CN111303509A - Novel ultraviolet aging resistant high-viscosity asphalt and preparation method thereof - Google Patents
Novel ultraviolet aging resistant high-viscosity asphalt and preparation method thereof Download PDFInfo
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L19/00—Compositions of rubbers not provided for in groups C08L7/00 - C08L17/00
- C08L19/003—Precrosslinked rubber; Scrap rubber; Used vulcanised rubber
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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
- C08K2003/329—Phosphorus containing acids
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2555/00—Characteristics of bituminous mixtures
- C08L2555/30—Environmental or health characteristics, e.g. energy consumption, recycling or safety issues
- C08L2555/34—Recycled or waste materials, e.g. reclaimed bitumen, asphalt, roads or pathways, recycled roof coverings or shingles, recycled aggregate, recycled tires, crumb rubber, glass or cullet, fly or fuel ash, or slag
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- C—CHEMISTRY; METALLURGY
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- 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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- 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
- C08L2555/60—Organic non-macromolecular ingredients, e.g. oil, fat, wax or natural dye
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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
- C08L2555/80—Macromolecular constituents
Abstract
The novel ultraviolet aging resistant high-viscosity asphalt provided by the invention is prepared by adding terpene resin, waste rubber powder, polyphosphoric acid (PPA), hindered amine light stabilizer, North American rock asphalt, stabilizer and cosolvent into SK90 matrix asphalt; the waste rubber powder is used as a modifier, so that the pollutants are recycled, the quality of the asphalt is reduced, and the advantages of environmental protection and cost reduction are both considered; the hindered amine light stabilizer is added, so that the ultraviolet aging resistance of the asphalt is improved, and the durability of the asphalt is improved; after the terpene resin, the waste rubber powder, the polyphosphoric acid (PPA) and the rock asphalt are modified into the matrix asphalt according to the preparation method, the anti-rutting performance, the high-temperature performance, the low-temperature performance, the fatigue resistance and the ultraviolet aging resistance of the asphalt pavement are greatly improved; meanwhile, the bonding capability of the ultraviolet aging resistant high-viscosity modified asphalt and aggregates and the water damage resistance of the corresponding asphalt mixture are greatly improved.
Description
Technical Field
The invention relates to the technical field of asphalt materials for road engineering, in particular to novel ultraviolet aging resistant high-viscosity asphalt and a preparation method thereof.
Background
In recent years, with the rapid development of roads in China, the problems of road safety and environmental protection are more and more concerned by people in the face of the aggravation of traffic heavy load conditions and the increasing requirement for road maintenance. The drainage pavement is a novel pavement developed in developed countries since the 70 th century, can reduce the occurrence of hazards such as water splashing, spraying and the like, and simultaneously increases the friction coefficient of a road surface and the anti-rutting capability of the pavement, thereby further increasing the driving safety. In addition, the porosity of the drainage asphalt mixture reaches 15% -20%, so that the technical approach of reducing noise can be applied to urban roads, the drainage asphalt mixture is an environment-friendly pavement, but the possibility of being eroded by water, air and sunlight is increased, and the traditional asphalt is difficult to completely meet the practical requirement. Since the property of asphalt has a great influence on the road-use performance of the water-repellent asphalt mixture, high-viscosity modified asphalt should be selected as the binder. Relevant researches show that ultraviolet rays can greatly accelerate the aging of asphalt, the durability of asphalt pavement is greatly reduced, and the light aging performance of the asphalt needs to be improved when the asphalt is used.
At present, the most popular imported high-viscosity modifiers in the domestic market are TPS modifiers and SK modifiers, but the modifiers have the defects of high price, poor high-low temperature performance, general durability and the like, and the application of the modifiers in pavement engineering is greatly restricted. Therefore, a new high-viscosity asphalt with better performance and lower cost needs to be developed to meet the market demand.
Disclosure of Invention
The invention aims to provide novel ultraviolet aging resistant high-viscosity asphalt and a preparation method thereof, and solves the defects in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention provides novel ultraviolet aging resistant high-viscosity asphalt, which comprises the following raw materials: terpene resin, waste rubber powder, polyphosphoric acid, rock asphalt, matrix asphalt, a hindered amine light stabilizer, a stabilizer and a cosolvent, wherein the terpene resin, the waste rubber powder, the polyphosphoric acid, the rock asphalt, the hindered amine light stabilizer, the stabilizer and the cosolvent respectively account for (4-10)%, (12-18)%, (1-2.5)%, (4-10)%, 1.5%, 1% and 0.5% of the mass of the matrix asphalt.
Preferably, the following raw materials are included: the asphalt comprises terpene resin, waste rubber powder, polyphosphoric acid, rock asphalt, matrix asphalt, hindered amine light stabilizer, stabilizer and cosolvent, wherein the terpene resin, the waste rubber powder, the polyphosphoric acid, the rock asphalt, the hindered amine light stabilizer, the stabilizer and the cosolvent respectively account for 10%, 18%, 2.5%, 10%, 1.5%, 1% and 0.5% of the mass of the matrix asphalt.
Preferably, the terpene resin is a jinlin brand T100 number terpene resin.
Preferably, the rock asphalt is north american rock asphalt.
Preferably, SK90 is used as the base asphalt.
A preparation method of novel ultraviolet aging resistant high-viscosity asphalt comprises the following steps of:
step 1, heating the weighed matrix asphalt until the matrix asphalt is melted, then sequentially adding the weighed waste rubber powder, polyphosphoric acid, rock asphalt, hindered amine light stabilizer, stabilizer and cosolvent, and uniformly stirring to obtain a mixture A;
step 2, heating the terpene resin, slowly adding the terpene resin into the mixture A obtained in the step 2, and uniformly stirring; obtaining a mixture B;
step 3, shearing the mixture B obtained in the step 2 at constant temperature to obtain a mixture C;
and 4, swelling and developing the mixture C obtained in the step 3 at constant temperature to obtain the novel ultraviolet aging resistant high-viscosity asphalt.
Preferably, in step 3, the terpene resin is in a block structure.
Preferably, in step 4, the process parameters of the constant temperature shearing are as follows: shearing at 170 deg.C and 5000r/min for 45 min.
Preferably, in step 5, the process parameters for constant temperature swelling development are: developing at 170 deg.C for 60 min.
Compared with the prior art, the invention has the beneficial effects that:
the novel ultraviolet aging resistant high-viscosity asphalt provided by the invention is prepared by adding terpene resin, waste rubber powder, polyphosphoric acid (PPA), hindered amine light stabilizer, North American rock asphalt, stabilizer and cosolvent into SK90 matrix asphalt; the waste rubber powder is used as a modifier, so that the pollutants are recycled, the quality of the asphalt is reduced, and the advantages of environmental protection and cost reduction are both considered; the hindered amine light stabilizer is added, so that the ultraviolet aging resistance of the asphalt is improved, and the durability of the asphalt is improved; after the terpene resin, the waste rubber powder, the polyphosphoric acid (PPA) and the rock asphalt are modified into the matrix asphalt according to the preparation method, the anti-rutting performance, the high-temperature performance, the low-temperature performance, the fatigue resistance and the ultraviolet aging resistance of the asphalt pavement are greatly improved; meanwhile, the bonding capability of the ultraviolet aging resistant high-viscosity modified asphalt and aggregates and the water damage resistance of the corresponding asphalt mixture are greatly improved.
The preparation method of the novel ultraviolet aging resistant high-viscosity modified asphalt provided by the invention can be obtained by only sequentially mixing, heating, shearing, stirring and swelling, and is simple.
Drawings
Fig. 1 is a flow chart relating to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The invention provides novel ultraviolet aging resistant high-viscosity modified asphalt which comprises the following raw materials: terpene resin, waste rubber powder, polyphosphoric acid, rock asphalt, matrix asphalt, a hindered amine light stabilizer, a stabilizer and a cosolvent, wherein the terpene resin, the waste rubber powder, the polyphosphoric acid, the rock asphalt, the hindered amine light stabilizer, the stabilizer and the cosolvent respectively account for (4-10)%, (12-18)%, (1-2.5)%, (4-10)%, 1.5%, 1% and 0.5% of the mass of the matrix asphalt.
Wherein the terpene resin is Jinlin brand No. T100 terpene resin; the amount of the terpene resin is optimally 10% of the mass of the matrix asphalt.
The particle size of the waste rubber powder is 40 meshes, and the optimal mixing amount is 18%.
The optimal mixing amount of the polyphosphoric acid is 2.5 percent.
The rock asphalt is North America rock asphalt, and the optimal mixing amount of the North America rock asphalt is 10%.
As shown in figure 1, the preparation method of the novel ultraviolet aging resistant high-viscosity modified asphalt provided by the invention comprises the following steps:
step 1, weighing terpene resin, waste rubber powder, polyphosphoric acid, rock asphalt, matrix asphalt, hindered amine light stabilizer, stabilizer and cosolvent, wherein the terpene resin, the waste rubber powder, the polyphosphoric acid, the rock asphalt, the hindered amine light stabilizer, the stabilizer and the cosolvent respectively account for 4-10 percent, (12-18 percent), (1-2.5 percent), (4-10 percent), (1.5 percent), (1 percent and 0.5 percent of the mass of the matrix asphalt.
Step 2, heating the matrix asphalt to 140 ℃ by using an oven until the matrix asphalt is melted, adding waste rubber powder, and manually stirring for 3-5 min; adding polyphosphoric acid (PPA) and stirring for 1-3 min; adding rock asphalt, and manually stirring for 1-3 min; adding hindered amine light stabilizer, and manually stirring for 1-2 min; adding stabilizer, and stirring for 1-2 min; finally adding the cosolvent and manually stirring for 1-2 min; obtaining a mixture A;
step 3, crushing the flaky terpene resin into small blocks, heating to a molten state, slowly adding the terpene resin into the mixture A obtained in the step 2 at the speed of 1000r/min, and manually stirring for 2min at the rotating speed; and shearing the mixture B at the speed of 1000r/min, and ensuring uniform mixing on the premise of ensuring that stirring is not splashed.
And 4, step 4: opening the shearing machine, and shearing the mixture B at constant temperature to obtain a mixture C;
and 5: and (4) placing the mixture C obtained in the step (4) in an oven, and swelling and developing at constant temperature to obtain the novel ultraviolet aging resistant high-viscosity asphalt.
In the step 4, the temperature of constant temperature shearing is 170 ℃, the rotating speed of the shearing machine is 5000r/min, and the shearing time is 45 min.
And 5, the temperature and the time for swelling development in the oven are 170 ℃ and 60min respectively.
Example 1
Step 1: weighing terpene resin, waste rubber powder, polyphosphoric acid, North American rock asphalt, SK90 asphalt, hindered amine light stabilizer, stabilizer and cosolvent, wherein the terpene resin, waste rubber powder, polyphosphoric acid, rock asphalt, hindered amine light stabilizer, stabilizer and cosolvent respectively account for 4%, 12%, 1%, 4%, 1.5%, 1% and 0.5% of the mass of the matrix asphalt.
Step 2: heating the matrix asphalt to 140 ℃ by using an oven until the matrix asphalt is melted, adding the waste rubber powder, manually stirring for 3-5min, adding PPA, continuously and manually stirring for 1-3min, adding the North American rock asphalt, manually stirring for 1-3min, adding the hindered amine light stabilizer, manually stirring for 1-2min, adding the stabilizer, manually stirring for 1-2min, and finally adding the cosolvent, and manually stirring for 1-2 min; a mixture a is obtained.
And step 3: crushing the flaky terpene resin into small blocks, heating to 170 ℃, slowly adding the terpene resin into the mixture A at the speed of 1000r/min, and manually stirring for 2min at the rotating speed; a mixture B was obtained.
And 4, step 4: and opening the shearing machine, and carrying out constant-temperature shearing on the mixture B at the temperature of 170 ℃ and at the rotating speed of 5000r/min for 45min to obtain a mixture C.
And 5: and (4) placing the mixture C obtained in the step (4) in an oven, and carrying out constant-temperature swelling development for 60min at the temperature of 170 ℃ to obtain the novel ultraviolet aging resistant high-viscosity asphalt.
Example 2
Step 1: weighing terpene resin, waste rubber powder, polyphosphoric acid, North American rock asphalt, SK90 asphalt, hindered amine light stabilizer, stabilizer and cosolvent, wherein the terpene resin, waste rubber powder, polyphosphoric acid, rock asphalt, hindered amine light stabilizer, stabilizer and cosolvent respectively account for 6%, 14%, 1.5%, 6%, 1.5%, 1% and 0.5% of the mass of the matrix asphalt.
Step 2: heating the matrix asphalt to 140 ℃ by using an oven until the matrix asphalt is melted, adding the waste rubber powder, manually stirring for 3-5min, adding PPA, continuously and manually stirring for 1-3min, adding the North American rock asphalt, manually stirring for 1-3min, adding the hindered amine light stabilizer, manually stirring for 1-2min, adding the stabilizer, manually stirring for 1-2min, and finally adding the cosolvent, and manually stirring for 1-2 min; a mixture a is obtained.
And step 3: crushing the flaky terpene resin into small blocks, heating to 170 ℃, slowly adding the terpene resin into the mixture A at the speed of 1000r/min, and manually stirring for 2min at the rotating speed; a mixture B was obtained.
And 4, step 4: and opening the shearing machine, and carrying out constant-temperature shearing on the mixture B at the temperature of 170 ℃ and at the rotating speed of 5000r/min for 45min to obtain a mixture C.
And 5: placing the mixture C obtained in the step 4 in an oven, and swelling and developing at a constant temperature of 170 ℃ for 60min to obtain the novel ultraviolet aging resistant high-viscosity asphalt
Embodiment 3
Step 1: weighing terpene resin, waste rubber powder, polyphosphoric acid, North American rock asphalt, SK90 asphalt, hindered amine light stabilizer, stabilizer and cosolvent, wherein the terpene resin, waste rubber powder, polyphosphoric acid, rock asphalt, hindered amine light stabilizer, stabilizer and cosolvent respectively account for 8%, 16%, 2%, 8%, 1.5%, 1% and 0.5% of the mass of the matrix asphalt.
Step 2: heating the matrix asphalt to 130-140 ℃ by using an oven until the matrix asphalt is melted, adding the waste rubber powder, manually stirring for 3-5min, adding PPA, continuously and manually stirring for 1-3min, adding the North American rock asphalt, manually stirring for 1-3min, adding the hindered amine light stabilizer, manually stirring for 1-2min, adding the stabilizer, manually stirring for 1-2min, and finally adding the cosolvent, and manually stirring for 1-2min to obtain a mixture A.
And step 3: crushing the flaky terpene resin into small blocks, heating to 170 ℃, slowly adding the terpene resin into the mixture A at the speed of 1000r/min, and manually stirring for 2min at the rotating speed; a mixture B was obtained.
And 4, step 4: and opening the shearing machine, and carrying out constant-temperature shearing on the mixture B at the temperature of 170 ℃ and at the rotating speed of 5000r/min for 45min to obtain a mixture C.
And 5: and (4) placing the mixture C obtained in the step (4) in an oven, and carrying out constant-temperature swelling development for 60min at the temperature of 170 ℃ to obtain the novel ultraviolet aging resistant high-viscosity asphalt.
Example 4
Step 1: weighing terpene resin, waste rubber powder, polyphosphoric acid, North American rock asphalt, SK90 asphalt, hindered amine light stabilizer, stabilizer and cosolvent, wherein the terpene resin, the waste rubber powder, the polyphosphoric acid, the rock asphalt, the hindered amine light stabilizer, the stabilizer and the cosolvent respectively account for 10%, 18%, 2.5%, 10%, 1.5%, 1% and 0.5% of the mass of the matrix asphalt;
step 2: heating the matrix asphalt to 130-140 ℃ by using an oven until the matrix asphalt is melted, adding the waste rubber powder, manually stirring for 3-5min, adding PPA, continuously and manually stirring for 1-3min, adding the North American rock asphalt, manually stirring for 1-3min, adding the hindered amine light stabilizer, manually stirring for 1-2min, adding the stabilizer, manually stirring for 1-2min, and finally adding the cosolvent, and manually stirring for 1-2min to obtain a mixture A.
And step 3: crushing the flaky terpene resin into small blocks, heating to 170 ℃, slowly adding the terpene resin into the mixture A at the speed of 1000r/min, and manually stirring for 2min at the rotating speed; a mixture B was obtained.
And 4, step 4: and opening the shearing machine, and carrying out constant-temperature shearing on the mixture B at the temperature of 170 ℃ and at the rotating speed of 5000r/min for 45min to obtain a mixture C.
And 5: and (4) placing the mixture C obtained in the step (4) in an oven, and carrying out constant-temperature swelling development for 60min at the temperature of 170 ℃ to obtain the novel ultraviolet aging resistant high-viscosity asphalt.
In the above examples, SK90 was used as the base asphalt, and the used additives were all stabilizers and co-solvents produced by Jinan Chang transportation facilities Co.
Comparative example
The matrix asphalt and the modified asphalt obtained in the embodiment 1-4 are respectively tested according to the test specification of road engineering asphalt and asphalt mixture T0604-2011, T0605-2011, T0606-2011 and T0620-2011. Compared with the index requirements of high-viscosity asphalt in the technical Specification for construction of road asphalt pavements and the test procedure for road engineering asphalt and asphalt mixtures (JTG E20-2011), the results of the comparison with the traditional high-viscosity asphalt are shown in the following table 1:
TABLE 1 comparison with conventional high-viscosity asphalt indexes
The data show that the invention meets the technical requirements of various indexes of high-viscosity asphalt in the technical Specification for construction of road asphalt pavement, and particularly, the dynamic viscosity at 60 ℃ in the implementation cases 3-4 is higher than that of the traditional TPS high-viscosity asphalt, which shows that the bonding force of the TPS high-viscosity asphalt to the aggregate is stronger. The Brookfield viscosity at 135 ℃ in the embodiment examples 1-2 is smaller than that of the traditional TPS high-viscosity asphalt, which shows that the mixing performance is better. Can meet the technical requirements of using high-viscosity asphalt in the current drainage pavement.
Claims (9)
1. The novel ultraviolet aging resistant high-viscosity asphalt is characterized by comprising the following raw materials: terpene resin, waste rubber powder, polyphosphoric acid, rock asphalt, matrix asphalt, a hindered amine light stabilizer, a stabilizer and a cosolvent, wherein the terpene resin, the waste rubber powder, the polyphosphoric acid, the rock asphalt, the hindered amine light stabilizer, the stabilizer and the cosolvent respectively account for (4-10)%, (12-18)%, (1-2.5)%, (4-10)%, 1.5%, 1% and 0.5% of the mass of the matrix asphalt.
2. The novel ultraviolet aging resistant high-viscosity asphalt according to claim 1, is characterized by comprising the following raw materials: the asphalt comprises terpene resin, waste rubber powder, polyphosphoric acid, rock asphalt, matrix asphalt, hindered amine light stabilizer, stabilizer and cosolvent, wherein the terpene resin, the waste rubber powder, the polyphosphoric acid, the rock asphalt, the hindered amine light stabilizer, the stabilizer and the cosolvent respectively account for 10%, 18%, 2.5%, 10%, 1.5%, 1% and 0.5% of the mass of the matrix asphalt.
3. The novel ultraviolet aging resistant high-viscosity asphalt as claimed in claim 1, wherein the terpene resin is Jinlin brand No. T100 terpene resin.
4. The novel high-viscosity asphalt with ultraviolet aging resistance is characterized in that the rock asphalt is North American rock asphalt.
5. The novel ultraviolet aging resistant high-viscosity asphalt as claimed in claim 1, wherein the base asphalt is SK 90.
6. A method for preparing novel ultraviolet aging resistant high-viscosity asphalt, which is characterized in that the novel ultraviolet aging resistant high-viscosity asphalt based on any one of claims 1 to 5 comprises the following steps:
step 1, heating the weighed matrix asphalt until the matrix asphalt is melted, then sequentially adding the weighed waste rubber powder, polyphosphoric acid, rock asphalt, hindered amine light stabilizer, stabilizer and cosolvent, and uniformly stirring to obtain a mixture A;
step 2, heating the terpene resin, slowly adding the terpene resin into the mixture A obtained in the step 2, and uniformly stirring; obtaining a mixture B;
step 3, shearing the mixture B obtained in the step 2 at constant temperature to obtain a mixture C;
and 4, swelling and developing the mixture C obtained in the step 3 at constant temperature to obtain the novel ultraviolet aging resistant high-viscosity asphalt.
7. The method for preparing the novel high-viscosity asphalt with ultraviolet aging resistance as claimed in claim 6, wherein in step 3, the terpene resin is in a block structure.
8. The preparation method of the novel ultraviolet aging resistant high-viscosity asphalt according to claim 6, wherein in the step 4, the constant temperature shearing process parameters are as follows: shearing at 170 deg.C and 5000r/min for 45 min.
9. The method for preparing the novel ultraviolet aging resistant high-viscosity asphalt according to claim 6, wherein in the step 5, the process parameters for swelling and development at constant temperature are as follows: developing at 170 deg.C for 60 min.
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| CN112480696A (en) * | 2020-11-27 | 2021-03-12 | 长安大学 | Durable high-modulus composite modified asphalt and preparation method thereof |
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| CN101381520A (en) * | 2008-10-17 | 2009-03-11 | 广东省石油化工研究院 | Modified asphalt and preparation method thereof |
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