CN113817333B - High-viscosity modified asphalt, preparation method thereof and OGFC (one glass batch fiber reinforced plastic) asphalt mixture - Google Patents
High-viscosity modified asphalt, preparation method thereof and OGFC (one glass batch fiber reinforced plastic) asphalt mixture Download PDFInfo
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- CN113817333B CN113817333B CN202111307056.8A CN202111307056A CN113817333B CN 113817333 B CN113817333 B CN 113817333B CN 202111307056 A CN202111307056 A CN 202111307056A CN 113817333 B CN113817333 B CN 113817333B
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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
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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Abstract
The invention discloses high-viscosity modified asphalt and a preparation method thereof, wherein the high-viscosity modified asphalt comprises the following components in percentage by weight: 2 to 3 percent of styrene-butadiene-styrene copolymer; ethylene-octene copolymer 4%; 10-20% of waste tire rubber powder, 2-6% of aromatic oil, 0.5-2% of sulfur, 1-5% of rosin pentaerythritol ester and the balance of No. 70 matrix asphalt. The invention also discloses an OGFC asphalt mixture containing the asphalt. The modified asphalt has higher viscosity and strong cohesive force with large-gap mineral aggregate, an asphalt film is not easy to fall off from the surface of the mineral aggregate, and the prepared OGFC asphalt mixture is suitable for paving the upper surface layer of a pavement in high-temperature and rainy areas in south China, has better mechanical strength and durability, can quickly drain water under the condition of heavy rainfall and has good water stability.
Description
Technical Field
The invention relates to the technical field of highway engineering, in particular to high-viscosity modified asphalt, a preparation method thereof and an OGFC asphalt mixture.
Background
In recent years, in many damp and hot areas in the south of China, local rainfall may exceed the average annual value sometimes, and a large amount of rainfall causes accumulated water and water mist on the road surface, so that the skid resistance and the durability of the road surface are reduced, and the structure of the road surface is damaged. The traditional dense-graded asphalt pavement cannot drain accumulated water on the pavement in time after rainfall so that the pavement forms a water film and the skid resistance of the pavement is reduced; on the other hand, high temperature is a severe test for the pavement, and the traditional asphalt pavement generally has the problem of insufficient high-temperature stability, so that the pavement cannot reach the designed service life. The drainage pavement with the large-gap graded wearing layer (OGFC) can improve the anti-skid performance and the noise reduction performance of the pavement, and obviously improve the driving safety and the comfort of the pavement.
The OGFC drainage pavement is an open-graded asphalt pavement with a basic structure of skeleton void type and an internal communicated void ratio, and is a stable pavement under the action of mutual embedding and extrusion among large-particle-size aggregates, wherein the small amount of fine aggregates enable the interior of the pavement to form larger voids, and the voids of a common mixture can reach 18-25%. Aiming at the OGFC mixture design in the damp and hot area of China, a complete and unified design method is not available at present, so that the popularization and the use of the OGFC mixture have many problems and limitations. The asphalt material of the OGFC mixture has good high-temperature performance and bonding capacity, and the 60 ℃ viscosity of the common high-viscosity modified asphalt is not enough to meet the actual condition of the OGFC pavement in the area; on the other hand, the porosity of the traditional dense-graded asphalt mixture can only reach 3% -6%, the good drainage performance of the pavement can not be achieved, and the structural damage of the pavement is easily caused due to the insufficient high-temperature stability.
Disclosure of Invention
The invention aims to provide high-viscosity modified asphalt with better high-temperature performance and bonding capacity, a preparation method thereof and an OGFC (one glass solution fiber reinforced thermoplastic) asphalt mixture which is prepared from the high-viscosity modified asphalt and can adapt to hot and humid areas.
The technical scheme provided by the invention is that the high-viscosity modified asphalt comprises the following components in percentage by weight: 2 to 3 percent of styrene-butadiene-styrene copolymer (SBS); 3-5% of ethylene-octene copolymer (POE); 10-20% of waste tire rubber powder, 2-6% of aromatic oil, 0.5-2% of sulfur, 1-5% of rosin pentaerythritol ester and the balance of No. 70 matrix asphalt.
The styrene-butadiene-styrene copolymer (SBS) is star-shaped, and the molecular weight is 14-30 ten thousand. The larger the molecular weight, the higher the viscosity. However, when the amount of SBS is too large, the shearing difficulty is increased, and the construction is more difficult.
The waste tire rubber powder can effectively improve the viscosity of asphalt, and when the using amount of the waste tire rubber powder is less than 10 parts by weight, the viscosity of the asphalt at 60 ℃ cannot be improved; when the amount of the used tire rubber powder is more than 20 parts by weight, the viscosity of the asphalt is too large and the dispersibility and storage property are deteriorated.
The aromatic oil contains a large amount of aromatic hydrocarbon and colloid, has high flash point and good high temperature resistance, can effectively improve the compatibility of SBS and waste tire rubber powder, and improves ductility to a certain extent.
The sulfur is a stabilizer, and can enable SBS molecular chains and functional groups of the asphalt to be mutually crosslinked, so that SBS can be stably existed in the asphalt, and the storage stability of the asphalt is improved.
The technical parameters of the No. 70 matrix asphalt are as follows:
preferably, the weight percentage of each component is as follows: 2.5% of styrene-butadiene-styrene copolymer; 4% of an ethylene-octene copolymer; 15% of waste tire rubber powder, 4% of aromatic oil, 1% of sulfur, 2% of rosin pentaerythritol ester and 71.5% of No. 70 matrix asphalt.
The invention also provides a preparation method of the high-viscosity modified asphalt, which comprises the following steps:
1) Weighing the raw materials according to the proportion for later use;
2) Heating the No. 70 matrix asphalt to 160-170 ℃, adding SBS, POE and aromatic oil under the stirring condition, and developing for 1h at 160-170 ℃; then shearing the mixture at high speed for 30min at 175-185 ℃ and 4000r/min to obtain an asphalt mixture
3) Slowly adding waste tire rubber powder and rosin pentaerythritol ester into the asphalt mixture, shearing at high speed for 30min at 175-185 ℃ and 4000r/min, then adding sulfur, and continuously shearing at high speed for 10min at 175-185 ℃ and 4000r/min to obtain the high-viscosity modified asphalt.
The invention also provides an asphalt mixture prepared by mixing mineral aggregate and the high-viscosity modified asphalt of claim 1 or 2.
The high-viscosity modified asphalt accounts for 3.4-5.4% of the weight of the asphalt mixture.
The passing rate of the mineral aggregate in a 2.36mm sieve hole is 13.2-17.9%.
The weight mixing amount of aggregate with the grain diameter of 1.18-2.36 mm in the mineral aggregate is 3.2-3.6%.
The passing rate of the mineral aggregate in a sieve pore of 0.075mm is 3-4%.
Further, the grading range of the mineral aggregate is as follows:
the mineral aggregate grading can ensure large porosity, high framework strength and enough porosity and drainage capacity of aggregate.
Compared with the prior art, the invention has the following beneficial effects:
1) The modified asphalt has higher viscosity and strong cohesive force with large-gap mineral aggregate, an asphalt film is not easy to fall off from the surface of the mineral aggregate, and the upper surface of a pavement paved by the asphalt mixture has better mechanical strength and durability.
2) The asphalt mixture is suitable for paving the upper surface layer of a pavement in a southern high-temperature rainy region, and has high porosity and good anti-rutting capability. Can quickly drain water under the condition of heavy rainfall and has good water stability.
Detailed Description
The following examples further illustrate the invention but are not intended to limit it.
Example 1
1) Preparing raw materials according to the following weight ratio: 2% of SBS; 4% of POE; 12% of waste tire rubber powder, 2% of aromatic oil, 1% of sulfur, 1% of rosin pentaerythritol ester and 78% of No. 70 matrix asphalt.
2) Heating No. 70 matrix asphalt to 160 ℃, slowly adding SBS, POE and aromatic oil while stirring by using a glass rod, and developing for 1h at 160 ℃; then shearing at high speed at 175 ℃ and 4000r/min for 30min to obtain the asphalt mixture.
3) Slowly adding waste tire rubber powder and rosin pentaerythritol ester into the asphalt mixture, shearing at high speed for 30min at 175 ℃ and 4000r/min, then adding sulfur, and continuously shearing at high speed for 10min at 175 ℃ and 4000r/min to obtain the high-viscosity modified asphalt.
4) Preparing an OGFC asphalt mixture according to the following weight percentages: 3.4 percent of high-viscosity modified asphalt and 96.6 percent of mineral aggregate.
The mineral aggregate gradation is as follows:
example 2
1) Preparing raw materials according to the following weight ratio: SBS 3 percent; 4% of POE; 15% of waste tire rubber powder, 6% of aromatic oil, 1% of sulfur, 5% of rosin pentaerythritol ester and 66% of No. 70 base asphalt.
2) Heating the No. 70 matrix asphalt to 170 ℃, slowly adding SBS, POE and aromatic oil while stirring by a glass rod, and developing for 1h at 170 ℃; then shearing at 185 deg.C and 4000r/min for 30min to obtain asphalt mixture.
3) Slowly adding waste tire rubber powder and rosin pentaerythritol ester into the asphalt mixture, shearing at 185 ℃ and 4000r/min at a high speed for 30min, then adding sulfur, and continuously shearing at 185 ℃ and 4000r/min at a high speed for 10min to obtain the high-viscosity modified asphalt.
4) Preparing an OGFC asphalt mixture according to the following weight percentage: 5.4 percent of high-viscosity modified asphalt and 94.6 percent of mineral aggregate.
The mineral aggregate gradation is as follows:
example 3
1) Preparing raw materials according to the following weight ratio: 2.5 percent of SBS; 4% of POE; 15% of waste tire rubber powder, 4% of aromatic oil, 1% of sulfur, 3% of rosin pentaerythritol ester and 70# matrix asphalt.
2) Heating No. 70 matrix asphalt to 165 ℃, slowly adding SBS, POE and aromatic oil while stirring by using a glass rod, and developing for 1h at 165 ℃; then shearing at high speed for 30min at 180 ℃ and 4000r/min to obtain the asphalt mixture.
3) Slowly adding waste tire rubber powder and rosin pentaerythritol ester into the asphalt mixture, shearing at high speed for 30min at 180 ℃ and 4000r/min, then adding sulfur, and continuously shearing at high speed for 10min at 180 ℃ and 4000r/min to obtain the high-viscosity modified asphalt.
4) Preparing an OGFC asphalt mixture according to the following weight percentages: 4.5 percent of high-viscosity modified asphalt and 95.5 percent of mineral aggregate.
The mineral aggregate gradation is as follows:
example 4
1) Preparing raw materials according to the following weight ratio: 2% of SBS; 4% of POE; 15% of waste tire rubber powder, 2% of aromatic oil, 1% of sulfur, 1% of rosin pentaerythritol ester and 75% of No. 70 matrix asphalt.
2) Heating the No. 70 matrix asphalt to 160 ℃, slowly adding SBS, POE and aromatic oil while stirring by a glass rod, and developing for 1h at 170 ℃; then shearing at high speed at 175 ℃ and 4000r/min for 30min to obtain the asphalt mixture.
3) Slowly adding waste tire rubber powder and rosin pentaerythritol ester into the asphalt mixture, shearing at 185 ℃ and 4000r/min for 30min at a high speed, then adding sulfur, and continuously shearing at 185 ℃ and 4000r/min for 10min at a high speed to obtain the high-viscosity modified asphalt.
4) Preparing an OGFC asphalt mixture according to the following weight percentages: 5.1 percent of high-viscosity modified asphalt and 94.9 percent of mineral aggregate.
The mineral aggregate gradation is as follows:
the technical indexes of the high-viscosity modified asphalt prepared in examples 1 to 4 were tested, and the test results are shown in table 1 below:
the related technical indexes of the OGFC asphalt mixtures prepared in examples 1 to 4 were tested, and the test results are shown in table 2 below:
Claims (8)
1. a high viscosity modified asphalt is characterized in that: comprises the following components in percentage by weight: 2 to 3 percent of SBS; 3-5% of POE; 10-20% of waste tire rubber powder, 2-6% of aromatic oil, 0.5-2% of sulfur, 1-5% of rosin pentaerythritol ester and the balance of No. 70 matrix asphalt;
the SBS is star-shaped and has the molecular weight of 14-30 ten thousand.
2. The high viscosity modified asphalt of claim 1, wherein: the weight percentage of each component is as follows: 2.5 percent of SBS; 4% of POE; 15% of waste tire rubber powder, 4% of aromatic oil, 1% of sulfur, 3% of rosin pentaerythritol ester and 70# matrix asphalt 70.5%.
3. The process for producing high viscosity modified asphalt according to claim 1 or 2, wherein: the method comprises the following steps:
1) Weighing the raw materials according to the proportion for later use;
2) Heating the No. 70 matrix asphalt to 160-170 ℃, adding SBS, POE and aromatic oil under the stirring condition, and developing for 1h at 160-170 ℃; then shearing at high speed for 30min at 175-185 ℃ and 4000r/min to obtain an asphalt mixture
3) Slowly adding waste tire rubber powder and rosin pentaerythritol ester into the asphalt mixture, shearing at high speed for 30min at 175-185 ℃ and 4000r/min, then adding sulfur, and continuously shearing at high speed for 10min at 175-185 ℃ and 4000r/min to obtain the high-viscosity modified asphalt.
4. An OGFC asphalt mixture is characterized in that: is prepared by mixing mineral aggregates with the high-viscosity modified asphalt of claim 1 or 2.
5. The OGFC asphalt mix according to claim 4, wherein: the weight content of the high-viscosity modified asphalt in the OGFC asphalt mixture is 3.4-5.4%.
6. The OGFC asphalt mix according to claim 4, wherein: the passing rate of the mineral aggregate in a sieve pore of 0.075mm is 3-4%.
7. The OGFC asphalt mix according to claim 4, wherein: the weight content of the 1.18-2.36 m grain diameter in the mineral aggregate is 3.2-3.6%.
8. The OGFC asphalt mix according to claim 4, wherein: the passing rate of the mineral aggregate in a 2.36mm sieve pore is 13.2-17.9%.
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| BE787079A (en) * | 1971-08-03 | 1973-02-02 | Polymer Corp | CURING LIQUID COMPOSITION AND ITS APPLICATIONS TO COATING SURFACES |
| DE2449491B2 (en) * | 1974-10-19 | 1979-09-20 | Chemische Werke Huels Ag, 4370 Marl | Process for the production of homogeneous strip or granular thermoplastic masses based on polymers and bitumen |
| DE2657273A1 (en) * | 1976-12-17 | 1978-06-22 | Huels Chemische Werke Ag | THERMOPLASTIC MASS |
| EP0548412A1 (en) * | 1991-12-20 | 1993-06-30 | Poly Invest Sa | Modified bitumen usable within a wide temperature range, and process for preparing it |
| JP2006131861A (en) * | 2004-10-06 | 2006-05-25 | Hikari Kogyo Kk | Impermeable asphalt pavement material |
| US20100227954A1 (en) * | 2009-03-08 | 2010-09-09 | Asphalt & Wax Innovations, LLC. | Asphalt modifiers, methods of modifying asphalt, asphalt compositions and methods of making |
| CN101775223B (en) * | 2009-12-24 | 2011-08-17 | 交通部公路科学研究所 | Additive for drainage asphalt mixture of high temperature heavy load road and preparation method thereof |
| KR101043032B1 (en) * | 2010-10-07 | 2011-06-21 | 주식회사 누보켐 | Manufacturing method of asphalt modifier and modified asphalt, modified asphalt concrete thereof |
| CN102268188B (en) * | 2011-05-27 | 2012-11-21 | 江苏博特新材料有限公司 | High viscosity asphalt additive, and preparation method and application thereof |
| CN106700572A (en) * | 2015-11-13 | 2017-05-24 | 山东建筑大学 | Long-life POE-SBS composite modified asphalt and preparation method thereof |
| CN107118574A (en) * | 2017-01-16 | 2017-09-01 | 深圳市天之泰道路材料有限公司 | A kind of graininess asphalt modifier with high viscosity and preparation method thereof |
| CN107974091A (en) * | 2017-09-29 | 2018-05-01 | 天津海泰环保科技发展股份有限公司 | A kind of noise reduction drainage pavement high viscose glue powder modified asphalt material and preparation method thereof |
| CN108504115B (en) * | 2018-04-20 | 2020-08-25 | 河海大学 | Special high-viscosity modified asphalt for drainage pavement and preparation method thereof |
| CN110041720A (en) * | 2019-05-07 | 2019-07-23 | 无锡市城市道桥科技有限公司 | A kind of high adhered modification asphalt material and preparation method thereof |
| CN111471311A (en) * | 2020-05-26 | 2020-07-31 | 西安永和科技有限公司 | Light energy phase change asphalt modifier and preparation method thereof |
| CN111961344B (en) * | 2020-08-13 | 2021-11-30 | 长安大学 | High-viscosity asphalt modifier, high-viscosity modified asphalt and preparation method |
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