CN111718588A - Modified emulsified asphalt and its production process and use - Google Patents
Modified emulsified asphalt and its production process and use Download PDFInfo
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- CN111718588A CN111718588A CN202010646627.XA CN202010646627A CN111718588A CN 111718588 A CN111718588 A CN 111718588A CN 202010646627 A CN202010646627 A CN 202010646627A CN 111718588 A CN111718588 A CN 111718588A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
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- 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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- 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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- 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
- C08J2413/00—Characterised by the use of rubbers containing carboxyl groups
- C08J2413/02—Latex
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2463/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2495/00—Bituminous materials, e.g. asphalt, tar or pitch
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The invention discloses modified emulsified asphalt and a production method and application thereof. The production method of the modified emulsified asphalt comprises the following steps: (1) stirring 20-60 parts by weight of matrix asphalt, 3-12 parts by weight of an emulsifier selected from a kerosene emulsifier or a white oil emulsifier, 30-60 parts by weight of water and 3-10 parts by weight of a solvent to obtain emulsified asphalt; (2) mixing 30-65 parts by weight of emulsified asphalt, 25-55 parts by weight of water-based epoxy resin and 3-9 parts by weight of carboxylic styrene-butadiene latex to obtain a mixture; (3) optionally, mixing the mixture with 4-10 parts by weight of a water-based epoxy resin curing agent to obtain the modified emulsified asphalt. The modified emulsified asphalt has good storage stability.
Description
Technical Field
The invention relates to modified emulsified asphalt, a production method and application thereof, in particular to waterborne epoxy resin modified emulsified asphalt, a production method and application thereof.
Background
The emulsified asphalt is oil-in-water or water-in-oil liquid asphalt produced by asphalt and emulsifier under certain technological action, and has low viscosity and good flowability at normal temperature. The water-based epoxy resin is a liquid material which takes epoxy resin as a dispersing agent and aqueous solution as a phase solvent, is matched with a corresponding curing agent for use, can be rapidly cured under the room temperature condition and the humid environment, and the cured product keeps the characteristics of high thermosetting property, high strength and strong binding power of the epoxy resin. The waterborne epoxy resin can improve the binding power and the strength of the emulsified asphalt. The water-based epoxy resin modified emulsified asphalt can be used as a bonding layer of a highway pavement, and can also be mixed with stone to be used as a cementing material of a sand fog sealing layer, a micro-surfacing, a cold-patch material, a cold-mixing mixture and a semi-flexible pavement. At present, hot-melt asphalt is mostly adopted for emulsified asphalt, and the asphalt is dispersed in an aqueous solution containing an emulsifier in fine micro-droplets through a colloid mill or high-speed shearing under the action of an emulsifying machine to form an asphalt emulsion. The storage time of the emulsified asphalt prepared by the method is generally not more than 7 days, and the emulsified asphalt cannot be stored for a long time.
CN109943282A discloses a preparation method of a water-based epoxy resin modified emulsified asphalt composite waterproof binding material. The water-based epoxy resin, emulsified asphalt, common styrene-butadiene latex, a defoaming agent, a coupling agent and an interface reinforcing agent are uniformly mixed to form a component A, the water-based epoxy curing agent is used as a component B, and A, B components are uniformly mixed when the water-based epoxy curing agent is applied. The water-based epoxy resin modified emulsified asphalt composite waterproof binding material obtained by the method has poor storage stability.
CN105462273A discloses an epoxy modified emulsified asphalt material and a preparation method thereof. The emulsified asphalt material comprises a component A and a component B; the component A comprises emulsified asphalt, a common SBS latex modifier, a cross-linking agent and an epoxy resin curing agent; the component B comprises epoxy resin, epoxy resin diluent, emulsifier A and solvent. The emulsified asphalt is prepared by mixing and grinding a soap solution prepared from high-temperature heavy-traffic asphalt, an emulsifier and water for emulsification. The epoxy modified emulsified asphalt material has high requirements on equipment and can not meet the requirement of long-term storage.
CN103980721B discloses a preparation method of epoxy compound emulsified asphalt. The method comprises the following steps: (1) uniformly stirring hot water and self-emulsifying water-based epoxy resin to obtain white emulsion; (2) adding matrix asphalt, and then adding a toughening agent and an aromatic hydrocarbon mixture to form a mixture; (3) shearing the mixture at high speed by using a high-speed emulsifier to obtain a component A; (4) and adding a diluent into the curing agent, and stirring to obtain the component B. The epoxy composite emulsified asphalt has high requirements on equipment and cannot meet the requirement on long-term storage.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a method for producing a modified emulsified asphalt, which has good storage stability and can be stored for a long period of time. Another object of the present invention is to provide a modified emulsified asphalt. It is a further object of the present invention to provide the use of a kerosene emulsifier or a white oil emulsifier. It is still another object of the present invention to provide use of the carboxylated styrene-butadiene latex. The technical problem is solved by the following technical scheme.
In one aspect, the invention provides a method for producing modified emulsified asphalt, which comprises the following steps:
(1) stirring 20-60 parts by weight of matrix asphalt, 3-12 parts by weight of an emulsifier selected from a kerosene emulsifier or a white oil emulsifier, 30-60 parts by weight of water and 3-10 parts by weight of a solvent to obtain emulsified asphalt;
(2) mixing 30-65 parts by weight of emulsified asphalt, 25-55 parts by weight of water-based epoxy resin and 3-9 parts by weight of carboxylic styrene-butadiene latex to obtain a mixture;
(3) optionally, mixing the mixture with 4-10 parts by weight of a water-based epoxy resin curing agent to obtain the modified emulsified asphalt.
According to the production method of the modified emulsified asphalt, the use amount of the emulsified asphalt is preferably 40-55 parts by weight, the use amount of the aqueous epoxy resin is 30-50 parts by weight, the use amount of the aqueous epoxy resin curing agent is 6-8 parts by weight, and the use amount of the carboxylated styrene-butadiene latex is 5-7 parts by weight.
According to the production method of the modified emulsified asphalt of the present invention, preferably, the solvent is selected from the group consisting of:
(1) aliphatic alkyl-substituted benzene having C1-C6, or
(2) Esters of C1-C10 aliphatic monohydric alcohols and C1-C6 aliphatic monohydric acids;
the matrix asphalt is heavy traffic asphalt.
According to the production method of the modified emulsified asphalt of the present invention, preferably, the step (1) comprises the following processes:
(a) uniformly stirring the molten matrix asphalt and the solvent to form a first mixture;
(b) uniformly stirring the first mixture and an emulsifier to form a second mixture;
(c) uniformly stirring the second mixture and water to obtain emulsified asphalt;
the stirring speed in the step (a) is 300-800 rpm, and the stirring time is 3-15 min;
the stirring speed in the step (b) is 600-1000 rpm, and the stirring time is 7-25 min;
the stirring speed in the step (c) is 600-1000 rpm, and the stirring time is 10-25 min.
According to the production method of the modified emulsified asphalt, the temperature of the molten matrix asphalt is preferably 70-120 ℃.
According to the production method of the modified emulsified asphalt, the waterborne epoxy resin is preferably a waterborne bisphenol A epoxy resin, the waterborne epoxy resin curing agent is a modified amine curing agent, and the emulsifier is a kerosene emulsifier.
According to the production method of the modified emulsified asphalt, the matrix asphalt is No. 70 asphalt, the aqueous epoxy resin is south Asia epoxy resin NPEW-291W53, the aqueous epoxy resin curing agent is FUSONE-01 water-soluble curing agent produced by Fuson electrical materials, Inc. of Guangzhou Fusong, and the carboxylated styrene-butadiene latex is carboxylated styrene-butadiene latex SD7623 produced by Pasteur.
On the other hand, the invention also provides modified emulsified asphalt which is prepared by the production method and does not have the phenomenon of sedimentation or agglomeration after being placed for 3 months at room temperature.
In a further aspect, the present invention provides the use of a kerosene emulsifier or a white oil emulsifier for improving the storage stability of an emulsified bitumen.
In a further aspect, the present invention provides the use of a carboxylated styrene-butadiene latex to improve the storage stability of an emulsified asphalt.
The modified emulsified asphalt of the invention takes the kerosene emulsifier or the white oil emulsifier as the emulsifier, and can be prepared by simple stirring, so that a colloid mill or a high-speed shearing machine is not needed, and the requirement on equipment is low. The emulsified asphalt provided by the invention is matched with carboxylic styrene-butadiene latex for use, and the prepared modified emulsified asphalt has good storage stability and can be stored for a long time.
Detailed Description
The present invention will be further described with reference to the following specific examples, but the scope of the present invention is not limited thereto.
The production method of the modified emulsified asphalt comprises the following steps: (1) preparing emulsified asphalt; (2) preparing a modified emulsified asphalt component A; optionally, (3) a step of mixing component A and component B. As described in detail below.
< step of preparing emulsified asphalt >
Stirring matrix asphalt, emulsifier (selected from kerosene emulsifier or white oil emulsifier), water and solvent to obtain emulsified asphalt.
The matrix asphalt of the invention can be heavy traffic asphalt; preferably one or more of asphalt No. 70 or asphalt No. 90; more preferably No. 70 bitumen. The base asphalt according to one embodiment of the present invention is asphalt No. 70 produced by SK group of korea. The using amount of the matrix asphalt is 20-60 parts by weight; preferably 30 to 50 parts by weight; more preferably 35 to 45 parts by weight. This can improve the storage stability of the modified emulsified asphalt.
The emulsifier of the invention can be a kerosene emulsifier or a white oil emulsifier; kerosene emulsifiers are preferred. The amount of the emulsifier is 3-12 parts by weight; preferably 5 to 10 parts by weight; more preferably 6 to 9 parts by weight. This can improve the storage stability of the modified emulsified asphalt.
Kerosene emulsifiers are generally used for the emulsification of kerosene, and the present invention is used for the emulsification of asphalt. The kerosene emulsifier can be a nonionic surfactant or a mixture formed by compounding various nonionic surfactants and auxiliaries. The nonionic surfactant includes fatty alcohol polyglycol ether, fatty acid polyglycol ester or alkylphenol polyglycol ether, etc. The chain length of the polyethylene glycol is increased, the hydrophilicity is increased, and the emulsifying effect is better. Examples of nonionic surfactants include, but are not limited to, nonylphenol polyethylene glycol ethers. The auxiliary agent comprises naphthalene, isopropyl naphthalene or diisopropyl naphthalene. This can improve the storage stability of the modified emulsified asphalt. The kerosene emulsifier of the present invention is preferably B268 kerosene emulsifier produced by Federal Fine chemical Co., Ltd. in Guangdong or MH-405 kerosene emulsifier produced by Jiangsu Maoheng chemical Co., Ltd.
White oil emulsifiers are commonly used in the emulsification of white oils, and the present invention is used in the emulsification of bitumens. The white oil emulsifier can be a nonionic surfactant or a mixture formed by compounding various nonionic surfactants and auxiliaries. The nonionic surfactant includes alkylphenol polyglycol ether and the like. The chain length of the polyethylene glycol is increased, the hydrophilicity is increased, and the emulsifying effect is better. Examples of nonionic surfactants include, but are not limited to, polyoxyethylene octylphenol ether-10. The auxiliary agent comprises naphthalene, isopropyl naphthalene or diisopropyl naphthalene. Specific examples of white oil emulsifiers include, but are not limited to, polyoxyethylene octylphenol ether-10 (OP-10). The white oil emulsifier of the present invention is preferably SH-105 white oil emulsifier produced by Jiangsu Maoheng chemical Co.
In the present invention, the amount of water may be 30 to 60 parts by weight; preferably 40 to 55 parts by weight; more preferably 45 to 50 parts by weight. This can improve the storage stability of the modified emulsified asphalt.
The solvent of the present invention may be selected from: (1) C1-C6 aliphatic alkyl substituted benzene, or (2) C1-C10 aliphatic monohydric alcohol and C1-C6 aliphatic monobasic acid ester. Preferably, the solvent may be one or more selected from aliphatic alkyl substituted benzene of C1-C3 or ester formed by aliphatic monohydric alcohol of C2-C6 and aliphatic monobasic acid of C1-C3. More preferably, the solvent is selected from one or more of toluene or butyl acetate. According to one embodiment of the invention, the solvent is xylene. The amount of the solvent may be 3 to 10 parts by weight; preferably 3 to 9 parts by weight; more preferably 5 to 7 parts by weight. This can improve the storage stability of the modified emulsified asphalt.
The preparation steps of the emulsified asphalt comprise the following steps:
(a) uniformly stirring the molten matrix asphalt and the solvent to form a first mixture;
(b) uniformly stirring the first mixture and an emulsifier to form a second mixture;
(c) and uniformly stirring the second mixture and water to obtain the emulsified asphalt.
The selection of the base bitumen, solvent, water and emulsifier and the amounts thereof are as described hereinbefore. The stirring may be performed in a blender.
The matrix pitch in the molten state can be obtained by heating. According to one embodiment of the invention, the matrix asphalt and the solvent are uniformly stirred at 70-120 ℃ to form a first mixture. Preferably, the temperature of the matrix asphalt is 80-110 ℃; more preferably, the temperature of the matrix asphalt is 80-100 ℃.
In the step (a), the stirring speed can be 300-800 rpm, and the stirring time can be 3-15 min. Preferably, the rotating speed is 400-700 rpm; more preferably, the rotation speed is 500-700 rpm. Preferably, the stirring time is 5-13 min; more preferably, the stirring time is 8-12 min. Therefore, the matrix asphalt and the solvent can be fully and uniformly mixed, and the efficiency can be improved.
In the step (b), the rotation speed of stirring can be 600-1000 rpm, and the stirring time can be 7-25 min. Preferably, the rotating speed is 700-1000 rpm; more preferably, the rotation speed is 700-900 rpm. Preferably, the stirring time is 10-20 min; more preferably, the stirring time is 12-18 min. Thus, the emulsified asphalt can be fully emulsified, and the storage stability of the emulsified asphalt is improved.
In the step (c), the stirring speed is 600-1000 rpm, and the stirring time is 10-25 min. Preferably, the rotating speed is 700-1000 rpm; more preferably, the rotation speed is 700-900 rpm. Preferably, the stirring time is 10-20 min; more preferably, the stirring time is 12-18 min. Thus, the emulsified asphalt can be fully emulsified, and the storage stability of the emulsified asphalt is improved.
< preparation step of modified emulsified asphalt component A >
The emulsified asphalt, the aqueous epoxy resin and the carboxylated styrene-butadiene latex are mixed to obtain a mixture (component A). The dosage of the emulsified asphalt can be 30-65 parts by weight; preferably 40 to 55 parts by weight; more preferably 40 to 50 parts by weight. Thus, the modified emulsified asphalt has higher storage stability.
The waterborne epoxy resin can be waterborne bisphenol A epoxy resin, and is preferably south Asia epoxy resin NPEW-291W 53. The solid content of the water-based epoxy resin can be 30-70 wt%; preferably 40 to 60 wt%. The amount of the water-based epoxy resin can be 25-55 parts by weight; preferably 30 to 50 parts by weight; more preferably 40 to 50 parts by weight.
The solid content of the carboxylic styrene-butadiene latex can be 30-70 wt%; preferably 40 to 60 wt%. The carboxylic styrene-butadiene latex can be the carboxylic styrene-butadiene latex SD7623 produced by Pasteur company; carboxylated styrene-butadiene latex XSBRL-45C, XSBRL-46C, XSBRL-55B, XSBRL-45B, XSBRL-44E, available from Lanzhou chemical industry Co., Ltd; carboxylated styrene-butadiene latex XSBRL-46C, XSBRL-45B, available from Qilu petrochemical company. The amount of the carboxylic styrene-butadiene latex can be 3-9 parts by weight; preferably 5 to 7 parts by weight; more preferably 5 to 6 parts by weight. This contributes to the improvement of the storage stability of the modified emulsified asphalt. The carboxylic styrene-butadiene latex is a copolymer generated by emulsion polymerization of butadiene, styrene and a small amount of carboxylic acid and other auxiliary agents, is an aqueous dispersion, and has high film-forming strength and adhesive force, and good storage stability and fluidity. Generally, a carboxylated styrene-butadiene latex is used as the binder. The present invention has surprisingly found that carboxylated styrene-butadiene latex can improve the storage stability of modified emulsified asphalt.
< mixing step of component A and component B >
And (3) mixing the mixture (component A) with a waterborne epoxy resin curing agent (component B) to obtain the modified emulsified asphalt. To avoid reaction of the two, component A and component B are mixed at the time of use. The amount of the above mixture is determined according to the preparation step of the modified emulsified asphalt component A. The waterborne epoxy resin curing agent of the invention can be a modified amine curing agent. Examples of the modified amine-based curing agent include, but are not limited to, FUSONE-01 water-soluble curing agent manufactured by Fusonde electric materials, Inc., Guangzhou. The amount of the water-based epoxy resin curing agent can be 4-10 parts by weight; preferably 6 to 8 parts by weight; more preferably 7 to 8 parts by weight.
The modified emulsified asphalt is prepared by the method. The modified emulsified asphalt has good storage stability, and does not have the phenomenon of sedimentation or agglomeration after being placed for 3 months.
The invention also provides the use of a kerosene emulsifier or a white oil emulsifier for improving the storage stability of an emulsified bitumen. Stirring matrix asphalt, emulsifier (selected from kerosene emulsifier or white oil emulsifier), water and solvent to obtain emulsified asphalt. The types of the base asphalt, water and solvent are as described above. The using amount of the matrix asphalt is 20-60 parts by weight; preferably 30 to 50 parts by weight; more preferably 35 to 45 parts by weight. The dosage of the kerosene emulsifier or the white oil emulsifier can be 3-12 parts by weight; preferably 5 to 10 parts by weight; more preferably 6 to 9 parts by weight. This can improve the storage stability of the emulsified asphalt.
The invention also provides the use of carboxylated styrene-butadiene latex to improve the storage stability of emulsified asphalt. Mixing emulsified asphalt, water-based epoxy resin and carboxylic styrene-butadiene latex to obtain a mixture. The kinds of the aqueous epoxy resin and the carboxylated styrene-butadiene latex are as described above. The dosage of the emulsified asphalt can be 30-65 parts by weight; preferably 40 to 55 parts by weight; more preferably 40 to 50 parts by weight. The amount of the carboxylic styrene-butadiene latex can be 3-9 parts by weight; preferably 5 to 7 parts by weight; more preferably 5 to 6 parts by weight. This can improve the storage stability of the emulsified asphalt.
The following examples are presented using the starting materials:
the matrix asphalt is No. 70 asphalt produced by the Korean SK group;
the emulsifier is B268 kerosene emulsifier produced by Federal Fine chemical engineering Co.Ltd in Guangdong;
the waterborne epoxy resin is south Asia epoxy resin NPEW-291W 53;
the water-based epoxy resin curing agent is FUSONE-01 water-soluble curing agent produced by Guangzhou Fusong electrical material Co.Ltd;
the carboxylated styrene-butadiene latex is produced by BASF corporation as carboxylated styrene-butadiene latex SD 7623.
Preparation example
(1) Uniformly stirring 40 parts by weight of matrix asphalt with the temperature of 90 ℃ and 6 parts by weight of dimethylbenzene under the action of a stirrer to form a first mixture; the rotation speed of the stirrer is 600rpm, and the stirring time is 10 min.
(2) Uniformly stirring the first mixture and 7 parts by weight of emulsifier under the action of a stirrer to form a second mixture; the rotation speed of the stirrer is 800rpm, and the stirring time is 15 min.
(3) Uniformly stirring the second mixture and 47 parts by weight of water under the action of a stirrer to obtain emulsified asphalt; the rotation speed of the stirrer is 800rpm, and the stirring time is 15 min.
Example 1 and comparative examples 1 to 2
(1) The emulsified asphalt of the preparation example, the aqueous epoxy resin and the carboxylated styrene-butadiene latex were mixed to form component a.
(2) A water-based epoxy resin curing agent is used as the component B.
The amounts of the ingredients used are shown in table 1.
Comparative example 3
(1) The emulsified asphalt of the preparation example, the aqueous epoxy resin and the styrene-butadiene latex (the styrene-butadiene latex is prepared by using butadiene and styrene as monomers and by emulsion copolymerization, and is produced by chemical plants of Shanghai high-bridge petrochemical company) are mixed to form the component A.
(2) A water-based epoxy resin curing agent is used as the component B.
The amounts of the ingredients used are shown in table 1.
Comparative example 4
(1) Stirring matrix asphalt at 125 ℃ and preserving heat for 1-2 hours, preparing 6 parts by weight of a mixture of polyvinyl alcohol and nonylphenol polyoxyethylene ether in a mass ratio of 1:1 and 52 parts by weight of water into soap solution, mixing the soap solution and the water by using a colloid mill, and grinding and emulsifying to obtain emulsified asphalt.
(2) And (2) forming the component A by using the emulsified asphalt obtained in the step (1), the water-based epoxy resin and the carboxylic styrene-butadiene latex.
(3) A water-based epoxy resin curing agent is used as the component B.
TABLE 1
| Example 1 | Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 | |
| Emulsified asphalt/part by weight | 43.3 | 70.5 | 22.7 | 43.3 | 43.3 |
| Aqueous epoxy resin/parts by weight | 44.1 | 18.2 | 58.3 | 44.1 | 44.1 |
| Carboxylated styrene-butadiene latex/part by weight | 5.3 | 7.7 | 9.2 | -- | 5.3 |
| Styrene-butadiene latex/part by weight | -- | -- | -- | 5.3 | -- |
| Aqueous epoxy resin curing agent/part by weight | 7.3 | 3.6 | 9.7 | 7.3 | 7.3 |
Examples of the experiments
Test methods for storage stability: the modified emulsified asphalt prepared in examples and comparative examples was left at room temperature for 3 months, and it was observed whether component A had a phenomenon of sedimentation or agglomeration.
The results of the experiment are shown in Table 2.
TABLE 2
The present invention is not limited to the above-described embodiments, and any variations, modifications, and substitutions which may occur to those skilled in the art may be made without departing from the spirit of the invention.
Claims (10)
1. The production method of the modified emulsified asphalt is characterized by comprising the following steps:
(1) stirring 20-60 parts by weight of matrix asphalt, 3-12 parts by weight of an emulsifier selected from a kerosene emulsifier or a white oil emulsifier, 30-60 parts by weight of water and 3-10 parts by weight of a solvent to obtain emulsified asphalt;
(2) mixing 30-65 parts by weight of emulsified asphalt, 25-55 parts by weight of water-based epoxy resin and 3-9 parts by weight of carboxylic styrene-butadiene latex to obtain a mixture;
(3) optionally, mixing the mixture with 4-10 parts by weight of a water-based epoxy resin curing agent to obtain the modified emulsified asphalt.
2. The method for producing modified emulsified asphalt as claimed in claim 1, wherein the emulsified asphalt is used in an amount of 40 to 55 parts by weight, the aqueous epoxy resin is used in an amount of 30 to 50 parts by weight, the aqueous epoxy resin curing agent is used in an amount of 6 to 8 parts by weight, and the carboxylated styrene-butadiene latex is used in an amount of 5 to 7 parts by weight.
3. The process for producing modified emulsified asphalt as claimed in claim 1, wherein the solvent is selected from the group consisting of:
(1) aliphatic alkyl-substituted benzene having C1-C6, or
(2) Esters of C1-C10 aliphatic monohydric alcohols and C1-C6 aliphatic monohydric acids;
the matrix asphalt is heavy traffic asphalt.
4. The method for producing modified emulsified asphalt as claimed in claim 1, wherein the step (1) comprises the steps of:
(a) uniformly stirring the molten matrix asphalt and the solvent to form a first mixture;
(b) uniformly stirring the first mixture and an emulsifier to form a second mixture;
(c) uniformly stirring the second mixture and water to obtain emulsified asphalt;
the stirring speed in the step (a) is 300-800 rpm, and the stirring time is 3-15 min;
the stirring speed in the step (b) is 600-1000 rpm, and the stirring time is 7-25 min;
the stirring speed in the step (c) is 600-1000 rpm, and the stirring time is 10-25 min.
5. The method for producing modified emulsified asphalt as claimed in claim 4, wherein the temperature of the molten base asphalt is 70 to 120 ℃.
6. The method for producing modified emulsified asphalt as claimed in claim 1, wherein the aqueous epoxy resin is aqueous bisphenol a epoxy resin, the aqueous epoxy resin curing agent is a modified amine curing agent, and the emulsifier is a kerosene emulsifier.
7. The method for producing modified emulsified asphalt as claimed in any one of claims 1 to 6, wherein the base asphalt is No. 70 asphalt, the aqueous epoxy resin is south Asia epoxy resin NPEW-291W53, the aqueous epoxy resin curing agent is FUSONE-01 water-soluble curing agent manufactured by Fusones electrical materials, Inc. of Guangzhou, and the carboxylated styrene-butadiene latex is carboxylated styrene-butadiene latex SD7623 manufactured by Pasteur.
8. The modified emulsified asphalt is characterized by being prepared by the production method of any one of claims 1 to 7, and having no sedimentation or agglomeration phenomenon after being placed for 3 months at room temperature.
9. Use of a kerosene emulsifier or a white oil emulsifier for improving the storage stability of an emulsified bitumen.
10. Use of a carboxylated styrene-butadiene latex to improve the storage stability of an emulsified bitumen.
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