CN108948753B - Warm-mixed high-viscosity modified asphalt and preparation and application thereof - Google Patents
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- C—CHEMISTRY; METALLURGY
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
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- E—FIXED CONSTRUCTIONS
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- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/08—Apparatus for transporting and heating or melting asphalt, bitumen, tar, or the like
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- C—CHEMISTRY; METALLURGY
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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- C—CHEMISTRY; METALLURGY
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- 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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Abstract
The invention provides warm-mixed high-viscosity modified asphalt which is prepared from the following raw materials in parts by mass: 80-90 parts of matrix asphalt, 0-3 parts of ethylene bis stearamide, 0-2 parts of stearic acid or stearate, 0-1 part of high polymer wax, 3-8 parts of styrene-butadiene-styrene block copolymer, 0-2 parts of styrene butadiene rubber, 2-5 parts of rubber oil, 0-8 parts of colloidal particles and 0.1-0.3 part of stabilizer. The warm-mix high-viscosity modified asphalt provided by the invention reduces the production mixing temperature of the mixture without influencing the performance index, the dynamic viscosity of the warm-mix high-viscosity modified asphalt at 60 ℃ reaches more than 100000Pa & s, the brookfield viscosity at 135 ℃ is less than 2000mPa & s, the mixing temperature and the compaction temperature required by the high-viscosity asphalt mixture are reduced, the mixing temperature is reduced by about 20-30 ℃ compared with the mixing temperature of the hot-mix asphalt mixture, the fuel consumption can be reduced, the waste gas emission is reduced, and the working environment of constructors is improved.
Description
Technical Field
The invention belongs to the field of asphalt material compositions, and particularly relates to high-viscosity modified asphalt and a preparation method thereof.
Background
The water-permeable pavement of the drainage pavement, the color pavement and the sponge city asphalt pavement has higher requirements on the viscosity of asphalt materials, the high-viscosity high-elasticity modified asphalt needs higher mixing temperature and compaction temperature, and more fuel needs to be consumed in engineering application.
Chinese patent CN105585854A 'an easily constructed high viscosity modified asphalt and its preparation method' improves the high and low temperature performance of the high viscosity modified asphalt material, reduces the construction mixing temperature, but the asphalt material has relatively low dynamic viscosity and complex preparation process. Chinese patent CN102276993A 'a high-viscosity and high-toughness composite SBR modified asphalt for warm-mix asphalt technology and a preparation method thereof' discloses an alkyl condensate and SBR composite modified asphalt technology, which improves the viscosity, toughness and dynamic viscosity and Brookfield viscosity of asphalt materials. As a road construction material, high-performance asphalt having improved comprehensive properties is demanded in the market.
The high-viscosity asphalt and mineral aggregate have strong cohesiveness, the anti-stripping capability and the water damage resistance of the asphalt mixture are obviously improved, and the low-temperature flexibility is excellent and can resist low-temperature cracking and bending deformation fatigue cracks. High viscosity asphalt is widely used in drainage type road surfaces and heavy traffic road surfaces. The production and preparation processes of high-viscosity asphalt tend to be mature in China, but most of high-viscosity asphalt mixtures are produced by a hot-mixing process, and the requirements on temperature for mixing, transportation and paving are more severe due to the high viscosity of the asphalt. The temperature of the hot-mix asphalt mixture in production and mixing is usually 160-180 ℃ due to high temperature, a large amount of fuel is consumed in the heating process, and more CO is released2Waste gas such as this, reduce construction environment's quality when increasing the environmental burden, influence constructor healthy, in addition, in view of its demand to the temperature, also have the requirement to the construction season, after the autumn, ambient temperature is lower, and the construction operation that can't basically influences the construction progress.
The warm-mixed high-viscosity modified asphalt has excellent high and low temperature performance, can reduce the mixing temperature and the compaction temperature of the asphalt mixture, reduce the construction cost, prolong the construction season, meet the sustainable development strategy of China, and has wide popularization value and application prospect.
Disclosure of Invention
The invention aims to solve the technical problem of providing warm-mixing high-viscosity modified asphalt aiming at the defects in the prior art.
The invention also aims to provide a preparation method of the warm-mixed high-viscosity modified asphalt.
The third purpose of the invention is to provide a mixture containing the warm-mixed high-viscosity modified asphalt and application thereof.
The technical scheme for realizing the above purpose of the invention is as follows:
the warm-mixed high-viscosity modified asphalt is prepared from the following raw materials in parts by mass: 80-90 parts of matrix asphalt, 0-3 parts of ethylene bis stearamide, 0-2 parts of stearic acid or stearate, 0-1 part of high polymer wax, 3-8 parts of styrene-butadiene-styrene block copolymer (SBS), 0-2 parts of Styrene Butadiene Rubber (SBR), 2-5 parts of rubber oil, 0-8 parts of colloidal particles and 0.1-0.3 part of stabilizer. .
The warm-mixed high-viscosity modified asphalt is preferably prepared from the following raw materials in parts by mass: 80-90 parts of matrix asphalt, 1-3 parts of ethylene bis stearamide, 0.5-2 parts of stearic acid or stearate, 0.2-0.8 part of high polymer wax, 3-8 parts of styrene-butadiene-styrene block copolymer (SBS), 1-2 parts of Styrene Butadiene Rubber (SBR), 2-5 parts of rubber oil, 5-8 parts of rubber particles and 0.1-0.3 part of stabilizer.
Wherein the SBS graft copolymer is one or two of linear or star-shaped styrene-butadiene-styrene block copolymers obtained by graft copolymerization of SBS and monomers.
Wherein the SBR is a rubber powder substance formed by polymerizing two monomers of styrene and butadiene.
Further, the colloidal particles are obtained by activating and mechanically granulating desulfurized rubber powder.
Wherein the stabilizer is one or more of sulfur, sulfur monochloride, promoter TMTD and benzoyl peroxide.
The invention also provides a preparation method of the warm-mixed high-viscosity modified asphalt, which comprises the following steps:
the method comprises the following steps: heating the base asphalt to 140-170 ℃, adding the rubber oil into the base asphalt, stirring for 15-30 mm, heating to 170-185 ℃, adding the styrene-butadiene-styrene block copolymer SBS and/or styrene butadiene rubber SBR while shearing, and shearing for 20-40 min to obtain a mixture;
step two: other components in the warm-mixed high-viscosity modified asphalt raw material are added at the temperature of 170-185 ℃, and then the mixture develops for 3-4 h under the temperature of 170-180 ℃.
Further, the second step is: adding rubber powder particles into the mixture obtained in the first step at the temperature of 175-185 ℃ and shearing for 15-30 min, adding one or more of ethylene bis stearamide, stearic acid, stearate and high molecular wax at the temperature of 170-180 ℃, stirring for 10-20 min, slowly adding a stabilizer at the temperature of 180-185 ℃ and shearing for 10-20 min, and finally developing for 3-4 h at the temperature of 170-180 ℃.
The invention relates to a mixture containing warm-mixed high-viscosity modified asphalt.
The application of the warm-mixed high-viscosity modified asphalt mixture is widely applied to paving of permeable pavements special for sponge cities or drainage pavements and heavy-load traffic road sections under other conditions. The method is particularly applied to the paving, repairing, waterproofing and grouting treatment of expressways, bridge surface roads, stress absorbing layers, drainage pavements, airport pavements, colored pavements, sponge urban roads, steel bridge surface paving layers and the like.
The invention has the beneficial effects that:
1. the warm-mixed high-viscosity modified asphalt provided by the invention has the advantages of high viscosity, strong anti-stripping capability, good high-temperature stability, low-temperature crack resistance and aging resistance of common high-viscosity asphalt, and meanwhile, the Brookfield viscosity of the high-viscosity modified asphalt can be reduced, the mixing, transporting, paving and rolling temperatures of the mixture can be reduced, the energy consumption and the waste gas emission can be reduced, the ecological environment development can be facilitated, and the construction season can be effectively prolonged.
2. The warm-mixed high-viscosity modified asphalt provided by the invention is beneficial to reducing the construction cost, has wide popularization value, and can be widely applied to the construction of high-grade roads in China.
3. The preparation process of the modified asphalt provided by the invention has strong operability and higher cost performance.
Drawings
FIG. 1: example 1 a construction temperature map is determined from a viscosity temperature curve;
FIG. 2: example 2 determining a construction temperature map according to a viscosity temperature curve;
FIG. 3: example 3 determining a construction temperature map for a viscosity temperature curve;
FIG. 4: comparative example 1 a construction temperature map was determined for the viscosity temperature curve.
Detailed Description
The multifunctional nano drug delivery system and the performance thereof are illustrated by specific examples. The materials in the following examples were prepared directly according to prior art methods or were purchased directly from the market.
Experimental example 1
Preparation of warm-mixed high-viscosity modified asphalt
The method comprises the following steps: adding 3 parts of rubber oil into 90 parts of base asphalt (SK90#) at 150 ℃, stirring for 15min, heating to 180 ℃, and adding 6 parts of SBS (791H, Yueyang petrochemical) and 1 part of SBR while shearing for 30min at high speed to obtain a mixture;
step two: adding 2 parts of ethylene bis stearamide, 0.5 part of sodium stearate and 0.5 part of polyethylene wax (high molecular wax) into the mixture obtained in the step one at the temperature of 175 ℃, stirring for 10min, slowly adding 0.25 part of stabilizer at the temperature of 180 ℃, shearing for 10min, and finally developing for 4h at the temperature of 175 ℃.
Example 2
Preparation of warm-mixed high-viscosity modified asphalt
The method comprises the following steps: 86 parts of base asphalt (SK70#) is added with 4 parts of rubber oil at 145 ℃ and stirred for 20min, the temperature is increased to 180 ℃, and 5 parts of SBS (791H, Yueyang petrochemical) and 0.5 part of SBR are added while shearing is carried out for 30min, so as to obtain a mixture;
step two: adding 6 parts of rubber powder particles into the mixture obtained in the step one at the temperature of 180 ℃, shearing for 20min, adding 1 part of ethylene bis stearamide, 1 part of sodium stearate and 0.5 part of polyethylene wax at the temperature of 180 ℃, stirring for 15min, slowly adding 0.2 part of stabilizer at the temperature of 180 ℃, shearing for 15min, and finally developing for 3h at the temperature of 175 ℃.
In the embodiment, the colloidal particles are made of waste rubber powder, the high-molecular polymer SBS is expensive, and the high-content SBS modified asphalt is easy to glue in the production process and affects the production of the high-viscosity modified asphalt; the activated colloidal particles are used for replacing a small part of high molecular polymers, so that the cost can be reduced while the technical indexes of asphalt and a mixture are not obviously reduced, resources such as waste rubber powder and the like can be effectively utilized, the problem of environmental pollution caused by the waste rubber powder is solved, and the effect of killing two birds with one stone is achieved.
Example 3
Preparation of warm-mixed high-viscosity modified asphalt
The method comprises the following steps: adding 3 parts of rubber oil into 82 parts of matrix asphalt (Gekko Swinhonis No. 70) at 165 deg.C, stirring for 20min, heating to 180 deg.C, shearing while adding 4 parts of SBS (791H, Yueyang petrochemical) and 1 part of SBR, and high-speed shearing for 30min to obtain mixture;
step two: adding 6 parts of rubber powder particles (same as in example 2) into the mixture obtained in the step one at the temperature of 180 ℃, shearing for 20min, adding 1 part of ethylene bis stearamide, 1 part of sodium stearate and 0.5 part of polyethylene wax at the temperature of 175 ℃, stirring for 20min, slowly adding 0.2 part of stabilizer at the temperature of 180 ℃, shearing for 10min, and finally developing for 4h at the temperature of 175 ℃.
Comparative example 1
High-viscosity modified asphalt was prepared according to the preparation method of example 1, except that ethylene bis stearamide, sodium stearate, polyethylene wax and the like were not added.
The method comprises the following steps: adding 3 parts of rubber oil into 90 parts of base asphalt (SK90#) at 150 ℃, stirring for 15min, heating to 180 ℃, and adding 6 parts of SBS (791H, Yueyang petrochemical) and 1 part of SBR while shearing for 30min at high speed to obtain a mixture;
step two: slowly adding 0.25 part of stabilizer at 180 deg.C, shearing for 10min, and finally developing at 175 deg.C for 4 hr.
The warm-mixed high-viscosity modified asphalt obtained in the examples 1-3 is subjected to a conventional performance test, and the high-viscosity modified asphalt obtained in the comparative example is subjected to a conventional performance test, and the test results are shown in table 1.
The detection index definition and the detection process are executed according to the technical specification JTGF40-2004 of the construction of the asphalt pavement of the highway (published by Beijing people's traffic publisher in 2004) of the industry standard of the ministry of transportation;
TABLE 1 examples 1-3 asphalt technical index test results
The FIGURE shows the viscosity temperature curves of examples 1-3 and comparative examples.
And (3) drawing a viscosity-temperature curve according to the viscosity measured under different temperature conditions in road engineering asphalt and asphalt mixture test procedures (JTG E-20-2011), and determining the construction temperature of the mixture. The temperature when the viscosity is 0.17 Pa.S +/-0.02 Pa.S is taken as the mixing temperature range; the temperature at 0.28 Pa.S. + -. 0.023 Pa.S is used as the compaction forming temperature range.
As can be seen from FIGS. 1-4, the compaction temperature of the compound of examples 1-3 is between about 138 ℃ and 145 ℃, and the mixing temperature is between 145 ℃ and 155 ℃; comparative example 1 the mix compaction temperature was between 160 ℃ and 165 ℃ and the mix temperature was between 175 ℃ and 180 ℃. Compared with the construction temperature of the high-viscosity asphalt, the construction temperature of the warm-mixing high-viscosity asphalt mixture is obviously reduced.
The experiments show that the warm-mixed high-viscosity modified asphalt provided by the invention aiming at the hot-mixing hot-pressing production process of the high-viscosity asphalt mixture in the current market reduces the production mixing temperature of the mixture without influencing the excellent performance index of the high-viscosity asphalt, the dynamic viscosity of the warm-mixed high-viscosity modified asphalt at 60 ℃ reaches more than 100000 Pa.s, and the brookfield viscosity at 135 ℃ is less than 2000 mPa.s. The production process of the warm-mixed high-viscosity modified asphalt reduces the mixing temperature and the compaction temperature required by the high-viscosity asphalt mixture, and the mixing temperature is reduced by about 20-30 ℃ compared with the mixing temperature of the hot-mixed asphalt mixture, so that the fuel consumption can be reduced, the waste gas emission can be effectively reduced, and the operation environment of constructors can be improved.
The above examples are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
Claims (5)
1. The warm-mixed high-viscosity modified asphalt is characterized by being prepared from the following raw materials in parts by mass: 80-90 parts of matrix asphalt, 1-3 parts of ethylene bis stearamide, 0.5-2 parts of stearic acid or stearate, 0.2-0.8 part of polyethylene wax, 3-8 parts of styrene-butadiene-styrene block copolymer, 1-2 parts of styrene butadiene rubber, 2-5 parts of rubber oil, 5-8 parts of colloidal particles and 0.1-0.3 part of stabilizer;
the preparation method of the warm-mixed high-viscosity modified asphalt comprises the following steps:
the method comprises the following steps: heating the base asphalt to 140-170 ℃, adding the rubber oil into the base asphalt, stirring for 15-30 mm, heating to 170-185 ℃, adding the styrene-butadiene-styrene block copolymer SBS and the styrene butadiene rubber SBR while shearing, and shearing for 20-40 min to obtain a mixture;
adding rubber powder particles into the mixture obtained in the step one at the temperature of 175-185 ℃ and shearing for 15-30 min, adding ethylene bis stearamide, stearic acid or stearate and polyethylene wax at the temperature of 170-180 ℃, stirring for 10-20 min, slowly adding a stabilizer at the temperature of 180-185 ℃ and shearing for 10-20 min, and finally developing for 3-4 h at the temperature of 170-180 ℃.
2. The warm-mix high-viscosity modified asphalt according to claim 1, wherein the colloidal particles are obtained by activating and mechanically granulating desulfurized rubber powder.
3. The warm-mix high-viscosity modified asphalt according to claim 1, wherein the stabilizer is one or more of sulfur, sulfur monochloride, promoter TMTD, and benzoyl peroxide.
4. A mixture containing the warm-mix high-viscosity modified asphalt according to any one of claims 1 to 3.
5. The application of the warm-mixed high-viscosity modified asphalt mixture as claimed in claim 4, which is characterized in that the warm-mixed high-viscosity modified asphalt mixture is widely applied to paving of permeable pavements special for sponge cities or drainage pavements and heavy-load traffic road sections under other conditions.
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| CN109810522A (en) * | 2019-01-17 | 2019-05-28 | 南通市港闸市政开发区道路工程有限公司 | A kind of cracks with high viscous asphalt and preparation method thereof |
| CN111607239B (en) * | 2019-02-26 | 2022-08-16 | 北京路德永泰环保科技有限公司 | Cold-patch rubber asphalt mixed solution and preparation method thereof |
| CN110387130A (en) * | 2019-07-15 | 2019-10-29 | 南京科技职业学院 | A kind of preparation method of rubber powder asphalt |
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| CN112812580B (en) * | 2020-12-30 | 2022-04-29 | 中路交科科技股份有限公司 | High-viscosity high-elasticity modified asphalt for steel bridge deck and preparation method thereof |
| CN112778778A (en) * | 2020-12-31 | 2021-05-11 | 江苏亿虎沥青材料有限公司 | Safe environment-friendly high-viscosity modified asphalt and production method thereof |
| CN113278210B (en) * | 2021-05-19 | 2022-07-26 | 山东高速集团有限公司创新研究院 | Rubber-plastic alloy for modified asphalt mixture and preparation method thereof |
| CN116376300B (en) * | 2023-01-17 | 2024-09-13 | 国路高科（北京）工程技术研究院有限公司 | Warm mix asphalt modifier and preparation method thereof, warm mix asphalt and warm mix asphalt mixture |
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