CN114163811A - Multifunctional thin-layer modifier for high-ductility ultrathin overlay asphalt mixture - Google Patents
Multifunctional thin-layer modifier for high-ductility ultrathin overlay asphalt mixture Download PDFInfo
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- CN114163811A CN114163811A CN202210015692.1A CN202210015692A CN114163811A CN 114163811 A CN114163811 A CN 114163811A CN 202210015692 A CN202210015692 A CN 202210015692A CN 114163811 A CN114163811 A CN 114163811A
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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
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
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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
- C08L2207/04—Thermoplastic elastomer
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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
- C08L2207/06—Properties of polyethylene
- C08L2207/066—LDPE (radical process)
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Abstract
The invention discloses a multifunctional thin-layer modifier for a high-ductility ultrathin overlay asphalt mixture, which comprises the following components in parts by weight: 52-58 parts of thermoplastic elastomer materials, 25-30 parts of polyvinyl butyral, 2-4 parts of p-tert-butylphenol formaldehyde resin, 2-4 parts of chloropropane resin ethylene-propylene copolymer, 5-8 parts of high-molecular organic wax and 3-5 parts of asphalt regeneration materials, wherein the multifunctional thin-layer modifier can greatly improve the bonding capacity of the mixture after being used for producing a high-ductility elastic ultrathin overlay asphalt mixture and is not easy to scatter and peel off; meanwhile, the high-temperature performance, the adhesion performance, the water damage resistance performance, especially the fatigue resistance performance of the asphalt mixture are obviously improved, so that the pavement performance and the durability of the ultrathin overlay asphalt mixture are obviously improved, and the road has the characteristics of high ductility, elasticity, thin layer, crack resistance, skid resistance, low noise, good durability, suitability for different climatic conditions and the like.
Description
Technical Field
The invention relates to the technical field of road pavement, in particular to a multifunctional thin-layer modifier for a high-ductility ultra-thin overlay asphalt mixture.
Background
The ultrathin overlay is a functional overlay with the paving thickness of less than 25mm, is suitable for preventing or repairing diseases of various grades of roads, needs to improve the service performance such as skid resistance and the like, and has structural strength meeting the use requirement of the asphalt pavement.
Asphalt pavement is an important pavement form in the construction of highways and urban roads. The ultrathin overlay asphalt mixture is mainly used for preventive maintenance of roads and urban asphalt pavements and corrective maintenance of slight diseases, can also be used as a surface wearing layer of a newly-built road, has the characteristics of skid resistance, noise reduction, wear resistance, environmental protection and the like, and can effectively improve the pavement evenness and improve the road running conditions. However, in reality, the traditional ultra-thin cover surface does not have good ductility and elasticity, and the vehicle running experience is influenced.
In order to alleviate the problem, and enable the asphalt mixture to be suitable for different road conditions, meet different maintenance requirements, and have good high-temperature stability, low-temperature crack resistance, fatigue cracking resistance, reflection cracking resistance, loosening resistance, and thin-layer and wide-temperature-range construction characteristics, the invention of a multifunctional thin-layer modifier for a high-ductility-elasticity ultrathin overlay asphalt mixture is urgently needed.
Disclosure of Invention
The invention aims to provide a multifunctional thin-layer modifier for a high-ductility ultrathin overlay asphalt mixture, which can enable a road to have the characteristics of high ductility and elasticity, thin layer, crack resistance, skid resistance, low noise, good durability, suitability for different climatic conditions and the like.
The purpose of the invention can be realized by the following technical scheme:
a multifunctional thin-layer modifier for a high-ductility ultrathin overlay asphalt mixture is prepared by the following steps:
the method comprises the following steps: heating a thermoplastic elastomer material to 155-165 ℃, adding polyvinyl butyral, and uniformly stirring to obtain a mixture A;
step two: adding p-tert-butylphenol formaldehyde resin, chloropropane resin ethylene-propylene copolymer and high molecular organic wax into the mixture A, raising the temperature to 175-185 ℃, and shearing to obtain a mixture B;
step three: and adding an asphalt regeneration material into the mixture B at 175-185 ℃, and stirring and reacting for 150-360 min at a rotating speed of 100-250 r/min until the materials are uniform and have no particles, thus obtaining the multifunctional thin-layer modifier.
As a further scheme of the invention: the thermoplastic elastomer material is a block copolymer consisting of a high-melting-point crystalline polyamide hard segment and an amorphous polyether or polyester soft segment.
As a further scheme of the invention: the polyvinyl butyral is a product obtained by condensing polyvinyl alcohol and butyraldehyde under the catalysis of acid.
As a further scheme of the invention: the p-tert-butylphenol formaldehyde resin is oil-soluble phenolic resin prepared by condensation polymerization of formaldehyde and p-tert-butylphenol.
As a further scheme of the invention: in the first step, the stirring speed is 200-400 r/min, and the stirring time is 20-60 min.
As a further scheme of the invention: in the second step, the shearing and stirring speed is 3000-6000 r/min, and the shearing time is 30-60 min.
As a further scheme of the invention: the asphalt regeneration material is prepared by mixing low-density polyethylene, asphaltene and industrial waste engine oil according to the mass ratio of 1:1: 8;
wherein the low density polyethylene has a molecular weight of 8000 to 12000.
As a further scheme of the invention: the multi-energy-efficiency thin-layer modifier comprises the following components in parts by weight: 52-58 parts of thermoplastic elastomer material, 25-30 parts of polyvinyl butyral, 2-4 parts of p-tert-butylphenol formaldehyde resin, 2-4 parts of chloropropyl resin ethylene-propylene copolymer, 5-8 parts of high molecular organic wax and 3-5 parts of asphalt regeneration material.
As a further scheme of the invention: a high-ductility ultra-thin overlay asphalt mixture is prepared by adding a multi-energy-efficiency thin-layer modifier into an asphalt mixture and fully mixing to obtain an asphalt mixture finished product, wherein the multi-energy-efficiency thin-layer modifier accounts for 6.0-9.0% of the dosage of the asphalt mixture.
The invention has the beneficial effects that: after the multifunctional thin-layer modifier is used for producing a high-ductility and elastic ultrathin overlay asphalt mixture, the self bonding capability of the mixture can be greatly improved, and the mixture is not easy to disperse and peel; meanwhile, the high-temperature performance, the adhesion performance and the water damage resistance performance, especially the fatigue resistance performance, of the asphalt mixture are obviously improved, so that the pavement performance and the durability of the ultrathin overlay asphalt mixture are obviously improved.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The invention relates to a multifunctional thin-layer modifier for a high-ductility ultrathin overlay asphalt mixture, which comprises the following components in parts by weight: 55 parts of thermoplastic elastomer material, 27.5 parts of polyvinyl butyral, 3 parts of p-tert-butylphenol formaldehyde resin, 3 parts of chloropropyl resin ethylene-propylene copolymer, 6.5 parts of high molecular organic wax and 4 parts of asphalt regeneration material;
the multifunctional thin-layer modifier is prepared by the following steps:
the method comprises the following steps: heating a thermoplastic elastomer material to 155-165 ℃, adding polyvinyl butyral, and reacting for 20-60 min under stirring at a rotating speed of 200-400 r/min to obtain a mixture A;
the thermoplastic elastomer material is a polyamide thermoplastic elastomer (TPAE), and a block copolymer consisting of a high-melting-point crystalline polyamide hard segment and an amorphous polyether or polyester soft segment has good mechanical property and elasticity, and excellent wear resistance and flexibility, and is a thermoplastic elastomer suitable for being used at high temperature;
the thermoplastic elastomer material has the elasticity of rubber at normal temperature;
polyvinyl butyral is a product obtained by condensing polyvinyl alcohol and butyraldehyde under the catalysis of acid, and PVB molecules contain longer branched chains, so that the PVB has good flexibility, low vitrification temperature, very high tensile strength and impact strength, excellent transparency, good solubility, good light resistance, water resistance, heat resistance, cold resistance and film forming property;
step two: adding p-tert-butylphenol formaldehyde resin, chloropropane resin ethylene-propylene copolymer and high molecular organic wax into the mixture A, raising the temperature to 175-185 ℃, and shearing at a shearing rate of 3000-6000 r/min for 30-60 min to obtain a mixture B;
wherein, the p-tert-butylphenol formaldehyde resin is oil-soluble phenolic resin prepared by the polycondensation of formaldehyde and p-tert-butylphenol, and is one of pure phenolic resin;
the chloropropane resin ethylene-propylene copolymer has the properties of high impact resistance, toughening grade, weather resistance and aging resistance;
the high molecular organic wax can improve the construction workability of the asphalt mixture;
step three: adding an asphalt regeneration material into the mixture B at 175-185 ℃, and stirring and reacting for 150-360 min at a rotating speed of 100-250 r/min until the materials are uniform and have no particles, thereby obtaining the multifunctional thin-layer modifier;
the asphalt regeneration material is prepared by mixing low-density polyethylene, asphaltene and industrial waste engine oil, wherein the mass ratio of the low-density polyethylene to the asphaltene to the industrial waste engine oil is 1:1:8, and the molecular weight of the low-density polyethylene is 8000-12000;
the hydrocarbon extracted from waste materials of low-density polyethylene, asphaltene and industrial waste engine oil has the capability of adjusting the viscosity of old asphalt to achieve the viscosity required by the asphalt mixture, soften the old asphalt mixture which is too brittle and hard, fully disperse the old asphalt mixture under the action of machinery and heating so as to be uniformly mixed with new asphalt and new aggregate, and ensure that the cementing material has enough adhesiveness; meanwhile, the asphalt is infiltrated into the old mixture and fully mixed with the old asphalt, the asphalt which is agglomerated after aging is dissolved and dispersed again, and the asphalt colloid structure is adjusted, so that the aim of improving the rheological property of the asphalt is fulfilled.
Example 2
The embodiment of the embodiment is basically consistent with that of the embodiment 1, except that the multifunctional thin-layer modifier of the high-ductility and elastic ultrathin overlay asphalt mixture comprises the following components in parts by weight: 52 parts of thermoplastic elastomer materials, 25 parts of polyvinyl butyral, 2 parts of p-tert-butylphenol formaldehyde resin, 2 parts of chloropropyl resin ethylene-propylene copolymer, 5 parts of high molecular organic wax and 3 parts of asphalt regeneration materials.
Example 3
The embodiment of the embodiment is basically consistent with that of the embodiment 1, except that the multifunctional thin-layer modifier of the high-ductility and elastic ultrathin overlay asphalt mixture comprises the following components in parts by weight: 58 parts of thermoplastic elastomer material, 30 parts of polyvinyl butyral, 4 parts of p-tert-butylphenol formaldehyde resin, 4 parts of chloropropyl resin ethylene-propylene copolymer, 8 parts of high molecular organic wax and 5 parts of asphalt regeneration material.
Comparative example 1
The embodiment of the comparative example is basically consistent with that of the example 1, and the difference is that the multifunctional thin-layer modifier of the high-ductility and elastic ultrathin overlay asphalt mixture comprises the following components in parts by weight: 52 parts of polyolefin elastomer material, 25 parts of polyvinyl butyral, 2 parts of p-tert-butylphenol formaldehyde resin, 2 parts of chloropropyl resin ethylene-propylene copolymer, 5 parts of high molecular organic wax and 3 parts of asphalt regeneration material.
Comparative example 2
The embodiment of the comparative example is basically consistent with that of the example 1, and the difference is that the multifunctional thin-layer modifier of the high-ductility and elastic ultrathin overlay asphalt mixture comprises the following components in parts by weight: 52 parts of natural rubber material (NR), 25 parts of polyvinyl butyral, 2 parts of p-tert-butyl phenol formaldehyde resin, 2 parts of chloropropane resin ethylene-propylene copolymer and 5 parts of high molecular organic wax.
The results are as follows:
the asphalt mixture consists of common asphalt, coarse aggregate, fine aggregate and mineral powder, and meets the relevant regulation of CJJ1-2008 of urban road engineering construction and quality acceptance Specifications;
adding the multi-effect thin-layer modifier in the embodiment 1 into the asphalt mixture, and fully mixing to obtain an asphalt mixture finished product, wherein the multi-effect thin-layer modifier is 6.0% -9.0% of the dosage of the asphalt mixture, the specific addition amount is determined according to the index requirements of table 1, and the asphalt mixture gradation generally meets the requirements of table 2:
TABLE 1 modifier index requirements
TABLE 2 grading requirements
In conclusion, the asphalt mixture compounded by the multifunctional thin-layer modifier can greatly improve the self-bonding capability of the mixture and is not easy to disperse and peel off; meanwhile, the high-temperature performance, the adhesion performance and the water damage resistance performance, especially the fatigue resistance performance, of the asphalt mixture are obviously improved, so that the pavement performance and the durability of the ultrathin overlay asphalt mixture are obviously improved.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (7)
1. The multifunctional thin-layer modifier for the high-ductility ultrathin overlay asphalt mixture is characterized by being prepared by the following steps:
the method comprises the following steps: heating a thermoplastic elastomer material to 155-165 ℃, adding polyvinyl butyral, and uniformly stirring to obtain a mixture A;
step two: adding p-tert-butylphenol formaldehyde resin, chloropropane resin ethylene-propylene copolymer and high molecular organic wax into the mixture A, simultaneously heating to 175-185 ℃, and shearing to obtain a mixture B;
step three: and adding an asphalt regeneration material into the mixture B at 175-185 ℃, and stirring and reacting for 150-360 min at a rotating speed of 100-250 r/min until the materials are uniform and have no particles, thus obtaining the multifunctional thin-layer modifier.
2. The multifunctional thin-layer modifier for the high-ductility and ultrathin overlay asphalt mixture as claimed in claim 1, wherein the thermoplastic elastomer material is a block copolymer composed of a high-melting-point crystalline polyamide hard segment and a non-crystalline polyether or polyester soft segment.
3. The multifunctional thin-layer modifier for the high-ductility and ultra-thin overlay asphalt mixture according to claim 1, wherein in the first step, the stirring speed is 200-400 r/min, and the stirring time is 20-60 min.
4. The multifunctional thin-layer modifier for the high-ductility and ultrathin overlay asphalt mixture is characterized in that the shearing and stirring speed in the second step is 3000-6000 r/min, and the shearing time is 30-60 min.
5. The multifunctional thin-layer modifier for the high-ductility and elasticity ultrathin overlay asphalt mixture is characterized in that the asphalt regeneration material is prepared by mixing low-density polyethylene, asphaltene and industrial waste engine oil according to the mass ratio of 1:1: 8;
wherein the low density polyethylene has a molecular weight of 8000 to 12000.
6. The multifunctional thin-layer modifier for the high-ductility and ultra-thin overlay asphalt mixture according to any one of claims 1 to 5, characterized in that the multifunctional thin-layer modifier comprises the following components in parts by weight: 52-58 parts of thermoplastic elastomer material, 25-30 parts of polyvinyl butyral, 2-4 parts of p-tert-butylphenol formaldehyde resin, 2-4 parts of chloropropyl resin ethylene-propylene copolymer, 5-8 parts of high molecular organic wax and 3-5 parts of asphalt regeneration material.
7. The multifunctional thin-layer modifier for the high-ductility and elasticity ultrathin overlay asphalt mixture is characterized in that the multifunctional thin-layer modifier is added into the asphalt mixture and fully mixed to obtain an asphalt mixture finished product, and the multifunctional thin-layer modifier accounts for 6.0-9.0% of the dosage of the asphalt mixture.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210015692.1A CN114163811A (en) | 2022-01-07 | 2022-01-07 | Multifunctional thin-layer modifier for high-ductility ultrathin overlay asphalt mixture |
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| CN202210015692.1A CN114163811A (en) | 2022-01-07 | 2022-01-07 | Multifunctional thin-layer modifier for high-ductility ultrathin overlay asphalt mixture |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107337381A (en) * | 2017-08-09 | 2017-11-10 | 上海市市政规划设计研究院 | Small particle open gradation asphalt for ultrathin overlay |
| CN107880576A (en) * | 2017-12-20 | 2018-04-06 | 中公高科养护科技股份有限公司 | A kind of modifying agent, preparation method and applications |
| CN111748211A (en) * | 2020-08-06 | 2020-10-09 | 上海缤德新材料科技有限公司 | Self-adhesive modified asphalt and preparation method thereof |
| CN111825994A (en) * | 2020-08-06 | 2020-10-27 | 上海缤德新材料科技有限公司 | High-ductility high-elasticity modified asphalt composition and preparation method thereof |
| CN111978751A (en) * | 2020-09-09 | 2020-11-24 | 重庆市智翔铺道技术工程有限公司 | Ultrahigh-viscosity modified asphalt and preparation method thereof |
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- 2022-01-07 CN CN202210015692.1A patent/CN114163811A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107337381A (en) * | 2017-08-09 | 2017-11-10 | 上海市市政规划设计研究院 | Small particle open gradation asphalt for ultrathin overlay |
| CN107880576A (en) * | 2017-12-20 | 2018-04-06 | 中公高科养护科技股份有限公司 | A kind of modifying agent, preparation method and applications |
| CN111748211A (en) * | 2020-08-06 | 2020-10-09 | 上海缤德新材料科技有限公司 | Self-adhesive modified asphalt and preparation method thereof |
| CN111825994A (en) * | 2020-08-06 | 2020-10-27 | 上海缤德新材料科技有限公司 | High-ductility high-elasticity modified asphalt composition and preparation method thereof |
| CN111978751A (en) * | 2020-09-09 | 2020-11-24 | 重庆市智翔铺道技术工程有限公司 | Ultrahigh-viscosity modified asphalt and preparation method thereof |
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