CN114933810B - Warm mix asphalt mixture and preparation method thereof - Google Patents
Warm mix asphalt mixture and preparation method thereof Download PDFInfo
- Publication number
- CN114933810B CN114933810B CN202210460491.2A CN202210460491A CN114933810B CN 114933810 B CN114933810 B CN 114933810B CN 202210460491 A CN202210460491 A CN 202210460491A CN 114933810 B CN114933810 B CN 114933810B
- Authority
- CN
- China
- Prior art keywords
- paraffin
- particles
- asphalt
- sulfur
- mixture
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000010426 asphalt Substances 0.000 title claims abstract description 88
- 239000000203 mixture Substances 0.000 title claims abstract description 82
- 238000002360 preparation method Methods 0.000 title claims description 14
- 239000002245 particle Substances 0.000 claims abstract description 129
- 239000012188 paraffin wax Substances 0.000 claims abstract description 82
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 55
- 239000011593 sulfur Substances 0.000 claims abstract description 45
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 45
- 239000004642 Polyimide Substances 0.000 claims abstract description 36
- 229920001721 polyimide Polymers 0.000 claims abstract description 36
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 29
- 229920000642 polymer Polymers 0.000 claims abstract description 24
- 239000011159 matrix material Substances 0.000 claims abstract description 21
- 239000002904 solvent Substances 0.000 claims abstract description 21
- 238000005507 spraying Methods 0.000 claims abstract description 18
- 239000003921 oil Substances 0.000 claims description 23
- 238000003756 stirring Methods 0.000 claims description 21
- 239000000463 material Substances 0.000 claims description 17
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 13
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 claims description 12
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 11
- 239000004917 carbon fiber Substances 0.000 claims description 11
- 239000002174 Styrene-butadiene Substances 0.000 claims description 8
- 238000007605 air drying Methods 0.000 claims description 6
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 6
- 235000013539 calcium stearate Nutrition 0.000 claims description 6
- 239000008116 calcium stearate Substances 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- HOWGUJZVBDQJKV-UHFFFAOYSA-N docosane Chemical compound CCCCCCCCCCCCCCCCCCCCCC HOWGUJZVBDQJKV-UHFFFAOYSA-N 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 6
- ZYURHZPYMFLWSH-UHFFFAOYSA-N octacosane Chemical compound CCCCCCCCCCCCCCCCCCCCCCCCCCCC ZYURHZPYMFLWSH-UHFFFAOYSA-N 0.000 claims description 6
- 238000011049 filling Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 5
- 238000000498 ball milling Methods 0.000 claims description 4
- 239000003085 diluting agent Substances 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 4
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 229920005604 random copolymer Polymers 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 239000011115 styrene butadiene Substances 0.000 claims description 3
- 239000002345 surface coating layer Substances 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 description 13
- 238000004132 cross linking Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 239000007788 liquid Substances 0.000 description 6
- 239000003607 modifier Substances 0.000 description 6
- 230000003014 reinforcing effect Effects 0.000 description 6
- 239000002994 raw material Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000001993 wax Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 230000004927 fusion Effects 0.000 description 3
- 238000000265 homogenisation Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000035900 sweating Effects 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000010692 aromatic oil Substances 0.000 description 2
- 239000011384 asphalt concrete Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000012615 aggregate Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Paints Or Removers (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Working-Up Tar And Pitch (AREA)
Abstract
An asphalt mixture comprises the following components in parts by mass: 100 parts of matrix asphalt, 15-18 parts of polymer components, 20-25 parts of solvent oil and 30-33 parts of modified particles; the single particle structure of the modified particle comprises: hollow thermosetting polyimide tubular particles, a mixture of paraffin wax and sulfur particles filled in the hollow part inside the tubular particles, and an external paraffin wax spray coating the tubular particles.
Description
Technical Field
The application belongs to the field of asphalt pavement materials, and particularly relates to a warm mix asphalt modifier, an asphalt mixture and a preparation method thereof.
Background
Asphalt pavement has good functional performance such as good skid resistance and noise reduction, excellent flatness, quick open traffic, easy maintenance and repair, recycling and the like, and is widely applied. Under the combined action of load and environment, the asphalt pavement can be loose, rut and cracked, and the service life of the pavement is reduced. There are various techniques in the prior art for improving the durability of asphalt pavement by modifying agents.
Chinese patent CN107523072a discloses a warm mix sulfur asphalt comprising warm mix agent, base asphalt and sulfur; the warm mixing agent is prepared by taking polyethylene wax as a raw material through a sweating process, and organic substances which are oil-soluble and can be decomposed to generate gas are added into the raw material of the byproduct polyethylene wax in advance in the sweating process, and the gas generated after the warm mixing agent is heated is utilized to form tiny bubbles in a wax layer, so that the quick discharge of liquid components is facilitated, and the removal of low-molecular-weight components in the raw material is facilitated; meanwhile, in the sweating process, the liquid components are carried by the airflow through the wax layer so as to forcedly separate the solid components and the liquid components, and the low molecular weight components in the raw materials are removed more effectively, so that the preparation temperature and the use temperature of the sulfur asphalt are reduced, the occurrence amount of harmful gases is reduced, and meanwhile, the high-temperature stability of the asphalt pavement is improved.
Chinese patent CN106675055a discloses a asphalt warm mix modifier and a preparation method thereof, the asphalt warm mix modifier is composed of the following raw materials by weight: 22-27 parts of high molecular mixture, 20-25 parts of building petroleum asphalt, 30-40 parts of aromatic oil, 10-15 parts of rubber powder, 5-10 parts of styrene-butadiene rubber and a proper amount of solvent oil; the asphalt warm-mix modifier has long storage time and good thermal stability, and can reduce the mixing temperature of asphalt concrete and improve the road performance of asphalt concrete when being used for producing asphalt, and the stability and rut resistance of the produced asphalt are greatly improved.
Chinese patent CN110171937a discloses a warm mix agent, SBS/SBR modified warm mix asphalt mixture and preparation method, the warm mix agent comprises aromatic oil, slaked lime and quaternary ammonium salt surfactant; the modified warm mix asphalt comprises matrix asphalt, SBS or SBR, and the warm mix agent; the modified warm mix asphalt mixture comprises modified warm mix asphalt, aggregate, mineral powder and natural asphalt; the warm mix asphalt mixture ensures high and low temperature performance, reduces the mixing and forming temperature by more than 35 ℃ compared with the similar warm mix asphalt mixture, reduces energy consumption, reduces the emission of harmful gas, and is beneficial to environmental protection.
However, the problem of compatibility of asphalt with modified materials in the prior art has not been sufficiently solved, and further improvement of durability of asphalt mixture materials has been demanded. Accordingly, it is desirable to provide an asphalt mixture that can improve compatibility with asphalt materials as well as asphalt durability.
Disclosure of Invention
The technical problems to be solved by the application are as follows: the problem of compatibility between asphalt and modified materials in the prior art is not fully solved, and the durability of asphalt mixture needs to be further improved.
The technical scheme adopted for solving the technical problems is as follows:
an asphalt mixture comprises the following components in parts by mass:
100 parts of matrix asphalt, namely, a mixture of two or more of asphalt,
15-18 parts of a polymer component,
20-25 parts of solvent oil,
30-33 parts of modified particles;
the single particle structure of the modified particle comprises: hollow thermosetting polyimide tubular particles, a mixture of paraffin and sulfur particles filled in the hollow part inside the tubular particles, and an external paraffin spray coating the tubular particles, wherein the average length of the modified particles is 15-20mm, the average outer diameter is 10-12 mm, and the average inner diameter of the tubular particles is 5mm;
the preparation method of the modified particles comprises the following steps:
1) Preparation of Paraffin and Sulfur mixtures
Ball milling sulfur to form sulfur powder, adding paraffin into a container, heating the paraffin to 160 ℃ for melting, preserving heat, fully stirring for 20 minutes according to the proportion of adding 1.5g of calcium stearate into each 100g of paraffin, uniformly mixing the sulfur powder, adding the mixed solution of molten paraffin and calcium stearate into each 100g of paraffin according to the proportion of adding 17g of sulfur powder into each 100g of paraffin, and fully stirring uniformly;
2) Production of thermosetting polyimide tubular particles
Forming a hollow pipe by hot molding thermosetting polyimide, and cutting the pipe into hollow tubular particles with the length of 15-20 mm;
3) Filled paraffin and sulfur mixtures
Putting the hollow tubular particles into a molten paraffin and sulfur mixture, vibrating the mixture with the weight ratio of 1.5:1 by using ultrasonic vibration equipment for 15min so as to discharge air in the hollow tubular particles, completely filling the hollow parts with the paraffin and sulfur mixture, stopping heat preservation, removing the redundant paraffin and sulfur mixture, and cooling and air-drying the tubular particles to solidify the paraffin;
3) Spraying paraffin wax surface coating layer
Melting paraffin at 70 ℃ to form paraffin melt, spraying the paraffin melt onto the surfaces of tubular particles filled with paraffin and sulfur mixture through a spray gun, spraying 20 g of paraffin melt per 100g of tubular particles, and cooling and air-drying after spraying; the preparation method of the asphalt mixture comprises the following steps:
adding a diluent into the matrix asphalt, adding a polymer component and solvent oil, stirring for 30min, and keeping the temperature at 160+/-5 ℃ during stirring; adding the modified particles, stirring for 8 hours, and keeping the temperature at 160+/-5 ℃ during stirring; the thermosetting polyimide material of the tubular particles further comprises carbon fibers dispersed in a polyimide substrate, and the tubular product is formed by mixing the carbon fibers with the thermosetting polyimide and then hot molding; the mass ratio of the carbon fiber to the thermosetting polyimide is 15:100.
Specifically, the polymer component is one or more of styrene-butadiene-styrene block copolymer (SBS), styrene-butadiene block copolymer (SB) or styrene-butadiene random copolymer (SBR).
Specifically, the solvent oil is 120# solvent oil or 200# solvent oil.
Specifically, the paraffin wax comprises n-docosane or n-octacosane.
Specifically, the thermosetting polyimide is the model CP-0644 of the Dow DuPont company.
The application has the following beneficial effects:
the reinforced particles in the asphalt mixture provided by the application not only can play a role of reinforcing particles for reinforcing mechanical properties in an asphalt matrix, but also can be used as a better oil phase surface fusion agent, so that the wettability of the tubular particles and asphalt is better, and the paraffin and sulfur particles in the tubular particles can be fused in a warm mixing process, so that the paraffin and sulfur particles flow out of the tubular particles and are mixed with the asphalt matrix, and the sulfur particles can be used as bridging agents of polymer components, so that the polymer undergoes a crosslinking reaction, and the compatibility of the polymer components and the asphalt components is improved. In addition, the sulfur particles are gradually released from the inside of the tubular particles to the asphalt matrix along with stirring, so that the slow release effect is realized, the synchronization of material homogenization and crosslinking is realized, and the problem of uneven material structure caused by excessive concentration of crosslinking reaction is avoided.
Drawings
FIG. 1 shows a process for preparing an asphalt mixture according to the present application.
Description of the embodiments
The present application will be described in more detail below with reference to the attached drawings, in which preferred embodiments of the present application are shown, it being understood that one skilled in the art can modify the present application described herein while still achieving the beneficial effects of the present application. Accordingly, the following description is to be construed as broadly known to those skilled in the art and not as limiting the application.
In the interest of clarity, not all features of an actual implementation are described. In the following description, well-known functions or constructions are not described in detail since they would obscure the application in unnecessary detail. It will be appreciated that in the development of any such actual embodiment, numerous implementation details must be made in order to achieve the developer's specific goals.
In order to make the objects and features of the present application more comprehensible, embodiments accompanied with figures are described in detail below. It should be noted that the drawings are in a very simplified form and all employ non-precise ratios, and are merely convenient and clear to aid in the description of the embodiments of the application.
The application provides an asphalt mixture, which comprises the following components in parts by mass:
100 parts of matrix asphalt, namely, a mixture of two or more of asphalt,
15-18 parts of a polymer component,
20-25 parts of solvent oil,
30-33 parts of modified particles.
Specifically, the polymer component is one or more of styrene-butadiene-styrene block copolymer (SBS), styrene-butadiene block copolymer (SB) or styrene-butadiene random copolymer (SBR).
The solvent oil is 120# solvent oil or 200# solvent oil.
The single particle structure of the modified particle comprises: the modified polyimide composite pipe comprises hollow thermosetting polyimide tubular particles, a mixture of paraffin and sulfur particles filled in the hollow part inside the tubular particles and an external paraffin spray coating coated on the tubular particles, wherein the average length of the modified particles is 15-20mm, the average outer diameter of the modified particles is 10-12 mm, and the average inner diameter of the tubular particles is 5mm.
The paraffin wax may contain mainly n-docosane or n-octacosane; the thermosetting polyimide may be specifically selected from thermosetting polyimide of the type CP-0644 of the Dow DuPont company.
As a further preferred embodiment, the thermosetting polyimide material of the tubular particles may further comprise carbon fibers dispersed in a polyimide substrate, in a specific manner that may be, but is not limited to: mixing carbon fiber and thermosetting polyimide, and forming a pipe by hot molding; the mass ratio of the carbon fiber to the thermosetting polyimide is as follows: 15:100. The toughening effect can be further achieved by adding a certain amount of carbon fibers.
The reinforced particles in the asphalt mixture provided by the application not only can play a role of reinforcing particles for reinforcing mechanical properties in an asphalt matrix, but also can be used as a better oil phase surface fusion agent, so that the wettability of the tubular particles and asphalt is better, and the paraffin and sulfur particles in the tubular particles can be fused in a warm mixing process, so that the paraffin and sulfur particles flow out of the tubular particles and are mixed with the asphalt matrix, and the sulfur particles can be used as bridging agents of polymer components, so that the polymer undergoes a crosslinking reaction, and the compatibility of the polymer components and the asphalt components is improved. In addition, the sulfur particles are gradually released from the inside of the tubular particles to the asphalt matrix along with stirring, so that the slow release effect is realized, the synchronization of material homogenization and crosslinking is realized, and the problem of uneven material structure caused by excessive concentration of crosslinking reaction is avoided.
Specifically, the preparation method of the modified particles comprises the following steps:
1) Preparation of Paraffin and Sulfur mixtures
The sulfur is ball-milled to form sulfur powder, and the specific ball-milling process can be exemplified by: and (3) carrying out wet ball milling on sulfur, drying and sieving, and controlling the particle size of sulfur powder to be 100-200 microns. Adding paraffin into a container, heating the paraffin to 160 ℃ for melting, preserving heat, fully stirring for 20 minutes according to the proportion of adding 1.5g of calcium stearate into each 100g of paraffin, uniformly mixing, adding the mixed solution of molten paraffin and calcium stearate into each 100g of paraffin according to the proportion of adding 17g of sulfur powder into each 100g of paraffin, fully stirring uniformly, and stirring for 30 minutes.
2) Production of thermosetting polyimide tubular particles
The thermosetting polyimide is formed into a hollow pipe by hot molding, and the pipe is cut into hollow tubular particles with the length of 15-20 mm.
3) Filled paraffin and sulfur mixtures
And (3) putting the hollow tubular particles into a molten paraffin and sulfur mixture, vibrating the paraffin and sulfur mixture and the hollow tubular particles for 15min by using ultrasonic vibration equipment at a weight ratio of 1.5:1, so as to discharge air in the hollow tubular particles, completely filling the hollow parts with the paraffin and sulfur mixture, stopping heat preservation, discharging the redundant paraffin and sulfur mixture from the container, cooling and air-drying the tubular particles, and enabling the paraffin and sulfur mixture in the hollow tubular particles to be solidified in the hollow tubular particles at an air supply temperature of less than or equal to 15 ℃ for 1h.
In particular, for the specific way of discharging the excess paraffin and sulphur mixture from the vessel, it is possible to: the hollow tubular particles are prevented from being immersed into the molten liquid in the hollow lifting basket, and the hollow lifting basket is lifted after vibration filling is completed; the liquid leakage port with a valve can be arranged at the lower part of the container, and the valve can be opened to discharge the molten liquid after the vibration filling port is completed, and the like.
4) Spraying paraffin wax surface coating layer
Under the condition of 70 ℃, paraffin is melted to form paraffin melt, the paraffin melt is sprayed on the surfaces of tubular particles filled with a mixture of paraffin and sulfur through a spray gun, the spraying speed is 0.38g per second, 20 g of paraffin melt is sprayed on every 100g of tubular particles, cooling and air drying are carried out after spraying, the air supply temperature is less than or equal to 15 ℃, and the air supply time is 1h.
The following describes a method for producing an asphalt mixture according to the present application, which comprises:
1) Providing an asphalt matrix:
the asphalt material and the diluent are configured to form an asphalt material mixture. The above-mentioned asphalt material and the above-mentioned configuration and proportion of the diluent are well known to those skilled in the art, and will not be described here again.
2) Addition of Polymer Components
According to the components, adding a polymer component and solvent oil into the asphalt base material, stirring for 30min, and keeping the temperature at 160+/-5 ℃ during stirring;
3) Adding modified particles
According to the above components, modified particles were added to the mixture and stirred for 8 hours, and the temperature was kept at 160.+ -. 5 ℃ during the stirring.
Comparative test
Examples
An asphalt mixture comprises the following components in parts by mass: 1000g of matrix asphalt, 150g of SBS polymer component, 250g of 120# solvent oil and 300g of modified particles; the single particle structure of the modified particle comprises: hollow thermosetting polyimide tubular particles, a mixture of paraffin and sulfur particles filled in the hollow part inside the tubular particles, and an external paraffin spray coating the tubular particles, wherein the average length of the modified particles is 20mm, the average outer diameter is 12mm, and the average inner diameter of the tubular particles is 5mm; the paraffin wax comprises n-behenyl; the thermosetting polyimide is the type CP-0644 of the Dow DuPont company.
Example 2: an asphalt mixture comprises the following components in parts by mass: 1000g of matrix asphalt, 150g of SBS polymer component, 250g of 120# solvent oil and 300g of modified particles; the single particle structure of the modified particle comprises: hollow thermosetting polyimide tubular particles, a mixture of paraffin and sulfur particles filled in the hollow part inside the tubular particles, and an external paraffin spray coating the tubular particles, wherein the average length of the modified particles is 20mm, the average outer diameter is 12mm, and the average inner diameter of the tubular particles is 5mm; the paraffin wax comprises n-behenyl; the thermosetting polyimide is the model CP-0644 of the Dow DuPont company; the polyimide substrate of the central control tubular particle also contains 15% of carbon fiber by mass of polyimide.
Comparative example 1:
an asphalt mixture comprises the following components in parts by mass: 1000g of matrix asphalt, 150g of SBS polymer component, 250g of 120# solvent oil and 300g of modified particles; the single particle structure of the modified particle comprises: the modified polyimide composite pipe comprises hollow thermosetting polyimide tubular particles, paraffin filled in the hollow part inside the tubular particles and an external paraffin spray coating coated on the tubular particles, wherein the average length of the modified particles is 20mm, the average outer diameter is between 12mm, and the average inner diameter of the tubular particles is 5mm; the paraffin wax comprises n-behenyl; the thermosetting polyimide is the type CP-0644 of the Dow DuPont company.
Comparative example 2:
an asphalt mixture comprises the following components in parts by mass: 1000g of matrix asphalt, 150g of SBS polymer component, 250g of 120# solvent oil and 300g of modified particles.
After 10 hours of aging, the asphalt patterns were tested for penetration, softening point and ductility, and the tests were operated according to GB/T4509, GB/T4507 and GB/T4508, respectively, with the following experimental results:
therefore, the modifier provided by the application has certain improvement in penetration, softening point and ductility due to the improvement of the compatibility of the modifier and asphalt.
The application has the following beneficial effects: the reinforced particles in the asphalt mixture provided by the application not only can play a role of reinforcing particles for reinforcing mechanical properties in an asphalt matrix, but also can be used as a better oil phase surface fusion agent, so that the wettability of the tubular particles and asphalt is better, and the paraffin and sulfur particles in the tubular particles can be fused in a warm mixing process, so that the paraffin and sulfur particles flow out of the tubular particles and are mixed with the asphalt matrix, and the sulfur particles can be used as bridging agents of polymer components, so that the polymer undergoes a crosslinking reaction, and the compatibility of the polymer components and the asphalt components is improved. In addition, the sulfur particles are gradually released from the inside of the tubular particles to the asphalt matrix along with stirring, so that the slow release effect is realized, the synchronization of material homogenization and crosslinking is realized, and the problem of uneven material structure caused by excessive concentration of crosslinking reaction is avoided.
The foregoing has shown and described the basic principles, principal features and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present application, and various changes and modifications may be made without departing from the spirit and scope of the application, which is defined in the appended claims. The scope of the application is defined by the appended claims and equivalents thereof.
Claims (5)
1. An asphalt mixture characterized by: the asphalt mixture comprises the following components in parts by mass:
100 parts of matrix asphalt, namely, a mixture of two or more of asphalt,
15-18 parts of a polymer component,
20-25 parts of solvent oil,
30-33 parts of modified particles;
the single particle structure of the modified particle comprises: hollow thermosetting polyimide tubular particles, a mixture of paraffin and sulfur particles filled in the hollow part inside the tubular particles, and an external paraffin spray coating the tubular particles, wherein the average length of the modified particles is 15-20mm, the average outer diameter is 10-12 mm, and the average inner diameter of the tubular particles is 5mm;
the preparation method of the modified particles comprises the following steps:
1) Preparation of Paraffin and Sulfur mixtures
Ball milling sulfur to form sulfur powder, adding paraffin into a container, heating the paraffin to 160 ℃ for melting, preserving heat, fully stirring for 20 minutes according to the proportion of adding 1.5g of calcium stearate into each 100g of paraffin, uniformly mixing the sulfur powder, adding the mixed solution of molten paraffin and calcium stearate into each 100g of paraffin according to the proportion of adding 17g of sulfur powder into each 100g of paraffin, and fully stirring uniformly;
2) Production of thermosetting polyimide tubular particles
Forming a hollow pipe by hot molding thermosetting polyimide, and cutting the pipe into hollow tubular particles with the length of 15-20 mm;
3) Filled paraffin and sulfur mixtures
Putting the hollow tubular particles into a molten paraffin and sulfur mixture, vibrating the mixture with the weight ratio of 1.5:1 by using ultrasonic vibration equipment for 15min so as to discharge air in the hollow tubular particles, completely filling the hollow parts with the paraffin and sulfur mixture, stopping heat preservation, removing the redundant paraffin and sulfur mixture, and cooling and air-drying the tubular particles to solidify the paraffin;
4) Spraying paraffin wax surface coating layer
Melting paraffin at 70 ℃ to form paraffin melt, spraying the paraffin melt onto the surfaces of tubular particles filled with paraffin and sulfur mixture through a spray gun, spraying 20 g of paraffin melt per 100g of tubular particles, and cooling and air-drying after spraying; the preparation method of the asphalt mixture comprises the following steps:
adding a diluent into the matrix asphalt, adding a polymer component and solvent oil, stirring for 30min, and keeping the temperature at 160+/-5 ℃ during stirring; adding the modified particles, stirring for 8 hours, and keeping the temperature at 160+/-5 ℃ during stirring; the thermosetting polyimide material of the tubular particles further comprises carbon fibers dispersed in a polyimide substrate, and the tubular product is formed by mixing the carbon fibers with the thermosetting polyimide and then hot molding; the mass ratio of the carbon fiber to the thermosetting polyimide is 15:100.
2. The asphalt mixture of claim 1, further characterized by: the polymer component is one or more of styrene-butadiene-styrene block copolymer (SBS), styrene-butadiene block copolymer (SB) or styrene-butadiene random copolymer (SBR).
3. The asphalt mixture of claim 1, further characterized by: the solvent oil is 120# solvent oil or 200# solvent oil.
4. The asphalt mixture of claim 1, further characterized by: the paraffin wax comprises n-docosane or n-octacosane.
5. The asphalt mixture of claim 1, further characterized by: the thermosetting polyimide is the model CP-0644 of the Dow DuPont company.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210460491.2A CN114933810B (en) | 2022-04-28 | 2022-04-28 | Warm mix asphalt mixture and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210460491.2A CN114933810B (en) | 2022-04-28 | 2022-04-28 | Warm mix asphalt mixture and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114933810A CN114933810A (en) | 2022-08-23 |
| CN114933810B true CN114933810B (en) | 2023-10-13 |
Family
ID=82862717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210460491.2A Active CN114933810B (en) | 2022-04-28 | 2022-04-28 | Warm mix asphalt mixture and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114933810B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006256323A (en) * | 2005-02-21 | 2006-09-28 | Ist Corp | Tubular object and method of manufacturing the same |
| CN1990583A (en) * | 2005-12-29 | 2007-07-04 | 上海群康沥青科技有限公司 | Composite modified asphalt for pavement and preparation method thereof |
| CN106633947A (en) * | 2015-11-02 | 2017-05-10 | 中国石油化工股份有限公司 | Warm-mixed polymer modified asphalt and preparation method thereof |
| CN109251543A (en) * | 2018-08-20 | 2019-01-22 | 无锡创彩光学材料有限公司 | A kind of High-performance asphalt composition and preparation method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007054503A1 (en) * | 2005-11-10 | 2007-05-18 | Shell Internationale Research Maatschappij B.V. | Bitumen composition |
| AU2009232015B2 (en) * | 2008-04-02 | 2012-05-17 | Shell Internationale Research Maatschappij B.V. | Process for manufacturing asphalt |
-
2022
- 2022-04-28 CN CN202210460491.2A patent/CN114933810B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006256323A (en) * | 2005-02-21 | 2006-09-28 | Ist Corp | Tubular object and method of manufacturing the same |
| CN1990583A (en) * | 2005-12-29 | 2007-07-04 | 上海群康沥青科技有限公司 | Composite modified asphalt for pavement and preparation method thereof |
| CN106633947A (en) * | 2015-11-02 | 2017-05-10 | 中国石油化工股份有限公司 | Warm-mixed polymer modified asphalt and preparation method thereof |
| CN109251543A (en) * | 2018-08-20 | 2019-01-22 | 无锡创彩光学材料有限公司 | A kind of High-performance asphalt composition and preparation method thereof |
Non-Patent Citations (4)
| Title |
|---|
| 交联SBR改性沥青的研究;王仕峰等;《橡胶工业》;20020410;第49卷;第210-213页 * |
| 张登良.公知证据1.《沥青路面》.人民交通出版社,1998,第1页. * |
| 硫磺复合改性剂对沥青及沥青混合料性能的影响;贺炜;《山西交通科技》;20210215(第1期);第30-32页 * |
| 高黏改性沥青的开发与性能评价;贾利强等;《中外公路》;20200819;第40卷;第218-224页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114933810A (en) | 2022-08-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102222350B1 (en) | Base for asphalt agent and thereof manufacturing method and, asphalt agent for low and high temperature asphalt mixture and thereof manufacturing method and, asphalt mixture and thereof manufacturing method using the same | |
| Zhao et al. | Latent curing agent DDM‐PMMA microcapsule for epoxy resin | |
| CN109852085A (en) | A kind of high adhered modification pitch and preparation method thereof | |
| CN101735623A (en) | Warm mixed epoxy bitumen material and preparation method thereof | |
| CN110981285A (en) | Processing technology of asphalt mixture for heavy-load traffic pavement | |
| WO2013044861A1 (en) | Preparation method for fracturing proppant, fracturing proppant and use thereof | |
| CN114602396A (en) | Composite microsphere and preparation method thereof | |
| CN114933810B (en) | Warm mix asphalt mixture and preparation method thereof | |
| CN107201045B (en) | Normal-temperature regeneration modifier for waste asphalt mixture and preparation method thereof | |
| KR101981739B1 (en) | Liquid composition for repairing road cracks and manufacturing method thereof | |
| KR102115296B1 (en) | Plant-mix type recycled modified warm-mix additive, asphalt mixture using the same and method for manufacturing the same | |
| CN116082851A (en) | Preparation of self-adjusting and self-repairing modified asphalt | |
| CN113698138B (en) | high-RAP-content regeneration mixture and preparation method and application thereof | |
| CN105110722B (en) | Ultrafine pure-white inorganic fiber coating | |
| CN104302838A (en) | Modified-rubber composite and process for obtaining same | |
| CN105482476A (en) | Method for preparing nanoclay/styrene-butadiene rubber powder modified asphalt by adopting spray drying method | |
| CN109608893A (en) | Bridge deck water-proof tack coat waste rubber tyre powder asphalt material and preparation method thereof | |
| CN112143039A (en) | A direct-throwing M resin-based modified asphalt stabilizer and its preparation method and application | |
| CN107189458B (en) | Modified asphalt with thermal storage stability and preparation method thereof | |
| CN116178972B (en) | Microcapsule modified asphalt, preparation method, waterproof coiled material and coating thereof | |
| KR102517431B1 (en) | A seramic heat resistance and themal insulation paint | |
| CN106316179B (en) | A kind of high-environmental aggregate and preparation method thereof | |
| CN104801661A (en) | Preparation method for water-based paint for hydraulic part casting | |
| CN113337215B (en) | Flame-retardant coating material for tunnel pavement and preparation method thereof | |
| CN116178796B (en) | A coated vulcanizing agent, asphalt stabilizer and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |