S4 is 5-8 ℃/min.
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| CN109135761A (en) * | 2018-10-12 | 2019-01-04 | 西安同鑫伟业环保科技有限公司 | A kind of environment-friendly novel soil-solidified-agent |
| CN110055083B (en) * | 2019-05-29 | 2020-07-21 | 中科盛联(北京)新材料有限公司 | High-molecular soil curing agent and preparation method thereof |
| CN110819355A (en) * | 2019-11-29 | 2020-02-21 | 北京市首发天人生态景观有限公司 | Soil hardening agent and preparation method thereof |
| CN114316996B (en) * | 2021-12-15 | 2023-10-27 | 佛山市建盈发展有限公司 | Composite curing agent and preparation method thereof |
| CN115536308B (en) * | 2022-11-25 | 2023-03-10 | 江苏集萃功能材料研究所有限公司 | Novel composite soil body stabilizer and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01219211A (en) * | 1988-02-26 | 1989-09-01 | Takenaka Komuten Co Ltd | Protection method for cohesive soil |
| US8702343B1 (en) * | 2012-12-21 | 2014-04-22 | Midwest Industrial Supply, Inc. | Method and composition for road construction and surfacing |
| CN105367010A (en) * | 2015-10-30 | 2016-03-02 | 郑卫忠 | Hardening agent for road and roadbed hardening method |
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2018
- 2018-03-21 CN CN201810233721.5A patent/CN108358511B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01219211A (en) * | 1988-02-26 | 1989-09-01 | Takenaka Komuten Co Ltd | Protection method for cohesive soil |
| US8702343B1 (en) * | 2012-12-21 | 2014-04-22 | Midwest Industrial Supply, Inc. | Method and composition for road construction and surfacing |
| CN105367010A (en) * | 2015-10-30 | 2016-03-02 | 郑卫忠 | Hardening agent for road and roadbed hardening method |
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