CN111218052A - Asphalt modifier prepared from waste plastic films and preparation method thereof - Google Patents
Asphalt modifier prepared from waste plastic films and preparation method thereof Download PDFInfo
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- CN111218052A CN111218052A CN202010255042.5A CN202010255042A CN111218052A CN 111218052 A CN111218052 A CN 111218052A CN 202010255042 A CN202010255042 A CN 202010255042A CN 111218052 A CN111218052 A CN 111218052A
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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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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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
- C08L19/00—Compositions of rubbers not provided for in groups C08L7/00 - C08L17/00
- C08L19/003—Precrosslinked rubber; Scrap rubber; Used vulcanised rubber
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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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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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
- 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
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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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/20—Recycled plastic
Abstract
The invention discloses an asphalt modifier prepared by utilizing waste plastic films and a preparation method thereof, wherein the asphalt modifier comprises the following components in parts by weight: PE/PP recycled plastic particles: 50-80 parts of waste rubber powder: 10-40 parts of SBS: 5-10 parts of coupling agent: 0.5-2 parts of a cross-linking agent: 0.1-0.25 parts of antioxidant A: 0.5-2 parts of antioxidant B: 0.2-1 part of lubricant: 2-5 parts of inorganic filler: 5-10 parts. The invention has the advantages that the penetration degree, the softening point and the ductility of the matrix asphalt can be effectively improved, and the dynamic stability is obviously improved.
Description
Technical Field
The invention relates to the technical field of resource utilization of waste plastics in household garbage, in particular to an asphalt modifier prepared by utilizing waste plastic films and a preparation method thereof.
Background
Domestic garbage in China contains a large amount of waste plastic films (mainly PE and PP films) which account for about 5-10% of the total amount of the domestic garbage, and because the waste plastics are of different quality and are difficult to recycle, the waste plastic films are usually buried or burned as dry garbage in the process of collecting and transporting the domestic garbage. However, such a disposal method not only causes serious secondary pollution to the environment, but also causes a certain waste of resources. Therefore, the problem of recycling the waste plastic films in the domestic garbage becomes a serious problem currently faced by China.
With the rapid development of economy in China, the road traffic flow is increasing day by day, the number of overloaded and heavy-duty vehicles is large, the road surfaces in certain regions can face extreme climatic conditions, a great number of asphalt road surfaces of expressways and other grades of roads generate a great amount of deformation damage and are forced to be repaired in a large area without reaching the designed service life, common road surface damages comprise road surface diseases such as rutting, fatigue cracking, low-temperature freeze-thaw cracking, water damage, aging and the like easily generated at high temperature, the maintenance cost of the roads is increased, and road congestion is caused. Therefore, the asphalt pavement material must be modified to improve the rutting resistance and the low-temperature freeze-thaw cracking resistance, and the asphalt modifier is a commonly used modified material for asphalt pavement. At present, a method for preparing an asphalt modifier by using waste plastic films is available, for example, chinese patent application No. 201710089546.2 discloses a method for producing an asphalt modifier by using waste mulching films, which produces an asphalt modifier by using waste mulching films, so that waste resources are recycled, and the stability of asphalt is improved. The SBS asphalt modifier is a commonly used asphalt modifier at present, but the cost is high, and the maintenance cost of the road can be increased by using a large amount of the SBS asphalt modifier.
Disclosure of Invention
The invention aims to provide an asphalt modifier prepared by utilizing waste plastic films and a preparation method thereof.
The technical purpose of the invention is realized by the following technical scheme:
the asphalt modifier prepared by utilizing the waste plastic film is characterized by comprising the following components in parts by weight:
50-80 parts of PE/PP recycled plastic particles
10-40 parts of waste rubber powder
SBS 5-10 parts
0.5-2 parts of coupling agent
0.1 to 0.25 portion of cross-linking agent
0.5-2 parts of antioxidant A
0.2-1 part of antioxidant B
2-5 parts of lubricant
5-10 parts of inorganic filler.
Preferably, the PE/PP recycled plastic particles are obtained by processing waste plastic films separated from recycled household garbage.
Preferably, the waste rubber powder is prepared from waste tires or waste rubber shoes, and the particle size of the waste rubber powder is 40-100 meshes.
Preferably, the coupling agent is selected from one of a silane coupling agent or a titanate coupling agent.
Preferably, the crosslinking agent is selected from one or more of sulfur, a sulfur-containing compound, dicumyl peroxide (DCP), ZnO and MgO.
Preferably, the antioxidant A is selected from one or more of antioxidant 1010, antioxidant 1024 or antioxidant 1076.
Preferably, the antioxidant B is selected from one of antioxidant 168 or antioxidant 126.
Preferably, the lubricant is one or two of paraffin or calcium stearate.
Preferably, the inorganic filler is a combination of calcium carbonate and carbon black, wherein the mass ratio of the calcium carbonate to the carbon black is 5: 1.
a preparation method of an asphalt modifier prepared by utilizing waste plastic films is characterized by comprising the following steps:
(1) sequentially carrying out shredding, crushing, friction cleaning, primary rinsing, secondary rinsing, squeezing dehydration, granulation and other technical processes on waste plastic films selected from the recycled household garbage to obtain PE/PP recycled plastic particles;
(2) respectively drying the PE/PP recycled plastic particles, the waste rubber powder and the SBS at 70-90 ℃ for 4-5 hours;
(3) mixing all the raw material components in the claim 1 in a high-speed mixer for 10-25min to obtain premix;
(4) adding the premix into a double-screw extruder for melt extrusion granulation, wherein the granulation temperature is 170 ℃ and 210 ℃, and the screw rotation speed is 40-80 r/min;
(5) and (3) drying the extruded melt for 3-5 hours at 75-85 ℃ after water cooling, bracing and granulating to obtain the asphalt modifier material.
In conclusion, the invention has the following beneficial effects:
(1) the main raw material component of the invention is waste plastic film in the domestic garbage, the recycled waste plastic is utilized to process the asphalt modifier, the resource recycling is realized, the invention has certain environmental protection property, meanwhile, the waste plastic has wide source and low price, and the prepared asphalt modifier material has low cost and is easy to be accepted by the market.
(2) The regenerated PE/PP plastic particles prepared by using the waste plastic films in the household garbage have better heat resistance, can effectively improve the high-temperature rutting resistance of the pavement asphalt by being used as the main component of the asphalt modifier, simultaneously, the compounding of the calcium carbonate and the carbon black can further improve the heat resistance and the fatigue resistance of the asphalt, the waste rubber powder and the SBS can improve the low-temperature resistance of the asphalt and effectively improve the low-temperature freeze-thaw cracking resistance of the asphalt, and the addition of the coupling agent and the crosslinking agent further improves the compatibility, the dispersibility and the elasticity of the materials and ensures the stability and the strength of the asphalt. The addition of the antioxidant can effectively improve the aging resistance of the asphalt and slow down the aging cracking of the asphalt on the pavement.
(3) The asphalt modifier in the application has a simple preparation process, and is easy to realize industrial production.
Detailed Description
The following further describes the embodiments of the present invention, which are not to be construed as limiting the invention.
Example 1
The asphalt modifier in the embodiment comprises the following components in parts by weight: 55 parts of PE/PP recycled plastic particles, 30 parts of waste rubber powder, 5 parts of SBS, and a coupling agent: 1.3 parts of silane coupling agent, crosslinking agent: dicumyl peroxide (DCP) 0.2 parts, antioxidant A: 0.5 part of antioxidant 1010, and antioxidant B: 0.3 part of antioxidant 126, and lubricant: 2 parts of paraffin and 6.5 parts of inorganic filler, wherein the waste rubber powder is prepared from waste tires or waste rubber shoes, the particle size of the waste rubber powder is 40-100 meshes, the inorganic filler is a composition of calcium carbonate and carbon black, and the mass ratio of the calcium carbonate to the carbon black is 5: SBS is a triblock copolymer of styrene and butadiene, where S represents polystyrene, B represents polybutadiene, and SBS is a linear copolymer.
The preparation method of the asphalt modifier comprises the following steps:
(1) sequentially carrying out shredding, crushing, friction cleaning, primary rinsing, secondary rinsing, squeezing dehydration, granulation and other technical processes on waste plastic films selected from the recycled household garbage to obtain PE/PP recycled plastic particles;
(2) respectively drying the PE/PP recycled plastic particles, the waste rubber powder and the SBS for 4 hours at the temperature of 80 ℃;
(3) mixing the raw material components in the claim 1 in a high-speed mixer for 15min to obtain a premix;
(4) adding the premix into a double-screw extruder, and performing melt extrusion granulation, wherein the temperature of each section of the extruder (from a feed inlet to a machine head outlet) is controlled to be 170 ℃, 180 ℃, 190 ℃, 200 ℃ and 210 ℃, and the screw rotation speed is 60 revolutions per minute;
(5) and drying the extruded melt for 3 hours at 75 ℃ after water cooling, bracing and granulating to obtain the asphalt modifier material.
Preparing modified asphalt: adding 2000g of matrix asphalt into a reaction kettle, stirring and heating to 150 ℃, adding 300g of asphalt modifier under the stirring state, keeping strong stirring for 30 minutes, stirring at 2000r/min, and controlling the temperature at 160 ℃ during stirring to obtain the modified asphalt.
Example 2
The asphalt modifier in the embodiment comprises the following components in parts by weight: 65 parts of PE/PP recycled plastic particles, 15 parts of waste rubber powder, 7 parts of SBS, and a coupling agent: 1.3 parts of titanate coupling agent, crosslinking agent: dicumyl peroxide (DCP) 0.1 part, antioxidant A1 part, antioxidant B: 0.6 part of antioxidant 168, and lubricant: 2 parts of paraffin and 8 parts of inorganic filler, wherein the waste rubber powder is prepared from waste tires or waste rubber shoes, the particle size of the waste rubber powder is 40-100 meshes, the antioxidant A is a composition of antioxidant 1010 and antioxidant 1024, and the mass ratio of the antioxidant 1010 to the antioxidant 1024 is 1: the inorganic filler is a composition of calcium carbonate and carbon black, wherein the mass ratio of the calcium carbonate to the carbon black is 5: SBS is a triblock copolymer of styrene and butadiene, where S represents polystyrene, B represents polybutadiene, and SBS is a linear copolymer.
The preparation method of the asphalt modifier comprises the following steps:
(1) sequentially carrying out shredding, crushing, friction cleaning, primary rinsing, secondary rinsing, squeezing dehydration, granulation and other technical processes on waste plastic films selected from the recycled household garbage to obtain PE/PP recycled plastic particles;
(2) respectively drying the PE/PP recycled plastic particles, the waste rubber powder and the SBS at the temperature of 80 ℃ for 5 hours;
(3) mixing the raw material components in the claim 1 in a high-speed mixer for 10min to obtain a premix;
(4) adding the premix into a double-screw extruder, and performing melt extrusion granulation, wherein the temperature of each section of the extruder (from a feed inlet to a machine head outlet) is controlled to be 170 ℃, 180 ℃, 190 ℃, 200 ℃ and 210 ℃, and the screw rotation speed is 80 r/min;
(5) and drying the extruded melt for 4 hours at 80 ℃ after water cooling, bracing and granulating to obtain the asphalt modifier material.
Preparing modified asphalt: adding 2000g of matrix asphalt into a reaction kettle, stirring and heating to 150 ℃, adding 300g of asphalt modifier under the stirring state, keeping strong stirring for 30 minutes, stirring at 2000r/min, and controlling the temperature at 160 ℃ during stirring to obtain the modified asphalt.
Example 3
The asphalt modifier in the embodiment comprises the following components in parts by weight: 70 parts of PE/PP recycled plastic particles, 5 parts of waste rubber powder, 10 parts of SBS, and a coupling agent: 1.25 parts of titanate coupling agent, crosslinking agent: 0.1 part of sulfur, an antioxidant A: 0.5 part of antioxidant 1076, and antioxidant B: 0.85 part of antioxidant 168, and lubricant: 2 parts of calcium stearate and 9.5 parts of inorganic filler, wherein the waste rubber powder is prepared from waste tires or waste rubber shoes, the particle size of the waste rubber powder is 40-100 meshes, the inorganic filler is a composition of calcium carbonate and carbon black, and the mass ratio of the calcium carbonate to the carbon black is 5: SBS is a triblock copolymer of styrene and butadiene, where S represents polystyrene, B represents polybutadiene, and SBS is a linear copolymer.
The preparation method of the asphalt modifier comprises the following steps:
(1) sequentially carrying out shredding, crushing, friction cleaning, primary rinsing, secondary rinsing, squeezing dehydration, granulation and other technical processes on waste plastic films selected from the recycled household garbage to obtain PE/PP recycled plastic particles;
(2) respectively drying the PE/PP recycled plastic particles, the waste rubber powder and the SBS at the temperature of 80 ℃ for 5 hours;
(3) mixing the raw material components in the claim 1 in a high-speed mixer for 25min to obtain a premix;
(4) adding the premix into a double-screw extruder, and performing melt extrusion granulation, wherein the temperature of each section of the extruder (from a feed inlet to a machine head outlet) is controlled to be 170 ℃, 180 ℃, 190 ℃, 200 ℃ and 210 ℃, and the screw rotation speed is 60 revolutions per minute;
(5) and drying the extruded melt for 5 hours at 85 ℃ after water cooling, bracing and granulating to obtain the asphalt modifier material.
Preparing modified asphalt: adding 2000g of matrix asphalt into a reaction kettle, stirring and heating to 150 ℃, adding 300g of asphalt modifier under the stirring state, keeping strong stirring for 30 minutes, stirring at 2000r/min, and controlling the temperature at 160 ℃ during stirring to obtain the modified asphalt.
Example 4
The cement test was performed on the base asphalt and the modified asphalt prepared by using the asphalt modifier of example 1, example 2, and example 3 according to JTGE20-2011 road engineering asphalt and asphalt mixture test procedures, and the specific data are shown in table 1:
| test items | Unit of | Base asphalt | Example 1 | Example 2 | Example 3 |
| Penetration (25 ℃ C.) | 1/10mm | 50.6 | 59.8 | 70.2 | 65.4 |
| Softening point | ℃ | 43.7 | 50.2 | 63.8 | 60.5 |
| Ductility (5 ℃ C.) | cm | 35.5 | 40.9 | 48.7 | 46.2 |
| Degree of dynamic stability | Sub/mm | 860 | 2862 | 3657 | 3874 |
TABLE 1
As can be seen from Table 1, the penetration, softening point and ductility of the modified asphalt with the modifier are improved to some extent, which is specifically shown as follows: the penetration degree of the modified asphalt is obviously improved compared with that before modification, which shows that the deformation resistance of the asphalt is improved; the softening point of the modified asphalt is obviously improved, and the high-temperature performance of the modified asphalt is obviously improved; the ductility of the modified asphalt at 5 ℃ is obviously improved, which shows that the low-temperature cracking resistance of the asphalt is improved; the dynamic stability of the modified asphalt is obviously improved, which shows that the anti-rutting property of the modified asphalt is improved.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention.
Claims (10)
1. The asphalt modifier prepared by utilizing the waste plastic film is characterized by comprising the following components in parts by weight:
50-80 parts of PE/PP recycled plastic particles
10-40 parts of waste rubber powder
SBS 5-10 parts
0.5-2 parts of coupling agent
0.1 to 0.25 portion of cross-linking agent
0.5-2 parts of antioxidant A
0.2-1 part of antioxidant B
2-5 parts of lubricant
5-10 parts of inorganic filler.
2. The asphalt modifier prepared by using the waste plastic films as claimed in claim 1, which is characterized in that: the PE/PP recycled plastic particles are obtained by processing waste plastic films separated from the recycled household garbage.
3. The asphalt modifier prepared by using the waste plastic films as claimed in claim 1, which is characterized in that: the waste rubber powder is prepared from waste tires or waste rubber shoes, and the particle size of the waste rubber powder is 40-100 meshes.
4. The asphalt modifier prepared by using the waste plastic films as claimed in claim 1, which is characterized in that: the coupling agent is selected from one of silane coupling agent or titanate coupling agent.
5. The asphalt modifier prepared by using the waste plastic films as claimed in claim 1, which is characterized in that: the cross-linking agent is selected from one or more of sulfur, a sulfur-containing compound, dicumyl peroxide (DCP), ZnO and MgO.
6. The asphalt modifier prepared by using the waste plastic films as claimed in claim 1, which is characterized in that: the antioxidant A is selected from one or more of antioxidant 1010, antioxidant 1024 or antioxidant 1076.
7. The asphalt modifier prepared by using the waste plastic films as claimed in claim 1, which is characterized in that: the antioxidant B is selected from one of antioxidant 168 or antioxidant 126.
8. The asphalt modifier prepared by using the waste plastic films as claimed in claim 1, which is characterized in that: the lubricant is one or two of paraffin or calcium stearate.
9. The asphalt modifier prepared by using the waste plastic films as claimed in claim 1, which is characterized in that: the inorganic filler is a composition of calcium carbonate and carbon black, wherein the mass ratio of the calcium carbonate to the carbon black is 5: 1.
10. a preparation method of an asphalt modifier prepared by utilizing waste plastic films is characterized by comprising the following steps:
(1) sequentially carrying out shredding, crushing, friction cleaning, primary rinsing, secondary rinsing, squeezing dehydration, granulation and other technical processes on waste plastic films selected from the recycled household garbage to obtain PE/PP recycled plastic particles;
(2) respectively drying the PE/PP recycled plastic particles, the waste rubber powder and the SBS at 70-90 ℃ for 4-5 hours;
(3) mixing all the raw material components in the claim 1 in a high-speed mixer for 10-25min to obtain premix;
(4) adding the premix into a double-screw extruder for melt extrusion granulation, wherein the granulation temperature is 170 ℃ and 210 ℃, and the screw rotation speed is 40-80 r/min;
(5) and (3) drying the extruded melt for 3-5 hours at 75-85 ℃ after water cooling, bracing and granulating to obtain the asphalt modifier material.
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| CN114805987A (en) * | 2022-05-31 | 2022-07-29 | 东莞市基烁实业有限公司 | High-temperature-resistance and high-viscosity asphalt modified material, modified asphalt and preparation method |
| CN115785562A (en) * | 2022-12-03 | 2023-03-14 | 太原理工大学 | Preparation method of waste plastic-rubber copolymerized core-shell particles and modified asphalt thereof |
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| CN114805987A (en) * | 2022-05-31 | 2022-07-29 | 东莞市基烁实业有限公司 | High-temperature-resistance and high-viscosity asphalt modified material, modified asphalt and preparation method |
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| CN115785562A (en) * | 2022-12-03 | 2023-03-14 | 太原理工大学 | Preparation method of waste plastic-rubber copolymerized core-shell particles and modified asphalt thereof |
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Application publication date: 20200602 |