CN115304841A - Pretreatment rubber powder for high-volume rubber modified asphalt and preparation method thereof - Google Patents
Pretreatment rubber powder for high-volume rubber modified asphalt and preparation method thereof Download PDFInfo
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- 239000010426 asphalt Substances 0.000 title claims abstract description 133
- 239000000843 powder Substances 0.000 title claims abstract description 131
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 230000003213 activating effect Effects 0.000 claims abstract description 30
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 30
- 238000002203 pretreatment Methods 0.000 claims abstract description 20
- 238000002156 mixing Methods 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims abstract description 12
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims abstract description 12
- 239000006229 carbon black Substances 0.000 claims abstract description 12
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims abstract description 12
- 230000003009 desulfurizing effect Effects 0.000 claims description 19
- 238000003756 stirring Methods 0.000 claims description 19
- 239000003921 oil Substances 0.000 claims description 14
- 235000019198 oils Nutrition 0.000 claims description 14
- 239000000853 adhesive Substances 0.000 claims description 13
- 230000001070 adhesive effect Effects 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 12
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 11
- 229910052791 calcium Inorganic materials 0.000 claims description 11
- 239000011575 calcium Substances 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 8
- 238000006477 desulfuration reaction Methods 0.000 claims description 8
- 230000023556 desulfurization Effects 0.000 claims description 8
- 239000003549 soybean oil Substances 0.000 claims description 8
- 235000012424 soybean oil Nutrition 0.000 claims description 8
- 238000003892 spreading Methods 0.000 claims description 8
- 230000007480 spreading Effects 0.000 claims description 8
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- 239000010920 waste tyre Substances 0.000 claims description 5
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 claims description 3
- 235000019482 Palm oil Nutrition 0.000 claims description 3
- 239000010692 aromatic oil Substances 0.000 claims description 3
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 239000003245 coal Substances 0.000 claims description 3
- 239000011280 coal tar Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000002540 palm oil Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 239000011435 rock Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 5
- 238000003860 storage Methods 0.000 abstract description 3
- 238000011161 development Methods 0.000 abstract description 2
- 238000010008 shearing Methods 0.000 description 21
- 239000011159 matrix material Substances 0.000 description 17
- 238000006243 chemical reaction Methods 0.000 description 15
- 239000003208 petroleum Substances 0.000 description 12
- 238000000227 grinding Methods 0.000 description 11
- 239000000084 colloidal system Substances 0.000 description 10
- 238000005086 pumping Methods 0.000 description 10
- 239000003381 stabilizer Substances 0.000 description 10
- 238000005303 weighing Methods 0.000 description 10
- 230000035515 penetration Effects 0.000 description 7
- 238000005054 agglomeration Methods 0.000 description 5
- 230000002776 aggregation Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 230000008961 swelling Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005204 segregation Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000003981 vehicle Substances 0.000 description 1
Classifications
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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
- C08L19/00—Compositions of rubbers not provided for in groups C08L7/00 - C08L17/00
- C08L19/003—Precrosslinked rubber; Scrap rubber; Used vulcanised rubber
-
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention belongs to the field of road engineering, and particularly relates to pretreatment rubber powder for high-volume rubber modified asphalt and a preparation method thereof. The pretreatment rubber powder comprises the following components in parts by weight: 100 parts of rubber powder, 15-25 parts of asphalt, 3-5 parts of softening oil, 0.1-0.2 part of activating agent, 3-5 parts of rosin, 8-10 parts of carbon black and 5 parts of water. The method has the advantages that: (1) The pretreatment rubber powder for roads can be prepared, the mixing amount of the pretreatment rubber powder can reach up to 100 parts, and a large amount of waste rubber powder can be recycled. (2) The pre-treatment of the rubber powder shortens the preparation of the modified asphalt by more than 3 hours and shortens the development time. (3) The high-volume rubber powder modified asphalt prepared by the pretreatment rubber powder provided by the invention can improve the storage stability of the modified asphalt. (4) The viscosity of the high-volume rubber powder modified asphalt prepared by the pre-treatment rubber powder provided by the invention is 1.5-3.5 Pa.S, and is within a reasonable range.
Description
Technical Field
The invention belongs to the field of road engineering, and particularly relates to pretreatment rubber powder for high-volume rubber modified asphalt and a preparation method thereof.
Background
In recent years, the transportation industry in various parts of China is rapidly developed, vehicles are large, the phenomena of overweight and overload are more and more serious, and the requirements of the conditions on the high-temperature stability, the low-temperature crack resistance, the aging resistance, the durability and the like of a road surface are higher and higher.
Although the traditional rubber asphalt technology can improve the road use performance of domestic asphalt to a certain extent, the traditional rubber asphalt technology has the defects of easy aging in high-temperature processing, poor high-temperature storage stability, easy generation of segregation and precipitation and the like, and can not well meet the use requirements of modern pavements.
The waste rubber powder is used as an asphalt modifier in road construction, and is an effective method for utilizing the waste tire rubber powder. The waste tire rubber powder is used as a modifier, so that the temperature sensitivity of the asphalt can be obviously improved, and various indexes of the modified asphalt are improved.
Compared with matrix asphalt, the waste rubber modified asphalt can obviously improve the performances of rutting resistance, high-temperature performance, reflection crack, fatigue crack, water stability and the like of the pavement, thereby prolonging the service life of the pavement. Meanwhile, as petroleum is a non-renewable resource, the price of the petroleum is rising all the time in recent years, the price of the asphalt is also rising, and the rubber powder has rich sources and low price.
On the premise of ensuring the performance of the rubber modified asphalt, the use amount of the rubber powder is increased, so that the cost can be reduced, the utilization rate of the rubber powder can be increased, and social benefits and environmental protection benefits can be brought.
Disclosure of Invention
The invention aims to provide the pre-treatment rubber powder for the high-mixing-amount rubber modified asphalt and the preparation method thereof, wherein the pre-treatment rubber powder has the advantages of simple production process, high production efficiency, short time, low cost and large mixing amount.
In order to achieve the purpose, the invention adopts the technical scheme that:
the pretreatment rubber powder for the high-volume rubber modified asphalt comprises the following components in parts by weight: 100 parts of rubber powder, 15-25 parts of asphalt, 3-5 parts of softening oil, 0.1-0.2 part of activating agent, 3-5 parts of rosin, 8-10 parts of carbon black and 5 parts of water.
Furthermore, the rubber powder is waste tire rubber powder, and the particle size is 20-30 meshes.
Further, the activating agent is one or a mixture of any several of an activating agent 980, an activating agent 580, an activating agent 480, an activating agent 420 and an activating agent 950.
Further, the softening oil is one or a mixture of any more of palm oil, aromatic oil, dioctyl phthalate, epoxidized soybean oil and coal tar.
Further, the asphalt is one or a mixture of any several of low-grade asphalt, hard asphalt, rock asphalt and coal asphalt.
The invention also provides a preparation method of the pretreatment rubber powder for the high-volume rubber modified asphalt.
A preparation method of pre-treatment rubber powder for high-volume rubber modified asphalt comprises the following steps:
(1) Adding rubber powder into a devulcanizer according to the weight of the formula;
(2) Mixing: adding asphalt, softening oil, an activating agent, rosin, carbon black and water into a desulfurizing tank according to the weight of the formula, and uniformly stirring;
(3) Desulfurizing for 40-60 min in a desulfurizing tank under high temperature and high pressure conditions;
(4) Cooling after the desulfurization is finished;
(6) And spreading calcium powder on the cooled material to obtain the pre-treatment adhesive powder.
Furthermore, the desulfurization condition is that the temperature is 250-280 ℃ and the pressure is 18.5-22.5 Mpa.
Further, the calcium powder is light calcium carbonate.
The invention also provides application of the pretreatment rubber powder for the high-volume rubber modified asphalt.
A pre-treating rubber powder for the high-content rubber modified asphalt used for road is disclosed.
The invention provides a pretreatment rubber powder for high-volume rubber modified asphalt, which is characterized in that the rubber powder is pretreated in a dynamic desulfurization mode to ensure that the rubber powder is in an active state before being added into the asphalt, and the high-volume rubber modified asphalt which has various indexes meeting road standards and can be stably stored is successfully prepared through a simple process, and the highest mixing amount of the rubber powder can reach 100 parts (namely 50% of internal mixing).
The pretreatment rubber powder for the high-volume rubber modified asphalt provided by the invention enables the rubber powder to be in an active state in a dynamic desulfurization mode, and the rubber powder and the matrix asphalt in the state have better compatibility. Meanwhile, the pretreatment rubber powder prepared by the method can realize the preparation of the high-doped rubber modified asphalt through simple processes such as high-temperature stirring, shearing and grinding, and the like, and the method controls the 180-DEG C rotational viscosity of the modified asphalt within a reasonable range (1.5-3.5 Pa.S) without influencing the construction. The method can recycle a large amount of waste rubber powder, has high production efficiency, and the prepared rubber modified asphalt has excellent performances and is very suitable for industrial production.
The invention provides a pretreatment rubber powder for high-volume rubber modified asphalt, which is characterized in that a high-temperature devulcanizer is adopted to pretreat rubber powder, the pretreatment rubber powder is controlled within a reasonable range for roads to use by optimizing a formula, the rubber powder volume can be obviously increased by adopting the technology, and various performances of the high-volume rubber modified asphalt are improved to a certain extent.
Compared with the prior art, the pretreatment rubber powder for the high-volume rubber modified asphalt and the preparation method thereof have the advantages that:
(1) The pre-treatment rubber powder for roads can be prepared, the mixing amount of the pre-treatment rubber powder can reach up to 100 parts, namely 50 percent of the pre-treatment rubber powder is internally mixed, and a large amount of waste rubber powder can be recycled.
(2) The pre-treatment of the rubber powder shortens the preparation of the modified asphalt by more than 3 hours and shortens the development time.
(3) The high-volume rubber modified asphalt prepared by the pretreatment rubber powder provided by the invention can improve the storage stability.
(4) The viscosity of the high-volume rubber modified asphalt prepared by the pretreatment rubber powder provided by the invention is 1.5-3.5 Pa.S, and is within a reasonable range.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following examples further describe the present invention in detail, and the following examples are only used for illustrating the present invention, but not for limiting the scope of the present invention.
The pretreatment rubber powder for the large-doped rubber modified asphalt comprises the following components in parts by weight: 100 parts of rubber powder, 15-25 parts of asphalt, 3-5 parts of softening oil, 0.1-0.2 part of activating agent, 3-5 parts of rosin, 8-10 parts of carbon black and 5 parts of water.
Furthermore, the rubber powder is waste tire rubber powder, and the particle size is 20-30 meshes.
Further, the activating agent is one or a mixture of any several of an activating agent 980, an activating agent 580, an activating agent 480, an activating agent 420 and an activating agent 950.
Further, the softening oil is one or a mixture of any more of palm oil, aromatic oil, dioctyl phthalate, epoxidized soybean oil and coal tar.
Further, the asphalt is one or a mixture of any several of low-grade asphalt, hard asphalt, rock asphalt and coal asphalt.
The invention also provides a preparation method of the pretreatment rubber powder for the high-volume rubber modified asphalt.
A preparation method of pre-treatment rubber powder for high-volume rubber modified asphalt comprises the following steps:
(1) Adding rubber powder into a devulcanizer according to the weight of the formula;
(2) Mixing: adding asphalt, softening oil, an activating agent, rosin, carbon black and water into a desulfurizing tank according to the weight of the formula, and uniformly stirring;
(3) Desulfurizing for 40-60 min in a desulfurizing tank under high temperature and high pressure conditions;
(4) Cooling after the desulfurization is finished;
(6) And spreading calcium powder on the cooled material to obtain the pretreatment adhesive powder.
Furthermore, the desulfurization condition is that the temperature is 250-280 ℃ and the pressure is 18.5-22.5 Mpa.
Further, the calcium powder is nano-grade light calcium carbonate.
The invention also provides application of the pre-treatment rubber powder for the high-volume rubber modified asphalt.
A pre-treating rubber powder for the high-content rubber modified asphalt used for road is disclosed.
Example 1
Weighing the components of the pretreatment rubber powder composition according to the weight: 100 parts of rubber powder, 15 parts of asphalt (hard asphalt), 5 parts of softening oil (epoxidized soybean oil), 0.2 part of activating agent (480), 3 parts of rosin, 8 parts of carbon black and 5 parts of water.
(1) Adding the rubber powder and various auxiliaries thereof into a devulcanizer, and uniformly stirring;
(2) Pressurizing the desulfurizing tank to 18.5-22.5 MPa and controlling the temperature to 250-280 ℃;
(3) Desulfurizing for 40min;
(4) Cooling the desulfurized rubber powder;
(5) And (3) properly spreading calcium powder on the cooled pretreatment adhesive powder to prevent agglomeration, thus obtaining the pretreatment adhesive powder.
Example 2
Weighing the components of the pretreatment rubber powder composition according to the weight: 100 parts of rubber powder, 18 parts of asphalt (hard asphalt), 5 parts of softening oil (epoxidized soybean oil), 0.2 part of activating agent (480), 3 parts of rosin, 8 parts of carbon black and 5 parts of water.
(1) Adding the rubber powder and various auxiliaries thereof into a devulcanizer, and uniformly stirring;
(2) Pressurizing the desulfurizing tank at 18.5-22.5 MPa and controlling the temperature at 250-280 deg.c;
(3) Desulfurizing for 60min;
(4) Cooling the desulfurized rubber powder;
(5) And (3) properly spreading calcium powder on the cooled pretreatment adhesive powder to prevent agglomeration, thus obtaining the pretreatment adhesive powder.
Example 3
Weighing the components of the pretreatment rubber powder composition according to the weight: 100 parts of rubber powder, 20 parts of asphalt (hard asphalt), 4 parts of softening oil (epoxidized soybean oil), 0.2 part of activating agent (480), 4 parts of rosin, 9 parts of carbon black and 5 parts of water.
(1) Adding the rubber powder and various auxiliaries thereof into a devulcanizer, and uniformly stirring;
(2) Pressurizing the desulfurizing tank to 18.5-22.5 MPa and controlling the temperature to 250-280 ℃;
(3) Desulfurizing for 50min;
(4) Cooling the desulfurized rubber powder;
(5) And (3) properly spreading light calcium powder on the cooled pretreatment adhesive powder to prevent agglomeration, thus obtaining the pretreatment adhesive powder.
Example 4
Weighing the components of the pretreatment rubber powder composition according to the weight: 100 parts of rubber powder, 23 parts of asphalt (hard asphalt), 4 parts of softening oil (epoxidized soybean oil), 0.1 part of activating agent (480), 5 parts of rosin, 9 parts of carbon black and 5 parts of water.
(1) Adding the rubber powder and various auxiliaries thereof into a devulcanizer, and uniformly stirring;
(2) Pressurizing the desulfurizing tank to 18.5-22.5 MPa and controlling the temperature to 250-280 ℃;
(3) Desulfurizing for 40min;
(4) Cooling the desulfurized rubber powder;
(5) And (3) properly spreading calcium powder on the cooled pretreatment adhesive powder to prevent agglomeration, thus obtaining the pretreatment adhesive powder.
Example 5
Weighing the components of the pretreatment rubber powder composition according to the weight: 100 parts of rubber powder, 25 parts of asphalt (hard asphalt), 3 parts of softening oil (epoxidized soybean oil), 0.1 part of activating agent (480), 5 parts of rosin, 10 parts of carbon black and 5 parts of water.
(1) Adding the rubber powder and various auxiliaries thereof into a devulcanizer, and uniformly stirring;
(2) Pressurizing the desulfurizing tank to 18.5-22.5 MPa and controlling the temperature to 250-280 ℃;
(3) Desulfurizing for 50min;
(4) Cooling the desulfurized rubber powder;
(5) And (3) properly spreading calcium powder on the cooled pretreatment adhesive powder to prevent agglomeration, thus obtaining the pretreatment adhesive powder.
The pre-treatment rubber powder manufactured by the scheme of the embodiment 1-5 can be used as high-mixing-amount rubber modified asphalt for roads, and the specific embodiment is as follows:
example 6
The selected matrix asphalt is medium petroleum No. 70 asphalt, the three indexes are penetration degree 71 (0.1 mm), softening point 48.8 ℃, and ductility 46cm at 10 ℃.
Weighing the following components in parts by weight: 100 parts of No. 70 road petroleum asphalt, 50 parts of pretreatment rubber powder, 0.5 part of stabilizer and 3 parts of SBS.
(1) Heating the matrix asphalt to 180 ℃, and then conveying the matrix asphalt to a reaction kettle;
(2) Adding SBS into the reaction kettle and stirring evenly;
(3) Adding the rubber powder into a reaction kettle, mixing and stirring, controlling the temperature at 185 ℃, and swelling for 30min;
(4) Pumping the asphalt to a high-power colloid mill for strong shearing and grinding for 5min;
(5) Adding a stabilizer into the modified asphalt after strong shearing;
(6) And pumping the asphalt to a colloid mill for weak shearing grinding, and shearing for 5min to obtain the finished product of the rubber modified asphalt with large mixing amount.
Example 7
The selected matrix asphalt is medium petroleum No. 70 asphalt, the three indexes are penetration degree 71 (0.1 mm), softening point 48.8 ℃, and ductility 46cm at 10 ℃.
Weighing the following components in parts by weight: 100 parts of No. 70 road petroleum asphalt, 60 parts of pretreatment rubber powder, 0.5 part of stabilizer and 2 parts of SBS.
(1) Heating the matrix asphalt to 180 ℃, and then conveying the matrix asphalt to a reaction kettle;
(2) Adding SBS into the reaction kettle and stirring evenly;
(3) Adding the rubber powder into a reaction kettle, mixing and stirring, controlling the temperature at 185 ℃, and swelling for 30min;
(4) Pumping the asphalt to a high-power colloid mill for strong shearing and grinding for 5min;
(5) Adding a stabilizer into the modified asphalt after strong shearing;
(6) And pumping the asphalt to a colloid mill for weak shearing grinding, and shearing for 5min to obtain the finished product of the rubber modified asphalt with large mixing amount.
Example 8
The selected matrix asphalt is medium petroleum No. 70 asphalt, the three indexes are penetration degree 71 (0.1 mm), softening point 48.8 ℃, and ductility 46cm at 10 ℃.
Weighing the following components in parts by weight: 100 parts of No. 70 road petroleum asphalt, 70 parts of pretreatment rubber powder, 0.5 part of stabilizer and 2 parts of SBS.
(1) Heating the matrix asphalt to 180 ℃, and then conveying the matrix asphalt to a reaction kettle;
(2) Adding SBS into the reaction kettle and stirring evenly;
(3) Adding the rubber powder into a reaction kettle, mixing and stirring, controlling the temperature at 185 ℃, and swelling for 30min;
(4) Pumping the asphalt to a high-power colloid mill for strong shearing and grinding for 5min;
(5) Adding a stabilizer into the modified asphalt after strong shearing;
(6) And pumping the asphalt to a colloid mill for weak shearing grinding, and shearing for 5min to obtain the finished product of the rubber modified asphalt with large mixing amount.
Example 9
The selected matrix asphalt is medium petroleum No. 70 asphalt, the three indexes are penetration degree 71 (0.1 mm), softening point 48.8 ℃, and ductility 46cm at 10 ℃.
Weighing the following components in parts by weight: 100 parts of No. 70 road petroleum asphalt, 80 parts of pretreatment rubber powder, 0.5 part of stabilizer and 1 part of SBS.
(1) Heating the matrix asphalt to 180 ℃, and then conveying the matrix asphalt to a reaction kettle;
(2) Adding SBS into the reaction kettle and stirring evenly;
(3) Adding the rubber powder into a reaction kettle, mixing and stirring, controlling the temperature at 185 ℃, and swelling for 30min;
(4) Pumping the asphalt to a high-power colloid mill for strong shearing and grinding for 5min;
(5) Adding a stabilizer into the modified asphalt after strong shearing;
(6) And pumping the asphalt to a colloid mill for weak shearing grinding, and shearing for 5min to obtain the finished product of the rubber modified asphalt with large mixing amount.
Example 10
The selected matrix asphalt is medium petroleum No. 70 asphalt, the three indexes are penetration degree 71 (0.1 mm), softening point 48.8 ℃, and ductility 46cm at 10 ℃.
Weighing the following components in parts by weight: 100 parts of No. 70 road petroleum asphalt, 90 parts of pretreatment rubber powder, 0.5 part of stabilizer and 1 part of SBS.
(1) Heating the matrix asphalt to 180 ℃, and then conveying the matrix asphalt to a reaction kettle;
(2) Adding SBS into the reaction kettle and stirring evenly;
(3) Adding the rubber powder into a reaction kettle, mixing and stirring, controlling the temperature at 185 ℃, and swelling for 30min;
(4) Pumping the asphalt to a high-power colloid mill for strong shearing and grinding for 5min;
(5) Adding a stabilizer into the modified asphalt after strong shearing;
(6) And pumping the asphalt to a colloid mill for weak shearing grinding, and shearing for 5min to obtain the finished product of the rubber modified asphalt with large mixing amount.
Example 11
The highly-blended rubber-modified asphalts prepared in examples 6 to 10 were subjected to the tests for their performance indexes such as penetration (0.1 mm), ductility (cm), softening point (. Degree. C.), rotational viscosity (Pa. S), segregation softening point (. Degree. C.), and elastic recovery (%), and the results are shown in the following Table.
The results show that all indexes of the modified asphalt prepared by the pre-treatment rubber powder for the high-volume rubber modified asphalt meet the road standard and can be stably stored.
Performance index test result of high-mixing-amount rubber modified asphalt
| Index (I) | Example 6 | Example 7 | Example 8 | Example 9 | Example 10 |
| Penetration (0.1 mm)/25 ℃,100g, 5s) | 51 | 48 | 48 | 42 | 44 |
| Ductility (cm) (5 ℃ C.) | 21 | 17 | 15 | 12 | 11 |
| Softening Point (. Degree. C.) | 77 | 80 | 87 | 88 | 85 |
| Rotational viscosity (Pa.S) (180 ℃ C.) | 3.3 | 3.1 | 3.5 | 3.0 | 2.9 |
| Segregation softening point (. Degree.C.) (163 ℃ C., 48 h) | 2.1 | 1.3 | 1.6 | 1.9 | 1.4 |
| Elastic recovery (%) | 94 | 92 | 91 | 93 | 90 |
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various changes may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are included in the protective scope of the present invention.
It should be noted that, in the foregoing embodiments, various specific technical features and steps described in the above embodiments can be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations of the features and steps are not described separately.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (9)
1. The pretreatment rubber powder for the large-mixing-amount rubber powder modified asphalt is characterized by comprising the following components in parts by weight: 100 parts of rubber powder, 15-25 parts of asphalt, 3-5 parts of softening oil, 0.1-0.2 part of activating agent, 3-5 parts of rosin, 8-10 parts of carbon black and 5 parts of water.
2. The pre-treatment rubber powder for high-volume rubber modified asphalt according to claim 1, which is characterized in that: the rubber powder is waste tire rubber powder, and the particle size is 20-30 meshes.
3. The pre-treatment rubber powder for high-volume rubber modified asphalt according to claim 1, which is characterized in that: the activating agent is one or a mixture of any more of an activating agent 980, an activating agent 580, an activating agent 480, an activating agent 420 and an activating agent 950.
4. The pre-treatment rubber powder for high-volume rubber modified asphalt according to claim 1, which is characterized in that: the softening oil is any one of palm oil, aromatic oil, dioctyl phthalate, epoxidized soybean oil and coal tar.
5. The pre-treatment rubber powder for high-volume rubber modified asphalt according to claim 1, which is characterized in that: the asphalt is any one of low-grade asphalt, hard asphalt, rock asphalt and coal asphalt.
6. The preparation method of the pretreatment rubber powder for the large-mixing-amount rubber modified asphalt is characterized by comprising the following steps of:
(1) Adding rubber powder into a devulcanizer according to the weight of the formula;
(2) Mixing: adding asphalt, softening oil, an activating agent, rosin, carbon black and water into a desulfurizing tank according to the weight of the formula, and uniformly stirring;
(3) Desulfurizing for 40-60 min in a desulfurizing tank under high temperature and high pressure conditions;
(4) Cooling after the desulfurization is finished;
(6) And spreading calcium powder on the cooled material to obtain the pre-treatment adhesive powder.
7. The preparation method of the pretreatment rubber powder for the highly-blended rubber-modified asphalt according to claim 6, characterized by comprising the following steps: the desulfurization condition is that the temperature is 250-280 ℃ and the pressure is 18.5-22.5 Mpa.
8. The preparation method of the pre-treatment rubber powder for the high-volume rubber modified asphalt according to claim 6, is characterized in that: the calcium powder is nano-grade light calcium carbonate.
9. A pre-treating rubber powder for the high-content rubber modified asphalt used for road is disclosed.
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| CN104497598A (en) * | 2014-12-12 | 2015-04-08 | 天津海泰环保科技发展有限公司 | Pasty rubber and SBS co-modified asphalt and preparation method thereof |
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| WO2006037278A1 (en) * | 2004-10-09 | 2006-04-13 | Min Duo Chen | A reclaiming method of waste elastomer |
| CN102050965A (en) * | 2009-10-27 | 2011-05-11 | 中国石油化工股份有限公司 | Asphalt modifier granule composition and preparation method thereof |
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Application publication date: 20221108 |