CN110564170A - Modified asphalt for roads and bridges and preparation method thereof - Google Patents
Modified asphalt for roads and bridges and preparation method thereof Download PDFInfo
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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
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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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
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
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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
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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
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two 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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
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Abstract
the invention discloses modified asphalt for roads and bridges, which comprises, by weight, 60 ~ 80 parts of matrix asphalt, 6 ~ 8 parts of a dispersing agent, 6 ~ 8 parts of a plasticizer, 5 ~ 7 parts of polymer fibers, 0.5 ~ 1 part of a cross ~ linking agent, 0.5 ~ 1 part of a compatilizer, 1 ~ 2 parts of a stabilizer, 50 ~ 60 parts of aggregate, 40 ~ 50 parts of a filler, 1 ~ 3 parts of titanium dioxide, 1 ~ 1.5 parts of fatty alcohol polyoxyethylene ether ammonium sulfate, 4 ~ 6 parts of an ultraviolet absorbent, 15 ~ 20 parts of rubber powder, 1 ~ 2 parts of an emulsifier and 2 ~ 4 parts of an accelerator.
Description
Technical Field
The invention relates to the technical field of road building materials, in particular to modified asphalt for roads and bridges and a preparation method thereof.
Background
Along with the rapid development of highway road construction in China, the connection among various cities is strengthened, and cultural communication of different regions is promoted, but along with the increase of heavy traffic and the increase of tire pressure of vehicles, the rapid increase of the number of automobiles puts higher requirements on the highway road construction. The asphalt pavement is characterized in that mineral materials are mixed with various types of pavements paved with asphalt materials, and the asphalt mixture improves the capability of paving granules for resisting damage of driving and natural factors to the pavements, so that the pavements are smooth, less in dust, waterproof and durable. The asphalt pavement is made up by spreading and rolling asphalt mixture, and the asphalt mixture is made up by fully mixing asphalt material with a certain viscosity and proper dosage with a certain graded mineral aggregate. However, asphalt pavements also have various diseases such as cracking, moving, rutting, etc., and especially, the diseases are increasingly serious with the increase of heavy vehicles and the overload operation of the vehicles.
In the prior art, chinese patent No. CN108249825A discloses a method for preparing an asphalt mixture and the asphalt mixture, which uses asphalt, rubber, water-soluble silicate, ceramsite, perlite, slag and river sand, and the asphalt mixture is obtained by melting the above materials for four times, mixing and stirring at 170-185 ℃. Rubber is added in the middle preparation step of the asphalt mixture, so that the uniformity and the comprehensive performance of the asphalt mixture are improved, and the crack resistance of the asphalt mixture after paving is enhanced. However, the asphalt added with rubber has high viscosity, the mixture needs to be heated to high temperature in the construction process, so that the problems of stirring, transportation and rolling of the asphalt mixture are caused, the construction cost is high, and particularly in high-altitude mountain areas
The transportation distance is far away, the general lower place of ambient temperature, and the temperature of bituminous mixture descends too fast in links such as stirring, transportation, rolling to make the limitation of road surface construction strengthen, the time limit for a project extension, heating pitch and mineral aggregate simultaneously also need consume a large amount of energy, increase production and the production of waste gas, dust granule in the work progress, be unfavorable for environmental protection.
disclosure of Invention
The invention aims to solve the defects in the prior art and provides modified asphalt for roads and bridges, which is compact in structure, strong in pressure resistance and not easy to crack, and a preparation method thereof.
in order to achieve the purpose, the technical scheme of the invention is as follows:
the modified asphalt for the road and bridge is characterized by comprising, by weight, 60 ~ 80 parts of matrix asphalt, 6 ~ 8 parts of a dispersing agent, 6 ~ 8 parts of a plasticizer, 5 ~ 7 parts of polymer fibers, 0.5 ~ 1 part of a cross ~ linking agent, 0.5 ~ 1 part of a compatilizer, 1 ~ 2 parts of a stabilizer, 50 ~ 60 parts of aggregate, 40 ~ 50 parts of a filler, 1 ~ 3 parts of titanium dioxide, 1 ~ 1.5 parts of fatty alcohol polyoxyethylene ether ammonium sulfate, 4 ~ 6 parts of an ultraviolet absorbent, 15 ~ 20 parts of rubber powder and 1 ~ 2 parts of an emulsifier.
the rubber powder is prepared from, by weight, 65 ~ 75 parts of matrix asphalt, 6 ~ 8 parts of a dispersing agent, 6 ~ 8 parts of a plasticizer, 5 ~ 7 parts of polymer fibers, 0.5 ~ 1 part of a cross ~ linking agent, 0.5 ~ 1 part of a compatilizer, 1 ~ 2 parts of a stabilizer, 52 ~ 57 parts of aggregates, 42 ~ 47 parts of a filler, 1 ~ 3 parts of titanium dioxide, 1 ~ 1.5 parts of fatty alcohol polyoxyethylene ether ammonium sulfate, 4 ~ 6 parts of an ultraviolet absorbent, 17 ~ 19 parts of rubber powder and 1 ~ 2 parts of an emulsifier.
Preferably, the composition comprises the following components in parts by weight: 70 parts of matrix asphalt, 7 parts of dispersing agent, 7 parts of plasticizer, 6 parts of polymer fiber, 0.8 part of cross-linking agent, 0.8 part of compatilizer, 1.5 parts of stabilizer, 55 parts of aggregate, 45 parts of filler, 2 parts of titanium dioxide, 1.3 parts of fatty alcohol-polyoxyethylene ether ammonium sulfate, 5 parts of ultraviolet absorbent, 18 parts of rubber powder and 1.5 parts of emulsifier.
Preferably, the dispersant is one of sodium hexametaphosphate and sodium pyrophosphate; the plasticizer is one or a combination of more of dibutyl phthalate, tri-n-butyl citrate, dioctyl maleate or dioctyl phthalate.
Preferably, the polymer fiber is one or a combination of more of polypropylene fiber, polyvinyl alcohol fiber and polyacrylonitrile fiber; the cross-linking agent is one or a combination of more of methyl orthosilicate, aluminum isopropoxide and titanium acetylacetonate.
preferably, the compatilizer is rubber oil, furfural extract oil or petroleum fraction containing more than 80% of aromatic components; the stabilizer is sulfur.
preferably, the aggregate is one of crushed stone, expanded perlite and ceramsite; the filler comprises one of mineral powder, slaked lime and sand.
preferably, the ultraviolet absorbent is a mixture of 2, 4-dihydroxy benzophenone and hindered amine, the mass ratio of the hindered amine to the 2, 4-dihydroxy benzophenone is 1:3, the rubber powder is high-quality bias tire powder, and the average particle size of the powder is 40-50 meshes.
preferably, the emulsifier is one or a combination of more of alcohol ether carboxylate, phenol ether carboxylate, sorbitan ester polyoxyethylene ether, didodecylamine polyoxyethylene ether diquaternary ammonium hydrochloride or tween.
A preparation method of modified asphalt for roads and bridges is characterized by comprising the following steps: the method comprises the following steps: shearing matrix asphalt at the temperature of 200-300 ℃ for 60-90min, then sequentially adding a dispersing agent, a plasticizer, polymer fibers, a cross-linking agent, a compatilizer, a stabilizer, aggregate, filler, titanium dioxide, fatty alcohol polyoxyethylene ether ammonium sulfate, an ultraviolet absorbent, rubber powder and an emulsifier every 5-10min, and then stirring for 200-500min at the temperature of 300-350 ℃ and the rotating speed of 700-1400 r/min to obtain the modified asphalt material.
the asphalt material has good ageing resistance, excellent mechanical property and strong binding force with aggregate or construction base surface, and the preparation process of the asphalt material is reasonable, the flow is simple and easy to realize, in order to realize the technical effects, the invention modifies the matrix asphalt through various additives, firstly, the titanium dioxide and the ultraviolet absorbent have very strong ultraviolet absorption capacity and excellent thermal stability, and can obviously reduce the influence of illumination on the asphalt material and improve the ageing resistance of the asphalt material; secondly, due to the addition of the emulsifier and the compatilizer, the two additives have good compatibility with each component in the asphalt, so that the crack resistance and the shear resistance of the asphalt material can be effectively improved, and the mechanical property of the asphalt material is further improved; thirdly, the modified asphalt material of the scheme has reasonable modification process, simple steps and easy industrial large-scale use.
Detailed Description
in order to provide a further understanding and appreciation for the structural features and advantages achieved by the present invention, the following detailed description of the preferred embodiments is provided:
Example 1
The modified asphalt for the road and the bridge is characterized in that: the paint comprises the following components in parts by weight: 60 parts of matrix asphalt, 6 parts of dispersing agent, 6 parts of plasticizer, 5 parts of polymer fiber, 0.5 part of cross-linking agent, 0.5 part of compatilizer, 1 part of stabilizer, 50 parts of aggregate, 40 parts of filler, 1 part of titanium dioxide, 1 part of fatty alcohol polyoxyethylene ether ammonium sulfate, 4 parts of ultraviolet absorbent, 15 parts of rubber powder and 1 part of emulsifier.
wherein the dispersant is sodium hexametaphosphate, and the plasticizer is dibutyl phthalate;
Wherein the polymer fiber is polypropylene fiber, and the cross-linking agent is methyl orthosilicate;
Wherein the compatilizer is rubber oil, and the stabilizer is sulfur;
Wherein the aggregate is expanded perlite, and the filler comprises mineral powder;
Wherein the ultraviolet absorbent is a mixture of 2, 4-dihydroxy benzophenone and hindered amine, the mass ratio of the hindered amine to the 2, 4-dihydroxy benzophenone is 1:3, the rubber powder is high-quality bias tyre powder, the average particle size of the powder is 45 meshes, and the emulsifier is alcohol ether carboxylate;
The preparation method of the modified asphalt for the road and the bridge comprises the following steps: shearing matrix asphalt at the temperature of 200-300 ℃ for 60-90min, then sequentially adding a dispersing agent, a plasticizer, polymer fibers, a cross-linking agent, a compatilizer, a stabilizer, aggregate, filler, titanium dioxide, fatty alcohol polyoxyethylene ether ammonium sulfate, an ultraviolet absorbent, rubber powder and an emulsifier every 5-10min, and then stirring for 200-500min at the temperature of 300-350 ℃ and the rotating speed of 700-1400 r/min to obtain the modified asphalt material.
Example 2
The modified asphalt for the road and the bridge is characterized in that: the paint comprises the following components in parts by weight: 65 parts of matrix asphalt, 7 parts of dispersing agent, 6 parts of plasticizer, 5 parts of polymer fiber, 0.7 part of cross-linking agent, 0.6 part of compatilizer, 1 part of stabilizer, 52 parts of aggregate, 42 parts of filler, 2 parts of titanium dioxide, 1.2 parts of fatty alcohol polyoxyethylene ether ammonium sulfate, 5 parts of ultraviolet absorbent, 16 parts of rubber powder and 1 part of emulsifier.
Wherein the dispersant is sodium hexametaphosphate, and the plasticizer is dibutyl phthalate;
wherein the polymer fiber is polypropylene fiber, and the cross-linking agent is methyl orthosilicate;
Wherein the compatilizer is rubber oil, and the stabilizer is sulfur;
Wherein the aggregate is expanded perlite, and the filler comprises mineral powder;
Wherein the ultraviolet absorbent is a mixture of 2, 4-dihydroxy benzophenone and hindered amine, the mass ratio of the hindered amine to the 2, 4-dihydroxy benzophenone is 1:3, the rubber powder is high-quality bias tyre powder, the average particle size of the powder is 45 meshes, and the emulsifier is alcohol ether carboxylate;
The preparation method of the modified asphalt for the road and the bridge comprises the following steps: shearing matrix asphalt at the temperature of 200-300 ℃ for 60-90min, then sequentially adding a dispersing agent, a plasticizer, polymer fibers, a cross-linking agent, a compatilizer, a stabilizer, aggregate, filler, titanium dioxide, fatty alcohol polyoxyethylene ether ammonium sulfate, an ultraviolet absorbent, rubber powder and an emulsifier every 5-10min, and then stirring for 200-500min at the temperature of 300-350 ℃ and the rotating speed of 700-1400 r/min to obtain the modified asphalt material.
example 3
The modified asphalt for the road and the bridge is characterized in that: the paint comprises the following components in parts by weight: 70 parts of matrix asphalt, 7 parts of dispersing agent, 7 parts of plasticizer, 6 parts of polymer fiber, 0.8 part of cross-linking agent, 0.8 part of compatilizer, 1.5 parts of stabilizer, 55 parts of aggregate, 45 parts of filler, 2 parts of titanium dioxide, 1.3 parts of fatty alcohol-polyoxyethylene ether ammonium sulfate, 5 parts of ultraviolet absorbent, 18 parts of rubber powder and 1.5 parts of emulsifier.
Wherein the dispersant is sodium hexametaphosphate, and the plasticizer is dibutyl phthalate;
wherein the polymer fiber is polypropylene fiber, and the cross-linking agent is methyl orthosilicate;
wherein the compatilizer is rubber oil, and the stabilizer is sulfur;
Wherein the aggregate is expanded perlite, and the filler comprises mineral powder;
Wherein the ultraviolet absorbent is a mixture of 2, 4-dihydroxy benzophenone and hindered amine, the mass ratio of the hindered amine to the 2, 4-dihydroxy benzophenone is 1:3, the rubber powder is high-quality bias tyre powder, the average particle size of the powder is 45 meshes, and the emulsifier is alcohol ether carboxylate;
the preparation method of the modified asphalt for the road and the bridge comprises the following steps: shearing matrix asphalt at the temperature of 200-300 ℃ for 60-90min, then sequentially adding a dispersing agent, a plasticizer, polymer fibers, a cross-linking agent, a compatilizer, a stabilizer, aggregate, filler, titanium dioxide, fatty alcohol polyoxyethylene ether ammonium sulfate, an ultraviolet absorbent, rubber powder and an emulsifier every 5-10min, and then stirring for 200-500min at the temperature of 300-350 ℃ and the rotating speed of 700-1400 r/min to obtain the modified asphalt material.
Example 4
The modified asphalt for the road and the bridge is characterized in that: the paint comprises the following components in parts by weight: 75 parts of matrix asphalt, 8 parts of dispersing agent, 7 parts of plasticizer, 6 parts of polymer fiber, 0.9 part of cross-linking agent, 0.7 part of compatilizer, 1.5 parts of stabilizer, 57 parts of aggregate, 47 parts of filler, 2 parts of titanium dioxide, 1.4 parts of fatty alcohol-polyoxyethylene ether ammonium sulfate, 6 parts of ultraviolet absorbent, 17 parts of rubber powder and 2 parts of emulsifier.
Wherein the dispersant is sodium hexametaphosphate, and the plasticizer is dibutyl phthalate;
Wherein the polymer fiber is polypropylene fiber, and the cross-linking agent is methyl orthosilicate;
Wherein the compatilizer is rubber oil, and the stabilizer is sulfur;
Wherein the aggregate is expanded perlite, and the filler comprises mineral powder;
Wherein the ultraviolet absorbent is a mixture of 2, 4-dihydroxy benzophenone and hindered amine, the mass ratio of the hindered amine to the 2, 4-dihydroxy benzophenone is 1:3, the rubber powder is high-quality bias tyre powder, the average particle size of the powder is 45 meshes, and the emulsifier is alcohol ether carboxylate;
the preparation method of the modified asphalt for the road and the bridge comprises the following steps: shearing matrix asphalt at the temperature of 200-300 ℃ for 60-90min, then sequentially adding a dispersing agent, a plasticizer, polymer fibers, a cross-linking agent, a compatilizer, a stabilizer, aggregate, filler, titanium dioxide, fatty alcohol polyoxyethylene ether ammonium sulfate, an ultraviolet absorbent, rubber powder and an emulsifier every 5-10min, and then stirring for 200-500min at the temperature of 300-350 ℃ and the rotating speed of 700-1400 r/min to obtain the modified asphalt material.
Example 5
The modified asphalt for the road and the bridge is characterized in that: the paint comprises the following components in parts by weight: 80 parts of matrix asphalt, 7 parts of dispersing agent, 8 parts of plasticizer, 7 parts of polymer fiber, 0.6 part of cross-linking agent, 0.9 part of compatilizer, 2 parts of stabilizer, 60 parts of aggregate, 50 parts of filler, 3 parts of titanium dioxide, 1.1 part of fatty alcohol polyoxyethylene ether ammonium sulfate, 4 parts of ultraviolet absorbent, 19 parts of rubber powder and 1.5 parts of emulsifier.
Wherein the dispersant is sodium hexametaphosphate, and the plasticizer is dibutyl phthalate;
wherein the polymer fiber is polypropylene fiber, and the cross-linking agent is methyl orthosilicate;
Wherein the compatilizer is rubber oil, and the stabilizer is sulfur;
Wherein the aggregate is expanded perlite, and the filler comprises mineral powder;
Wherein the ultraviolet absorbent is a mixture of 2, 4-dihydroxy benzophenone and hindered amine, the mass ratio of the hindered amine to the 2, 4-dihydroxy benzophenone is 1:3, the rubber powder is high-quality bias tyre powder, the average particle size of the powder is 45 meshes, and the emulsifier is alcohol ether carboxylate;
the preparation method of the modified asphalt for the road and the bridge comprises the following steps: shearing matrix asphalt at the temperature of 200-300 ℃ for 60-90min, then sequentially adding a dispersing agent, a plasticizer, polymer fibers, a cross-linking agent, a compatilizer, a stabilizer, aggregate, filler, titanium dioxide, fatty alcohol polyoxyethylene ether ammonium sulfate, an ultraviolet absorbent, rubber powder and an emulsifier every 5-10min, and then stirring for 200-500min at the temperature of 300-350 ℃ and the rotating speed of 700-1400 r/min to obtain the modified asphalt material.
Table 1 below shows the results of the performance tests of the modified asphalt materials prepared in the above examples, wherein the indexes were tested according to the test methods in road engineering asphalt and asphalt mixture test protocol (JTG E20-2011).
TABLE 1 asphalt materials Performance testing
| Softening point/. degree.C | Penetration (25 ℃, 5s, 100 g)/0.1 mm | Ductility/cm (10 ℃ C.) | |
| Base asphalt | 40 | 80.2 | 135 |
| Example 1 | 42.1 | 80.4 | 140 |
| Example 2 | 42.3 | 80.1 | 150 |
| Example 3 | 43.2 | 80.3 | 160 |
| Example 4 | 42.8 | 80.1 | 155 |
| Example 5 | 42.6 | 80.3 | 145 |
As can be seen from the experimental data in the above table 1, in the five groups of examples of the asphalt material prepared by the scheme, the softening point is improved by 2-3 ℃ compared with that of the matrix asphalt, which indicates that the high temperature resistance of the modified asphalt material is improved, and the influence of the addition of the modified material on the penetration of the asphalt material is small; ductility experiment data show that the tensile resistance of the modified asphalt material is obviously improved, wherein example 3 is the best scheme.
the foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. the modified asphalt for the road and bridge is characterized by comprising, by weight, 60 ~ 80 parts of matrix asphalt, 6 ~ 8 parts of a dispersing agent, 6 ~ 8 parts of a plasticizer, 5 ~ 7 parts of polymer fibers, 0.5 ~ 1 part of a cross ~ linking agent, 0.5 ~ 1 part of a compatilizer, 1 ~ 2 parts of a stabilizer, 50 ~ 60 parts of aggregate, 40 ~ 50 parts of a filler, 1 ~ 3 parts of titanium dioxide, 1 ~ 1.5 parts of fatty alcohol polyoxyethylene ether ammonium sulfate, 4 ~ 6 parts of an ultraviolet absorbent, 15 ~ 20 parts of rubber powder and 1 ~ 2 parts of an emulsifier.
2. the modified asphalt for roads and bridges as claimed in claim 1, which is characterized by comprising, by weight, 65 ~ 75 parts of matrix asphalt, 6 ~ 8 parts of a dispersing agent, 6 ~ 8 parts of a plasticizer, 5 ~ 7 parts of polymer fibers, 0.5 ~ 1 part of a cross ~ linking agent, 0.5 ~ 1 part of a compatilizer, 1 ~ 2 parts of a stabilizer, 52 ~ 57 parts of aggregate, 42 ~ 47 parts of a filler, 1 ~ 3 parts of titanium dioxide, 1 ~ 1.5 parts of fatty alcohol polyoxyethylene ether ammonium sulfate, 4 ~ 6 parts of an ultraviolet absorbent, 17 ~ 19 parts of rubber powder and 1 ~ 2 parts of an emulsifier.
3. the modified asphalt for roads and bridges of claim 1, which is characterized in that: the paint comprises the following components in parts by weight: 70 parts of matrix asphalt, 7 parts of dispersing agent, 7 parts of plasticizer, 6 parts of polymer fiber, 0.8 part of cross-linking agent, 0.8 part of compatilizer, 1.5 parts of stabilizer, 55 parts of aggregate, 45 parts of filler, 2 parts of titanium dioxide, 1.3 parts of fatty alcohol-polyoxyethylene ether ammonium sulfate, 5 parts of ultraviolet absorbent, 18 parts of rubber powder and 1.5 parts of emulsifier.
4. the modified asphalt for roads and bridges of claim 1, which is characterized in that: the dispersing agent is one of sodium hexametaphosphate and sodium pyrophosphate; the plasticizer is one or a combination of more of dibutyl phthalate, tri-n-butyl citrate, dioctyl maleate or dioctyl phthalate.
5. The modified asphalt for roads and bridges of claim 1, which is characterized in that: the polymer fiber is one or a combination of a plurality of polypropylene fibers, polyvinyl alcohol fibers and polyacrylonitrile fibers; the cross-linking agent is one or a combination of more of methyl orthosilicate, aluminum isopropoxide and titanium acetylacetonate.
6. The modified asphalt for roads and bridges of claim 1, which is characterized in that: the compatilizer is rubber oil, furfural extract oil or petroleum fraction containing more than 80% of aromatic components; the stabilizer is sulfur.
7. The modified asphalt for roads and bridges of claim 1, which is characterized in that: the aggregate is one of macadam, expanded perlite and ceramsite; the filler comprises one of mineral powder, slaked lime and sand.
8. the modified asphalt for roads and bridges as claimed in claim 1, wherein the ultraviolet absorber is a mixture of 2, 4-dihydroxybenzophenone and hindered amine, the mass ratio of the hindered amine to the 2, 4-dihydroxybenzophenone is 1:3, the rubber powder is high-quality bias tire powder, and the average particle size of the powder is 40-50 meshes.
9. the modified asphalt for roads and bridges of claim 1, which is characterized in that: the emulsifier is one or a combination of more of alcohol ether carboxylate, phenol ether carboxylate, sorbitan ester polyoxyethylene ether, didodecylamine polyoxyethylene ether diquaternary ammonium hydrochloride or tween.
10. A method for preparing the modified asphalt for roads and bridges as claimed in any one of claims 1 to 9, which is characterized in that: the method comprises the following steps: shearing matrix asphalt at the temperature of 200-300 ℃ for 60-90min, then sequentially adding a dispersing agent, a plasticizer, polymer fibers, a cross-linking agent, a compatilizer, a stabilizer, aggregate, filler, titanium dioxide, fatty alcohol polyoxyethylene ether ammonium sulfate, an ultraviolet absorbent, rubber powder and an emulsifier every 5-10min, and then stirring for 200-500min at the temperature of 300-350 ℃ and the rotating speed of 700-1400 r/min to obtain the modified asphalt material.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112390569A (en) * | 2020-11-04 | 2021-02-23 | 广东诚泰投资集团有限公司 | Anti-migration asphalt mixture |
| CN112812577A (en) * | 2020-12-21 | 2021-05-18 | 徐州市融道路桥有限公司 | Anti-aging environment-friendly modified asphalt material and preparation method thereof |
| CN114605844A (en) * | 2022-03-14 | 2022-06-10 | 广州大象超薄路面技术开发有限公司 | Ultraviolet light aging resistant desulfurized rubber powder modified asphalt and preparation method thereof |
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| CN114605844B (en) * | 2022-03-14 | 2023-10-13 | 广州大象超薄路面技术开发有限公司 | Ultraviolet aging resistant desulfurization rubber powder modified asphalt and preparation method thereof |
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Application publication date: 20191213 |