CN111334055A - Environment-friendly waste asphalt mixture regenerant with solubilization effect and preparation method thereof - Google Patents
Environment-friendly waste asphalt mixture regenerant with solubilization effect and preparation method thereof Download PDFInfo
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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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L91/00—Compositions of oils, fats or waxes; Compositions of derivatives thereof
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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
- 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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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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 an environment-friendly waste asphalt mixture regenerant with a solubilizing effect and a preparation method thereof, which are prepared from 11-17% of waste rubber powder, 60-70% of oil, 4-8% of solubilizer, 3-5% of polyisobutylene maleic amide, 2.3-3.1% of hindered amine light stabilizer and 6-9.5% of isobutyl triethoxysilane by mass percent.
Description
Technical Field
The invention belongs to the technical field of asphalt pavement materials, and relates to an environment-friendly waste asphalt mixture regenerant with a solubilization effect and a preparation method thereof.
Background
Statistically, about 12% of the asphalt pavements in China need to be overhauled every year, the amount of waste asphalt mixture produced in the process reaches 1900 ten thousand tons, and the number also increases at a rate of 15% per year. The regeneration technology of the waste asphalt mixture is rapidly developed and popularized due to good service performance and obvious economic and environmental benefits. Compared with the new asphalt mixture, the method can reduce 18 kilograms of CO per ton of the regenerated asphalt mixture2The equivalent discharge can also save at least 50% of material cost, which shows that the waste asphalt mixture recycling technology has obvious environmental protection effect and can save huge construction cost. In the research of recycling waste asphalt mixtures, the research and development work of asphalt regenerants is more important. For example, the mixing amount of the waste asphalt mixture recommended in the technical Specification for road asphalt pavement regeneration (JTG F41-2008) in China is 10-30%, but due to the performance limitation of the regenerant, the mixing amount in the entity engineering is only 15-20%. Too low a mixing amount not only causes a large amount of waste asphalt mixture to be accumulated, increases the management cost, and finally mostly degrades for use (such as for road base or low-grade highway) or is abandoned. The quality of the regenerant is a key of the regeneration technology, the existing regenerant has poor thermal stability and permeability, the mixing and dissolving degree of new and old asphalt is not improved enough, the problems of increased stiffness modulus of the mixture, poor low-temperature performance, poor construction workability, difficult compaction and the like are caused, and the application of the asphalt pavement regeneration technology is severely restricted.
Aiming at the problems of the prior art, poor permeability of the regenerant and the like, the environment-friendly waste asphalt mixture regenerant with the solubilization effect needs to be developed urgently, the problems of poor permeability, insufficient stability, high cost and the like of the existing regenerant are solved, and the utilization rate and the service capacity of the waste asphalt mixture are improved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the environment-friendly waste asphalt mixture regenerant with the solubilizing effect and the preparation method thereof.
In order to achieve the purpose, the environment-friendly waste asphalt mixture regenerant with the solubilization effect is prepared from 11-17% of waste rubber powder, 60-70% of oil, 4-8% of solubilizer, 3-5% of polyisobutylene maleic acid amide, 2.3-3.1% of hindered amine light stabilizer and 6-9.5% of isobutyl triethoxysilane by mass percent.
The oil component comprises 60-70% of catalytic cracking slurry oil and 30-40% of waste epoxy soybean oil by mass percent.
The relative density of the catalytic cracking slurry oil is 1.161, and the catalytic cracking slurry oil consists of aromatic components with the mass percentage of 70%, saturated components with the mass percentage of 15%, colloid with the mass percentage of 9% and asphaltene with the mass percentage of 6%; the waste epoxidized soybean oil is obtained by frying for 1h and filtering residues, and the initial epoxy value is more than 8 percent.
55 to 65 percent of sodium dodecyl benzene sulfonate and 35 to 45 percent of polyisobutylene group succinimide by mass percent of solubilizer.
The waste rubber powder is desulfurized waste car tire powder, and the fineness of the waste rubber powder is 40 meshes.
The purity of the polyisobutylene maleic amide, the isobutyl triethoxy silane, the sodium dodecyl benzene sulfonate and the polyisobutylene succinimide is more than 99 percent.
The preparation method of the environment-friendly waste asphalt mixture regenerant with solubilization effect comprises the following steps:
1) carrying out microwave treatment on the waste rubber powder;
2) mixing and stirring the catalytic cracking slurry oil, the waste epoxidized soybean oil, the sodium dodecyl benzene sulfonate and the polyisobutenyl succinimide uniformly to obtain a mixture;
3) heating the mixture obtained in the step 2), then sequentially adding polyisobutylene maleic acid amide, hindered amine light stabilizer and isobutyl triethoxysilane, and stirring;
4) heating the mixture obtained in the step 3) to 120 ℃, then adding the waste rubber powder treated in the step 1), and stirring for 40min at 120 ℃ to obtain the environment-friendly waste asphalt mixture regenerant with solubilization effect.
The specific operation of the step 1) is as follows: performing microwave treatment on the waste rubber powder for 1 hour under the power of 600 w;
the heating temperature in the step 2) is 80 ℃, the stirring time is 20min, and the stirring temperature is 80 ℃;
the heating temperature in the step 3) is 120 ℃, the stirring time is 40min, and the stirring temperature is 120 ℃.
The invention has the following beneficial effects:
the environment-friendly waste asphalt mixture regenerant with solubilization effect and the preparation method thereof are characterized in that during specific operation, catalytic cracking slurry oil and waste epoxidized soybean oil are used as regulators of aged asphalt components to improve the internal chemical composition and structure of the aged asphalt and improve the stability of asphalt colloid, and meanwhile, the waste epoxidized soybean oil can improve the penetrating and dissolving capacity of the regenerant and the compatibility among various substances. In addition, the invention takes sodium dodecyl benzene sulfonate and polyisobutylene succinimide as the solubilizer, and the solubilizer and the heteroatom on the surface of the asphaltene generate acid-base or hydrogen bond action, thereby forming a space stabilizing layer on the surface of the asphaltene particles, increasing the repulsion among the particles, enabling the asphaltene association structure to be disassociated, enabling the asphaltene particles to be well dispersed, effectively promoting the intermiscibility of new and old asphalts, and avoiding the agglomeration and settlement of dispersed phases. Meanwhile, the invention takes the polyisobutylene maleic acid amide as the wax crystal dispersing agent, utilizes the co-crystal formed by the polyisobutylene maleic acid amide and the wax crystal to adsorb the polar light component, and forms a stable solvolysis layer on the surface layer of the wax crystal to reduce the surface free energy of the wax crystal, hinder the mutual connection among the wax crystal particles, reduce the size of the wax crystal, lead the shape of the particles to tend to be regular and increase in quantity, stably exist in the asphalt oil phase, and further improve and stabilize the asphalt colloid structure. In addition, the hindered amine light stabilizer is used for delaying the oxidation reaction of various components of the asphalt, particularly aromatic components and colloid under the action of light and heat, and keeping the relative stability of the asphalt structure and the components; the isobutyl triethoxy silane is utilized to weaken the stronger attraction among asphaltene molecules, promote the condensed asphaltene in the aged asphalt to be uniformly dissolved and dispersed in an asphalt colloid system again, damage the space network structure formed by the agglomeration of the asphaltene, and improve the permeability of the regenerant, thereby improving the regeneration effect. During preparation, all the components are only required to be mixed, heated and stirred, and the preparation method is simple.
Detailed Description
The present invention is described in further detail below with reference to examples:
the environment-friendly waste asphalt mixture regenerant with the solubilization effect is prepared from 11-17% of waste rubber powder, 60-70% of oil, 4-8% of solubilizer, 3-5% of polyisobutylene maleic acid amide, 2.3-3.1% of hindered amine light stabilizer and 6-9.5% of isobutyl triethoxysilane by mass percent.
The oil component comprises 60-70% of catalytic cracking slurry oil and 30-40% of waste epoxy soybean oil by mass percent.
The relative density of the catalytic cracking slurry oil is 1.161, and the catalytic cracking slurry oil consists of aromatic components with the mass percentage of 70%, saturated components with the mass percentage of 15%, colloid with the mass percentage of 9% and asphaltene with the mass percentage of 6%; the waste epoxidized soybean oil is obtained by frying for 1h and filtering residues, and the initial epoxy value is more than 8 percent.
55 to 65 percent of sodium dodecyl benzene sulfonate and 35 to 45 percent of polyisobutylene group succinimide by mass percent of solubilizer.
The waste rubber powder is desulfurized waste car tire powder, and the fineness of the waste rubber powder is 40 meshes.
The purity of the polyisobutylene maleic amide, the isobutyl triethoxy silane, the sodium dodecyl benzene sulfonate and the polyisobutylene succinimide is more than 99 percent.
The preparation method of the environment-friendly waste asphalt mixture regenerant with solubilization effect comprises the following steps:
1) carrying out microwave treatment on the waste rubber powder;
2) mixing and stirring the catalytic cracking slurry oil, the waste epoxidized soybean oil, the sodium dodecyl benzene sulfonate and the polyisobutenyl succinimide uniformly to obtain a mixture;
3) heating the mixture obtained in the step 2), then sequentially adding polyisobutylene maleic acid amide, hindered amine light stabilizer and isobutyl triethoxysilane, and stirring;
4) heating the mixture obtained in the step 3) to 120 ℃, then adding the waste rubber powder treated in the step 1), and stirring for 40min at 120 ℃ to obtain the environment-friendly waste asphalt mixture regenerant with solubilization effect.
The specific operation of the step 1) is as follows: performing microwave treatment on the waste rubber powder for 1 hour under the power of 600 w;
the heating temperature in the step 2) is 80 ℃, the stirring time is 20min, and the stirring temperature is 80 ℃;
the heating temperature in the step 3) is 120 ℃, the stirring time is 40min, and the stirring temperature is 120 ℃.
Example one
The environment-friendly waste asphalt mixture regenerant with the solubilization effect is prepared from 14.7 mass percent of waste rubber powder, 70 mass percent of oil, 4 mass percent of solubilizer, 3 mass percent of polyisobutylene maleic amide, 2.3 mass percent of hindered amine light stabilizer and 6 mass percent of isobutyl triethoxysilane.
The oil component comprises 70 percent of catalytic cracking slurry oil and 30 percent of waste epoxy soybean oil by mass percent.
The relative density of the catalytic cracking slurry oil is 1.161, and the catalytic cracking slurry oil consists of aromatic components with the mass percentage of 70%, saturated components with the mass percentage of 15%, colloid with the mass percentage of 9% and asphaltene with the mass percentage of 6%; the waste epoxidized soybean oil is obtained by frying for 1h and filtering residues, and the initial epoxy value is more than 8 percent.
The mass percent of the solubilizer is composed of 65 percent of sodium dodecyl benzene sulfonate and 35 percent of polyisobutenyl succinimide.
The waste rubber powder is desulfurized waste car tire powder, and the fineness of the waste rubber powder is 40 meshes.
The purity of the polyisobutylene maleic amide, the isobutyl triethoxy silane, the sodium dodecyl benzene sulfonate and the polyisobutylene succinimide is more than 99 percent.
The preparation method of the environment-friendly waste asphalt mixture regenerant with solubilization effect comprises the following steps:
1) carrying out microwave treatment on the waste rubber powder;
2) mixing and stirring the catalytic cracking slurry oil, the waste epoxidized soybean oil, the sodium dodecyl benzene sulfonate and the polyisobutenyl succinimide uniformly to obtain a mixture;
3) heating the mixture obtained in the step 2), then sequentially adding polyisobutylene maleic acid amide, hindered amine light stabilizer and isobutyl triethoxysilane, and stirring;
4) heating the mixture obtained in the step 3) to 120 ℃, then adding the waste rubber powder treated in the step 1), and stirring for 40min at 120 ℃ to obtain the environment-friendly waste asphalt mixture regenerant with solubilization effect.
The specific operation of the step 1) is as follows: performing microwave treatment on the waste rubber powder for 1 hour under the power of 600 w;
the heating temperature in the step 2) is 80 ℃, the stirring time is 20min, and the stirring temperature is 80 ℃;
the heating temperature in the step 3) is 120 ℃, the stirring time is 40min, and the stirring temperature is 120 ℃.
Example two
The environment-friendly waste asphalt mixture regenerant with the solubilization effect is prepared from 17 mass percent of waste rubber powder, 60 mass percent of oil, 8 mass percent of solubilizer, 5 mass percent of polyisobutylene maleic amide, 3.1 mass percent of hindered amine light stabilizer and 6.9 mass percent of isobutyl triethoxysilane.
The oil component comprises 60 percent of catalytic cracking slurry oil and 40 percent of waste epoxy soybean oil in percentage by mass.
The relative density of the catalytic cracking slurry oil is 1.161, and the catalytic cracking slurry oil consists of aromatic components with the mass percentage of 70%, saturated components with the mass percentage of 15%, colloid with the mass percentage of 9% and asphaltene with the mass percentage of 6%; the waste epoxidized soybean oil is obtained by frying for 1h and filtering residues, and the initial epoxy value is more than 8 percent.
The mass percent of the solubilizer is composed of 55 percent of sodium dodecyl benzene sulfonate and 45 percent of polyisobutylene group succinimide.
The waste rubber powder is desulfurized waste car tire powder, and the fineness of the waste rubber powder is 40 meshes.
The purity of the polyisobutylene maleic amide, the isobutyl triethoxy silane, the sodium dodecyl benzene sulfonate and the polyisobutylene succinimide is more than 99 percent.
The preparation method of the environment-friendly waste asphalt mixture regenerant with solubilization effect comprises the following steps:
1) carrying out microwave treatment on the waste rubber powder;
2) mixing and stirring the catalytic cracking slurry oil, the waste epoxidized soybean oil, the sodium dodecyl benzene sulfonate and the polyisobutenyl succinimide uniformly to obtain a mixture;
3) heating the mixture obtained in the step 2), then sequentially adding polyisobutylene maleic acid amide, hindered amine light stabilizer and isobutyl triethoxysilane, and stirring;
4) heating the mixture obtained in the step 3) to 120 ℃, then adding the waste rubber powder treated in the step 1), and stirring for 40min at 120 ℃ to obtain the environment-friendly waste asphalt mixture regenerant with solubilization effect.
The specific operation of the step 1) is as follows: performing microwave treatment on the waste rubber powder for 1 hour under the power of 600 w;
the heating temperature in the step 2) is 80 ℃, the stirring time is 20min, and the stirring temperature is 80 ℃;
the heating temperature in the step 3) is 120 ℃, the stirring time is 40min, and the stirring temperature is 120 ℃.
EXAMPLE III
The environment-friendly waste asphalt mixture regenerant with the solubilization effect is prepared from 14 mass percent of waste rubber powder, 65.4 mass percent of oil, 5.9 mass percent of solubilizer, 4 mass percent of polyisobutylene maleic amide, 2.6 mass percent of hindered amine light stabilizer and 8.1 mass percent of isobutyl triethoxysilane.
The oil component comprises 65 percent of catalytic cracking slurry oil and 35 percent of waste epoxy soybean oil in percentage by mass.
The relative density of the catalytic cracking slurry oil is 1.161, and the catalytic cracking slurry oil consists of aromatic components with the mass percentage of 70%, saturated components with the mass percentage of 15%, colloid with the mass percentage of 9% and asphaltene with the mass percentage of 6%; the waste epoxidized soybean oil is obtained by frying for 1h and filtering residues, and the initial epoxy value is more than 8 percent.
The mass percent of the solubilizer is composed of 60 percent of sodium dodecyl benzene sulfonate and 40 percent of polyisobutenyl succinimide.
The waste rubber powder is desulfurized waste car tire powder, and the fineness of the waste rubber powder is 40 meshes.
The purity of the polyisobutylene maleic amide, the isobutyl triethoxy silane, the sodium dodecyl benzene sulfonate and the polyisobutylene succinimide is more than 99 percent.
The preparation method of the environment-friendly waste asphalt mixture regenerant with solubilization effect comprises the following steps:
1) carrying out microwave treatment on the waste rubber powder;
2) mixing and stirring the catalytic cracking slurry oil, the waste epoxidized soybean oil, the sodium dodecyl benzene sulfonate and the polyisobutenyl succinimide uniformly to obtain a mixture;
3) heating the mixture obtained in the step 2), then sequentially adding polyisobutylene maleic acid amide, hindered amine light stabilizer and isobutyl triethoxysilane, and stirring;
4) heating the mixture obtained in the step 3) to 120 ℃, then adding the waste rubber powder treated in the step 1), and stirring for 40min at 120 ℃ to obtain the environment-friendly waste asphalt mixture regenerant with solubilization effect.
The specific operation of the step 1) is as follows: performing microwave treatment on the waste rubber powder for 1 hour under the power of 600 w;
the heating temperature in the step 2) is 80 ℃, the stirring time is 20min, and the stirring temperature is 80 ℃;
the heating temperature in the step 3) is 120 ℃, the stirring time is 40min, and the stirring temperature is 120 ℃.
Example four
The environment-friendly waste asphalt mixture regenerant with the solubilization effect is prepared from 14 mass percent of waste rubber powder, 64 mass percent of oil, 6.2 mass percent of solubilizer, 4.4 mass percent of polyisobutylene maleic amide, 2.9 mass percent of hindered amine light stabilizer and 9.5 mass percent of isobutyl triethoxysilane.
The oil component comprises 70 percent of catalytic cracking slurry oil and 30 percent of waste epoxy soybean oil by mass percent.
The relative density of the catalytic cracking slurry oil is 1.161, and the catalytic cracking slurry oil consists of aromatic components with the mass percentage of 70%, saturated components with the mass percentage of 15%, colloid with the mass percentage of 9% and asphaltene with the mass percentage of 6%; the waste epoxidized soybean oil is obtained by frying for 1h and filtering residues, and the initial epoxy value is more than 8 percent.
The mass percent of the solubilizer is composed of 55 percent of sodium dodecyl benzene sulfonate and 45 percent of polyisobutylene group succinimide.
The waste rubber powder is desulfurized waste car tire powder, and the fineness of the waste rubber powder is 40 meshes.
The purity of the polyisobutylene maleic amide, the isobutyl triethoxy silane, the sodium dodecyl benzene sulfonate and the polyisobutylene succinimide is more than 99 percent.
The preparation method of the environment-friendly waste asphalt mixture regenerant with solubilization effect comprises the following steps:
1) carrying out microwave treatment on the waste rubber powder;
2) mixing and stirring the catalytic cracking slurry oil, the waste epoxidized soybean oil, the sodium dodecyl benzene sulfonate and the polyisobutenyl succinimide uniformly to obtain a mixture;
3) heating the mixture obtained in the step 2), then sequentially adding polyisobutylene maleic acid amide, hindered amine light stabilizer and isobutyl triethoxysilane, and stirring;
4) heating the mixture obtained in the step 3) to 120 ℃, then adding the waste rubber powder treated in the step 1), and stirring for 40min at 120 ℃ to obtain the environment-friendly waste asphalt mixture regenerant with solubilization effect.
The specific operation of the step 1) is as follows: performing microwave treatment on the waste rubber powder for 1 hour under the power of 600 w;
the heating temperature in the step 2) is 80 ℃, the stirring time is 20min, and the stirring temperature is 80 ℃;
the heating temperature in the step 3) is 120 ℃, the stirring time is 40min, and the stirring temperature is 120 ℃.
EXAMPLE five
The environment-friendly waste asphalt mixture regenerant with the solubilization effect is prepared from 11 mass percent of waste rubber powder, 63.4 mass percent of oil, 8 mass percent of solubilizer, 5 mass percent of polyisobutylene maleic amide, 3.1 mass percent of hindered amine light stabilizer and 9.5 mass percent of isobutyl triethoxysilane.
The oil component comprises 62 percent of catalytic cracking slurry oil and 38 percent of waste epoxy soybean oil in percentage by mass.
The relative density of the catalytic cracking slurry oil is 1.161, and the catalytic cracking slurry oil consists of aromatic components with the mass percentage of 70%, saturated components with the mass percentage of 15%, colloid with the mass percentage of 9% and asphaltene with the mass percentage of 6%; the waste epoxidized soybean oil is obtained by frying for 1h and filtering residues, and the initial epoxy value is more than 8 percent.
The mass percent of the solubilizer is composed of 58 percent of sodium dodecyl benzene sulfonate and 42 percent of polyisobutenyl succinimide.
The waste rubber powder is desulfurized waste car tire powder, and the fineness of the waste rubber powder is 40 meshes.
The purity of the polyisobutylene maleic amide, the isobutyl triethoxy silane, the sodium dodecyl benzene sulfonate and the polyisobutylene succinimide is more than 99 percent.
The preparation method of the environment-friendly waste asphalt mixture regenerant with solubilization effect comprises the following steps:
1) carrying out microwave treatment on the waste rubber powder;
2) mixing and stirring the catalytic cracking slurry oil, the waste epoxidized soybean oil, the sodium dodecyl benzene sulfonate and the polyisobutenyl succinimide uniformly to obtain a mixture;
3) heating the mixture obtained in the step 2), then sequentially adding polyisobutylene maleic acid amide, hindered amine light stabilizer and isobutyl triethoxysilane, and stirring;
4) heating the mixture obtained in the step 3) to 120 ℃, then adding the waste rubber powder treated in the step 1), and stirring for 40min at 120 ℃ to obtain the environment-friendly waste asphalt mixture regenerant with solubilization effect.
The specific operation of the step 1) is as follows: performing microwave treatment on the waste rubber powder for 1 hour under the power of 600 w;
the heating temperature in the step 2) is 80 ℃, the stirring time is 20min, and the stirring temperature is 80 ℃;
the heating temperature in the step 3) is 120 ℃, the stirring time is 40min, and the stirring temperature is 120 ℃.
EXAMPLE six
The environment-friendly waste asphalt mixture regenerant with the solubilization effect is prepared from 12 mass percent of waste rubber powder, 62.4 mass percent of oil, 8 mass percent of solubilizer, 5 mass percent of polyisobutylene maleic amide, 3.1 mass percent of hindered amine light stabilizer and 9.5 mass percent of isobutyl triethoxysilane. The oil component comprises 70 percent of catalytic cracking slurry oil and 30 percent of waste epoxy soybean oil by mass percent.
The relative density of the catalytic cracking slurry oil is 1.161, and the catalytic cracking slurry oil consists of aromatic components with the mass percentage of 70%, saturated components with the mass percentage of 15%, colloid with the mass percentage of 9% and asphaltene with the mass percentage of 6%; the waste epoxidized soybean oil is obtained by frying for 1h and filtering residues, and the initial epoxy value is more than 8 percent.
The mass percent of the solubilizer is composed of 65 percent of sodium dodecyl benzene sulfonate and 35 percent of polyisobutenyl succinimide.
The waste rubber powder is desulfurized waste car tire powder, and the fineness of the waste rubber powder is 40 meshes.
The purity of the polyisobutylene maleic amide, the isobutyl triethoxy silane, the sodium dodecyl benzene sulfonate and the polyisobutylene succinimide is more than 99 percent.
The preparation method of the environment-friendly waste asphalt mixture regenerant with solubilization effect comprises the following steps:
1) carrying out microwave treatment on the waste rubber powder;
2) mixing and stirring the catalytic cracking slurry oil, the waste epoxidized soybean oil, the sodium dodecyl benzene sulfonate and the polyisobutenyl succinimide uniformly to obtain a mixture;
3) heating the mixture obtained in the step 2), then sequentially adding polyisobutylene maleic acid amide, hindered amine light stabilizer and isobutyl triethoxysilane, and stirring;
4) heating the mixture obtained in the step 3) to 120 ℃, then adding the waste rubber powder treated in the step 1), and stirring for 40min at 120 ℃ to obtain the environment-friendly waste asphalt mixture regenerant with solubilization effect.
The specific operation of the step 1) is as follows: performing microwave treatment on the waste rubber powder for 1 hour under the power of 600 w;
the heating temperature in the step 2) is 80 ℃, the stirring time is 20min, and the stirring temperature is 80 ℃;
the heating temperature in the step 3) is 120 ℃, the stirring time is 40min, and the stirring temperature is 120 ℃.
Comparative example 1
This comparative example is aged bitumen without addition of a rejuvenating agent
Comparative example No. two
Comparative 2 is a commercial regenerant
The samples of examples one to four and the sample of comparative example were subjected to performance tests as follows.
The test includes the indexes of penetration, softening point, ductility (low temperature ductility, 5 ℃), 5 ℃ elastic recovery and penetration after mixing and dissolving for 3h, and the like, and is specifically referred to JTJ 052-2000 testing procedure for road engineering asphalt and asphalt mixture. The aged asphalt is extracted under the same standard section and the same condition, and the mixing amount of the regenerant is 6 percent of the mass of the aged asphalt; the aged asphalt penetration samples were immersed in a container containing the rejuvenating agent for 3 hours and then tested for softening point at 25 ℃.
Table 1 shows the penetration test results of the inventive and comparative samples after 3 hours of penetration, softening point, low temperature ductility, elastic recovery at 5 ℃ and miscibility. The first comparative example is a control group, and as can be seen from table 1, the second comparative example recovers the performance of the aged asphalt to a certain degree, and can play a role in softening the asphalt due to the fact that the main component of the second comparative example is aromatic oil, and after the asphalt is aged by a film oven and subjected to ultraviolet aging for 10 days, all indexes are obviously changed, wherein the low-temperature ductility is suddenly reduced, the asphalt is seriously aged and hardened, the low-temperature ductility is obviously reduced, and the use requirements of asphalt pavements are obviously not met; the indexes before and after aging of the second comparative example (SBS modified asphalt) are more stable than those of the first comparative example, the penetration degree is increased greatly, but the loss of the softening point is more, and the penetration degree is not obviously recovered after mixing and dissolving, namely the penetration effect is weaker. Compared with the first comparative example and the second comparative example, the invention has more ideal penetration, ductility and elastic recovery test results and has no adverse effect on the softening point; the penetration degree after 3 hours of mixing and dissolving can reach 95 percent or more of that of the directly and uniformly mixed asphalt, the penetration effect is very obvious, namely, the regenerant has good solubilization effect, the improvement on the high and low temperature performance of the aged asphalt is better than that of the regenerant sold on the market, the pavement performance of the regenerated waste asphalt mixture is effectively improved, the regenerant is environment-friendly and low in cost, has obvious technical advantages, and can provide a new growth point for the regeneration and the utilization of the waste asphalt mixture.
TABLE 1
While the invention has been described in further detail with reference to specific preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. The environment-friendly waste asphalt mixture regenerant with the solubilizing effect is characterized by being prepared from 11-17% of waste rubber powder, 60-70% of oil component, 4-8% of solubilizer, 3-5% of polyisobutylene maleic acid amide, 2.3-3.1% of hindered amine light stabilizer and 6-9.5% of isobutyl triethoxysilane by mass percent.
2. The environment-friendly waste asphalt mixture regenerant with the solubilization effect as claimed in claim 1, wherein the oil component comprises 60-70% of catalytic cracking slurry oil and 30-40% of waste epoxy soybean oil by mass.
3. The environment-friendly waste asphalt mixture regenerant with the solubilization effect as defined in claim 2, wherein the catalytic cracking slurry oil has a relative density of 1.161, and is composed of, by mass, 70% of aromatic components, 15% of saturated components, 9% of colloidal substances and 6% of asphaltenes; the waste epoxidized soybean oil is obtained by frying for 1h and filtering residues, and the initial epoxy value is more than 8 percent.
4. The environment-friendly waste asphalt mixture regenerant with the solubilization effect as defined in claim 2, wherein the mass percent of the solubilizer is 55-65% of sodium dodecyl benzene sulfonate and 35-45% of polyisobutenyl succinimide.
5. The environment-friendly waste asphalt mixture regenerating agent with solubilization effect as defined in claim 1, wherein the waste rubber powder is desulfurized waste car tire powder, and the fineness of the waste rubber powder is 40 mesh.
6. The environment-friendly waste asphalt mixture regenerant with the solubilization effect as defined in claim 4, wherein the purities of polyisobutylene maleic amide, isobutyl triethoxysilane, sodium dodecyl benzene sulfonate and polyisobutylene succinimide are all more than 99%.
7. The preparation method of the environment-friendly waste asphalt mixture regenerant with the solubilization effect as defined in claim 4 is characterized by comprising the following steps of:
1) carrying out microwave treatment on the waste rubber powder;
2) mixing and stirring the catalytic cracking slurry oil, the waste epoxidized soybean oil, the sodium dodecyl benzene sulfonate and the polyisobutenyl succinimide uniformly to obtain a mixture;
3) heating the mixture obtained in the step 2), then sequentially adding polyisobutylene maleic acid amide, hindered amine light stabilizer and isobutyl triethoxysilane, and stirring;
4) heating the mixture obtained in the step 3) to 120 ℃, then adding the waste rubber powder treated in the step 1), and stirring for 40min at 120 ℃ to obtain the environment-friendly waste asphalt mixture regenerant with solubilization effect.
8. The preparation method of the environment-friendly waste asphalt mixture regenerant with the solubilization effect as claimed in claim 1, wherein the specific operation of the step 1) is as follows: performing microwave treatment on the waste rubber powder for 1 hour under the power of 600 w;
the heating temperature in the step 2) is 80 ℃, the stirring time is 20min, and the stirring temperature is 80 ℃;
the heating temperature in the step 3) is 120 ℃, the stirring time is 40min, and the stirring temperature is 120 ℃.
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