CN111378150A - Cold-recycling asphalt emulsifier and preparation method thereof - Google Patents
Cold-recycling asphalt emulsifier and preparation method thereof Download PDFInfo
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- CN111378150A CN111378150A CN201811636554.5A CN201811636554A CN111378150A CN 111378150 A CN111378150 A CN 111378150A CN 201811636554 A CN201811636554 A CN 201811636554A CN 111378150 A CN111378150 A CN 111378150A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
- C08J3/03—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08H—DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
- C08H6/00—Macromolecular compounds derived from lignin, e.g. tannins, humic acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2395/00—Bituminous materials, e.g. asphalt, tar or pitch
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention discloses a cold recycled asphalt emulsifier and a preparation method thereof. The preparation of the emulsifier comprises the following steps: adding amine into the lignin solution to prepare a mixed solution; adding aldehyde into the mixed solution, and reacting for a period of time; and then adding alkylphenol polyether and quaternary ammonium salt surfactant, and reacting for a period of time to obtain the cold recycled asphalt emulsifier. The emulsifier has strong emulsifying capacity, the prepared emulsified asphalt has excellent storage stability and adhesiveness, and the cold-recycling asphalt mixture prepared by the emulsifier has good road performance, and all the performances meet the technical indexes of the cationic emulsified asphalt standard and the mixing performance established by the department of transportation. In addition, the emulsifier disclosed by the invention is simple in synthesis process, mild in reaction condition and easy to realize industrialization.
Description
Technical Field
The invention relates to the field of road building materials, in particular to a cold-recycling asphalt emulsifier and a preparation method thereof.
Background
Compared with the traditional asphalt pavement maintenance mode, the asphalt pavement regeneration can save a large amount of raw materials such as asphalt, gravel and the like, save engineering investment, and simultaneously is beneficial to waste treatment and environmental protection, thereby having remarkable economic and social benefits. With the concern of people on environmental protection and social benefits and the technical progress, the recycling technology of asphalt pavements is more and more paid attention by people. The research on recycling of asphalt pavement in foreign countries is started from 1915 in the United states at first, and the amount of the recycled asphalt mixture in the United states is almost half of that of the asphalt mixture for all roads by the end of the eighties of the last century. The asphalt pavement regeneration technology in China starts late, but with the rapid development of economy, people pay more and more attention to green economy and circular economy, and under the large background that stones face exhaustion in the field of highway construction, the restoration of a highway by adopting the regeneration technology is an important development target.
The emulsifier plays an important role in the cold regeneration technology, the application performance of the emulsifier is influenced by a plurality of factors such as application environment, carriers and the like, and the main structure of the emulsifier generally comprises amido polyamine, lignin amine, biquaternary ammonium salt and the like. The related patents for preparing the emulsifier which are disclosed at present are less, wherein the related patents comprise a US patent US6077888, a patent CN1367206 applied by Japan Kao corporation in China and the like, and the emulsifier technologies of patents CN104311833, CN103113618, CN104387595, CN104693050, CN103073731 and the like are successively disclosed in recent years and China, but the number of products which can meet the engineering requirements is very small, so that the popularization and application of the cold regeneration technology in China are limited.
Disclosure of Invention
In order to solve the problems of high mixing amount of the emulsifier for cold recycling, weak emulsifying capacity and poor storage stability and adhesion of emulsified asphalt in practical engineering, the invention provides the polyhydroxyamine modified lignin cold recycled asphalt emulsifier, and the multiple hydroxyl groups are introduced into the molecular structure, so that the emulsifying capacity of the emulsifier is effectively improved, and the storage stability and the adhesion of the emulsified asphalt are improved to a certain extent.
One of the purposes of the invention is to provide a cold-recycling asphalt emulsifier. The cold recycled asphalt emulsifier has the advantages of excellent performance, simple synthesis process, mild reaction conditions and easy realization of industrialization.
The second purpose of the invention is to provide a preparation method of the cold recycled asphalt emulsifier.
The purpose of the invention is realized by the following technical scheme:
the invention provides a cold-recycling asphalt emulsifier, and the specific structure of the emulsifier is shown as (I).
Wherein R is C1-C8Linear alkyl radical of (2), R1Is H, methyl, ethyl, tert-butyl, phenyl or benzyl.
The invention also provides a preparation method of the cold-recycling asphalt emulsifier, which comprises the following steps:
(1) adding amine into the lignin solution to prepare a mixed solution, wherein the mass ratio of the added amine to the lignin is 1: 2-2: 1;
(2) heating to 30-70 ℃, adding aldehyde into the mixed solution in the step (1), wherein the mass ratio of the added aldehyde to the amine in the step (1) is 1: 4-1: 1, adjusting the temperature to 50-90 ℃, and reacting for 3-8 hours;
(3) adding alkylphenol polyether and quaternary ammonium salt surfactant into the solution obtained after the reaction in the step (2), wherein the mass ratio of the added alkylphenol polyether to the quaternary ammonium salt surfactant to the lignin in the step (1) is 1: 0.05-1.0: 0.5-3, and reacting for 1-3 hours to obtain the cold recycled asphalt emulsifier;
the lignin solution in the step (1) is prepared by the following method: firstly adding lignin into water, then adding alkali to adjust the pH value of the solution to 9.0-11.0, and stirring until the lignin is completely dissolved to obtain the lignin solution.
In the step (1), the lignin is any one of softwood lignin, hardwood lignin and gramineous lignin.
In the step (1), the amine is a compound with a structure shown in a formula (II):
wherein R is C1～C8Linear alkyl group of (1).
In the step (2), the aldehyde is a compound with a structure shown in a formula (III):
wherein R is1Is H, methyl, ethyl, tert-butyl, phenyl or benzyl.
In the step (3), the alkylphenol polyether is one or two of nonylphenol polyoxyethylene ether and octylphenol polyoxyethylene ether which are mixed in any proportion; the number average molecular weight of the alkylphenol polyether is 500-2500.
The quaternary ammonium salt surfactant in the step (3) is any one or a mixture of dodecyl trimethyl ammonium chloride, tetradecyl trimethyl ammonium chloride, hexadecyl trimethyl ammonium chloride, octadecyl trimethyl ammonium chloride and N- (3-octadecyl amino-2-hydroxyl) propyl-trimethyl ammonium chloride.
The invention discloses an application of a cold-recycling asphalt emulsifier in preparation of cold-recycling emulsified asphalt. Wherein the addition amount of the emulsifier is 1.5-3.0 wt% of the mass of the emulsified asphalt.
The cold-recycling asphalt emulsifier has strong emulsifying capacity, the prepared emulsified asphalt has excellent storage stability and adhesiveness, and the cold-recycling asphalt mixture prepared by the cold-recycling asphalt emulsifier has good road performance, and all the performances meet the technical indexes of the standard and the mixing performance of the cationic emulsified asphalt established by the department of transportation. In addition, the emulsifier disclosed by the invention is simple in synthesis process, mild in reaction condition and easy to realize industrialization.
Detailed Description
The present invention will be described in further detail with reference to the following examples, but the present invention is not limited to the following examples. The present invention includes various alterations and modifications made by those skilled in the art based on the above technical ideas and conventional means, and is intended to be included in the scope of the present invention.
Example 1
Adding 10.0g of needle leaf lignin and 25g of water into a round-bottom flask, then adding alkali to adjust the pH value to 10.0, stirring until the lignin is completely dissolved, adding 9.8g of meglumine, heating to 30 ℃, then adding 4.1g of benzaldehyde, adjusting the temperature to 50 ℃, reacting for 5 hours, then adding 10g of nonylphenol polyoxyethylene ether (NP-20) and 1.0g of dodecyl trimethyl ammonium chloride, and stirring to react for 1 hour to obtain the cold recycled asphalt emulsifier.
Adding water into 25.0g of the synthesized cold recycled asphalt emulsifier to 370g, stirring and heating to 55 ℃ to obtain asphalt emulsifier soap solution.
630g of SK70# asphalt is taken and heated to 138 ℃, the soap solution is heated to 60 ℃, the asphalt and the soap solution are mixed and then are prepared into asphalt emulsion through a colloid mill, and uniform and fine cation slow-breaking emulsified asphalt is obtained.
Preparing an asphalt mixture: taking aggregate as a reference, 36.0% of RAP (0-5), 27.0% of RAP (5-10), 25.0% of RAP (0-5), 10.0% of new material (10-20), 2.0% of mineral powder, 1.5% of cement, 3.5% of emulsified asphalt and 2.5% of water. Dry, wet and freeze-thaw splitting tests of the cold-recycled emulsified asphalt mixture were performed under the gradation.
TABLE 1 Cold recycled emulsified asphalt Properties
TABLE 2 Properties of Cold recycled asphalt mixture
As can be seen from the results in tables 1 and 2, the storage stability and adhesion of the emulsified asphalt using the cold recycled asphalt emulsifier prepared in example 1 are significantly better than the index requirements in the relevant specifications, and the performance of the asphalt mixture is also better than the index requirements.
Example 2
Adding 10.0g of broad-leaved wood lignin and 20g of water into a round-bottom flask, then adding alkali to adjust the pH value to 9.0, stirring until the lignin is completely dissolved, adding 5.0g of ethylamine, heating to 70 ℃, then adding 5.0g of formaldehyde, adjusting the temperature to 90 ℃, reacting for 3 hours, then adding 12g of nonylphenol polyoxyethylene ether (NP-30) and 2.0g of tetradecyltrimethyl ammonium chloride, and stirring to react for 1 hour to obtain the cold recycled asphalt emulsifier.
And (3) adding water into 20.0g of the synthesized cold recycled asphalt emulsifier to 370g, stirring and heating to 55 ℃ to obtain asphalt emulsifier soap solution.
630g of SK70# asphalt is taken and heated to 138 ℃, the soap solution is heated to 60 ℃, the asphalt and the soap solution are mixed and then are prepared into asphalt emulsion through a colloid mill, and uniform and fine cation slow-breaking emulsified asphalt is obtained.
Preparing an asphalt mixture: taking aggregate as a reference, 36.0% of RAP (0-5), 27.0% of RAP (5-10), 25.0% of RAP (0-5), 10.0% of new material (10-20), 2.0% of mineral powder, 1.5% of cement, 3.5% of emulsified asphalt and 2.5% of water. Dry, wet and freeze-thaw splitting tests of the cold-recycled emulsified asphalt mixture were performed under the gradation.
TABLE 3 Properties of Cold-recycled emulsified asphalt
TABLE 4 Properties of Cold-recycled asphalt mixtures
As can be seen from the results in tables 3 and 4, the storage stability and adhesion of the emulsified asphalt using the cold recycled asphalt emulsifier prepared in example 2 are significantly better than the index requirements in the relevant specifications, and the performance of the asphalt mixture is also better than the index requirements.
Example 3
Adding 15.0g of gramineae lignin and 35g of water into a round-bottom flask, then adding alkali to adjust the pH value to 11.0, stirring until the lignin is completely dissolved, adding 25.0g of dioctylamine, heating to 50 ℃, then adding 13.0g of acetaldehyde, adjusting the temperature to 80 ℃, reacting for 6 hours, adding 15g of nonylphenol polyoxyethylene ether (NP-40) and 2.3g of hexadecyl trimethyl ammonium chloride, and stirring to react for 3 hours to obtain the cold recycled asphalt emulsifier.
Taking 28.0g of the synthesized cold recycled asphalt emulsifier, adding water to 370g, stirring and heating to 55 ℃ to obtain asphalt emulsifier soap solution.
630g of SK70# asphalt is taken and heated to 138 ℃, the soap solution is heated to 60 ℃, the asphalt and the soap solution are mixed and then are prepared into asphalt emulsion through a colloid mill, and uniform and fine cation slow-breaking emulsified asphalt is obtained.
Preparing an asphalt mixture: taking aggregate as a reference, 36.0% of RAP (0-5), 27.0% of RAP (5-10), 25.0% of RAP (0-5), 10.0% of new material (10-20), 2.0% of mineral powder, 1.5% of cement, 3.5% of emulsified asphalt and 2.5% of water. Dry, wet and freeze-thaw splitting tests of the cold-recycled emulsified asphalt mixture were performed under the gradation.
TABLE 5 Properties of Cold-recycled emulsified asphalt
TABLE 6 Properties of Cold-recycled asphalt mixtures
As can be seen from the results in tables 5 and 6, the emulsified asphalt using the cold recycled asphalt emulsifier prepared in example 3 has significantly better storage stability and adhesiveness than the index requirements in the relevant specifications, and the asphalt mixture has better performance than the index requirements.
Example 4
Adding 12.5g of needle leaf lignin and 30g of water into a round-bottom flask, then adding alkali to adjust the pH value to 10.5, stirring until the lignin is completely dissolved, adding 25.0g of meglumine, heating to 40 ℃, then adding 13.0g of propionaldehyde, adjusting the temperature to 70 ℃, reacting for 4 hours, adding 12.5g of octyl phenol polyoxyethylene ether (OP-30) and 1.3g of octadecyl trimethyl ammonium chloride, and stirring to react for 2 hours to obtain the cold regenerated asphalt emulsifier.
And (3) adding water into 30.0g of the synthesized cold recycled asphalt emulsifier to 370g, stirring and heating to 55 ℃ to obtain asphalt emulsifier soap solution.
630g of SK70# asphalt is taken and heated to 138 ℃, the soap solution is heated to 60 ℃, the asphalt and the soap solution are mixed and then are prepared into asphalt emulsion through a colloid mill, and uniform and fine cation slow-breaking emulsified asphalt is obtained.
Preparing an asphalt mixture: taking aggregate as a reference, 36.0% of RAP (0-5), 27.0% of RAP (5-10), 25.0% of RAP (0-5), 10.0% of new material (10-20), 2.0% of mineral powder, 1.5% of cement, 3.5% of emulsified asphalt and 2.5% of water. Dry, wet and freeze-thaw splitting tests of the cold-recycled emulsified asphalt mixture were performed under the gradation.
TABLE 7 Cold recycled emulsified asphalt Properties
TABLE 8 Cold recycled asphalt mixture Properties
As can be seen from the results in tables 7 and 8, the emulsified asphalt using the cold recycled asphalt emulsifier prepared in example 4 has significantly better storage stability and adhesiveness than the index requirements in the relevant specifications, and the asphalt mixture has better performance than the index requirements.
Example 5
Adding 10.0g of broad-leaved lignin and 30g of water into a round-bottom flask, then adding alkali to adjust the pH value to 9.5, stirring until the lignin is completely dissolved, adding 12.5g of glumine, heating to 60 ℃, then adding 5.8g of phenylacetaldehyde, adjusting the temperature to 60 ℃, reacting for 8 hours, then adding 8.5g of octyl phenol polyoxyethylene ether (OP-40) and 1.0g of 1.0g N- (3-octadecylamino-2-hydroxy) propyl-trimethyl ammonium chloride, stirring and reacting for 1.5 hours, and thus obtaining the cold recycled asphalt emulsifier.
15.0g of the synthesized cold recycled asphalt emulsifier is taken, water is added to 370g, and the temperature is raised to 55 ℃ by stirring to obtain the asphalt emulsifier soap solution.
630g of SK70# asphalt is taken and heated to 138 ℃, the soap solution is heated to 60 ℃, the asphalt and the soap solution are mixed and then are prepared into asphalt emulsion through a colloid mill, and uniform and fine cation slow-breaking emulsified asphalt is obtained.
Preparing an asphalt mixture: taking aggregate as a reference, 36.0% of RAP (0-5), 27.0% of RAP (5-10), 25.0% of RAP (0-5), 10.0% of new material (10-20), 2.0% of mineral powder, 1.5% of cement, 3.5% of emulsified asphalt and 2.5% of water. Dry, wet and freeze-thaw splitting tests of the cold-recycled emulsified asphalt mixture were performed under the gradation.
TABLE 9 Cold recycled emulsified asphalt Properties
TABLE 10 Cold recycled asphalt mixture Properties
As can be seen from the results in tables 9 and 10, the emulsified asphalt using the cold recycled asphalt emulsifier prepared in example 5 has significantly better storage stability and adhesiveness than the index requirements in the relevant specifications, and the asphalt mixture has better performance than the index requirements.
Example 6
Adding 20.0g of gramineous lignin and 25g of water into a round-bottom flask, then adding alkali to adjust the pH value to 10.0, stirring until the lignin is completely dissolved, adding 18.5g of meglumine, heating to 45 ℃, then adding 8.2g of formaldehyde, adjusting the temperature to 75 ℃, reacting for 6 hours, then adding 18.0g of octyl phenol polyoxyethylene ether (OP-20), 1.0g of hexadecyl trimethyl ammonium chloride and 1.0g of N- (3-octadecyl-2-hydroxyl) propyl-trimethyl ammonium chloride, stirring and reacting for 2 hours, thus obtaining the cold recycled asphalt emulsifier.
Taking 23.0g of the synthesized cold recycled asphalt emulsifier, adding water to 370g, stirring and heating to 55 ℃ to obtain asphalt emulsifier soap solution.
630g of SK70# asphalt is taken and heated to 138 ℃, the soap solution is heated to 60 ℃, the asphalt and the soap solution are mixed and then are prepared into asphalt emulsion through a colloid mill, and uniform and fine cation slow-breaking emulsified asphalt is obtained.
Preparing an asphalt mixture: taking aggregate as a reference, 36.0% of RAP (0-5), 27.0% of RAP (5-10), 25.0% of RAP (0-5), 10.0% of new material (10-20), 2.0% of mineral powder, 1.5% of cement, 3.5% of emulsified asphalt and 2.5% of water. Dry, wet and freeze-thaw splitting tests of the cold-recycled emulsified asphalt mixture were performed under the gradation.
TABLE 11 Cold recycled emulsified asphalt Properties
TABLE 12 Properties of Cold-recycled asphalt mixtures
As can be seen from the results in tables 11 and 12, the emulsified asphalt using the cold recycled asphalt emulsifier prepared in example 6 has significantly better storage stability and adhesion than the index requirements in the relevant specifications, and the asphalt mixture has better performance than the index requirements.
Example 7
Adding 20.0g of needle leaf lignin and 35g of water into a round-bottom flask, then adding alkali to adjust the pH value to 11.0, stirring until the lignin is completely dissolved, adding 13.5g of glufosinate, heating to 65 ℃, then adding 7.8g of pivalaldehyde, adjusting the temperature to 55 ℃, reacting for 4 hours, adding 15.0g of octyl phenol polyoxyethylene ether (OP-40) and 1.8g of 1.8g N- (3-octadecylamino-2-hydroxy) propyl-trimethyl ammonium chloride, stirring and reacting for 1 hour, and thus obtaining the cold recycled asphalt emulsifier.
And (3) adding 18.0g of the synthesized cold recycled asphalt emulsifier into 370g of water, stirring and heating to 55 ℃ to obtain asphalt emulsifier soap solution.
630g of SK70# asphalt is taken and heated to 138 ℃, the soap solution is heated to 60 ℃, the asphalt and the soap solution are mixed and then are prepared into asphalt emulsion through a colloid mill, and uniform and fine cation slow-breaking emulsified asphalt is obtained.
Preparing an asphalt mixture: taking aggregate as a reference, 36.0% of RAP (0-5), 27.0% of RAP (5-10), 25.0% of RAP (0-5), 10.0% of new material (10-20), 2.0% of mineral powder, 1.5% of cement, 3.5% of emulsified asphalt and 2.5% of water. Dry, wet and freeze-thaw splitting tests of the cold-recycled emulsified asphalt mixture were performed under the gradation.
TABLE 13 Properties of Cold-recycled emulsified asphalt
TABLE 14 Properties of Cold-recycled asphalt mixtures
As can be seen from the results in tables 13 and 14, the emulsified asphalt using the cold-recycled asphalt emulsifier prepared in example 7 has storage stability and adhesiveness significantly better than the index requirements in the relevant specifications, and the asphalt mixture has performance better than the index requirements.
Example 8
Adding 22.5g of needle leaf lignin and 35g of water into a round-bottom flask, then adding alkali to adjust the pH value to 9.5, stirring until the lignin is completely dissolved, adding 13.0g of gluglucoseamine, heating to 30 ℃, then adding 5.6g of benzaldehyde, adjusting the temperature to 50 ℃, reacting for 8 hours, then adding 13.5g of nonylphenol polyoxyethylene ether (NP-40) and 1.2g of dodecyl trimethyl ammonium chloride, and stirring to react for 2 hours to obtain the cold recycled asphalt emulsifier.
And (3) adding water into 20.0g of the synthesized cold recycled asphalt emulsifier to 370g, stirring and heating to 55 ℃ to obtain asphalt emulsifier soap solution.
630g of SK70# asphalt is taken and heated to 138 ℃, the soap solution is heated to 60 ℃, the asphalt and the soap solution are mixed and then are prepared into asphalt emulsion through a colloid mill, and uniform and fine cation slow-breaking emulsified asphalt is obtained.
Preparing an asphalt mixture: taking aggregate as a reference, 36.0% of RAP (0-5), 27.0% of RAP (5-10), 25.0% of RAP (0-5), 10.0% of new material (10-20), 2.0% of mineral powder, 1.5% of cement, 3.5% of emulsified asphalt and 2.5% of water. Dry, wet and freeze-thaw splitting tests of the cold-recycled emulsified asphalt mixture were performed under the gradation.
TABLE 15 Properties of Cold-recycled emulsified asphalt
TABLE 16 Properties of Cold-recycled asphalt mixtures
As can be seen from the results in tables 15 and 16, the emulsified asphalt using the cold recycled asphalt emulsifier prepared in example 8 has storage stability and adhesion significantly better than the index requirements in the relevant specifications, and the asphalt mixture has performance better than the index requirements.
Claims (8)
1. The cold-recycling asphalt emulsifier is characterized in that the concrete structure of the emulsifier is shown as (I)
Wherein R is C1-C8Linear alkyl radical of (2), R1Is H, methyl, ethyl, tert-butyl, phenyl or benzyl.
2. The preparation method of the cold-recycling asphalt emulsifier according to claim 1, which is characterized by comprising the following steps:
(1) adding amine into the lignin solution to prepare a mixed solution, wherein the mass ratio of the added amine to the lignin is 1: 2-2: 1;
(2) heating to 30-70 ℃, adding aldehyde into the mixed solution in the step (1), wherein the mass ratio of the added aldehyde to the amine in the step (1) is 1: 4-1: 1, adjusting the temperature to 50-90 ℃, and reacting for 3-8 hours;
(3) adding alkylphenol polyether and quaternary ammonium salt surfactant into the solution obtained after the reaction in the step (2), wherein the mass ratio of the added alkylphenol polyether to the quaternary ammonium salt surfactant to the lignin in the step (1) is 1: 0.05-1.0: 0.5-3, and reacting for 1-3 hours to obtain the cold recycled asphalt emulsifier;
the lignin solution in the step (1) is prepared by the following method: firstly adding lignin into water, then adding alkali to adjust the pH value of the solution to 9.0-11.0, and stirring until the lignin is completely dissolved to obtain the lignin solution.
3. The method for preparing a cold-recycling asphalt emulsifier according to claim 2, wherein the lignin in the step (1) is any one of softwood lignin, hardwood lignin and gramineous lignin.
4. The method for preparing the cold-recycling asphalt emulsifier according to claim 2, wherein the amine in the step (1) is a compound having a structure represented by the formula (II):
wherein R is C1～C8Linear alkyl group of (1).
5. The method for preparing the cold-recycling asphalt emulsifier according to claim 2, wherein the aldehyde in the step (2) is a compound having a structure shown in formula (III):
wherein R is1Is H, methyl, ethyl, tert-butyl, phenyl or benzyl.
6. The method for preparing the cold-recycling asphalt emulsifier according to claim 2, wherein the alkylphenol polyether in the step (3) is one or two of nonylphenol polyoxyethylene ether and octylphenol polyoxyethylene ether which are mixed in any proportion; the number average molecular weight of the alkylphenol polyether is 500-2500.
7. The method for preparing the cold-recycling asphalt emulsifier according to claim 2, wherein the quaternary ammonium surfactant in the step (3) is any one or a mixture of dodecyl trimethyl ammonium chloride, tetradecyl trimethyl ammonium chloride, hexadecyl trimethyl ammonium chloride, octadecyl trimethyl ammonium chloride and N- (3-octadecyl amino-2-hydroxy) propyl-trimethyl ammonium chloride.
8. The method for applying the cold recycled asphalt emulsifier in claim 1, wherein the cold recycled asphalt emulsifier is applied to the preparation of cold recycled emulsified asphalt, and the addition amount of the cold recycled asphalt emulsifier is 1.5-3.0 wt% of the mass of the emulsified asphalt.
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| CN107903397A (en) * | 2017-11-29 | 2018-04-13 | 沈阳化工研究院有限公司 | A kind of high-performance cold renewal type asphalt emulsifier and preparation method thereof |
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| US3871893A (en) * | 1971-04-16 | 1975-03-18 | Westvaco Corp | Lignin amines as asphalt emulsifiers |
| CN103073731A (en) * | 2012-12-25 | 2013-05-01 | 江苏博特新材料有限公司 | Preparation method of cold-recycling lignin asphalt emulsifier |
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| 周益同 等: "曼尼希反应合成碱木质素胺基多元醇的研究", 《现代化工》 * |
| 李晓霞: "多胺/葡萄糖改性木质素胺的制备和乳化性能研究", 《石油沥青》 * |
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| CN111378150B (en) | 2023-01-03 |
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