CN113213818A - Modified asphalt concrete and preparation method thereof - Google Patents
Modified asphalt concrete and preparation method thereof Download PDFInfo
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- CN113213818A CN113213818A CN202110642899.7A CN202110642899A CN113213818A CN 113213818 A CN113213818 A CN 113213818A CN 202110642899 A CN202110642899 A CN 202110642899A CN 113213818 A CN113213818 A CN 113213818A
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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
- 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 application relates to the technical field of asphalt concrete, and particularly discloses modified asphalt concrete and a preparation method thereof. The modified asphalt concrete comprises the following components in parts by weight: 20-25 parts of matrix asphalt; 5-10 parts of a modifier; 40-50 parts of a filler; 300 portions of aggregate and 400 portions of aggregate; 5-10 parts of fiber filler; 2-4 parts of polyethylene wax; 3-8 parts of monodisperse silicon dioxide microspheres; 0.5-1 part of coupling agent. The modified asphalt concrete has better high-temperature anti-rutting performance and low-temperature anti-cracking performance.
Description
Technical Field
The application relates to the technical field of asphalt concrete, in particular to modified asphalt concrete and a preparation method thereof.
Background
Asphalt concrete, commonly known as asphalt concrete, is a mixed mineral aggregate with a certain gradation composition, which is prepared by mixing broken stone, crushed gravel, stone chips, sand, mineral powder and the like with a certain proportion of road asphalt material under strictly controlled conditions. At present, the rut disease becomes one of the most serious diseases damaging asphalt pavements, and the comfort and safety of driving are greatly influenced, so that the prevention and the treatment of the rut disease are the first problems in the current highway construction.
The anti-rutting agent is an asphalt modifier mainly applied to preventing the rutting diseases of the asphalt pavement, and is used in a large amount in the production process of asphalt concrete. When the anti-rutting agent is added to prepare the asphalt concrete, although the high-temperature stability of the asphalt pavement can be obviously improved, the low-temperature crack resistance of the asphalt pavement is influenced, so that the obtained asphalt concrete is not suitable for being used in places with large temperature difference.
Therefore, the research of the asphalt concrete which can obviously improve the high-temperature rutting resistance of the asphalt pavement without influencing the low-temperature cracking resistance of the asphalt pavement has very important significance.
Disclosure of Invention
In order to improve the high-temperature anti-rutting performance of the asphalt concrete on the premise of not influencing the low-temperature anti-cracking performance of the asphalt concrete, the application provides the modified asphalt concrete and the preparation method thereof.
In a first aspect, the present application provides a modified asphalt concrete, which adopts the following technical scheme:
the modified asphalt concrete comprises the following components in parts by weight:
20-25 parts of matrix asphalt;
5-10 parts of a modifier;
40-50 parts of a filler;
300 portions of aggregate and 400 portions of aggregate;
5-10 parts of fiber filler;
2-4 parts of polyethylene wax;
3-8 parts of monodisperse silicon dioxide microspheres;
0.5-1 part of coupling agent.
By adopting the technical scheme, the monodisperse silicon dioxide microspheres in the raw materials can be matched with the modifier to modify the matrix asphalt, wherein the monodisperse silicon dioxide microspheres are used for modifying the matrix asphalt by surface crosslinking modification, so that the mechanical property of the asphalt mixture is improved. However, since the modification process between the monodisperse silica microspheres and the matrix asphalt is a physical process, the reinforcing effect of the monodisperse silica microspheres on the asphalt is limited. This application is through adding low molecular weight polyethylene and fibrous filler, the heat-resisting cold resistance, chemical resistance and the mechanical strength of bituminous mixture have further been improved, bituminous mixture's comprehensive properties has obviously been improved, simultaneously, the low molecular weight polyethylene of adding can produce chemical crosslinking with pitch, and low molecular weight polyethylene still easily adsorbs with monodisperse silica microsphere, thereby further crosslinking monodisperse silica microsphere and pitch, form comparatively stable network cross-linked structure, can show high temperature stability and the low temperature stability that improves bituminous mixture, thereby improve bituminous mixture's high temperature rutting resistance ability and low temperature crack resistance ability.
Preferably, the particle size of the monodisperse silica microspheres is 50-100 nm.
Through adopting above-mentioned technical scheme, further optimize through the particle diameter to monodisperse silica microballon, under the prerequisite of equal interpolation weight, make monodisperse silica microballon can be more abundant and asphalt between the contact, thereby improve the physical cross-linking degree between monodisperse silica microballon and the asphalt, simultaneously, make polyethylene wax change and adsorb with monodisperse silica microballon, thereby through the chemical crosslinking between polyethylene wax and the asphalt, further improve the cross-linking degree between monodisperse silica microballon and the asphalt, further improve the high temperature anti-rutting performance and the low temperature anti-cracking performance of the modified asphalt concrete of worth.
Preferably, the fibrous filler is a lignin fiber.
By adopting the technical scheme, the lignin fiber can play a role in cracking resistance in the asphalt mixture. In the asphalt mixture, fibers are overlapped to form a three-dimensional structure to form a fiber rib, so that polyethylene wax, monodisperse silicon dioxide microspheres and a cross-linking material of the asphalt are filled in the fiber rib, when the asphalt is in a low-temperature or dry environment, the cracking of a pavement is effectively reduced, and the low-temperature cracking resistance of the asphalt mixture is improved.
Preferably, the fibrous filler is polyacrylonitrile fiber.
By adopting the technical scheme, the polyacrylonitrile fiber is the polymer fiber, and compared with the lignin fiber, the polyacrylonitrile fiber is easier to totally disperse in the mixture, is easy to stir and disperse among all components, and further enhances the crosslinking performance among the polyethylene wax, the monodisperse silicon dioxide microspheres and the asphalt, thereby further improving the high-temperature anti-rutting performance and the low-temperature anti-cracking performance of the asphalt concrete.
Preferably, the fibrous filler has a length of 5 to 10mm and a diameter of 6 to 7 μm.
By adopting the technical scheme, the length and the diameter of the fiber filler are further optimized, so that the high-temperature stability and the low-temperature stability of the prepared modified asphalt concrete are further improved.
Preferably, the modifier is formed by mixing SBS and waste rubber powder according to the weight ratio of 1 (2-3).
By adopting the technical scheme, the SBS and the waste rubber powder are mixed to form the modifier to modify the matrix asphalt, and the modifier and the SBS have obvious synergistic promotion effect on improving the high temperature resistance of the asphalt mixture. And as SBS is expensive, the waste rubber powder is used for replacing part of SBS, the using amount of SBS can be reduced, the cost is reduced, and the low temperature resistance of the prepared modified asphalt mixture is equivalent to that of the asphalt mixture modified by SBS alone. Meanwhile, the waste rubber powder is used as a modifier, which is also beneficial to solving the problem of black pollution and protecting the environment.
Preferably, the filler is one or more of montmorillonite, mineral powder and diatomite.
By adopting the technical scheme, the filler and the polyethylene wax have better adsorption effect, so that the filler can be better adsorbed in a cross-linking network formed by the polyethylene wax, the monodisperse silicon dioxide microspheres and the asphalt, the mechanical strength and stability of the modified asphalt concrete are further improved, and the high-temperature anti-rutting performance and the low-temperature anti-cracking performance of the modified asphalt concrete are improved.
Preferably, the filler is formed by mixing montmorillonite and mineral powder according to the weight ratio of 1 (1.2-1.4).
By adopting the technical scheme, when the filler consists of montmorillonite and mineral powder according to the weight ratio, the prepared modified asphalt concrete has better high-temperature anti-rutting performance and low-temperature anti-cracking performance.
In a second aspect, the present application provides a method for preparing a modified asphalt concrete, which adopts the following technical scheme: a preparation method of modified asphalt concrete comprises the following steps:
s1, heating the matrix asphalt, adding the modifier, stirring and mixing to obtain a mixture A;
s2, adding the monodisperse silicon dioxide microspheres and the coupling agent into the mixture A after stirring and mixing, adding polyethylene wax and fiber filler, and stirring and mixing to obtain a mixture B;
and S3, stirring and mixing the filler and the aggregate, adding the mixture into the mixture B, and continuously stirring to obtain the modified asphalt concrete.
By adopting the technical scheme, the preparation process of the modified asphalt concrete is simple, the cost of the raw materials is low, the industrial production can be realized, the raw materials are stirred and mixed step by step, the raw materials are favorably and fully dispersed in the asphalt mixture, and the high-temperature anti-rutting performance and the low-temperature anti-cracking performance of the worthy modified asphalt concrete are improved. Meanwhile, the monodisperse silicon dioxide microspheres are subjected to surface treatment by using a coupling agent, so that the agglomeration phenomenon of the monodisperse silicon dioxide microspheres is reduced, and the monodisperse silicon dioxide microspheres are easy to disperse.
In summary, the present application has the following beneficial effects:
1. the modified asphalt concrete is prepared by adopting the monodisperse silicon dioxide microspheres and the polyethylene wax, the monodisperse silicon dioxide microspheres can physically crosslink the asphalt, the polyethylene wax can chemically crosslink the asphalt, and the polyethylene wax and the monodisperse silicon dioxide microspheres have good adsorbability, so that a net-shaped crosslinking structure consisting of the monodisperse silicon dioxide microspheres, the polyethylene wax and the asphalt is formed, and the high-temperature anti-rutting performance and the low-temperature anti-cracking performance of the modified asphalt concrete are improved;
2. the fiber filler in the application preferably adopts polyacrylonitrile fiber, and the polyacrylonitrile fiber is polymer fiber and is easily dispersed among all components, so that the crosslinking property among polyethylene wax, monodisperse silicon dioxide microspheres and asphalt is further enhanced, and the high-temperature rutting resistance and the low-temperature cracking resistance of asphalt concrete are further improved;
3. according to the application, the modifier formed by mixing the SBS and the waste rubber powder is used for modifying the matrix asphalt, and the SBS and the waste rubber powder have obvious synergistic effect, so that the cost is effectively reduced, the high-temperature resistance of the asphalt mixture is improved, and the low-temperature cracking resistance of the asphalt mixture is not influenced.
Detailed Description
The present application will be described in further detail with reference to examples.
The raw materials used in the examples of the present application are commercially available, except for the following specific descriptions:
base bitumen was collected from Ulmus Pumila Chemicals, CAS number: 8052-42-4;
SBS is collected from Yueyang petrochemical general plant, model YH-791;
the waste rubber powder is collected from a processing plant of Shengfei mineral products in Lingshou county, and is 80 meshes of waste tire powder, the model number is XJ-52, and the cargo number is 57;
the silica fume is obtained from Zhengzhou Jixing micro silicon powder marketing Co., Ltd, model SF 85;
the montmorillonite is collected from Tuolin mineral product processing factory in Lingshan county, 325 mesh, sodium montmorillonite;
the mineral powder is collected from Kadsura Hakkai Stone Ash factory in Bay area of Xiamen city, the fineness is 200-325 meshes, the content is 90 percent, the specific gravity is 2.4-2.8, and the water content is less than or equal to 0.5 percent;
the diatomite is obtained from SiO2≥75％，Fe2O3Less than or equal to 2 percent and less than or equal to 0.5 percent of water;
the chopped glass fiber is obtained from Taian spring peak glass fiber Co., Ltd, has a length of 13-15mm and a diameter of 10-12 μm; the lignin fiber is obtained from Shandong Sen Hong engineering materials Co., Ltd, and has a length of 13-15mm and a diameter of 10-12 μm;
the polyacrylonitrile fiber is obtained from Tai' an Zhi-Rong engineering materials Co., Ltd, and is divided into two types, one is 13-15mm in length and 10-12 μm in diameter, and the other is 5-10mm in length and 6-7 μm in diameter;
the monodisperse silicon dioxide microspheres are collected from Xian Qiyue biotechnology limited company, and have the particle sizes of 30nm, 50nm, 70nm, 100nm and 200nm respectively;
the silane coupling agent KH-560 is obtained from Shanghai Allantin Biotechnology, Inc., CAS number: 2530-83-8;
polyethylene wax was collected from Shanghai Aladdin Biotechnology, Inc., CAS number: 1314-13-2;
the aggregate is crushed stone with 5-16mm continuous gradation.
Examples
Example 1
The modified asphalt concrete comprises the following components in parts by weight shown in Table 1 and is prepared by the following steps:
s1, heating the matrix asphalt to 150 ℃, stirring for 30min at the rotating speed of 200r/min, then adding the modifier, heating to 170 ℃, and continuously stirring and mixing for 50min at the rotating speed of 200r/min to obtain a mixture A;
s2, stirring and mixing the monodisperse silicon dioxide microspheres and the coupling agent at the rotating speed of 1200r/min for 10min, adding the mixture into the mixture A, adding polyethylene wax and fiber filler, and stirring and mixing at the rotating speed of 600r/min for 15min to obtain a mixture B;
and S3, stirring and mixing the filler and the aggregate for 10min at the temperature of 50 ℃ and at the speed of 200r/min, adding the mixture into the mixture B, and continuously stirring and mixing for 20min to obtain the modified asphalt concrete.
Wherein the modifier is SBS;
the filler is silica fume;
the aggregate is crushed stone with 5-16mm continuous gradation;
the fiber filler is chopped glass fiber with the length of 13-15mm and the diameter of 10-12 mu m;
the particle size of the monodisperse silicon dioxide microspheres is 200 nm;
the coupling agent is a silane coupling agent KH-560.
Examples 2 to 6
A modified asphalt concrete, which is different from example 1 in that each component and the corresponding weight thereof are shown in table 1.
TABLE 1 Components and weights (kg) thereof in examples 1-6
Example 7
A modified asphalt concrete, which is different from that of example 4 in that the particle diameter of the monodisperse silica microspheres was 30 nm.
Example 8
A modified asphalt concrete, which is different from that of example 4 in that the particle diameter of the monodisperse silica microspheres was 50 nm.
Example 9
A modified asphalt concrete, which is different from that of example 4 in that the particle size of the monodisperse silica microspheres was 70 nm.
Example 10
A modified asphalt concrete, which is different from that of example 4 in that the particle size of the monodisperse silica microspheres was 100 nm.
Example 11
A modified asphalt concrete, which is different from that of example 9 in that the fibrous filler is lignin fiber, the length of the fiber is 13-15mm, and the diameter of the fiber is 10-12 μm.
Example 12
A modified asphalt concrete, which is different from that in example 9 in that the fibrous filler is polyacrylonitrile fiber, the length is 13-15mm, and the diameter is 10-12 μm.
Example 13
A modified asphalt concrete, which is different from that of example 12 in that polyacrylonitrile fiber has a length of 5 to 10mm and a diameter of 6 to 7 μm.
Example 14
A modified asphalt concrete is different from the modified asphalt concrete in example 13 in that a modifier is formed by mixing SBS and waste rubber powder according to the weight ratio of 1: 1.
Example 15
A modified asphalt concrete is different from the modified asphalt concrete in example 13 in that a modifier is formed by mixing SBS and waste rubber powder according to the weight ratio of 1:2.
Example 16
A modified asphalt concrete is different from the modified asphalt concrete in example 13 in that a modifier is formed by mixing SBS and waste rubber powder according to the weight ratio of 1: 2.5.
Example 17
A modified asphalt concrete is different from the modified asphalt concrete in example 13 in that a modifier is formed by mixing SBS and waste rubber powder according to the weight ratio of 1: 3.
Example 18
A modified asphalt concrete is different from the modified asphalt concrete in example 13 in that a modifier is formed by mixing SBS and waste rubber powder according to the weight ratio of 1: 4.
Examples 19 to 29
A modified asphalt concrete, which was different from example 16 in that each component and the corresponding weight thereof are shown in table 2.
TABLE 2 Components and weights (kg) of examples 16, 19-29
Comparative example
Comparative examples 1 to 13
An asphalt concrete was different from example 1 in that each component and the corresponding weight thereof are shown in table 3.
TABLE 3 Components and weights (kg) of comparative examples 1-13
Performance test
Taking the asphalt concretes prepared in the embodiments 1-29 and the comparative examples 1-13 as test objects respectively, and testing the Marshall stability of the asphalt concrete by referring to T0709-2011 Marshall stability test of asphalt mixture in JTG E20-2011 road engineering asphalt and asphalt mixture test procedure of the national Community of people's republic of China;
the dynamic stability of the asphalt concrete at 60 ℃ is tested by referring to T0719-2011 asphalt mixture rut test in the industrial standard JTG E20-2011 road engineering asphalt and asphalt mixture test regulation of the people's republic of China;
testing the-10 ℃ low-temperature bending failure strain of the asphalt concrete according to GB/T38948 and 2020 asphalt mixture low-temperature crack resistance evaluation method;
the test results are shown in Table 4 below.
Table 4 results of performance testing
As can be seen from the data in Table 4, the modified asphalt concrete prepared in the examples of the present application has Marshall stability of 11.0kN or more, dynamic stability of 9230 times/mm or more, and low temperature bending failure strain of 3200 or more. Therefore, the modified asphalt concrete has better high-temperature anti-rutting performance and low-temperature anti-cracking performance.
The difference between example 1 and comparative examples 1 to 3 is that comparative example 1 does not use polyethylene wax in the process of preparing asphalt concrete, comparative example 2 does not use monodisperse silica microspheres in the process of preparing asphalt concrete, and comparative example 3 does not use polyethylene wax and monodisperse silica microspheres in the process of preparing asphalt concrete, and it can be seen from the data in table 4 that the marshall stability, dynamic stability and low-temperature bending failure strain of the asphalt concrete prepared in comparative examples 1 to 3 are much lower than those of the modified asphalt concrete prepared in example 1, thereby showing that the use of polyethylene wax and monodisperse silica microspheres together can significantly improve the stability of asphalt concrete in the process of preparing asphalt concrete. The reason for analyzing the cross-linking structure is that the polyethylene wax, the monodisperse silicon dioxide microspheres and the asphalt can form cross-linking network structures, so that the cross-linking strength among the components of the asphalt mixture is further enhanced, and the mechanical strength and the stability of the asphalt mixture are improved.
The difference between example 1 and comparative examples 4-5 is that comparative example 4 does not use a coupling agent during the preparation of asphalt concrete, and comparative example 5 does not use a fibrous filler during the preparation of asphalt concrete, and it can be seen from the data in table 4 that the asphalt concrete prepared in comparative example 4 and comparative example 5 has lower properties than the modified asphalt concrete prepared in example 1. The reason for analyzing the problem is that the monodisperse silicon dioxide microspheres can be better dispersed in the asphalt mixture by adding the coupling agent, so that a cross-linked network structure is promoted to be formed between the monodisperse silicon dioxide microspheres and the polyethylene wax and asphalt, and the high-temperature anti-rutting performance and the low-temperature anti-cracking performance of the asphalt concrete are improved; by adding the fiber filler, the fiber filler is attached to the surface of a cross-linked structure consisting of the monodisperse silicon dioxide microspheres, the polyethylene wax and the asphalt, or a three-dimensional structure is formed between the fibers to play a role in strengthening the cross-linking of the asphalt mixture, so that the strength and the stability of the asphalt concrete are improved.
The difference between examples 1-6 and comparative examples 6-13 is that the amount of each component used in the process of preparing asphalt concrete is different, and it can be seen from the data in table 4 that the asphalt concrete prepared in the range of the mixture ratio in the examples of the present application can provide asphalt concrete with better high-temperature rutting resistance and low-temperature cracking resistance.
The difference between example 4 and examples 7-10 is that the particle size of the monodisperse silica microspheres is different, and it can be seen from the data in table 4 that the high temperature rutting resistance and the low temperature cracking resistance of the prepared modified asphalt concrete can be significantly improved when the particle size of the monodisperse silica microspheres is 50-100nm during the preparation of the modified asphalt concrete.
The difference between example 9 and examples 11 and 12 is that the type of the fibrous filler is different, the chopped glass fiber is used in example 9, the lignin fiber is used in example 11, the polyacrylonitrile fiber is used in example 12, and the data in table 4 show that the modified asphalt concrete prepared in example 12 has the best stability, the modified asphalt concrete prepared in example 11 has the second lowest stability, and the modified asphalt concrete prepared in example 9 has relatively poor stability.
The difference between example 12 and example 13 is that the length and diameter specifications of the fibrous filler are different, and the data in Table 4 show that when the length of the fibrous filler is 5-10mm and the diameter is 6-7 μm, the modified asphalt concrete has better high-temperature rutting resistance and low-temperature cracking resistance.
The examples 13 to 18 are different in the composition and ratio of the modifier, and it can be seen from the data in Table 4 that when the modifier is composed of SBS and crumb rubber in the weight ratio of 1 (2-3), the modified asphalt concrete has better stability.
The difference between the example 16 and the examples 19 to 29 is that the composition and the proportion of the filler are different, and the data in the table 4 show that in the process of preparing the modified asphalt concrete, the filler is preferably one or more of montmorillonite, mineral powder and diatomite, and is further preferably mixed by the montmorillonite and the mineral powder according to the weight ratio of 1 (1.2-1.4), so that the prepared modified asphalt concrete has better high-temperature rutting resistance and low-temperature cracking resistance.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (9)
1. The modified asphalt concrete is characterized by comprising the following components in parts by weight:
20-25 parts of matrix asphalt;
5-10 parts of a modifier;
40-50 parts of a filler;
300 portions of aggregate and 400 portions of aggregate;
5-10 parts of fiber filler;
2-4 parts of polyethylene wax;
3-8 parts of monodisperse silicon dioxide microspheres;
0.5-1 part of coupling agent.
2. The modified asphalt concrete according to claim 1, wherein the monodisperse silica microspheres have a particle size of 50-100 nm.
3. The modified asphalt concrete according to claim 1, wherein the fibrous filler is lignin fiber.
4. The modified asphalt concrete according to claim 1, wherein the fibrous filler is polyacrylonitrile fibers.
5. The modified asphalt concrete according to claim 1, wherein the fibrous filler has a length of 5 to 10mm and a diameter of 6 to 7 μm.
6. The modified asphalt concrete according to claim 1, wherein the modifier is prepared by mixing SBS and waste rubber powder according to the weight ratio of 1 (2-3).
7. The modified asphalt concrete according to claim 1, wherein the filler is one or more of montmorillonite, mineral powder and diatomite.
8. The modified asphalt concrete according to claim 1, wherein the filler is formed by mixing montmorillonite and mineral powder in a weight ratio of 1 (1.2-1.4).
9. A process for producing a modified asphalt concrete according to any one of claims 1 to 8, which comprises the steps of:
s1, heating the matrix asphalt, adding the modifier, stirring and mixing to obtain a mixture A;
s2, adding the monodisperse silicon dioxide microspheres and the coupling agent into the mixture A after stirring and mixing, adding polyethylene wax and fiber filler, and stirring and mixing to obtain a mixture B;
and S3, stirring and mixing the filler and the aggregate, adding the mixture into the mixture B, and continuously stirring to obtain the modified asphalt concrete.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115304926A (en) * | 2022-07-25 | 2022-11-08 | 章丘市黄河水利水电工程有限公司 | Modified asphalt and asphalt concrete |
| CN115321883A (en) * | 2022-08-29 | 2022-11-11 | 聊城市交通发展有限公司 | Steel slag SMA asphalt concrete and intersection rut rapid disposal structure |
| CN115710100A (en) * | 2022-12-10 | 2023-02-24 | 厦门市政沥青工程有限公司 | Micro-overlay asphalt mixture and preparation method thereof |
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| CN109265077A (en) * | 2018-09-10 | 2019-01-25 | 平湖市中建沥青混凝土工程有限公司 | A kind of dense-graded asphalt concrete mixture and preparation method thereof |
| CN112723792A (en) * | 2021-02-27 | 2021-04-30 | 北京岭北筑路材料有限公司 | Modified asphalt mixture and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20180024633A (en) * | 2016-08-30 | 2018-03-08 | 박홍철 | Filler composition for asphalt concrete |
| CN109265077A (en) * | 2018-09-10 | 2019-01-25 | 平湖市中建沥青混凝土工程有限公司 | A kind of dense-graded asphalt concrete mixture and preparation method thereof |
| CN112723792A (en) * | 2021-02-27 | 2021-04-30 | 北京岭北筑路材料有限公司 | Modified asphalt mixture and preparation method thereof |
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| CN115304926A (en) * | 2022-07-25 | 2022-11-08 | 章丘市黄河水利水电工程有限公司 | Modified asphalt and asphalt concrete |
| CN115321883A (en) * | 2022-08-29 | 2022-11-11 | 聊城市交通发展有限公司 | Steel slag SMA asphalt concrete and intersection rut rapid disposal structure |
| CN115710100A (en) * | 2022-12-10 | 2023-02-24 | 厦门市政沥青工程有限公司 | Micro-overlay asphalt mixture and preparation method thereof |
| CN115710100B (en) * | 2022-12-10 | 2023-11-07 | 厦门市政沥青工程有限公司 | Micro-overlay asphalt mixture and preparation method thereof |
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Application publication date: 20210806 |