CN112094505B - SBS modified asphalt regenerant and preparation method thereof - Google Patents
SBS modified asphalt regenerant and preparation method thereof Download PDFInfo
- Publication number
- CN112094505B CN112094505B CN202011213554.1A CN202011213554A CN112094505B CN 112094505 B CN112094505 B CN 112094505B CN 202011213554 A CN202011213554 A CN 202011213554A CN 112094505 B CN112094505 B CN 112094505B
- Authority
- CN
- China
- Prior art keywords
- parts
- montmorillonite
- solution
- sbs
- modified
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2555/00—Characteristics of bituminous mixtures
- C08L2555/30—Environmental or health characteristics, e.g. energy consumption, recycling or safety issues
- C08L2555/34—Recycled or waste materials, e.g. reclaimed bitumen, asphalt, roads or pathways, recycled roof coverings or shingles, recycled aggregate, recycled tires, crumb rubber, glass or cullet, fly or fuel ash, or slag
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2555/00—Characteristics of bituminous mixtures
- C08L2555/40—Mixtures based upon bitumen or asphalt containing functional additives
- C08L2555/50—Inorganic non-macromolecular ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2555/00—Characteristics of bituminous mixtures
- C08L2555/40—Mixtures based upon bitumen or asphalt containing functional additives
- C08L2555/80—Macromolecular constituents
- C08L2555/84—Polymers comprising styrene, e.g., polystyrene, styrene-diene copolymers or styrene-butadiene-styrene copolymers
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses an SBS modified asphalt regenerant and a preparation method thereof, wherein the SBS modified asphalt regenerant comprises the following raw materials in parts by weight: 60-80 parts of extract oil, 10-20 parts of waste lubricating oil, 15-25 parts of petroleum resin, 2-10 parts of solution polymerized styrene butadiene rubber, 3-10 parts of SBS, 5-10 parts of plasticizer, 1-15 parts of dissolution promoter, 0.5-3 parts of dispersant and 1-5 parts of modified montmorillonite; wherein, the modified montmorillonite is prepared by the following method: mixing the nano montmorillonite with the aqueous solution uniformly, processing at the low temperature of minus 30 to minus 10 ℃, and then carrying out intercalation treatment by adopting an intercalation agent to obtain the modified montmorillonite. The invention can recover the high-temperature performance and the low-temperature performance of the old asphalt at the same time, and the cost of the regenerant is low.
Description
Technical Field
The invention relates to the technical field of asphalt regeneration, in particular to an SBS modified asphalt regenerant and a preparation method thereof.
Background
The regeneration of asphalt is the reverse process of aging, and the aged asphalt can be regenerated by adding a regenerant, such as corn oil, aromatic oil, etc. After the regenerant is doped, the relative content of the asphaltene is reduced, the dissolving capacity of the soft asphaltene to the asphaltene is improved, the compatibility of the asphalt is improved, and the penetration degree and ductility of the asphalt are improved, so that the asphalt can recover or approach the original performance.
In the prior art, many researches on asphalt regeneration are carried out, for example, a low-temperature regenerated asphalt binder with the patent number of CN201510689827.2 and application thereof adopt petroleum asphalt, aromatic oil, thermoplastic elastomer and surfactant to achieve the advantages of performance, construction workability and regeneration cost, but mainly aim at the regeneration of base asphalt, and the use condition of the regenerant is limited to a certain extent along with the application of more and more high-grade pavement SBS modified asphalt. For another example, a reactive waste SBS modified asphalt regenerant with the patent number of CN201410828996.5 and a preparation method thereof adopt a component regulator, a structure repairing agent, a plasticizer and a viscosity reducer to improve the high-low temperature and fatigue performance of waste SBS modified asphalt. By adopting the reaction of the structure repairing agent and the aged asphalt, the scheme can cause other side reactions to cause low reaction efficiency and increase use cost, and simultaneously, due to the aging complexity of the modified asphalt, whether the structure repairing agent reacts or not also has a certain problem.
Disclosure of Invention
The invention aims to solve the technical problem of providing the SBS modified asphalt regenerant which can effectively recover the high and low temperature performance of the SBS modified asphalt.
The technical problem to be solved by the invention is to provide a preparation method of the SBS modified asphalt recycling agent.
In order to solve the technical problems, the invention provides an SBS modified asphalt recycling agent, which comprises the following raw materials in parts by weight:
60-80 parts of extract oil, 10-20 parts of waste lubricating oil, 15-25 parts of petroleum resin, 2-10 parts of solution polymerized styrene butadiene rubber, 3-10 parts of SBS, 5-10 parts of plasticizer, 1-15 parts of dissolution promoter, 0.5-3 parts of dispersant and 1-5 parts of modified montmorillonite;
wherein the modified montmorillonite is prepared by the following method: mixing the nano montmorillonite with the aqueous solution uniformly, processing at the low temperature of minus 30 to minus 10 ℃, and then carrying out intercalation treatment by adopting an intercalation agent to obtain the modified montmorillonite.
As an improvement of the technical scheme, the modified montmorillonite is prepared by the following method:
(1) mixing the nano montmorillonite with an acid solution, and refrigerating at the temperature of minus 25 to minus 15 ℃ for 5 to 8 hours to obtain a mixed solution;
(2) boiling and drying the mixed solution to obtain a montmorillonite intermediate product;
(3) and (3) uniformly mixing the montmorillonite intermediate product with the intercalation agent solution, reacting for 0.5-1 h, and drying to obtain the modified montmorillonite.
As an improvement of the technical scheme, the acid solution is one or more of a sulfuric acid solution, a hydrochloric acid solution and a phosphoric acid solution;
the intercalation agent is one or more of dodecyl dimethyl benzyl ammonium bromide, dodecyl dimethyl ammonium chloride and dodecyl dimethyl ammonium bromide.
As an improvement of the technical scheme, the acid solution is a sulfuric acid solution, and the mass fraction of the sulfuric acid solution is 10-15%; the mass ratio of the nano montmorillonite to the acid solution is 1: (8-10);
the intercalation agent is dodecyl dimethyl benzyl ammonium bromide, and the mass fraction of the intercalation agent solution is 2-5%; the mass ratio of the montmorillonite intermediate product to the intercalation agent solution is 1: (3-5).
As an improvement of the technical scheme, the plasticizer is one or more of naphthenic oil, dioctyl maleate, dioctyl phthalate, butyl benzyl phthalate and diisooctyl phthalate;
the dispersant is one or more selected from polypropylene wax, polyacrylate and polymethacrylate.
As an improvement of the technical scheme, the cosolvent selects a silane coupling agent and/or a zwitterionic surfactant;
the amphoteric surfactant is amino acid type amphoteric surfactant or betaine type amphoteric surfactant.
As an improvement of the technical scheme, the cosolvent is a silane coupling agent and a betaine amphoteric surfactant, and the mass ratio of the silane coupling agent to the betaine amphoteric surfactant is (1-5): (2-5);
the betaine amphoteric surfactant is dodecyl dihydroxyethyl betaine.
As an improvement of the above technical solution, the method further comprises:
2-10 parts of nano titanium dioxide and 1-5 parts of a stabilizer;
the stabilizer is a mixture of calcium carbonate and barium sulfate, and the weight ratio of the calcium carbonate to the barium sulfate is (1-3): (5-10).
As an improvement of the technical scheme, the material comprises the following raw materials in parts by weight:
60-80 parts of extract oil, 10-20 parts of waste lubricating oil, 15-22 parts of petroleum resin, 2-8 parts of solution polymerized styrene butadiene rubber, 3-10 parts of SBS, 5-8 parts of plasticizer, 4-6 parts of nano titanium dioxide, 1-5 parts of silane coupling agent, 2-5 parts of dodecyl dihydroxy ethyl betaine, 0.5-1.5 parts of dispersing agent, 1.5-2.5 parts of modified montmorillonite and 1-3 parts of stabilizing agent.
Correspondingly, the invention also discloses a preparation method of the SBS modified asphalt regenerant, which comprises the following steps:
(1) preparing modified montmorillonite;
(2) uniformly mixing extract oil, waste lubricating oil, petroleum resin, solution polymerized styrene butadiene rubber, SBS, plasticizer, dissolution promoter and dispersant to obtain solution;
(3) mixing the modified montmorillonite and the dissolving solution, shearing at 120-180 ℃ for 0.5-1 h, and carrying out heat preservation development at 120-180 ℃ for 0.5-1 h after shearing is finished to obtain the SBS modified asphalt regenerant finished product.
The implementation of the invention has the following beneficial effects:
1. the SBS modified asphalt regenerant disclosed by the invention takes the extract oil, the waste lubricating oil, the petroleum resin, the solution polymerized styrene-butadiene rubber and the plasticizer which are good in compatibility as basic components, the components are strong in mutual solubility and strong in compatibility with other components, the high-temperature performance and the low-temperature performance of the regenerated asphalt can be considered, and a good basic configuration is provided for the SBS modified asphalt regenerant.
2. The SBS modified asphalt regenerant is added with modified montmorillonite in the formula; specifically, the water-containing montmorillonite layer is expanded through low-temperature treatment, and then molecular chains are inserted into the montmorillonite layer by using an intercalating agent to strengthen the condensation degree of the modified montmorillonite and other raw materials; the asphalt surface crystals regenerated by the regenerant are uniform, the force dispersion effect after stress is good, the internal and external shielding effects are good, and the mechanical property of the regenerated mixture is improved. Meanwhile, the modified montmorillonite can prevent raw materials from agglomerating, maximally play the promotion effect of heavy components on the performance of the asphalt, and improve the high-temperature stability of the regenerated waste asphalt.
3. The invention selects the silane coupling agent and the betaine type amphoteric surfactant as the dissolution promoter, which can ensure the compatibility between inorganic substances such as modified montmorillonite, nano titanium dioxide and stabilizing agent and organic substances such as pumped oil, ensure the integral stability of the regenerant, provide enough compatibility for the subsequent regeneration of waste asphalt, and is beneficial to the recovery of the performance of the modified regenerated asphalt.
4. The invention selects nano-scale materials such as nano titanium dioxide, modified montmorillonite and the like, has large surface free energy and good dispersion effect, and promotes the dispersion of the nano materials by the dissolution promoter and the dispersant. The regenerant has good compatibility with asphalt, can prevent free radicals generated in asphalt processing and blending from reducing the performance of the asphalt, reduce the regeneration effect loss of the regenerant in the construction process, improve the strength of the regenerated asphalt and increase the stability. Meanwhile, the modified asphalt regenerant has a certain synergistic effect on the SBS modifier and the fragments thereof remained in the aged modified asphalt, and can stimulate the modification effect of SBS to a greater extent.
Drawings
FIG. 1 is a flow chart of the preparation method of the SBS modified asphalt regenerant of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
The invention provides an SBS modified asphalt regenerant which comprises the following raw materials in parts by weight:
60-80 parts of extract oil, 10-20 parts of waste lubricating oil, 15-25 parts of petroleum resin, 2-10 parts of solution polymerized styrene butadiene rubber, 3-10 parts of SBS, 5-10 parts of plasticizer, 1-15 parts of dissolution promoter, 0.5-3 parts of dispersant and 1-5 parts of modified montmorillonite;
wherein the extract oil is oil obtained by removing the solvent from the extract refined by the petroleum fraction solvent. The specific gravity (20 ℃) of the water-soluble polymer is 0.95-1.01 g/cm3The kinematic viscosity (100 ℃) is 25-40 mm2The flash point was 260 ℃ and the pour point was 15 ℃. The amount of the extract oil is 60 to 80 parts, preferably 70 to 80 parts, and exemplified by 72 parts, 74 parts, 75 parts and 78 parts, but not limited thereto.
The amount of the waste lubricating oil is 10-20 parts, preferably 14-20 parts, and exemplarily 15 parts, 16 parts and 18 parts, but is not limited thereto.
The petroleum resin is a thermoplastic resin produced by the processes of pretreatment, polymerization, distillation and the like of C5 and C9 fractions which are byproducts of petroleum cracking. The petroleum resin in the present invention may be selected from, but not limited to, C9 petroleum resin, C5 petroleum resin, AMS petroleum resin. Preferably, the invention selects C9 petroleum resin, which has better compatibility with extract oil, waste lubricating oil and solution polymerized styrene butadiene rubber. Specifically, the molecular weight of the C9 petroleum resin is 3500-5000, the C9 petroleum resin is in the form of light yellow and light brown sheets, the relative density of the C9 petroleum resin is 1.01-1.04, the softening point of the C9 petroleum resin is 80-95 ℃, and the glass transition temperature of the C9 petroleum resin is 85 ℃. The amount of the petroleum resin is 15 to 25 parts, preferably 15 to 22 parts, and exemplary is 16 parts, 17 parts, 20 parts, 21 parts, but not limited thereto.
The solution polymerized butadiene-styrene rubber is a copolymer prepared by adopting organic lithium to initiate putty polymerization in a hydrocarbon solvent for butadiene and styrene. Specifically, in the invention, the content of the combined styrene in the solution-polymerized styrene-butadiene rubber is 33-45%, the glass transition temperature is-40 to-20 ℃, and the Mooney viscosity (100 ℃) is 20-40ML 1+4. The amount of the solution-polymerized styrene-butadiene rubber is 2 to 10 parts, preferably 2 to 8 parts, and exemplarily 3 parts, 5 parts, and 7 parts, but is not limited thereto.
The plasticizer has the main function of further improving the compatibility among the extract oil, the waste lubricating oil, the petroleum resin and the solution polymerized styrene butadiene rubber and providing a good basic configuration for the SBS modified asphalt regenerant. Specifically, the plasticizer may be one or more selected from the group consisting of naphthenic oil, dioctyl maleate, dioctyl phthalate, butyl benzyl phthalate, and diisooctyl phthalate, but is not limited thereto. Preferably, the plasticizer is one of naphthenic oil, dioctyl maleate and dioctyl phthalate. The plasticizer is used in an amount of 5 to 10 parts, preferably 5 to 8 parts, and illustratively 6 parts, 7 parts, or 8 parts, but is not limited thereto.
According to the invention, the extract oil, the waste lubricating oil, the petroleum resin, the solution polymerized styrene-butadiene rubber and the plasticizer with good compatibility are taken as basic components, so that the solubility of the basic components is improved, and a good foundation is provided for the low-temperature performance and the high-temperature performance of the regenerated asphalt.
SBS (styrene thermoplastic elastomer) is a modifier commonly used in the field of asphalt, and can form a spatial three-dimensional network structure in an asphalt matrix space to improve various performances of the asphalt. The invention has no specific requirements for the specific types of SBS, and the skilled in the art can select SBS of corresponding type according to the actual performance requirement. SBS is used in an amount of 3 to 10 parts, illustratively 4 parts, 5 parts, 7 parts, 8 parts, 9 parts, but is not limited thereto.
The dispersing agent is used to assist in the dispersion of the materials to form a uniform system. Specifically, in the present invention, the dispersant may be one or more selected from polypropylene wax, polyacrylate, and polymethacrylate, but is not limited thereto. The dispersant is used in an amount of 0.5 to 3 parts, preferably 0.5 to 1.5 parts, and illustratively 0.5 part, 0.7 part, 0.8 part, 1.0 part, 1.2 parts, 1.3 parts, but not limited thereto.
Furthermore, in order to improve the solubility and the suspension of the inorganic raw materials in the organic base components, the invention also introduces a dissolution promoter into the formula. The concrete dissolution promoter selects silane coupling agent and/or zwitterionic surfactant; wherein the amphoteric surfactant is selected from amino acid type amphoteric surfactant or betaine type amphoteric surfactant. Preferably, the dissolution promoter is selected from a silane coupling agent and a betaine amphoteric surfactant, and the ratio of the silane coupling agent: betaine amphoteric surfactant = (1-5): (2-5); the betaine type amphoteric surfactant is dodecyl dihydroxyethyl betaine. Dodecyl dihydroxyethyl betaine can well act with montmorillonite modifier, and effectively promote the dispersion of modified montmorillonite. Specifically, the amount of the dissolution accelerator is 1-15 parts, preferably 3-10 parts, wherein the amount of the silane coupling agent is 1-5 parts, and the amount of the dodecyl dihydroxy ethyl betaine is 2-5 parts.
In addition, the regenerant also comprises 1-5 parts of a stabilizer, and the stabilizer can improve the ion complexity of the SBS modified asphalt regenerant and further improve the stability of the SBS modified asphalt regenerant. In addition, the modified montmorillonite can also be synergistically acted with other inorganic additives (modified montmorillonite and nano titanium dioxide) to improve the high-temperature performance of the waste asphalt.
Specifically, the stabilizer may be calcium carbonate and/or barium sulfate, but is not limited thereto. Preferably, calcium carbonate and barium sulfate are selected as the stabilizing agent.
The modified montmorillonite is obtained by mixing nano montmorillonite with aqueous solution, treating at low temperature to make montmorillonite layer expand, and then inserting intercalation agent for modification. The modified montmorillonite can strengthen the condensation degree of various raw materials in the waste asphalt, so that the asphalt regenerated by the regenerant has uniform surface crystals, good force dispersion effect after being stressed, good internal and external shielding effect and improved mechanical property of the regenerated mixture. Meanwhile, the modified montmorillonite can prevent raw materials from agglomerating, maximally play the promotion effect of heavy components on the performance of the asphalt, and improve the high-temperature stability of the regenerated waste asphalt.
Specifically, the modified montmorillonite is prepared by the following method:
(1) mixing the nano montmorillonite with an acid solution, and refrigerating at the temperature of minus 25 to minus 15 ℃ for 5 to 8 hours to obtain a mixed solution;
wherein the acid solution is one or more of sulfuric acid solution, hydrochloric acid solution and phosphoric acid solution; preferably, the acid solution is a sulfuric acid solution, and the mass fraction of the sulfuric acid solution is 10-15%; the mass ratio of the nano montmorillonite to the acid solution is 1: (8-10).
Specifically, mixing nano montmorillonite with a dilute sulfuric acid solution, stirring at 60-70 ℃ for 30-50 min, and then cooling to room temperature; and then refrigerating at the temperature of minus 25 to minus 20 ℃ for 5 to 8 hours.
The adsorption performance of the nano montmorillonite can be improved by the treatment of the acid solution; through low-temperature refrigeration, water in the solution can be solidified and expanded in volume, so that the space between montmorillonite layers is enlarged, and good conditions are provided for subsequent intercalation of the intercalating agent.
The aqueous solution in the present invention is not limited to an acid solution, but may be a dilute alkali solution, an aqueous acetone solution, an alcohol, or the like, but is not limited thereto.
(2) Boiling and drying the mixed solution to obtain a montmorillonite intermediate product;
specifically, after refrigeration, the mixed solution is returned to room temperature, then boiled under 3-5 atmospheric pressures, and dried to obtain the montmorillonite intermediate product.
(3) And (3) uniformly mixing the montmorillonite intermediate product with the intercalation agent solution, reacting for 0.5-1 h, and drying to obtain the modified montmorillonite.
Specifically, the intercalation agent is one or more of dodecyl dimethyl benzyl ammonium bromide, dodecyl dimethyl ammonium chloride and dodecyl dimethyl ammonium bromide. Preferably, the intercalation agent is dodecyl dimethyl benzyl ammonium bromide, and the mass fraction of the intercalation agent solution is 2-5%; the mass ratio of the montmorillonite intermediate product to the intercalation agent solution is 1: (3-5).
The amount of the modified montmorillonite is 1 to 5 parts, preferably 1.5 to 2.5 parts, and exemplarily 1.6 parts, 1.7 parts, 2.0 parts, 2.2 parts, and 2.4 parts, but is not limited thereto.
Furthermore, in order to improve the high-temperature performance of the waste asphalt, the regenerant of the invention also introduces nano titanium dioxide which can be cooperated with modified montmorillonite, stabilizer and the like. Specifically, the amount of the nano titanium dioxide is 2-10 parts, preferably 4-6 parts.
Correspondingly, referring to fig. 1, the invention also discloses a preparation method of the SBS modified asphalt regenerant, which specifically comprises the following steps:
s1: preparing modified montmorillonite;
s2: mixing extract oil, waste lubricating oil, petroleum resin, solution polymerized styrene-butadiene rubber, SBS, plasticizer, dissolution promoter and dispersant, shearing at 120-180 ℃ for 0.5-1 h, and performing heat preservation development at 120-180 ℃ for 0.5-1 h after shearing to obtain a solution;
specifically, various raw materials are mixed and sheared for 30-50 min at the rotating speed of 4000-6000 rpm, the temperature is maintained at 150-160 ℃ in the shearing process, and after shearing is completed, heat preservation development is carried out for 40-60 min, so that the dissolving solution is obtained.
Preferably, when the formulation of the present invention contains nano-titania, the nano-titania is mixed with various raw materials at this step.
S3: and uniformly mixing the modified montmorillonite and the dissolving solution to obtain the SBS modified asphalt regenerant finished product.
Preferably, when a stabilizer is included in the formulation of the present invention, the stabilizer is mixed with the various materials at this step.
The invention is illustrated below in specific examples:
example 1
The embodiment provides an SBS modified asphalt regenerant, which comprises the following formula:
80 parts of extract oil, 10 parts of waste lubricating oil, 15 parts of petroleum resin, 3 parts of solution polymerized styrene-butadiene rubber, 5 parts of SBS, 5 parts of naphthenic oil, 3 parts of silane coupling agent, 2 parts of dodecyl dihydroxy ethyl betaine, 0.5 part of polypropylene wax, 2 parts of modified montmorillonite and 1 part of stabilizer; the stabilizer is formed by mixing calcium carbonate and barium sulfate in a mass ratio of 3: 5.
The preparation method comprises the following steps:
(1) preparing modified montmorillonite;
mixing nano montmorillonite and 15% dilute sulfuric acid at a ratio of 1:8, stirring at 60 deg.C for 50min, cooling to room temperature, and refrigerating at-25 deg.C for 5 hr. Taking out the mixture, boiling and drying under 3 standard atmospheric pressures, reacting 3 mass percent of dodecyl dimethyl benzyl ammonium bromide solution with nano montmorillonite at 50 ℃ for 30min according to the mass ratio of 5:1, and drying under reduced pressure to obtain modified montmorillonite;
(2) mixing extract oil, waste lubricating oil, petroleum resin, solution polymerized styrene-butadiene rubber, SBS, naphthenic oil, silane coupling agent, dodecyl dihydroxy ethyl betaine and polypropylene wax, shearing at the rotation speed of 4000rpm and the temperature of 170 ℃ for 50min, and performing heat preservation development for 60min to obtain a solution;
(3) adding the modified montmorillonite, calcium carbonate and barium sulfate into the dissolving solution, and fully and uniformly mixing.
Example 2
The embodiment provides an SBS modified asphalt regenerant, which comprises the following formula:
80 parts of extract oil, 10 parts of waste lubricating oil, 15 parts of petroleum resin, 3 parts of solution polymerized styrene butadiene rubber, 5 parts of SBS, 5 parts of naphthenic oil, 4 parts of nano titanium dioxide, 2 parts of dodecyl dihydroxy ethyl betaine, 0.5 part of polypropylene wax, 2 parts of modified montmorillonite and 1 part of stabilizer; the stabilizer is formed by mixing calcium carbonate and barium sulfate in a mass ratio of 3: 5.
The preparation method comprises the following steps:
(1) preparing modified montmorillonite;
same as example 1;
(2) mixing the extract oil, waste lubricating oil, petroleum resin, solution polymerized styrene-butadiene rubber, SBS, naphthenic oil, nano titanium dioxide, dodecyl dihydroxy ethyl betaine and polypropylene wax, shearing at the rotation speed of 4000rpm and the temperature of 170 ℃ for 50min, and performing heat preservation development for 60min to obtain a solution;
(3) adding the modified montmorillonite, calcium carbonate and barium sulfate into the dissolving solution, and fully and uniformly mixing.
Example 3
The embodiment provides an SBS modified asphalt regenerant, which comprises the following formula:
80 parts of extract oil, 10 parts of waste lubricating oil, 15 parts of petroleum resin, 3 parts of solution polymerized styrene-butadiene rubber, 5 parts of SBS, 5 parts of naphthenic oil, 4 parts of nano titanium dioxide, 3 parts of silane coupling agent, 0.5 part of polypropylene wax, 2 parts of modified montmorillonite and 1 part of stabilizer; the stabilizer is formed by mixing calcium carbonate and barium sulfate in a mass ratio of 3: 5.
The preparation method comprises the following steps:
(1) preparing modified montmorillonite;
same as example 1;
(2) mixing the extract oil, waste lubricating oil, petroleum resin, solution polymerized styrene-butadiene rubber, SBS, naphthenic oil, nano titanium dioxide, silane coupling agent and polypropylene wax, shearing at the rotation speed of 4000rpm and the temperature of 170 ℃ for 50min, and performing heat preservation development for 60min to obtain a solution;
(3) adding the modified montmorillonite, calcium carbonate and barium sulfate into the dissolving solution, and fully and uniformly mixing.
Example 4
The embodiment provides an SBS modified asphalt regenerant, which comprises the following formula:
80 parts of extract oil, 10 parts of waste lubricating oil, 15 parts of petroleum resin, 3 parts of solution polymerized styrene-butadiene rubber, 5 parts of SBS, 5 parts of naphthenic oil, 4 parts of nano titanium dioxide, 3 parts of silane coupling agent, 2 parts of dodecyl dihydroxy ethyl betaine, 0.5 part of polypropylene wax, 2 parts of modified montmorillonite and 1 part of stabilizer; the stabilizer is formed by mixing calcium carbonate and barium sulfate in a mass ratio of 3: 5.
The preparation method comprises the following steps:
(1) preparing modified montmorillonite;
same as example 1;
(2) mixing extract oil, waste lubricating oil, petroleum resin, solution polymerized styrene-butadiene rubber, SBS, naphthenic oil, nano titanium dioxide, silane coupling agent, dodecyl dihydroxy ethyl betaine and polypropylene wax, shearing at the rotation speed of 4000rpm and the temperature of 170 ℃ for 50min, and performing heat preservation development for 60min to obtain a solution;
(3) adding the modified montmorillonite, calcium carbonate and barium sulfate into the dissolving solution, and fully and uniformly mixing.
Example 5
The embodiment provides an SBS modified asphalt regenerant, which comprises the following formula:
60 parts of extract oil, 20 parts of waste lubricating oil, 22 parts of petroleum resin, 5 parts of solution polymerized styrene butadiene rubber, 8 parts of SBS, 5 parts of dioctyl maleate, 4 parts of nano titanium dioxide, 5 parts of silane coupling agent, 2 parts of dodecyl dihydroxy ethyl betaine, 0.5 part of sodium polyacrylate, 0.3 part of polypropylene wax, 1.5 parts of modified montmorillonite and 2 parts of stabilizer; the stabilizer is formed by mixing calcium carbonate and barium sulfate in a mass ratio of 1: 5.
The preparation method comprises the following steps:
(1) preparation of modified montmorillonite
Mixing nanometer montmorillonite 2 and 10% dilute sulfuric acid at a ratio of 1:10, stirring at 70 deg.C for 30min, cooling to room temperature, and refrigerating at-20 deg.C for 8 h. Taking out the mixture, boiling and drying under 5 standard atmospheric pressures, reacting 5 mass percent of dodecyl dimethyl benzyl ammonium bromide solution with nano montmorillonite at the temperature of 60 ℃ for 40min according to the mass ratio of 3:1, and drying under reduced pressure to obtain modified montmorillonite;
(2) mixing extract oil, waste lubricating oil, petroleum resin, solution polymerized styrene-butadiene rubber, SBS, dioctyl maleate, nano titanium dioxide, silane coupling agent, dodecyl dihydroxyethyl betaine, sodium polyacrylate and polypropylene wax, shearing at the rotating speed of 6000rpm and the temperature of 160 ℃ for 30min, and performing heat preservation and development for 40min to obtain a solution;
(3) adding the modified montmorillonite, calcium carbonate and barium sulfate into the dissolving solution, and fully and uniformly mixing.
Example 6
The embodiment provides an SBS modified asphalt regenerant, which comprises the following formula:
75 parts of extract oil, 16 parts of waste lubricating oil, 19 parts of petroleum resin, 5 parts of solution polymerized styrene butadiene rubber, 5 parts of SBS, 6 parts of diisooctyl phthalate, 5 parts of nano titanium dioxide, 2 parts of silane coupling agent, 2 parts of dodecyl dihydroxy ethyl betaine, 0.8 part of sodium polymethacrylate, 1.9 parts of modified montmorillonite and 3 parts of stabilizer; the stabilizer is formed by mixing calcium carbonate and barium sulfate in a mass ratio of 4: 7.
The SBS modified asphalt regenerant comprises the following steps:
(1) preparation of modified montmorillonite
Mixing nano montmorillonite and 13% dilute sulfuric acid at a ratio of 1:9, stirring at 65 deg.C for 40min, cooling to room temperature, and refrigerating at-23 deg.C for 6 h. Taking out the mixture, boiling and drying under 4 standard atmospheric pressures, reacting 4 mass percent of dodecyl dimethyl benzyl ammonium bromide solution with nano montmorillonite at 55 ℃ for 30min according to the mass ratio of 4:1, and drying under reduced pressure to obtain modified montmorillonite;
(2) mixing extract oil, waste lubricating oil, petroleum resin, solution polymerized styrene-butadiene rubber, SBS, diisooctyl phthalate, nano titanium dioxide, silane coupling agent, dodecyl dihydroxyethyl betaine and sodium polymethacrylate, shearing at the rotating speed of 5000rpm and the temperature of 160 ℃ for 30min, and performing heat preservation development for 50min to obtain a solution;
(3) adding the modified montmorillonite, calcium carbonate and barium sulfate into the dissolving solution, and fully and uniformly mixing.
Comparative example 1
This comparative example provides an SBS-modified asphalt recycling agent which differs from example 4 in that SBS is not included.
Comparative example 2
This comparative example provides an SBS modified asphalt recycling agent which differs from example 4 in that it does not contain modified montmorillonite.
The SBS modified asphalt recycling agents prepared in examples 1 to 6 were added to aged SBS modified asphalt in an amount of 10% respectively, and the penetration (25 ℃), softening point, ductility (5 ℃), elastic recovery (25 ℃) and rotational viscosity (135 ℃) thereof were measured. The results are given in the following table:
as can be seen from the table, the penetration, ductility and elastic recovery of the regenerated SBS modified asphalt obtained in examples 1-6 are effectively improved after 10% of the modified asphalt is added, and the rotational viscosity and the softening point are reduced to a certain extent. In conclusion, the SBS modified asphalt regenerant in the embodiment has a good regeneration and recovery effect on aged modified asphalt, and can basically recover to the index requirement of new SBS modified asphalt under the doping amount of 10%.
The SBS modified asphalt recycling agents prepared in comparative examples 1-2 were added to aged SBS modified asphalt in amounts of 8%, 10%, and 12%, respectively, and the penetration (25 ℃), softening point, ductility (5 ℃), elastic recovery (25 ℃) and rotational viscosity (135 ℃) were examined, wherein the rotational viscosity was not more than 3.0 pas and the differences were not listed in the table.
As can be seen from the table, the regenerated SBS modified asphalt prepared in the comparative examples 1-2 has a certain regeneration effect on the aged SBS modified asphalt, but the overall effect is poor and cannot reach the level of the invention. For different doping amounts of the regenerant, the detection result of the 10% doping amount is improved more than that of the 8% doping amount, but the doping amount of the regenerant is increased continuously, and the detection result of the 12% doping amount is close to that of the 10% doping amount. The performance of the regenerated modified asphalt is further recovered along with the increase of the mixing amount of the regenerant, but the performance is not greatly influenced by the increase of the mixing amount of the regenerant after the mixing amount reaches 10 percent. The comparative example was inferior to the examples in terms of the overall regeneration effect, whether the blending amount was 10% or increased to 12%.
The SBS modified asphalt regenerants are prepared according to groups 1-6 and comparative examples 1-2 respectively, and performance tests of modified and regenerated AC-20 asphalt mixtures are performed respectively, wherein the mixing amount of RAP (regenerated asphalt mixture) is 30%, the mixing amount of the SBS modified asphalt regenerant is 10% of the mass of the old asphalt, and the results of the comparative test of the mixture performance are shown in the following table.
As can be seen from the table, except for low temperature strain, each index of each group satisfies the technical requirements, but the improvement degree of each index of the examples is better than that of the comparative examples.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (4)
1. The SBS modified asphalt regenerant is characterized by comprising the following raw materials in parts by weight:
60-80 parts of extract oil, 10-20 parts of waste lubricating oil, 15-22 parts of petroleum resin, 2-8 parts of solution polymerized styrene butadiene rubber, 3-10 parts of SBS, 5-8 parts of plasticizer, 4-6 parts of nano titanium dioxide, 1-5 parts of silane coupling agent, 2-5 parts of dodecyl dihydroxy ethyl betaine, 0.5-1.5 parts of dispersing agent, 1.5-2.5 parts of modified montmorillonite and 1-3 parts of stabilizing agent;
the plasticizer is naphthenic oil;
the dispersing agent is one or more of polypropylene wax, polyacrylate and polymethacrylate;
the stabilizer is a mixture of calcium carbonate and barium sulfate, and the weight ratio of the calcium carbonate to the barium sulfate is (1-3): (5-10);
the modified montmorillonite is prepared by the following method:
(1) mixing the nano montmorillonite with an acid solution, and refrigerating at the temperature of minus 25 to minus 15 ℃ for 5 to 8 hours to obtain a mixture;
(2) boiling and drying the mixture to obtain a montmorillonite intermediate product;
(3) and (3) uniformly mixing the montmorillonite intermediate product with an intercalation agent solution, reacting for 0.5-1 h, and drying to obtain the modified montmorillonite.
2. The SBS modified asphalt regenerant of claim 1, wherein said acid solution is selected from one or more of a sulfuric acid solution, a hydrochloric acid solution, and a phosphoric acid solution;
the intercalation agent is dodecyl dimethyl benzyl ammonium bromide.
3. The SBS modified asphalt regenerant as claimed in claim 2, wherein the acid solution is a sulfuric acid solution with a mass fraction of 10-15%; the mass ratio of the nano montmorillonite to the acid solution is 1: (8-10);
the mass fraction of the intercalation solution is 2-5%; the mass ratio of the montmorillonite intermediate product to the intercalator solution is 1: (3-5).
4. The method for preparing the SBS modified asphalt recycling agent as claimed in any one of claims 1 to 3, wherein the method comprises the following steps:
(1) preparing modified montmorillonite;
(2) mixing extract oil, waste lubricating oil, petroleum resin, solution polymerized styrene-butadiene rubber, SBS, plasticizer, nano titanium dioxide, silane coupling agent, dodecyl dihydroxy ethyl betaine and dispersing agent, shearing at 120-180 ℃ for 0.5-1 h, and performing heat preservation development at 120-180 ℃ for 0.5-1 h after shearing to obtain a solution;
(3) uniformly mixing the modified montmorillonite, the stabilizer and the dissolving solution to obtain a finished product of the SBS modified asphalt regenerant;
wherein the plasticizer is naphthenic oil;
the dispersing agent is one or more of polypropylene wax, polyacrylate and polymethacrylate;
the stabilizer is a mixture of calcium carbonate and barium sulfate, and the weight ratio of the calcium carbonate to the barium sulfate is (1-3): (5-10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011213554.1A CN112094505B (en) | 2020-11-04 | 2020-11-04 | SBS modified asphalt regenerant and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011213554.1A CN112094505B (en) | 2020-11-04 | 2020-11-04 | SBS modified asphalt regenerant and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112094505A CN112094505A (en) | 2020-12-18 |
| CN112094505B true CN112094505B (en) | 2021-06-11 |
Family
ID=73784553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011213554.1A Active CN112094505B (en) | 2020-11-04 | 2020-11-04 | SBS modified asphalt regenerant and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112094505B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111944324A (en) * | 2020-09-08 | 2020-11-17 | 福州大学 | SBR and waste polypropylene composite modified asphalt and preparation method thereof |
| CN113025065B (en) * | 2021-02-01 | 2022-03-11 | 河海大学 | A kind of emulsification regenerant with workability and preparation method thereof |
| CN113214666B (en) * | 2021-05-31 | 2022-07-05 | 大连理工大学 | A kind of functionalized solution-polymerized styrene-butadiene rubber compound C9 petroleum resin modified asphalt and preparation method thereof |
| CN114790337B (en) * | 2022-03-14 | 2023-04-18 | 湖北工业大学 | Asphalt modifier, preparation method thereof and modified low-carbon asphalt |
| CN114853389A (en) * | 2022-04-19 | 2022-08-05 | 遂宁天孜路新材料技术有限公司 | Preparation method of low-temperature recycled asphalt and mixture |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1728831A1 (en) * | 2005-06-03 | 2006-12-06 | Nederlandse Organisatie voor toegepast-natuurwetenschappelijk Onderzoek TNO | Bitumen composition with improved ageing resistance |
| CN101629020A (en) * | 2009-08-10 | 2010-01-20 | 江苏省建筑科学研究院有限公司 | Special regenerant suitable for regenerating modified asphalt and prepared method thereof |
| US20110232529A1 (en) * | 2008-10-02 | 2011-09-29 | Eurovia | Bituminous coating with great acoustic performance |
| CN102618046A (en) * | 2012-03-31 | 2012-08-01 | 英达热再生有限公司 | SBS (styrene-butadiene-styrene) modified regenerant, preparation method thereof and asphalt regeneration method |
| CN103804936A (en) * | 2014-02-20 | 2014-05-21 | 重庆交通大学 | Waste SBS asphalt regenerant and preparation method thereof |
| CN105754356A (en) * | 2016-03-28 | 2016-07-13 | 长沙理工大学 | Asphalt regenerant as well as preparation method and application thereof |
| CN106009724A (en) * | 2016-06-17 | 2016-10-12 | 东南大学 | Modified regenerant and preparation method and application thereof |
| DE102015109086A1 (en) * | 2015-06-09 | 2016-12-15 | Bergische Universität Wuppertal | Adduct of polymer and nanoparticles, bitumen, asphalt and a method for producing the adduct |
| CN106751977A (en) * | 2017-03-24 | 2017-05-31 | 天津双君智材科技发展有限公司 | Heat-resisting pitch micro-crack selfreparing microcapsules high and preparation method thereof |
| CN107043548A (en) * | 2017-05-02 | 2017-08-15 | 广西交科新材料科技有限责任公司 | Bituminous paving High-performance rubber asphalt sealing compound and preparation method thereof |
| CN107652700A (en) * | 2017-10-31 | 2018-02-02 | 宁夏路桥工程股份有限公司 | The preparation method of durability modified pitch |
| WO2018039534A1 (en) * | 2016-08-25 | 2018-03-01 | Cornell University | Bitumen nanocomposites and uses thereof |
| CN108977079A (en) * | 2018-08-16 | 2018-12-11 | 马鞍山市永固防水科技有限公司 | A method of roof insulating water-proof pad bituminous coating is prepared with organo montmorillonite-aluminium hydroxide flame-retardant is modified |
| WO2019122670A1 (en) * | 2017-12-19 | 2019-06-27 | Total Marketing Services | Bituminous compositions comprising a clay having a high degradation temperature |
| CN111253763A (en) * | 2020-03-27 | 2020-06-09 | 广州市市维新材料科技有限公司 | Dispersed SBS modified asphalt mixture regenerant and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110330800B (en) * | 2019-07-18 | 2021-09-24 | 湖南鑫长胜材料科技有限公司 | Asphalt regenerant and preparation method thereof |
-
2020
- 2020-11-04 CN CN202011213554.1A patent/CN112094505B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1728831A1 (en) * | 2005-06-03 | 2006-12-06 | Nederlandse Organisatie voor toegepast-natuurwetenschappelijk Onderzoek TNO | Bitumen composition with improved ageing resistance |
| US20110232529A1 (en) * | 2008-10-02 | 2011-09-29 | Eurovia | Bituminous coating with great acoustic performance |
| CN101629020A (en) * | 2009-08-10 | 2010-01-20 | 江苏省建筑科学研究院有限公司 | Special regenerant suitable for regenerating modified asphalt and prepared method thereof |
| CN102618046A (en) * | 2012-03-31 | 2012-08-01 | 英达热再生有限公司 | SBS (styrene-butadiene-styrene) modified regenerant, preparation method thereof and asphalt regeneration method |
| CN103804936A (en) * | 2014-02-20 | 2014-05-21 | 重庆交通大学 | Waste SBS asphalt regenerant and preparation method thereof |
| DE102015109086A1 (en) * | 2015-06-09 | 2016-12-15 | Bergische Universität Wuppertal | Adduct of polymer and nanoparticles, bitumen, asphalt and a method for producing the adduct |
| CN105754356A (en) * | 2016-03-28 | 2016-07-13 | 长沙理工大学 | Asphalt regenerant as well as preparation method and application thereof |
| CN106009724A (en) * | 2016-06-17 | 2016-10-12 | 东南大学 | Modified regenerant and preparation method and application thereof |
| WO2018039534A1 (en) * | 2016-08-25 | 2018-03-01 | Cornell University | Bitumen nanocomposites and uses thereof |
| CN106751977A (en) * | 2017-03-24 | 2017-05-31 | 天津双君智材科技发展有限公司 | Heat-resisting pitch micro-crack selfreparing microcapsules high and preparation method thereof |
| CN107043548A (en) * | 2017-05-02 | 2017-08-15 | 广西交科新材料科技有限责任公司 | Bituminous paving High-performance rubber asphalt sealing compound and preparation method thereof |
| CN107652700A (en) * | 2017-10-31 | 2018-02-02 | 宁夏路桥工程股份有限公司 | The preparation method of durability modified pitch |
| WO2019122670A1 (en) * | 2017-12-19 | 2019-06-27 | Total Marketing Services | Bituminous compositions comprising a clay having a high degradation temperature |
| CN108977079A (en) * | 2018-08-16 | 2018-12-11 | 马鞍山市永固防水科技有限公司 | A method of roof insulating water-proof pad bituminous coating is prepared with organo montmorillonite-aluminium hydroxide flame-retardant is modified |
| CN111253763A (en) * | 2020-03-27 | 2020-06-09 | 广州市市维新材料科技有限公司 | Dispersed SBS modified asphalt mixture regenerant and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112094505A (en) | 2020-12-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112094505B (en) | SBS modified asphalt regenerant and preparation method thereof | |
| CN103044932B (en) | Method for preparing modified asphalt by using raw material with low asphaltene content | |
| CN101265363B (en) | Waste and old rubber powder modifying asphalt and preparation method thereof | |
| CN102977621A (en) | SBS (styrene-butadiene-styrene)/scrap rubber powder composite modified asphalt and preparation method thereof | |
| CN112251036A (en) | Waste SBS (styrene butadiene styrene) modified asphalt regenerant and preparation method and application thereof | |
| CN103773008A (en) | High-viscosity modified asphalt and preparation method thereof | |
| CN108727843A (en) | A kind of composite modified devulcanized rubber pitch and preparation method thereof | |
| CN114133754A (en) | A kind of TPK desulfurization rubber powder/SBS composite modified asphalt and preparation method thereof | |
| CN113185847A (en) | Environment-friendly economical asphalt composition and application thereof | |
| CN111218120A (en) | Polymer modified emulsified asphalt and preparation method thereof | |
| CN103044933A (en) | Polymer modified asphalt stabilizer composition | |
| CN115536921A (en) | Natural rubber material and preparation method thereof | |
| CN110922772A (en) | Modified epoxy asphalt particles and preparation and application thereof | |
| CN105778530A (en) | SBS-rubber composite modified asphalt and preparation method thereof | |
| CN102453333B (en) | Preparation method of polymer modified asphalt | |
| KR20180044065A (en) | Asphalt modifier and asphalt composition comprising the same | |
| CN110982288A (en) | Colored asphalt binder capable of being directly put into use and preparation method thereof | |
| CN108424661B (en) | Composite modified emulsified asphalt with excellent anti-stripping performance and preparation method thereof | |
| CN110628230A (en) | An environment-friendly high-viscosity and high-elasticity surface treatment material and its preparation method | |
| CN102977617A (en) | Composite asphalt composition and preparation method thereof | |
| CN105062100A (en) | Modified emulsified asphalt | |
| CN113637246B (en) | A method for preparing rubber using modified oil shale semi-coke as a reinforcing filler | |
| CN113416426B (en) | Preparation method of SBS (styrene butadiene styrene) composite modified asphalt | |
| CN110845857B (en) | A kind of high-performance special SBS modified asphalt and preparation method thereof | |
| CN109942923A (en) | A kind of formula for preparing Mooney viscosity and stablizing reclaimed rubber |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |