CN114621594B - Environment-friendly asphalt cold recycling agent and processing method thereof - Google Patents
Environment-friendly asphalt cold recycling agent and processing method thereof Download PDFInfo
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Abstract
The invention relates to an environment-friendly asphalt cold recycling agent and a processing method thereof, and relates to the field of asphalt cold recycling agents, wherein the asphalt cold recycling agent comprises 100 parts of emulsified asphalt and 15-30 parts of aqueous epoxy compound by mass; the waterborne epoxy compound comprises 100 parts of a component A and 15-30 parts of a component B by mass; the component A comprises 100 parts of aqueous epoxy emulsion, 15-30 parts of end-capped aqueous polyurethane, 2-4 parts of associative thickener and 2-4 parts of coupling agent by mass; the component B comprises 100 parts of amine waterborne epoxy curing agent and 15-30 parts of accelerator according to mass powder. The invention has the effect of good stability.
Description
Technical Field
The invention relates to the field of asphalt cold recycling agents, in particular to an environment-friendly asphalt cold recycling agent and a processing method thereof.
Background
With the rapid development of highway construction in China, the number of asphalt pavements needing to be renovated is rapidly increased every year. If a large amount of the excavated and ground asphalt mixture is discarded, the environment is polluted and resources are wasted, and the development of new stones destroys the ecological environment. The cold regeneration technology can not only save energy and resources and make 100% use of the old asphalt mixture, but also prolong the construction season, improve the working conditions of constructors and reduce environmental pollution. However, the quality of the cold recycling mixture can not meet the quality standard of the asphalt pavement surface layer at present, and the cold recycling mixture can only be used for the base layer. If the application range can be enlarged, the method is not limited to the base layer, and the economic benefit is very huge. Therefore, the development of the cold-recycling regeneration mixture meeting the requirements of the surface layer of the pavement is of great significance.
The regenerants commonly used in China are oil soluble and water soluble. The oil-soluble regenerant is mainly used for thermal regeneration. The main component is light oil, tar extract or petroleum resin extract. When used for cold recycling, they have limited dissolution, dispersion and penetration of old asphalt, and contain high aromatic components, are easily volatilized, and cause serious environmental pollution. The water-soluble regenerant does not use an organic solvent, is environment-friendly and nontoxic, and better meets the requirements of environment-friendly materials. Therefore, water-soluble regenerants are a future development trend. At present, most of the water-soluble agents are emulsified asphalt and emulsion to form modified emulsified asphalt, but the asphalt and the emulsion are simply mixed. The latex is in a floating state in the continuous phase of the emulsified asphalt, and can be separated to different degrees in the storage process, the modified emulsified asphalt is difficult to realize a homogeneous system, and the effect of the modified emulsified asphalt is poor.
Disclosure of Invention
The purpose of the invention is: provides an environment-friendly asphalt cold recycling agent which is a homogeneous system and has good stability and a processing method thereof.
In order to achieve the purpose, the technical scheme of the invention provides an environment-friendly asphalt cold recycling agent and a processing method thereof, wherein the asphalt cold recycling agent comprises 100 parts of emulsified asphalt and 15-30 parts of aqueous epoxy compound by mass; the waterborne epoxy compound comprises 100 parts of a component A and 15-30 parts of a component B in parts by mass; the component A comprises 100 parts of aqueous epoxy emulsion, 15-30 parts of end-capped aqueous polyurethane, 2-4 parts of associative thickener and 2-4 parts of coupling agent by mass; the component B comprises 100 parts of amine waterborne epoxy curing agent and 15-30 parts of accelerator according to mass powder.
By adopting the arrangement, the stability of the environment-friendly asphalt cold recycling agent can be effectively improved.
Preferably, the asphalt cold recycling agent comprises 100 parts of emulsified asphalt and 25-30 parts of aqueous epoxy compound by mass; the waterborne epoxy compound comprises 100 parts of a component A and 25-30 parts of a component B in parts by mass.
By adopting the arrangement, the cold regenerant is further in a homogeneous system and has good stability.
Preferably, the component A further comprises 100 parts by mass of an aqueous epoxy emulsion, 30 parts by mass of a blocked aqueous polyurethane, 3 parts by mass of an associative thickener and 3 parts by mass of a coupling agent.
Through adopting above-mentioned setting, further strengthen the interact of organic resin with building stones, pitch, reinforcing result of use.
Preferably, the emulsified asphalt is prepared from the following components: 40-50 parts of heavy cross-linked asphalt, 6-16 parts of liquid sulfur, 2-10 parts of styrene-butadiene latex, 2-5 parts of alkyl propylene diamine, 0.1-2 parts of octadecyl trimethyl ammonium chloride, 0.1-2 parts of polyacrylamide, 1-1.5 parts of potassium chloride, 0.5-3 parts of acid and 35-40 parts of water.
Preferably, the styrene-butadiene latex is cationic emulsion type, and has a solid content of 40-60%, wherein the bound styrene content is 22-25%.
Preferably, the stabilizer is an organic polymer material or an inorganic salt; the organic polymer material is one or more of methylcellulose, polyvinyl alcohol, gelatin, starch, polyacrylamide, sodium carboxymethylcellulose or hydroxypropyl cellulose.
By adopting the arrangement, the high-temperature and low-temperature performances of the asphalt can be improved, the asphalt can be saved, the production cost is reduced, and the high-temperature stability of the asphalt pavement is improved.
Preferably, the aqueous epoxy emulsion is prepared from the following components: epoxy resin, methyl vinyl dimethoxy silane, an initiator, a reactive emulsifier, an acrylate monomer, an epoxy diluent and water.
By adopting the above arrangement, the waterborne epoxy emulsion has good dispersibility, stability, water resistance and flexibility, does not contain organic volatile matters, and is environment-friendly and pollution-free.
Preferably, the method comprises the following steps:
preparing a component A: mixing the aqueous epoxy emulsion, the blocked aqueous polyurethane, the associative thickener and the coupling agent according to a ratio by utilizing shear mixing equipment to obtain a component A;
preparing a component B: uniformly mixing the amine waterborne epoxy curing agent and the accelerator under the stirring action to obtain a component B;
preparing a waterborne epoxy compound: uniformly mixing the component A and the component B according to the corresponding mass ratio to obtain a water-based epoxy compound;
preparing an asphalt cold recycling agent: slowly adding the aqueous epoxy compound into the emulsified asphalt while stirring, and continuously stirring until the mixed solution is uniform to obtain the asphalt cold recycling agent containing the aqueous epoxy compound.
Through the arrangement, the strength and the toughness are considered, the process is simple, the environment is relatively protected, the waste asphalt mixture is prevented from being discarded, the construction cost is reduced, and the brought economic and social benefits are very obvious.
The preparation method of the modified emulsified asphalt comprises the following steps:
adding liquid sulfur and asphalt into a reaction kettle, reacting for 1.5h at 180 ℃, and cooling to 150 ℃;
weighing cationic emulsifier alkyl propylene diamine and octadecyl trimethyl ammonium chloride, adding into water, adding polyacrylamide and potassium chloride, adding acid while stirring, adjusting pH to 3-5, and making into emulsifier water solution and keeping at 50 deg.C;
preferably, under the action of an emulsifying machine, adding the sulfur asphalt with the temperature of 140 ℃ into the emulsion uniformly, emulsifying for 3min to obtain asphalt emulsion, adding the cationic styrene-butadiene latex after the temperature of the emulsion is lower than 60 ℃, and stirring uniformly to obtain the modified emulsified asphalt.
By adopting the method, the softening point of the asphalt can be greatly improved, the high-temperature performance of the asphalt is improved, the low-temperature performance is better, the asphalt can be saved, the production cost is reduced, the strength and the stability of the asphalt pavement can be improved, and the diseases such as stripping and the like of the asphalt pavement under the load action are prevented.
Preferably, the preparation method of the water-based epoxy emulsion comprises the following steps:
mixing epoxy resin, an alkaline catalyst and maleic acid mono-polyethylene glycol monomethyl ether ester, and reacting for 5-8h at 180-220 ℃;
uniformly mixing an initiator, water and a reactive emulsifier, adding epoxy resin, an epoxy diluent, methyl vinyl dimethoxysilane and an acrylate monomer, and reacting for 2-3h at 90-95 ℃.
The aqueous epoxy emulsion prepared by the preparation method has low viscosity, small particle size, good dispersibility, stability, water resistance and flexibility, and no organic volatile matter
In summary, the invention has the following beneficial technical effects:
according to the invention, the end-capped waterborne polyurethane is introduced into the composite material, so that the toughness of the system is improved, the phenomenon that waterborne epoxy resin is easy to embrittle when used is avoided, and the wear resistance of the waterborne epoxy resin is obviously improved; in addition, the blocked waterborne polyurethane is also a crosslinking agent, and under the action of an amine curing agent and an accelerator, the blocked waterborne polyurethane can be gradually unsealed at room temperature and further crosslinked with epoxy resin to form higher strength in a short time.
Drawings
FIG. 1 is a table of cold regenerant performance indicators for examples 1 to 4 of the present invention;
FIG. 2 is a table of performance indicators for cold regenerants in examples 5 to 7 of the present invention.
Detailed Description
The embodiment of the invention discloses an environment-friendly asphalt cold recycling agent and a processing method thereof, and the invention is further described in detail by combining the attached drawings.
Example 1:
in the present embodiment, the asphalt cold recycling agent includes 100 parts by mass of emulsified asphalt and 15 parts by mass of an aqueous epoxy compound; the waterborne epoxy compound comprises 100 parts of a component A and 30 parts of a component B by mass;
the component A comprises 100 parts of aqueous epoxy emulsion, 15 parts of end-capped aqueous polyurethane, 0.5 part of associative thickener and 0.5 part of coupling agent by mass; the component B comprises 100 parts of amine waterborne epoxy curing agent and 10-20 parts of accelerator by mass.
The preparation method of the asphalt cold recycling agent comprises the following steps:
preparing a component A: mixing the waterborne epoxy emulsion, the blocked waterborne polyurethane, the associative thickener and the coupling agent according to a ratio by utilizing shearing and mixing equipment, and shearing at the speed of 1000-1200 r/min for 10-20min to obtain a component A;
preparing a component B: uniformly mixing the amine waterborne epoxy curing agent and the accelerator under the stirring action of 500-600 revolutions per minute to obtain a component B;
preparing an aqueous epoxy compound: uniformly mixing the component A and the component B according to the corresponding mass ratio to obtain a water-based epoxy compound;
preparing an asphalt cold recycling agent: slowly adding the aqueous epoxy compound into the emulsified asphalt while stirring, and continuously stirring at the speed of 100-200 rpm until the mixed solution is uniform to obtain the asphalt cold recycling agent containing the aqueous epoxy compound.
The asphalt cold recycling agent prepared by the invention has both strength and toughness, and the overall pavement performance is excellent; the requirements of the upper layer of the pavement are met, and meanwhile, no organic solvent is used, the process is simple, the construction environment is good, and the method is rarely reported in China; the method also avoids the waste of the waste asphalt mixture, reduces the construction cost and brings remarkable economic and social benefits.
The preparation method of the emulsified asphalt comprises the following steps:
adding liquid sulfur and asphalt into a reaction kettle, reacting for 1-1.5h at 180-185 ℃, and cooling to 130-150 ℃;
adding a cationic emulsifier into water, adding a stabilizer, adding an acid while stirring, adjusting the pH value to 3-5 to prepare an emulsifier aqueous solution, and keeping the temperature at 50-65 ℃;
under the action of an emulsifying machine, uniformly adding the sulfur modified asphalt with the temperature of 130-150 ℃ into the emulsion, emulsifying for 3-5min to obtain asphalt emulsion, adding styrene-butadiene latex after the temperature of the emulsion is lower than 60 ℃, and uniformly stirring to obtain the emulsified asphalt.
The emulsified asphalt obtained by the preparation method can greatly improve the softening point of the asphalt, improve the high-temperature performance of the asphalt, has better low-temperature performance, can save the asphalt, reduce the production cost, improve the strength and the stability of the asphalt pavement, prevent the asphalt pavement from generating track, peeling and other diseases under the load action, and improve the fatigue cracking resistance of the pavement.
The styrene-butadiene latex is cationic emulsion-polymerized, has the solid content of 40-60%, is combined with styrene-butadiene latex with the styrene content of 22-25%, preferably 40%, and has good compatibility with asphalt, better low-temperature resistance and better freezing resistance; the stabilizer is an organic high molecular material or inorganic salt; wherein the organic polymer material is one or more of methylcellulose, polyvinyl alcohol, gelatin, starch, polyacrylamide, sodium carboxymethylcellulose or hydroxypropyl cellulose.
The preparation method of the water-based epoxy emulsion comprises the following steps:
preparing a reactive emulsifier: mixing epoxy resin, an alkaline catalyst and maleic acid mono-polyethylene glycol monomethyl ether ester, and reacting for 5-8h at 180-220 ℃;
preparing a water-based epoxy emulsion: uniformly mixing an initiator, water and a reactive emulsifier, adding epoxy resin, an epoxy diluent, methyl vinyl dimethoxysilane and an acrylate monomer, and reacting for 2-3h at 90-95 ℃.
The waterborne epoxy emulsion prepared by the preparation method has the advantages of low viscosity, small particle size, good dispersibility, stability, water resistance and flexibility, and no organic volatile matter.
The preparation method of the blocked waterborne polyurethane comprises the following steps:
preparing a polyurethane prepolymer PPU: adding the 1, 4-butanediol adipate and isophorone diisocyanate which are dehydrated in vacuum into a dry three-neck flask, uniformly stirring, dropwise adding a catalyst dibutyltin dilaurate, and reacting for 1.5h at 70 ℃; adjusting the temperature to 80 ℃, adding dimethylolpropionic acid, and continuing to react for 2.5h;
preparing the blocked waterborne polyurethane: adding aminoacetic acid and octadecylamine into the prepared polyurethane prepolymer PPU, reacting for 1h at 70 ℃, cooling to 40 ℃, adding triethylamine for neutralization for 30min, cooling to room temperature, slowly adding distilled water under the condition of vigorous stirring, emulsifying at high speed for 30min, standing until surface layer foams are automatically eliminated, and finally distilling under reduced pressure to remove acetone to obtain the end-capped waterborne polyurethane.
The capped waterborne polyurethane prepared by the preparation method is environment-friendly, nontoxic and good in application prospect. Aiming at the defect of water resistance of the existing water-based polyurethane, the water-based polyurethane is improved to a certain extent, and the comprehensive performance of the product is excellent. Structurally, the hydrophilic/hydrophobic ends can fully play respective roles, the use of hydrophilic chain extenders is reduced on the whole, and the hydrophobic effect is improved.
The preparation method of the associative thickener comprises the following steps:
adding PEG6000, AEO3 and ethyl acetate into a flask with a stirring device, uniformly mixing, and dehydrating at 77 ℃ for 2 hours by using an oil-water separator;
the temperature is reduced to 60 ℃, nitrogen is filled, HDI and Desmodur N75BA are added into the solution, and the reaction is carried out for 4.5 hours at 60 ℃.
Adding deionized water, heating to 98 ℃ for azeotropic boiling, removing the organic solvent through an oil-water separator, supplementing lost water, and cooling to room temperature to obtain the associative thickener with the solid content of 40 percent.
The associative thickener prepared by the preparation method has good appearance, is white semitransparent viscous liquid, can be directly applied and has good stability.
The preparation method of the amine waterborne epoxy curing agent comprises the following steps:
adding sodium lignosulfonate and water into a four-neck flask provided with a heating jacket, a stirring device, a condenser pipe and a thermometer, stirring for 5 minutes, adding diethylenetriamine and phenol, stirring uniformly, slowly heating to about 85 ℃ after dropwise addition, dropwise adding formaldehyde into the flask, keeping the temperature for reaction for 5 hours after dropwise addition, and decompressing and pumping out a solvent and unreacted polyamine to obtain lignin-phenol modified polyamine;
diluting the lignin-phenol modified polyamine prepared in the first step with water, uniformly stirring, and slowly dropwise adding benzyl glycidyl ether into the diluted lignin-phenol modified polyamine, wherein the mass ratio of the benzyl glycidyl ether to primary amine in the lignin-phenol modified polyamine is 0.8:1 (mol: mol), and reacting at 60 ℃ for 3h.
The preparation process is simple, the reaction conditions are mild, the preparation reaction temperature is low, the reaction is carried out at 60-90 ℃, the energy is saved, and the consumption of resources is reduced.
Example 2:
in the present embodiment, the asphalt cold recycling agent comprises 100 parts by mass of emulsified asphalt and 20 parts by mass of an aqueous epoxy compound; the waterborne epoxy compound comprises 100 parts of a component A and 25 parts of a component B in parts by mass;
the component A comprises 100 parts of aqueous epoxy emulsion, 10-25 parts of end-capped aqueous polyurethane, 0.5-2 parts of associative thickener and 0.5-2 parts of coupling agent by mass; the component B comprises 100 parts of amine waterborne epoxy curing agent and 10-20 parts of accelerator by mass.
The preparation method of the emulsified asphalt, the aqueous epoxy emulsion, the blocked aqueous polyurethane, the associative thickener, the coupling agent, the amine aqueous epoxy curing agent and the accelerator has the same steps as those of the example 1.
Example 3:
in the present embodiment, the asphalt cold recycling agent includes 100 parts by mass of emulsified asphalt and 25 parts by mass of an aqueous epoxy compound; the waterborne epoxy compound comprises 100 parts of a component A and 20 parts of a component B by mass;
the component A comprises 100 parts of aqueous epoxy emulsion, 10-25 parts of end-capped aqueous polyurethane, 0.5-2 parts of associative thickener and 0.5-2 parts of coupling agent by mass; the component B comprises 100 parts of amine waterborne epoxy curing agent and 10-20 parts of accelerator according to mass powder.
The preparation method of the emulsified asphalt, the aqueous epoxy emulsion, the blocked aqueous polyurethane, the associative thickener, the coupling agent, the amine aqueous epoxy curing agent and the accelerator has the same steps as those of the example 1.
Example 4:
in the present embodiment, the asphalt cold recycling agent includes 100 parts by mass of emulsified asphalt and 30 parts by mass of an aqueous epoxy compound; the waterborne epoxy compound comprises 100 parts of a component A and 15 parts of a component B in parts by mass;
the component A comprises 100 parts of aqueous epoxy emulsion, 10-25 parts of end-capped aqueous polyurethane, 0.5-2 parts of associative thickener and 0.5-2 parts of coupling agent by mass; the component B comprises 100 parts of amine waterborne epoxy curing agent and 10-20 parts of accelerator according to mass powder.
The preparation method of the emulsified asphalt, the aqueous epoxy emulsion, the blocked aqueous polyurethane, the associative thickener, the coupling agent, the amine aqueous epoxy curing agent and the accelerator is the same as that in the example 1.
Example 5:
in the present example, the asphalt cold recycling agent comprises 100 parts of emulsified asphalt and 17 parts of aqueous epoxy compound by mass; the waterborne epoxy compound comprises 100 parts of a component A and 22 parts of a component B by mass;
the component A comprises 100 parts of aqueous epoxy emulsion, 26 parts of end-capped aqueous polyurethane, 1.7 parts of associative thickener and 1.5 parts of coupling agent by mass; and the component B comprises 100 parts of amine waterborne epoxy curing agent and 18 parts of accelerator according to mass powder.
The preparation method of the emulsified asphalt, the aqueous epoxy emulsion, the blocked aqueous polyurethane, the associative thickener, the coupling agent, the amine aqueous epoxy curing agent and the accelerator has the same steps as those of the example 1.
Example 6:
in the present example, the asphalt cold recycling agent comprises 100 parts of emulsified asphalt and 18 parts of aqueous epoxy compound by mass; the waterborne epoxy compound comprises 100 parts of a component A and 15 parts of a component B in parts by mass;
the component A comprises 100 parts of aqueous epoxy emulsion, 20 parts of end-capped aqueous polyurethane, 1.3 parts of associative thickener and 1.9 parts of coupling agent by mass; and the component B comprises 100 parts of amine waterborne epoxy curing agent and 19 parts of accelerator according to mass powder.
The preparation method of the emulsified asphalt, the aqueous epoxy emulsion, the blocked aqueous polyurethane, the associative thickener, the coupling agent, the amine aqueous epoxy curing agent and the accelerator is the same as that in the example 1.
Example 7:
in the present example, the asphalt cold recycling agent includes 100 parts by mass of emulsified asphalt and 23 parts by mass of an aqueous epoxy compound; the waterborne epoxy compound comprises 100 parts of a component A and 21 parts of a component B in parts by mass;
the component A comprises 100 parts of aqueous epoxy emulsion, 25 parts of end-capped aqueous polyurethane, 1.6 parts of associative thickener and 1.8 parts of coupling agent by mass; the component B comprises 100 parts of amine waterborne epoxy curing agent and 21 parts of accelerator according to mass powder.
The preparation method of the emulsified asphalt, the aqueous epoxy emulsion, the blocked aqueous polyurethane, the associative thickener, the coupling agent, the amine aqueous epoxy curing agent and the accelerator has the same steps as those of the example 1.
The above are all preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the technical features and principles of the present application shall be covered by the protection scope of the present invention.
Claims (4)
1. An environment-friendly asphalt cold recycling agent is characterized in that: the asphalt cold recycling agent comprises 100 parts of emulsified asphalt and 25-30 parts of waterborne epoxy compound by mass;
the waterborne epoxy compound comprises 100 parts of a component A and 25-30 parts of a component B in parts by mass;
the component A comprises 100 parts of aqueous epoxy emulsion, 15-30 parts of end-capped aqueous polyurethane, 2-4 parts of associative thickener and 2-4 parts of coupling agent by mass;
the component B comprises 100 parts of amine waterborne epoxy curing agent and 15-30 parts of accelerator by mass;
the emulsified asphalt is prepared from the following components: 40-50 parts of heavy cross-linked asphalt, 6-16 parts of liquid sulfur, 2-10 parts of styrene-butadiene latex, 2-5 parts of alkyl propylene diamine, 0.1-2 parts of octadecyl trimethyl ammonium chloride, 0.1-2 parts of polyacrylamide, 1-1.5 parts of potassium chloride, 0.5-3 parts of acid and 35-40 parts of water;
the styrene-butadiene latex is cationic emulsion type, the solid content is 40-60%, and the content of the bonded styrene is 22-25%.
2. The environment-friendly asphalt cold recycling agent as claimed in claim 1, wherein: the component A comprises 100 parts of aqueous epoxy emulsion, 30 parts of end-capped aqueous polyurethane, 3 parts of associative thickener and 3 parts of coupling agent by mass.
3. The environment-friendly asphalt cold recycling agent as claimed in claim 1, wherein: the waterborne epoxy emulsion is prepared from the following components: epoxy resin, methyl vinyl dimethoxy silane, an initiator, a reactive emulsifier, an acrylate monomer, an epoxy diluent and water.
4. The processing method of the environment-friendly asphalt cold recycling agent as claimed in any one of claims 1 to 3, wherein: the method comprises the following steps:
preparing a component A: mixing the aqueous epoxy emulsion, the end-capped aqueous polyurethane, the associative thickener and the coupling agent according to a ratio by using shear mixing equipment to obtain a component A;
preparing a component B: uniformly mixing the amine waterborne epoxy curing agent and the accelerator under the stirring action to obtain a component B;
preparing an aqueous epoxy compound: uniformly mixing the component A and the component B according to the corresponding mass ratio to obtain a water-based epoxy compound;
preparing an asphalt cold recycling agent: slowly adding the aqueous epoxy compound into emulsified asphalt while stirring in a container, and continuously stirring until the mixed solution is uniform to obtain the asphalt cold recycling agent containing the aqueous epoxy compound;
the preparation method of the modified emulsified asphalt comprises the following steps:
adding liquid sulfur and asphalt into a reaction kettle, reacting for 1.5h at 180 ℃, and cooling to 150 ℃;
weighing cationic emulsifier alkyl propylene diamine and octadecyl trimethyl ammonium chloride, adding into water, adding polyacrylamide and potassium chloride, adding acid while stirring, adjusting pH to 3-5, and making into emulsifier water solution and keeping at 50 deg.C;
under the action of an emulsifying machine, uniformly adding sulfur asphalt with the temperature of 140 ℃ into the emulsion, emulsifying for 3min to obtain asphalt emulsion, adding cationic styrene-butadiene latex after the temperature of the emulsion is lower than 60 ℃, and uniformly stirring to obtain modified emulsified asphalt;
the preparation method of the water-based epoxy emulsion comprises the following steps:
mixing epoxy resin, an alkaline catalyst and maleic acid mono-polyethylene glycol monomethyl ether ester, and reacting for 5-8h at 180-220 ℃;
uniformly mixing an initiator, water and a reactive emulsifier, adding epoxy resin, an epoxy diluent, methyl vinyl dimethoxysilane and an acrylate monomer, and reacting for 2-3h at 90-95 ℃.
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| CN115504727B (en) * | 2022-09-30 | 2023-09-05 | 广州市市政工程维修处有限公司 | In-situ cold regenerated asphalt mixture and preparation method and application thereof |
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| CN104497603B (en) * | 2015-01-06 | 2017-02-22 | 山西省交通科学研究院 | Water-borne epoxy composite-containing emulsified asphalt cold-recycling agent and preparation method thereof |
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