CN111548055A - Composite modified asphalt mixture and preparation method thereof - Google Patents
Composite modified asphalt mixture and preparation method thereof Download PDFInfo
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- CN111548055A CN111548055A CN201910109621.6A CN201910109621A CN111548055A CN 111548055 A CN111548055 A CN 111548055A CN 201910109621 A CN201910109621 A CN 201910109621A CN 111548055 A CN111548055 A CN 111548055A
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- Prior art keywords
- modified asphalt
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- stone
- asphalt mixture
- reducing agent
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to the technical field of modified asphalt, in particular to a composite modified asphalt mixture and a preparation method thereof. The mixture comprises the following components in parts by mass: 5-10 parts of modified asphalt, 1.5-5 parts of water-soluble polymer sodium carboxymethylcellulose, 1-5 parts of stabilizer, 1-5 parts of curing agent, 1-5 parts of shrinkage reducing agent and 100 parts of stone material. The composite modified asphalt mixture and the preparation method thereof have stable product structure and can greatly improve the segregation problem of the mixed modified asphalt and stone in the prior art.
Description
Technical Field
The invention relates to the technical field of modified asphalt, in particular to a composite modified asphalt mixture and a preparation method thereof.
Background
The modified asphalt is an asphalt binder prepared by adding external additives (modifiers) such as rubber, resin, high molecular polymer, ground rubber powder or other fillers or by adopting measures such as mild oxidation processing of the asphalt and the like, so that the performance of the asphalt or the asphalt mixture is improved.
The modified asphalt has two mechanisms, namely, the chemical composition of the asphalt is changed, and the modifier is uniformly distributed in the asphalt to form a certain space network structure.
The main advantage of the finished modified asphalt is that it is very convenient to use, and compared with the common asphalt, the temperature control needs to be improved, and the rest is not different. However, the disadvantage of the finished modified asphalt is that the user is not aware of the variety and dosage of the base asphalt and the modifier, and especially the problem of segregation of the finished modified asphalt is a considerable risk. Users and modified asphalt manufacturers often dispute quality problems for years, and basically all are segregation problems.
In the prior art, the reasons for the problem of modified asphalt segregation are generally as follows: the storage tank is too high in temperature, too long in time, incapable of stirring and recycling, unreasonable in added variety and quantity of the stabilizer or free of the stabilizer, and the most important is that whether the particle size of SBS (such as a modifier) is cut (or ground) is small enough and the smaller the particle size is, the more stable the SBS (such as the modifier) is. In general, modified asphalt is not easily stored for a long time.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a composite modified asphalt mixture and a preparation method thereof, wherein the product structure is stable, and the problem of separation of the mixed modified asphalt and stone in the prior art can be greatly improved.
The technical scheme adopted by the invention is as follows:
a composite modified asphalt mixture comprises the following components in parts by mass:
5-10 parts of modified asphalt, 1.5-5 parts of water-soluble polymer sodium carboxymethylcellulose, 1-5 parts of stabilizer, 1-5 parts of curing agent, 1-5 parts of shrinkage reducing agent and 100 parts of stone material.
The modified asphalt is natural rubber modified asphalt, SBS modified asphalt, styrene butadiene rubber modified asphalt, chloroprene rubber modified asphalt, butadiene rubber modified asphalt or butyl rubber modified asphalt.
The stabilizer is polyvinyl alcohol or cellulose.
The curing agent is an epoxy asphalt curing agent.
The shrinkage reducing agent is a polycarboxylic acid water reducing agent.
A preparation method of a composite modified asphalt mixture comprises the following steps:
A. stone surface treatment: soaking stone in water solution containing water soluble polymer sodium carboxymethyl cellulose for 24 hr and taking out;
B. heating the modified asphalt to 180 ℃ and 200 ℃, shearing the modified asphalt for 1 hour at the speed of 5000r/min by using a shearing machine, and then standing the modified asphalt for 1 hour at the temperature of 160 ℃;
C. and C, mixing the stone obtained in the step A and the modified asphalt obtained in the step B by using a stirrer, adding a curing agent, a shrinkage reducing agent and a stabilizing agent, and stirring at the temperature of 180 ℃ for 1 minute to obtain a final product.
The technical scheme provided by the invention has the beneficial effects that:
according to the invention, stone is subjected to surface treatment, the stone is soaked in the water solution containing water-soluble polymer sodium carboxymethyl cellulose, so that the surface of the stone is increased in viscosity, and further, when the stone is mixed with modified asphalt to obtain a modified asphalt mixture, the structural stability of the modified asphalt is increased, so that the problem of segregation of the modified asphalt in the prior art is solved, and a more stable modified asphalt mixture is obtained.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following detailed description is further provided in conjunction with the embodiments.
Example one
A composite modified asphalt mixture comprises 5 kg of modified asphalt, 1.5 kg of water-soluble polymer sodium carboxymethyl cellulose, 1 kg of stabilizing agent, 1 kg of curing agent, 1 kg of shrinkage reducing agent and 100 kg of stone material.
The modified asphalt in this example is natural rubber modified asphalt, SBS modified asphalt, styrene butadiene rubber modified asphalt, chloroprene rubber modified asphalt, butadiene rubber modified asphalt, or butyl rubber modified asphalt.
The stabilizer is polyvinyl alcohol or cellulose.
The curing agent is an epoxy asphalt curing agent.
The shrinkage reducing agent is a polycarboxylic acid water reducing agent.
Example two
The difference from the first embodiment is that the compound modified asphalt mixture of the first embodiment includes 10 kg of modified asphalt, 5 kg of water-soluble polymer sodium carboxymethyl cellulose, 5 kg of stabilizing agent, 5 kg of curing agent, 5 kg of shrinkage reducing agent and 200 kg of stone material.
EXAMPLE III
The difference from the first embodiment is that a compound modified asphalt mixture comprises 7 kg of modified asphalt, 3 kg of water-soluble high-molecular sodium carboxymethyl cellulose, 3 kg of stabilizing agent, 3 kg of curing agent, 3 kg of shrinkage reducing agent and 150 kg of stone material.
Example four
A preparation method of a composite modified asphalt mixture comprises the following steps:
A. stone surface treatment: soaking stone in water solution containing water soluble polymer sodium carboxymethyl cellulose for 24 hr and taking out;
B. heating the modified asphalt to 180 ℃ and 200 ℃, shearing the modified asphalt for 1 hour at the speed of 5000r/min by using a shearing machine, and then standing the modified asphalt for 1 hour at the temperature of 160 ℃;
C. and C, mixing the stone obtained in the step A and the modified asphalt obtained in the step B by using a stirrer, adding a curing agent, a shrinkage reducing agent and a stabilizing agent, and stirring at the temperature of 180 ℃ for 1 minute to obtain a final product.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A composite modified asphalt mixture comprises the following components in parts by mass:
5-10 parts of modified asphalt, 1.5-5 parts of water-soluble polymer sodium carboxymethylcellulose, 1-5 parts of stabilizer, 1-5 parts of curing agent, 1-5 parts of shrinkage reducing agent and 100 parts of stone material.
2. The compound modified asphalt mixture as claimed in claim 1, wherein the modified asphalt is natural rubber modified asphalt, SBS modified asphalt, styrene-butadiene rubber modified asphalt, chloroprene rubber modified asphalt, butadiene rubber modified asphalt or butyl rubber modified asphalt.
3. The composite modified asphalt mixture as claimed in claim 1, wherein the stabilizer is polyvinyl alcohol or cellulose.
4. The composite modified asphalt mixture as claimed in claim 1, wherein the curing agent is an epoxy asphalt curing agent.
5. The compound modified asphalt mixture as claimed in claim 1, wherein the shrinkage reducing agent is a polycarboxylic acid water reducing agent.
6. A preparation method of a composite modified asphalt mixture comprises the following steps:
A. stone surface treatment: soaking stone in water solution containing water soluble polymer sodium carboxymethyl cellulose for 24 hr and taking out;
B. heating the modified asphalt to 180 ℃ and 200 ℃, shearing the modified asphalt for 1 hour at the speed of 5000r/min by using a shearing machine, and then standing the modified asphalt for 1 hour at the temperature of 160 ℃;
C. and C, mixing the stone obtained in the step A and the modified asphalt obtained in the step B by using a stirrer, adding a curing agent, a shrinkage reducing agent and a stabilizing agent, and stirring at the temperature of 180 ℃ for 1 minute to obtain a final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910109621.6A CN111548055A (en) | 2019-02-11 | 2019-02-11 | Composite modified asphalt mixture and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910109621.6A CN111548055A (en) | 2019-02-11 | 2019-02-11 | Composite modified asphalt mixture and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111548055A true CN111548055A (en) | 2020-08-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910109621.6A Pending CN111548055A (en) | 2019-02-11 | 2019-02-11 | Composite modified asphalt mixture and preparation method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN111548055A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109265075A (en) * | 2018-07-27 | 2019-01-25 | 交通运输部公路科学研究所 | A kind of water resistant damage composite modified asphalt mixture and preparation method thereof |
-
2019
- 2019-02-11 CN CN201910109621.6A patent/CN111548055A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109265075A (en) * | 2018-07-27 | 2019-01-25 | 交通运输部公路科学研究所 | A kind of water resistant damage composite modified asphalt mixture and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 刘尚乐: "《乳化沥青及其在道路、建筑工程中的应用》", 31 July 2008, 中国建材工业出版社 * |
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Application publication date: 20200818 |