CN112920612A - High modulus asphalt additive and preparation process thereof - Google Patents
High modulus asphalt additive and preparation process thereof Download PDFInfo
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- CN112920612A CN112920612A CN202110098277.2A CN202110098277A CN112920612A CN 112920612 A CN112920612 A CN 112920612A CN 202110098277 A CN202110098277 A CN 202110098277A CN 112920612 A CN112920612 A CN 112920612A
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- modulus asphalt
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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
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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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
Abstract
The invention discloses a high modulus asphalt additive, which comprises the following raw materials in parts by weight: 40-45 parts of polyethylene powder, 5-10 parts of polypropylene powder, 40-45 parts of desulfurized rubber powder, 5-10 parts of polyurethane powder, 6-10 parts of stabilizer and 3-6 parts of modifier. Due to the addition of polyethylene and polypropylene, the high-modulus asphalt additive can be conveniently reduced in the using process, the limitation of storage time is eliminated, the mixing load is reduced, and the aging is slowed down; due to the addition of the desulfurized rubber and the polyurethane, when the additive is added into the asphalt, the dynamic modulus of the asphalt mixture can be obviously improved, and the high-temperature stability and the water stability of the asphalt mixture are improved; in addition, the addition of the stabilizer can ensure the stability of the high-modulus asphalt additive and delay aging; due to the addition of the modifier, when the high-modulus asphalt additive is used in an asphalt material, the interaction force between asphalt mixtures can be enhanced, and the mixture structure is firmer.
Description
Technical Field
The invention relates to the field of application of road construction materials, in particular to a high-modulus asphalt additive and a preparation process thereof.
Background
For a flexible pavement structure, the bearing capacity is relatively insufficient, the additive for reducing the thickness of a pavement and reducing the construction cost is called as a high modulus agent in order to improve the modulus parameter of an asphalt mixture, the asphalt concrete added with the high modulus agent is called as high modulus asphalt concrete, and the high modulus asphalt concrete realizes the purposes of improving the stiffness modulus and the fatigue resistance through the characteristics of hard cementing materials, high cementing material consumption, low void ratio and the like.
The high modulus agent is divided into polyolefine and natural asphalt according to the material types, and the natural asphalt high modulus agent has the advantages of large doping amount, limited storage time, large mixing thermal load, no energy-saving asphalt, severe aging, incomplete modification effect and weak low-temperature and water loss resistance.
In addition, for the middle and upper layers of roads, the polyolefin high modulus agent in the prior art is less in mixing amount, and excellent in high-temperature stability and dynamic modulus performance, but the defects of insufficient fatigue property, low-temperature property and water stability still exist.
Disclosure of Invention
The invention aims to provide a high-modulus asphalt additive and a preparation process thereof, wherein the additive is used for the middle and upper layers of a road, can obviously improve the dynamic modulus and the fatigue property of an asphalt mixture, and improves the low-temperature property and the water stability of the asphalt mixture.
In order to solve the technical problem, the scheme of the invention is as follows:
a high modulus asphalt additive comprises the following raw materials in parts by weight: 40-45 parts of polyethylene powder, 5-10 parts of polypropylene powder, 40-45 parts of desulfurized rubber powder, 5-10 parts of polyurethane powder, 6-10 parts of stabilizer and 3-6 parts of modifier.
The material comprises the following raw materials in parts by weight: 42-43 parts of polyethylene powder, 7-8 parts of polypropylene powder, 42-43 parts of desulfurized rubber, 7-8 parts of polyurethane powder, 7-9 parts of stabilizer and 4-5 parts of modifier.
The material comprises the following raw materials in parts by weight: 42.5 parts of polyethylene powder, 7.5 parts of polypropylene powder, 42.5 parts of desulfurized rubber, 7.5 parts of polyurethane powder, 8 parts of stabilizer and 4.5 parts of modifier.
The stabilizer is one or a mixture of more of stearic acid, zinc oxide and fluorine-containing surfactant.
The modifier is prepared from the following raw materials in parts by weight: 2-8 parts of compatilizer, 1-7 parts of cross-linking agent and 3-7 parts of activating agent.
The compatilizer is one or a mixture of more of a cyclic anhydride compatilizer, a carboxylic acid compatilizer and an isocyanate compatilizer.
The cross-linking agent is selected from one or a mixture of more of dicumyl peroxide and alkylphenol formaldehyde resin.
The activating agent is one or a mixture of stearic acid, zinc oxide and fluorine-containing surfactant.
A preparation process of a high modulus asphalt additive comprises the following steps:
1): selecting and respectively crushing defective tires, polyethylene, polypropylene and polyurethane materials produced in factories to obtain rubber powder, polyethylene powder, polypropylene powder and polyurethane powder;
2): taking the rubber powder obtained in the step 1), and performing high-temperature desulfurization treatment to obtain desulfurized rubber;
3): polyethylene powder, polypropylene powder, polyurethane powder, desulfurized rubber, a stabilizer and a modifier are selected according to the weight parts, added into mixing equipment and mixed uniformly in a hot mixing manner, and the high-modulus asphalt additive is obtained.
The temperature of the high-temperature desulfurization treatment in the step 2) is 180-220 ℃, and the temperature of the hot-mixing in the step 3) is 120-160 ℃.
Compared with the prior art, the invention has the beneficial effects that:
in the application, due to the addition of polyethylene and polypropylene, the high-modulus asphalt additive can reduce the mixing amount in the use process, eliminate the limitation of storage time, reduce the mixing load and slow down the aging; due to the addition of the desulfurized rubber and the polyurethane, when the high-modulus asphalt additive is added into asphalt, the dynamic modulus of the asphalt mixture can be obviously improved, and the high-temperature stability and the water stability of the asphalt mixture are improved; in addition, the addition of the stabilizer can ensure the stability of the high-modulus asphalt additive and delay aging; due to the addition of the modifier, when the high-modulus asphalt additive is used in an asphalt material, the interaction force between asphalt mixtures can be enhanced, and the mixture structure is firmer. Moreover, the high-modulus asphalt additive has more comprehensive modification effect; the method is low-carbon, energy-saving and convenient for environmental protection, and greatly delays the generation of permanent deformation of the asphalt pavement.
Detailed Description
The following further describes the embodiments of the present invention. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1 a high modulus asphalt additive comprising the following raw materials in parts by weight: 40 parts of polyethylene powder, 10 parts of polypropylene powder, 45 parts of desulfurized rubber powder, 10 parts of polyurethane powder, 10 parts of stabilizer and 6 parts of modifier.
The stabilizer is one or a mixture of more of stearic acid, zinc oxide and fluorine-containing surfactant.
The modifier is prepared from the following raw materials in parts by weight: 2-8 parts of compatilizer, 1-7 parts of cross-linking agent and 3-7 parts of activating agent.
The compatilizer is one or a mixture of more of a cyclic anhydride compatilizer, a carboxylic acid compatilizer and an isocyanate compatilizer.
The cross-linking agent is selected from one or a mixture of more of dicumyl peroxide and alkylphenol formaldehyde resin.
The activating agent is one or a mixture of stearic acid, zinc oxide and fluorine-containing surfactant.
Example 2 a high modulus asphalt additive comprising the following raw materials in parts by weight: 45 parts of polyethylene powder, 5 parts of polypropylene powder, 40 parts of desulfurized rubber powder, 5 parts of polyurethane powder, 6 parts of stabilizer and 3 parts of modifier.
The stabilizer is one or a mixture of more of stearic acid, zinc oxide and fluorine-containing surfactant.
The modifier is prepared from the following raw materials in parts by weight: 2-8 parts of compatilizer, 1-7 parts of cross-linking agent and 3-7 parts of activating agent.
The compatilizer is one or a mixture of more of a cyclic anhydride compatilizer, a carboxylic acid compatilizer and an isocyanate compatilizer.
The cross-linking agent is selected from one or a mixture of more of dicumyl peroxide and alkylphenol formaldehyde resin.
The activating agent is one or a mixture of stearic acid, zinc oxide and fluorine-containing surfactant.
Example 3 a high modulus asphalt additive comprising the following raw materials in parts by weight: 42 parts of polyethylene powder, 8 parts of polypropylene powder, 43 parts of desulfurized rubber, 8 parts of polyurethane powder, 9 parts of stabilizer and 5 parts of modifier.
The stabilizer is one or a mixture of more of stearic acid, zinc oxide and fluorine-containing surfactant.
The modifier is prepared from the following raw materials in parts by weight: 2-8 parts of compatilizer, 1-7 parts of cross-linking agent and 3-7 parts of activating agent.
The compatilizer is one or a mixture of more of a cyclic anhydride compatilizer, a carboxylic acid compatilizer and an isocyanate compatilizer.
The cross-linking agent is selected from one or a mixture of more of dicumyl peroxide and alkylphenol formaldehyde resin.
The activating agent is one or a mixture of stearic acid, zinc oxide and fluorine-containing surfactant.
Example 4 a high modulus asphalt additive comprising the following raw materials in parts by weight: 43 parts of polyethylene powder, 7 parts of polypropylene powder, 42 parts of desulfurized rubber, 7 parts of polyurethane powder, 7 parts of stabilizer and 4 parts of modifier.
The stabilizer is one or a mixture of more of stearic acid, zinc oxide and fluorine-containing surfactant.
The modifier is prepared from the following raw materials in parts by weight: 2-8 parts of compatilizer, 1-7 parts of cross-linking agent and 3-7 parts of activating agent.
The compatilizer is one or a mixture of more of a cyclic anhydride compatilizer, a carboxylic acid compatilizer and an isocyanate compatilizer.
The cross-linking agent is selected from one or a mixture of more of dicumyl peroxide and alkylphenol formaldehyde resin.
The activating agent is one or a mixture of stearic acid, zinc oxide and fluorine-containing surfactant.
Example 5 a high modulus asphalt additive comprising the following raw materials in parts by weight: 42.5 parts of polyethylene powder, 7.5 parts of polypropylene powder, 42.5 parts of desulfurized rubber, 7.5 parts of polyurethane powder, 8 parts of stabilizer and 4.5 parts of modifier.
The stabilizer is one or a mixture of more of stearic acid, zinc oxide and fluorine-containing surfactant.
The modifier is prepared from the following raw materials in parts by weight: 2-8 parts of compatilizer, 1-7 parts of cross-linking agent and 3-7 parts of activating agent.
The compatilizer is one or a mixture of more of a cyclic anhydride compatilizer, a carboxylic acid compatilizer and an isocyanate compatilizer.
The cross-linking agent is selected from one or a mixture of more of dicumyl peroxide and alkylphenol formaldehyde resin.
The activating agent is one or a mixture of stearic acid, zinc oxide and fluorine-containing surfactant.
In the embodiment, due to the addition of polyethylene and polypropylene, the high-modulus asphalt additive can reduce the mixing amount in the use process, eliminate the limitation of storage time, reduce the mixing load and slow down the aging; due to the addition of the desulfurized rubber and the polyurethane, when the high-modulus asphalt additive is added into asphalt, the dynamic modulus of the asphalt mixture can be obviously improved, and the high-temperature stability (anti-rutting capability) and the water stability of the asphalt mixture are improved; in addition, the addition of the stabilizer can ensure the stability of the high-modulus asphalt additive and delay aging; due to the addition of the modifier, when the high-modulus asphalt additive is used in an asphalt material, the interaction force between asphalt mixtures can be enhanced, and the mixture structure is firmer.
In the application, the compatilizer can promote the incompatible two polymers to have better compatibility, so that the stable auxiliary agent of the blend is achieved, and the modified asphalt is prevented from generating segregation phenomenon.
The cross-linking agent can enable 2 or more molecules to be respectively coupled, so that the molecules are combined together, and the firmness and the strength of the modified asphalt are ensured.
The activating agent has the function of generating a film promoting the effect of the collecting agent on the surface of the mineral, so that the activity of the modified asphalt is promoted, and the normal cementation of the modified asphalt is ensured.
A preparation process of a high modulus asphalt additive comprises the following steps:
1): selecting and respectively crushing defective tires, polyethylene, polypropylene and polyurethane materials produced in factories to obtain rubber powder, polyethylene powder, polypropylene powder and polyurethane powder;
2): taking the rubber powder obtained in the step 1), and performing high-temperature desulfurization treatment to obtain desulfurized rubber;
3): polyethylene powder, polypropylene powder, polyurethane powder, desulfurized rubber, a stabilizer and a modifier are selected according to the weight parts, added into mixing equipment and mixed uniformly in a hot mixing manner, and the high-modulus asphalt additive is obtained.
The temperature of the high-temperature desulfurization treatment in the step 2) is 180-220 ℃, and the temperature of the hot-mixing in the step 3) is 120-160 ℃.
In contrast to conventional hard asphalt particles, the high modulus asphalt additive prepared according to the preparation method of the present invention using the weight ratio of the present invention in asphalt is used as shown in table 1:
table 1 comparison of hard asphalt particles and high modulus asphalt additives
As can be seen from the table 1, the high modulus asphalt additive has the advantages of less mixing amount, long storage time, small mixing load, slow aging and more comprehensive modification effect when in use; the anti-rutting agent has stronger anti-rutting capability, is low-carbon, energy-saving and convenient for environmental protection, and greatly delays the generation of permanent deformation of the asphalt pavement.
The high-modulus asphalt additive is suitable for roads which have large traffic volume and are easy to generate ruts under heavy load and limit the thickness of asphalt layers due to construction funds, elevation and the like; the method is suitable for mountain areas, hilly areas, long steep slope roads; the method is suitable for heavy traffic roads in high-temperature areas in summer; the method is suitable for expressways, urban main road crossroads, airport runways and the like.
When the high-modulus asphalt additive is used, the use proportion of the high-modulus additive is determined according to a test, 180-DEG C aggregate at 190 ℃ is added into a mixing pot, the high-modulus additive is put into the mixing pot for dry mixing for 10-15 seconds, the high-modulus additive and the aggregate are fully mixed, then asphalt is added according to the oil-stone ratio and is mixed for 40-45 seconds, and the high-modulus asphalt mixture is obtained and can be normally used. In this application, should recommend the accurate measurement of use equipment to put in.
The embodiments of the present invention have been described in detail, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.
Claims (10)
1. A high modulus asphalt additive characterized by: the material comprises the following raw materials in parts by weight: 40-45 parts of polyethylene powder, 5-10 parts of polypropylene powder, 40-45 parts of desulfurized rubber powder, 5-10 parts of polyurethane powder, 6-10 parts of stabilizer and 3-6 parts of modifier.
2. The high modulus asphalt additive of claim 1, wherein: the material comprises the following raw materials in parts by weight: 42-43 parts of polyethylene powder, 7-8 parts of polypropylene powder, 42-43 parts of desulfurized rubber, 7-8 parts of polyurethane powder, 7-9 parts of stabilizer and 4-5 parts of modifier.
3. The high modulus asphalt additive of claim 2, wherein: the material comprises the following raw materials in parts by weight: 42.5 parts of polyethylene powder, 7.5 parts of polypropylene powder, 42.5 parts of desulfurized rubber, 7.5 parts of polyurethane powder, 8 parts of stabilizer and 4.5 parts of modifier.
4. The high modulus asphalt additive of claim 3, wherein: the stabilizer is one or a mixture of more of stearic acid, zinc oxide and fluorine-containing surfactant.
5. The high modulus asphalt additive of claim 3, wherein: the modifier is prepared from the following raw materials in parts by weight: 2-8 parts of compatilizer, 1-7 parts of cross-linking agent and 3-7 parts of activating agent.
6. The high modulus asphalt additive of claim 5, wherein: the compatilizer is one or a mixture of more of a cyclic anhydride compatilizer, a carboxylic acid compatilizer and an isocyanate compatilizer.
7. The high modulus asphalt additive of claim 5, wherein: the cross-linking agent is selected from one or a mixture of more of dicumyl peroxide and alkylphenol formaldehyde resin.
8. The high modulus asphalt additive of claim 5, wherein: the activating agent is one or a mixture of stearic acid, zinc oxide and fluorine-containing surfactant.
9. The process for the preparation of a high modulus asphalt additive according to any of claims 1-8, characterized in that: the method comprises the following steps:
1): selecting and respectively crushing defective tires, polyethylene, polypropylene and polyurethane materials produced in factories to obtain rubber powder, polyethylene powder, polypropylene powder and polyurethane powder;
2): taking the rubber powder obtained in the step 1), and performing high-temperature desulfurization treatment to obtain desulfurized rubber;
3): polyethylene powder, polypropylene powder, polyurethane powder, desulfurized rubber, a stabilizer and a modifier are selected according to the weight parts, added into mixing equipment and mixed uniformly in a hot mixing manner, and the high-modulus asphalt additive is obtained.
10. The process of preparing a high modulus asphalt additive according to claim 9, wherein: the temperature of the high-temperature desulfurization treatment in the step 2) is 180-220 ℃, and the temperature of the hot-mixing in the step 3) is 120-160 ℃.
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Citations (5)
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|---|---|---|---|---|
| CN101906224A (en) * | 2009-06-03 | 2010-12-08 | 深圳市海川实业股份有限公司 | Anti-rutting asphalt modifier, preparation method thereof, modified asphalt and application thereof |
| CN103773006A (en) * | 2012-10-17 | 2014-05-07 | 上海市政工程设计研究总院（集团）有限公司 | High-modulus bituminous mixture additive and preparation method thereof |
| CN106189290A (en) * | 2016-07-12 | 2016-12-07 | 同济大学 | Modified asphalt material, its preparation method and application for airport pavement |
| CN106519718A (en) * | 2016-11-11 | 2017-03-22 | 天津城建大学 | High-modulus asphalt additive |
| CN109233313A (en) * | 2018-09-26 | 2019-01-18 | 上海仁聚新材料科技有限公司 | A kind of high-modulus asphalt modifying agent, high-modulus composite modified asphalt, asphalt and preparation method thereof |
-
2021
- 2021-01-25 CN CN202110098277.2A patent/CN112920612A/en active Pending
Patent Citations (5)
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| CN101906224A (en) * | 2009-06-03 | 2010-12-08 | 深圳市海川实业股份有限公司 | Anti-rutting asphalt modifier, preparation method thereof, modified asphalt and application thereof |
| CN103773006A (en) * | 2012-10-17 | 2014-05-07 | 上海市政工程设计研究总院（集团）有限公司 | High-modulus bituminous mixture additive and preparation method thereof |
| CN106189290A (en) * | 2016-07-12 | 2016-12-07 | 同济大学 | Modified asphalt material, its preparation method and application for airport pavement |
| CN106519718A (en) * | 2016-11-11 | 2017-03-22 | 天津城建大学 | High-modulus asphalt additive |
| CN109233313A (en) * | 2018-09-26 | 2019-01-18 | 上海仁聚新材料科技有限公司 | A kind of high-modulus asphalt modifying agent, high-modulus composite modified asphalt, asphalt and preparation method thereof |
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Application publication date: 20210608 |