CN111978751A - Ultrahigh-viscosity modified asphalt and preparation method thereof - Google Patents
Ultrahigh-viscosity modified asphalt and preparation method thereof Download PDFInfo
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- CN111978751A CN111978751A CN202010938171.4A CN202010938171A CN111978751A CN 111978751 A CN111978751 A CN 111978751A CN 202010938171 A CN202010938171 A CN 202010938171A CN 111978751 A CN111978751 A CN 111978751A
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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
- 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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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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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- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
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Abstract
The invention belongs to the technical field of asphalt compositions, and particularly relates to ultrahigh-viscosity modified asphalt. The modified asphalt comprises: straight-run asphalt, thermoplastic rubber, thermoplastic resin, polyethylene and a compatilizer. The ultrahigh viscosity modified asphalt has good dispersibility; excellent in high-temperature storage stability.
Description
Technical Field
The invention belongs to the technical field of asphalt compositions, and particularly relates to ultrahigh-viscosity modified asphalt and a preparation method thereof.
Background
The ultrahigh viscosity modified asphalt is asphalt with absolute viscosity of more than 500000 Pa.s at 60 ℃, and is mainly used for paving heavy traffic road surfaces, drainage road surfaces and ultrathin overlay (the thickness is less than 2 cm).
The ultrahigh viscosity modified asphalt has strong anti-rutting capability; the viscosity is high, stone peeling can be avoided, and water damage is prevented; effectively reduce the noise, improve the noise environment around the road, alleviate driver's fatigue.
At present, ultra-high viscosity modified asphalt is mainly prepared by adding a high molecular polymer to petroleum asphalt. The high molecular polymer is added to modify the petroleum asphalt, so that the high-temperature performance and the low-temperature performance of the asphalt can be obviously improved, and the high-temperature anti-rutting and low-temperature anti-cracking capabilities of the asphalt pavement are improved.
However, the existing ultra-high viscosity modified asphalt has the following defects: the modified asphalt system has the disadvantages of difficult dispersion, poor high-temperature storage stability and easy delamination.
Disclosure of Invention
In view of the above, the present invention aims to provide an ultrahigh viscosity modified asphalt.
In order to achieve the purpose, the technical scheme of the invention is as follows:
an ultra-high viscosity modified asphalt comprising: straight-run asphalt, thermoplastic rubber, thermoplastic resin, polyethylene and a compatilizer.
The inventor unexpectedly finds that the method comprises the following steps: the modified asphalt system of the straight-run asphalt, the thermoplastic rubber, the thermoplastic resin, the polyethylene and the compatilizer has good dispersibility, excellent high-temperature storage stability and difficult delamination.
Further, the straight-run road asphalt comprises A-50 or A-70 petroleum asphalt.
Further, the thermoplastic rubber includes a styrene-isoprene-styrene block copolymer (SIS).
Further, the thermoplastic resin includes POE resin.
Further, the polyethylene comprises a thermally cracked polyethylene having a molecular weight of 2000-.
Further, the compatibilizer includes 1 to 3 of high aromatic oil, castor oil, and phthalic diester.
Further, the compatilizer comprises high aromatic oil, castor oil and phthalic diester, and the mass ratio of the high aromatic oil to the castor oil to the phthalic diester is 1-30:1-40: 1-30.
Further, the ultra-high viscosity asphalt further comprises: viscosity modifier, temperature reducer, stabilizer and anti-aging agent.
Further, the viscosity modifier includes 1 to 3 of terpene resin, terpene phenol resin and terpene-styrene resin.
Further, the temperature reducing agent comprises a combination of oxidized polyethylene wax and montan wax.
Further, the mass ratio of the oxidized polyethylene wax to the montan wax is 1-10: 10-1.
Further, the stabilizer includes sulfur.
Further, the anti-aging agent comprises a combination of an ultraviolet absorber UV-9, an antioxidant 1010 and an amine rubber anti-aging agent.
Further, the mass ratio of the ultraviolet absorbent UV-9 to the antioxidant 1010 to the amine rubber anti-aging agent is 100:10-120: 10-200.
Further, the ultrahigh-viscosity modified asphalt comprises the following components in parts by mass: 100 parts of straight-run asphalt, 6-20 parts of thermoplastic rubber, 4-30 parts of thermoplastic resin, 4-10 parts of polyethylene, 1-10 parts of compatilizer, 3-40 parts of viscosity regulator, 3-10 parts of cooling agent, 0.05-0.2 part of stabilizer and 0.5-4 parts of anti-aging agent.
The invention also aims to protect the preparation method of the modified asphalt, which comprises the following steps:
heating the dehydrated straight-run asphalt to 160-170 ℃, adding the compatilizer and the anti-aging agent while stirring, continuously heating to 185-plus-190 ℃, sequentially adding the thermoplastic rubber, the thermoplastic resin, the viscosity modifier, the polyethylene, the temperature reducer and the stabilizer, stirring for 0.5-3h at 185-plus-190 ℃, and then shearing to obtain the asphalt.
Further, the parameters of the shearing are set as: the rotating speed is 8000-.
The invention has the beneficial effects that:
the ultrahigh viscosity modified asphalt has good dispersibility.
The ultrahigh-viscosity modified asphalt of the present invention is excellent in high-temperature storage stability.
The ultrahigh viscosity modified asphalt has excellent water damage resistance.
The invention improves the bonding property of the modified asphalt and the mineral aggregate.
The modified asphalt provided by the invention has excellent elastic recovery performance.
The preparation method has simple process and convenient production, and is beneficial to realizing industrial production.
Detailed Description
The examples are provided for better illustration of the present invention, but the present invention is not limited to the examples. Therefore, those skilled in the art should make insubstantial modifications and adaptations to the embodiments of the present invention in light of the above teachings and remain within the scope of the invention.
Example 1
The modified asphalt is prepared by the following raw materials according to the following steps:
heating 1000kg of dehydrated shell-brand straight-run asphalt A70 to 160 ℃, adding 20kg of compatilizer (consisting of 4kg of high aromatic hydrocarbon oil TC-24, 10kg of castor oil and 6kg of phthalic diester) while stirring, adding 10kg of anti-aging agent (consisting of 5kg of ultraviolet absorbent UV-9, 2.5kg of antioxidant 1010 and 2.5kg of amine rubber anti-aging agent 4040 NA), continuously heating to 190 ℃, sequentially adding 120kg of thermoplastic rubber SIS, 60kg of thermoplastic resin POE resin, 80kg of viscosity-adjusting agent terpene resin T-110, 50kg of thermal cracking polyethylene (with the molecular weight of 2000-plus 5000), 40kg of temperature reducer (consisting of 20kg of oxidized rubber and 20kg of lignite wax) and 1kg of stabilizer sulfur, stirring for 2 hours at the temperature of 190 ℃, and shearing for 120min at the rotation speed of 14000r/min by using a high-speed shearing machine to obtain the polyethylene wax.
Example 2
The modified asphalt is prepared by the following raw materials according to the following steps:
heating 1000kg of dehydrated shell-brand straight-run asphalt A70 to 160 ℃, adding 60kg of compatilizer (consisting of 20kg of high aromatic hydrocarbon oil TC-24, 25kg of castor oil and 15kg of phthalic diester) while stirring, adding 10kg of anti-aging agent (consisting of 2kg of ultraviolet absorbent UV-9, 4kg of antioxidant 1010 and 4kg of amine rubber anti-aging agent 4040 NA), continuously heating to 185 ℃, sequentially adding 80kg of thermoplastic rubber SIS, 280kg of thermoplastic resin POE resin, 80kg of viscosity-adjusting agent terpene-phenol resin T-110, 100kg of thermal cracking polyethylene (with the molecular weight of 2000-5000), 100kg of cooling agent (consisting of 65kg of oxidized polyethylene wax and 35kg of montan wax) and 2kg of stabilizer sulfur, carrying out heat preservation and stirring for 2h at 185 ℃, and then shearing for 90min at the rotation speed of 28000r/min by using a high-speed shearing machine to obtain the anti-aging agent.
Example 3
The modified asphalt is prepared by the following raw materials according to the following steps:
heating 1000kg of dehydrated S-straight-run asphalt A70 to 160 ℃, adding 50kg of compatilizer (consisting of 10kg of high aromatic hydrocarbon oil TC-24, 25kg of castor oil and 15kg of phthalic diester) and 10kg of anti-aging agent (consisting of 2kg of ultraviolet absorbent UV-9, 5kg of antioxidant 1010 and 3kg of amine rubber anti-aging agent 4040 NA) while stirring, continuously heating to 190 ℃, sequentially adding 120kg of thermoplastic rubber SIS, 200kg of thermoplastic resin POE resin, 120kg of viscosity-adjusting agent terpene-styrene resin TR90, 60kg of thermal cracking polyethylene (with the molecular weight of 2000-type polyethylene), 70kg of cooling agent (consisting of 40kg of oxidized polyethylene wax and 30kg of lignite wax) and 2kg of stabilizer sulfur, stirring for 2.5 hours at the temperature of 190 ℃, and then shearing for 100 minutes at the rotation speed of 24000r/min by using a high-speed shearing machine to obtain the anti-aging agent.
Example 4
The modified asphalt is prepared by the following raw materials according to the following steps:
heating 1000kg of dehydrated middle-sea straight-run asphalt A50 to 160 ℃, adding 50kg of compatilizer (consisting of 10kg of high aromatic hydrocarbon oil TC-24, 20kg of castor oil and 20kg of phthalic diester) and 10kg of anti-aging agent (consisting of 2kg of ultraviolet absorbent UV-9, 6kg of antioxidant 1010 and 2kg of amine rubber anti-aging agent 4040 NA) while stirring, continuously heating to 190 ℃, sequentially adding 160kg of thermoplastic rubber SIS, 140kg of thermoplastic resin POE resin, 200kg of viscosity-adjusting agent terpene phenol resin T-110, 80kg of thermal cracking polyethylene (with the molecular weight of 2000-5000), 80kg of cooling agent (consisting of 60kg of oxidized polyethylene wax and 20kg of lignite wax) and 2kg of stabilizer sulfur, stirring for 01.5h at 190 ℃, and shearing for 120min at the rotation speed of 20000r/min by using a high-speed shearing machine to obtain the anti-corrosion asphalt.
Example 5
The modified asphalt is prepared by the following raw materials according to the following steps:
heating 1000kg of dehydrated Tapuk straight-run asphalt A70 to 160 ℃, adding 30kg of compatilizer (consisting of 8kg of high aromatic hydrocarbon oil TC-24, 12kg of castor oil and 10kg of phthalic diester) while stirring, adding 10kg of anti-aging agent (consisting of 1kg of ultraviolet absorbent UV-9, 6kg of antioxidant 1010 and 3kg of amine rubber anti-aging agent 4040 NA), continuously heating to 190 ℃, sequentially adding 200kg of thermoplastic rubber SIS, 80kg of thermoplastic resin POE resin, 260kg of viscosity modifier (consisting of 80kg of terpene resin T-110, 100kg of terpene phenol resin T-110 and 80kg of terpene-styrene resin TR 90), 40kg of thermal cracking polyethylene (molecular weight of 2000-5000), 50kg of temperature reducer (consisting of 40kg of polyethylene wax oxide and 10kg of montan wax) and 2kg of stabilizer sulfur, preserving heat for 3h at 190 ℃, and then shearing for 70min at the rotation speed of 28000 r/280min by using a high-speed shearing machine, and (5) obtaining the product.
Performance detection
The modified asphalt prepared in examples 1 to 5 was tested for penetration at 25 ℃, softening point, elastic recovery at 25 ℃, dynamic viscosity at 60 ℃ and segregation, and the test results are shown in table 1;
wherein the softening point is tested according to T0606-2011 in JTG E20-2011 road engineering asphalt and asphalt mixture test specification;
the penetration is tested according to a formula calculation method of T0604-2011 in JTG E20-2011 road engineering asphalt and asphalt mixture test regulation;
the elastic recovery is tested according to T0662-2000 in JTG E20-2011 road engineering asphalt and asphalt mixture test regulation;
the dynamic viscosity at 60 ℃ is tested according to T0620-2000 in JTG E20-2011 road engineering asphalt and asphalt mixture test specification;
the segregation was tested according to T0661-2011 of JTG E20-2011 road engineering asphalt and asphalt mixture test protocol.
TABLE 1 Performance test results
| Detecting items | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 |
| Penetration/0.1 mm at 25 ℃ | 30 | 28 | 30 | 32 | 29 |
| Softening point/. degree.C | 101 | 104 | 101 | 99 | 100 |
| 25 ℃ elastic recovery% | 98 | 95 | 98 | 97 | 99 |
| Isolation/. degree.C | 1.2 | 1.0 | 1.3 | 1.2 | 0.8 |
| Dynamic viscosity at 60 ℃ per Pa.s | 721000 | 653000 | 718200 | 634600 | 528900 |
As is clear from Table 1, the modified asphalts of examples 1 to 5 had penetration values of 28 to 32(0.1mm), softening points of 99 to 104 ℃ and elastic recoveries at 25 ℃ of 95 to 99%. Thus, the modified asphalt of the present invention is excellent in high-temperature storage stability and excellent in elastic recovery properties.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (14)
1. Modified asphalt is characterized by comprising: straight-run asphalt, thermoplastic rubber, thermoplastic resin, polyethylene and a compatilizer.
2. The modified asphalt of claim 1, wherein the straight-run road asphalt comprises a-50 or a-70 petroleum asphalt.
3. The modified asphalt of claim 1 or 2, wherein the thermoplastic rubber comprises a styrene-isoprene-styrene block copolymer.
4. The modified asphalt of any one of claims-3, wherein the thermoplastic resin comprises POE resin.
5. The modified asphalt of any one of claims 1 to 4, wherein the polyethylene comprises a thermally cracked polyethylene having a molecular weight of 2000-.
6. The modified asphalt of any one of claims 1 to 5, wherein the compatibilizer comprises a mixture of a highly aromatic oil, castor oil, and a diester of phthalic acid.
7. The modified asphalt of claim 6, wherein the compatibilizer comprises a high aromatic oil, castor oil, and a diester phthalate, and the mass ratio of the high aromatic oil, the castor oil, and the diester phthalate is 1-30:1-40: 1-30.
8. A bituminous asphalt according to any of claims 1 to 7, further comprising: viscosity modifier, temperature reducer, stabilizer and anti-aging agent.
9. The modified asphalt of claim 8, wherein the viscosity modifier comprises 1 to 3 of terpene resin, terpene phenol resin and terpene-styrene resin.
10. The modified asphalt of claim 8 or 9, wherein the temperature reducing agent comprises a combination of oxidized polyethylene wax and montan wax.
11. Modified asphalt according to any of claims 8-10, characterized in that the stabilizer comprises sulphur.
12. The modified asphalt of any one of claims 8 to 11, wherein the anti-aging agent comprises a combination of an ultraviolet absorber UV-9, an antioxidant 1010 and an amine-based rubber anti-aging agent.
13. The modified asphalt according to any one of claims 8 to 12, wherein the compounding ratio is, in parts by mass: 100 parts of straight-run asphalt, 6-20 parts of thermoplastic rubber, 4-30 parts of thermoplastic resin, 4-10 parts of polyethylene, 1-10 parts of compatilizer, 8-40 parts of viscosity regulator, 3-10 parts of cooling agent, 0.05-0.2 part of stabilizer and 0.5-4 parts of anti-aging agent.
14. A process for producing a modified asphalt according to any one of claims 8 to 13, characterized in that: the method comprises the following steps:
heating the dehydrated straight-run asphalt to 160-170 ℃, adding the compatilizer and the anti-aging agent while stirring, continuously heating to 185-plus-190 ℃, sequentially adding the thermoplastic rubber, the thermoplastic resin, the viscosity modifier, the polyethylene, the temperature reducer and the stabilizer, stirring for 0.5-3h at 185-plus-190 ℃, and then shearing to obtain the asphalt.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112745765A (en) * | 2020-12-29 | 2021-05-04 | 深圳市卓宝科技股份有限公司 | Hot-melt rubber asphalt waterproof coating and preparation method and application thereof |
| CN114163811A (en) * | 2022-01-07 | 2022-03-11 | 安徽露德新材料科技有限公司 | Multifunctional thin-layer modifier for high-ductility ultrathin overlay asphalt mixture |
| CN115124276A (en) * | 2022-06-10 | 2022-09-30 | 西安市第二市政工程公司 | Colored asphalt pavement and preparation method thereof |
| CN116063860A (en) * | 2022-12-09 | 2023-05-05 | 广州公路工程集团有限公司 | Composite polymer high-viscosity modified asphalt and preparation method thereof |
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