CN110982287A - Nano modified asphalt and preparation method thereof - Google Patents
Nano modified asphalt and preparation method thereof Download PDFInfo
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- CN110982287A CN110982287A CN201911294735.9A CN201911294735A CN110982287A CN 110982287 A CN110982287 A CN 110982287A CN 201911294735 A CN201911294735 A CN 201911294735A CN 110982287 A CN110982287 A CN 110982287A
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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
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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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
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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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
- C08L2555/00—Characteristics of bituminous mixtures
- C08L2555/40—Mixtures based upon bitumen or asphalt containing functional additives
- C08L2555/50—Inorganic non-macromolecular ingredients
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Abstract
The invention belongs to the technical field of building materials, and particularly relates to a preparation method of nano modified asphalt and the nano modified asphalt prepared by the same. The nano modified asphalt is prepared from asphalt, nano calcium carbonate, nano calcium sulfate, nano silicon dioxide, rubber powder, a heat stabilizer and an anti-aging agent, wherein the asphalt is heated firstly, then the rubber powder and other components with the formula amount are added, and the mixture is input into a high-speed shearing homogenizing mill with oil-soluble heat preservation for preparation. The modified asphalt prepared by the invention has the advantages of good low temperature resistance, good high temperature resistance, high rigidity and flexibility, good stability, low cost, simplicity and stability, and can be applied in a large scale.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a preparation method of nano modified asphalt and the nano modified asphalt prepared by the same.
Background
The asphalt is a black-brown complex mixture composed of hydrocarbons with different molecular weights and nonmetal derivatives thereof, is one of high-viscosity organic liquids, is in a liquid state, has a black surface, and is soluble in carbon disulfide. Asphalt is a waterproof, moistureproof and anticorrosive organic cementing material. In the process of road construction, the modified asphalt is generally used, wherein the most common is SBS modified asphalt, but research shows that: the polymer modified asphalt such as SBS can better improve the high temperature resistance of the asphalt, has the defects of limited improvement degree of the low temperature resistance of the asphalt and the asphalt pavement, larger energy consumption of SBS shearing equipment and the like, and needs to be continuously heated and stirred in the aspects of transportation and storage to prevent the delamination and segregation of the modifier and the asphalt. The existing SBS modified asphalt has the disadvantages of poor low temperature resistance and high temperature resistance, insufficient toughness, insufficient stability and high manufacturing cost. These disadvantages limit the use of current modified asphalts to some extent. Accordingly, the present invention proposes a novel method for preparing modified asphalt to overcome the above disadvantages.
Disclosure of Invention
In view of the above, the invention provides a preparation method of nano modified asphalt and nano modified asphalt prepared by the same, wherein the preparation method is simple, and the prepared nano modified asphalt has good low temperature resistance, good high temperature resistance, large rigidity and flexibility, good stability and low cost.
In order to achieve the purpose, the invention adopts the following scheme:
the nano modified asphalt is prepared from the following components in parts by weight: 70-90 parts of asphalt, 10-40 parts of nano calcium carbonate, 10-40 parts of nano calcium sulfate, 10-40 parts of nano silicon dioxide, 5-10 parts of rubber powder, 5-10 parts of a heat stabilizer and 5-10 parts of an anti-aging agent, wherein the heat stabilizer is polyhydric alcohol, and the anti-aging agent is an antioxidant and a fluorine-containing cement base; the preparation method comprises the following steps:
1) heating the asphalt with the formula ratio to 200-300 ℃, adding the rubber powder, and uniformly stirring;
2) keeping the temperature of the asphalt constant at 200-300 ℃, and then adding the nano calcium carbonate, the nano calcium sulfate, the nano silicon dioxide and the surfactant according to the formula ratio and uniformly stirring;
3) and finally, adding a heat stabilizer and an anti-aging agent in a formula amount, inputting the mixture into a high-speed shearing homogenizing mill with oil-soluble heat preservation, and further dispersing and mixing at 200-300 ℃ to obtain the nano modified asphalt.
Compared with other modified materials, the nano material has better interface effect, and the nano particle has stronger active atoms on the surface and is easy to combine with other atoms to stabilize the atoms, namely, the nano particle is activated.
Further, the nano modified asphalt is prepared from the following components in parts by weight: 70 parts of asphalt, 40 parts of nano calcium carbonate, 40 parts of nano calcium sulfate, 40 parts of nano silicon dioxide, 5 parts of rubber powder, 5 parts of heat stabilizer and 5 parts of anti-aging agent.
Further, the nano modified asphalt is prepared from the following components in parts by weight: 80 parts of asphalt, 30 parts of nano calcium carbonate, 30 parts of nano calcium sulfate, 20 parts of nano silicon dioxide, 7 parts of rubber powder, 7 parts of heat stabilizer and 7 parts of anti-aging agent.
Further, the nano modified asphalt is prepared from the following components in parts by weight: 90 parts of asphalt, 10 parts of nano calcium carbonate, 10 parts of nano calcium sulfate, 10 parts of nano silicon dioxide, 10 parts of rubber powder, 10 parts of heat stabilizer and 10 parts of anti-aging agent.
Furthermore, the size of the nano calcium carbonate, the nano calcium sulfate and the nano silicon dioxide is 0.1-100 nm.
The invention has the beneficial effects that:
1) the modified asphalt prepared by the invention has good low temperature resistance, good high temperature resistance, large rigidity and flexibility, good stability and low cost; compared with the conventional modified asphalt, the low-temperature performance is improved by 30 percent, the high-temperature resistance is improved by 60 percent, and the manufacturing cost is 70 percent of that of the conventional modified asphalt, so that the cost is reduced, and the modified asphalt is more suitable for industrial application;
2) the preparation method provided by the invention is simple and stable, and can be applied on a large scale.
Detailed Description
The examples are given for the purpose of better illustration of the invention, but the 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 preparation of Nano-modified asphalt
The formula is as follows: 70 parts of asphalt, 40 parts of nano calcium carbonate, 40 parts of nano calcium sulfate, 40 parts of nano silicon dioxide, 5 parts of rubber powder, 5 parts of heat stabilizer and 5 parts of anti-aging agent.
The preparation method of the nano modified active mineral asphalt comprises the following steps:
(1) the installation formula selects the asphalt with the specified parts, then the asphalt is heated to 200-300 ℃ by using an electric heating furnace, and the rubber powder is added and uniformly stirred to fully disperse and mix;
(2) keeping the temperature of the asphalt constant at 200-300 ℃, adding the nano calcium carbonate, the nano calcium sulfate, the nano silicon dioxide and the surfactant according to the parts specified in the formula, uniformly stirring, and continuously dispersing and mixing;
(3) and finally, adding a heat stabilizer and an anti-aging agent in parts specified in the formula, inputting into a high-speed shearing homogenizing mill with oil-soluble heat preservation, and further dispersing and mixing at 200-300 ℃ to obtain the nano modified active mineral asphalt.
Example 2 preparation of Nano-modified asphalt
The formula is as follows: 80 parts of asphalt, 30 parts of nano calcium carbonate, 30 parts of nano calcium sulfate, 20 parts of nano silicon dioxide, 7 parts of rubber powder, 7 parts of heat stabilizer and 7 parts of anti-aging agent.
The preparation method of the nano modified active mineral asphalt comprises the following steps:
(1) the installation formula selects the asphalt with the specified parts, then the asphalt is heated to 200-300 ℃ by using an electric heating furnace, and the rubber powder is added and uniformly stirred to fully disperse and mix;
(2) keeping the temperature of the asphalt constant at 200-300 ℃, adding the nano calcium carbonate, the nano calcium sulfate, the nano silicon dioxide and the surfactant according to the parts specified in the formula, uniformly stirring, and continuously dispersing and mixing;
(3) and finally, adding a heat stabilizer and an anti-aging agent in parts specified in the formula, inputting into a high-speed shearing homogenizing mill with oil-soluble heat preservation, and further dispersing and mixing at 200-300 ℃ to obtain the nano modified active mineral asphalt.
Example 3 preparation of Nano-modified asphalt
The formula is as follows: 90 parts of asphalt, 10 parts of nano calcium carbonate, 10 parts of nano calcium sulfate, 10 parts of nano silicon dioxide, 10 parts of rubber powder, 10 parts of heat stabilizer and 10 parts of anti-aging agent.
The preparation method of the nano modified active mineral asphalt comprises the following steps:
(1) the installation formula selects the asphalt with the specified parts, then the asphalt is heated to 200-300 ℃ by using an electric heating furnace, and the rubber powder is added and uniformly stirred to fully disperse and mix;
(2) keeping the temperature of the asphalt constant at 200-300 ℃, adding the nano calcium carbonate, the nano calcium sulfate, the nano silicon dioxide and the surfactant according to the parts specified in the formula, uniformly stirring, and continuously dispersing and mixing;
(3) and finally, adding a heat stabilizer and an anti-aging agent in parts specified in the formula, inputting into a high-speed shearing homogenizing mill with oil-soluble heat preservation, and further dispersing and mixing at 200-300 ℃ to obtain the nano modified active mineral asphalt.
Comparative example 1 preparation of Nano-modified asphalt
The formula is as follows: 70 parts of asphalt, 5 parts of nano calcium carbonate, 40 parts of nano calcium sulfate, 40 parts of nano silicon dioxide, 5 parts of rubber powder, 5 parts of heat stabilizer and 5 parts of anti-aging agent.
The preparation method of the nano modified active mineral asphalt comprises the following steps:
(1) the installation formula selects the asphalt with the specified parts, then the asphalt is heated to 200-300 ℃ by using an electric heating furnace, and the rubber powder is added and uniformly stirred to fully disperse and mix;
(2) keeping the temperature of the asphalt constant at 200-300 ℃, adding the nano calcium carbonate, the nano calcium sulfate, the nano silicon dioxide and the surfactant according to the parts specified in the formula, uniformly stirring, and continuously dispersing and mixing;
(3) and finally, adding a heat stabilizer and an anti-aging agent in parts specified in the formula, inputting into a high-speed shearing homogenizing mill with oil-soluble heat preservation, and further dispersing and mixing at 200-300 ℃ to obtain the nano modified active mineral asphalt.
Comparative example 2 preparation of Nano-modified asphalt
The formula is as follows: 70 parts of asphalt, 40 parts of nano calcium carbonate, 40 parts of nano calcium sulfate, 40 parts of nano silicon dioxide, 5 parts of rubber powder, 5 parts of heat stabilizer and 5 parts of anti-aging agent.
The preparation method of the nano modified active mineral asphalt comprises the following steps:
(1) the installation formula selects the asphalt with the specified parts, then the asphalt is heated to 170 ℃ by using an electric heating furnace, and the rubber powder is added and uniformly stirred to fully disperse and mix;
(2) keeping the temperature of the asphalt constant at 170 ℃, adding the nano calcium carbonate, the nano calcium sulfate, the nano silicon dioxide and the surfactant in the specified parts according to the formula, uniformly stirring, and continuously dispersing and mixing;
(3) finally adding the specified parts of the formula
And (3) inputting a plurality of heat stabilizers and anti-aging agents into a high-speed shearing homogenizing mill with oil-soluble heat preservation, and further dispersing and mixing at 170 ℃ to obtain the nano modified active mineral asphalt.
Example 4 measurement of Properties
The nano-modified asphalts prepared in examples 1 to 3 and comparative examples 1 to 2 were subjected to a performance test, and the results thereof are shown in the following table:
the test result shows that: the nano modified asphalt prepared by the method has the advantages of good low temperature resistance, good high temperature resistance, large rigidity and flexibility and good stability, and after a large number of research experiments, the decisive effects of temperature control and a formula in the preparation method on the performance device of the nano modified asphalt are confirmed.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (6)
1. The preparation method of the nano modified asphalt is characterized in that the nano modified asphalt is prepared from the following components in parts by weight: 70-90 parts of asphalt, 10-40 parts of nano calcium carbonate, 10-40 parts of nano calcium sulfate, 10-40 parts of nano silicon dioxide, 5-10 parts of rubber powder, 5-10 parts of a heat stabilizer and 5-10 parts of an anti-aging agent, wherein the heat stabilizer is polyhydric alcohol, and the anti-aging agent is an antioxidant and a fluorine-containing cement base; the preparation method comprises the following steps:
1) heating the asphalt with the formula ratio to 200-300 ℃, adding the rubber powder, and uniformly stirring;
2) keeping the temperature of the asphalt constant at 200-300 ℃, and then adding the nano calcium carbonate, the nano calcium sulfate, the nano silicon dioxide and the surfactant according to the formula ratio and uniformly stirring;
3) and finally, adding a heat stabilizer and an anti-aging agent in a formula amount, inputting the mixture into a high-speed shearing homogenizing mill with oil-soluble heat preservation, and further dispersing and mixing at 200-300 ℃ to obtain the nano modified asphalt.
2. The preparation method of claim 1, wherein the nano modified asphalt is prepared from the following components in parts by weight: 70 parts of asphalt, 40 parts of nano calcium carbonate, 40 parts of nano calcium sulfate, 40 parts of nano silicon dioxide, 5 parts of rubber powder, 5 parts of heat stabilizer and 5 parts of anti-aging agent.
3. The preparation method of claim 1, wherein the nano modified asphalt is prepared from the following components in parts by weight: 80 parts of asphalt, 30 parts of nano calcium carbonate, 30 parts of nano calcium sulfate, 20 parts of nano silicon dioxide, 7 parts of rubber powder, 7 parts of heat stabilizer and 7 parts of anti-aging agent.
4. The preparation method of claim 1, wherein the nano modified asphalt is prepared from the following components in parts by weight: 90 parts of asphalt, 10 parts of nano calcium carbonate, 10 parts of nano calcium sulfate, 10 parts of nano silicon dioxide, 10 parts of rubber powder, 10 parts of heat stabilizer and 10 parts of anti-aging agent.
5. The method according to any one of claims 1 to 4, wherein the size of the nano calcium carbonate, nano calcium sulfate and nano silica is in the range of 0.1 to 100 nm.
6. The nano-modified asphalt prepared by the preparation method of any one of claims 1 to 5.
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| CN201911294735.9A CN110982287A (en) | 2019-12-16 | 2019-12-16 | Nano modified asphalt and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115073060A (en) * | 2022-05-10 | 2022-09-20 | 广东省水利水电第三工程局有限公司 | Hydraulic asphalt concrete, preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115073060A (en) * | 2022-05-10 | 2022-09-20 | 广东省水利水电第三工程局有限公司 | Hydraulic asphalt concrete, preparation method and application thereof |
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