CN113185192A - Anti-freezing asphalt mixture and preparation method thereof - Google Patents
Anti-freezing asphalt mixture and preparation method thereof Download PDFInfo
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- CN113185192A CN113185192A CN202110643283.1A CN202110643283A CN113185192A CN 113185192 A CN113185192 A CN 113185192A CN 202110643283 A CN202110643283 A CN 202110643283A CN 113185192 A CN113185192 A CN 113185192A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/76—Use at unusual temperatures, e.g. sub-zero
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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 mixtures, and particularly discloses an anti-freezing asphalt mixture and a preparation method thereof. The antifreeze asphalt mixture comprises the following components in parts by weight: 20-25 parts of modified asphalt; 50-60 parts of a filler; 550 portions of aggregate 450; 5-10 parts of an antifreezing agent; the antifreezing agent is formed by mixing rubber powder and emulsified asphalt powder. The antifreeze asphalt mixture has better antifreeze performance, and is not easy to crack when used in an environment with larger temperature difference.
Description
Technical Field
The application relates to the technical field of asphalt mixtures, in particular to an anti-freezing asphalt mixture and a preparation method thereof.
Background
The asphalt mixture is a general name of a mixture formed by mixing mineral aggregate and asphalt binder, mainly comprises asphalt, coarse aggregate, fine aggregate and mineral powder, and is added with polymer and wood cellulose.
At present, asphalt pavements formed by asphalt mixtures are the main pavement types of roads in China, and are widely applied to main roads such as airport runways, bridge pavement, expressways, urban roads and the like.
However, in cold environments or environments with large temperature differences between day and night, cracking of asphalt pavements is likely to occur, and the frost resistance of asphalt mixtures is to be improved.
Disclosure of Invention
In order to improve the freezing resistance of the asphalt mixture, the application provides the freezing-resistant asphalt mixture and the preparation method thereof.
In a first aspect, the application provides an anti-freeze asphalt mixture, which adopts the following technical scheme:
the antifreeze asphalt mixture comprises the following components in parts by weight:
20-25 parts of modified asphalt;
50-60 parts of a filler;
550 portions of aggregate 450;
5-10 parts of an antifreezing agent;
the antifreezing agent is formed by mixing rubber powder and emulsified asphalt powder.
Through adopting above-mentioned technical scheme, the rubber powder is abandonment tire powder, it has certain elasticity, can take place partial deformation when being extruded, can resume original volume when the extrusion disappears, under low temperature state, the water of infiltration freezes back volume expansion in the bituminous mixture to produce the extrusion to the rubber powder, make the rubber powder take place the deformation back, for the frozen water space of letting out, the ice-cube melts the back, the rubber powder resumes original volume, thereby with the gap filling, reduce the inside cracked production and the development of bituminous mixture. The emulsified asphalt powder is added, when the emulsified asphalt powder meets water, the emulsified asphalt powder is combined with the water and is dispersed into the emulsified asphalt, an asphalt membrane is formed after the emulsified asphalt is demulsified and is filled in gaps inside the asphalt mixture, the water absorption rate of the asphalt mixture can be obviously reduced, and meanwhile, the asphalt membrane has better flexibility and can offset part of stress generated by freeze-thaw cycle, so that the frost resistance of the asphalt mixture is improved.
Through using rubber powder and emulsified asphalt powder mixture, on the one hand, the water permeability of asphalt mixture has been reduced, reduce the inside water content of asphalt mixture, reduce the form that causes water because of freeze-thaw cycle constantly from liquid and solid-state transition, reduce the possibility of the inside fracture of asphalt mixture, on the other hand, when water freezes and extrudes rubber powder in asphalt mixture inside, make rubber powder take place deformation and lead to rubber powder to form the space between the frozen water, emulsified asphalt powder or redispersed emulsified asphalt can be with its air-struck packing, thereby further reduce the inside crack's of asphalt binder production and development, further improve the freeze resistance of asphalt binder.
Preferably, the weight ratio of the rubber powder to the emulsified asphalt powder in the antifreezing agent is 1 (0.4-0.6).
By adopting the technical scheme, the proportion of the rubber powder and the emulsified asphalt powder in the antifreezing agent is optimized, so that the antifreezing performance of the asphalt mixture is further improved, and the prepared asphalt mixture has less compressive strength and quality loss after a freeze-thaw cycle test.
Preferably, in the antifreeze, the particle size D97 of the rubber powder is 60 μm, and the particle size D97 of the emulsified asphalt powder is 3 μm.
By adopting the technical scheme, the filling effect of the rubber powder between the emulsified asphalt powder is improved by optimizing the particle sizes of the rubber powder and the emulsified asphalt powder, and the synergistic effect between the rubber powder and the emulsified asphalt powder is fully exerted, so that the frost resistance of the asphalt mixture is improved.
Preferably, the filler is any two of fly ash, slag powder and montmorillonite.
By adopting the technical scheme, the filler is formed by using any two compounds, so that a better filling effect is generated between two components in the filler, and the compactness of the asphalt mixture is improved, thereby reducing the water permeation and further improving the frost resistance of the asphalt mixture.
Preferably, the aggregate is formed by mixing 0-5mm of first aggregate, 5-10mm of second aggregate, 10-17mm of third aggregate and 17-27mm of fourth aggregate according to the weight ratio of 1 (1.5-2) to (2.5-3) to (5-6).
Through adopting above-mentioned technical scheme, through controlling the specification and the quantity of gathering materials, can make between the gathering materials, intensive mixing between gathering materials and other raw materials, the less aggregate of specification can be embedded into the great gap of gathering materials of specification, the packing of filler is deuterogamied, thereby the skeleton strength of bituminous mixture has been improved, strengthen the interact between the raw materials, reduce bituminous mixture's permeability, moisture in the infiltration bituminous paving has been reduced, thereby reduced and taken place because of the condition that water freezes and leads to the inside fracture of bituminous mixture, then improve bituminous mixture's freeze resistance.
Preferably, the anti-freezing asphalt mixture also comprises 10-20 parts of fiber filler.
By adopting the technical scheme, the fibers have an adsorption effect on the asphalt, so that the asphalt still keeps better flexibility and higher tensile strength at a lower temperature, and can effectively resist shrinkage stress, thereby remarkably improving the low-temperature crack resistance of the asphalt mixture and reducing the generation and development of internal cracks of the asphalt mixture at a low temperature.
Preferably, the fiber filler is one or more of basalt fiber, lignin fiber and polyacrylonitrile fiber.
By adopting the technical scheme, the three fibers have stronger adsorption effect on the asphalt, the affinity of the fibers in the asphalt mixture is improved, meanwhile, the fibers are fully dispersed in the asphalt mixture, the frost resistance of the asphalt mixture is improved, meanwhile, the three fibers can absorb the stress generated in the process of thermal expansion and cold shrinkage, the generation and development of cracks are reduced, and the low-temperature crack resistance of the asphalt mixture is further improved.
Preferably, the anti-freezing asphalt mixture comprises the following components in parts by weight:
23 parts of modified asphalt;
56 parts of a filler;
510 parts of aggregate;
8 parts of an antifreezing agent;
15 parts of fiber filler;
the modified asphalt is SBS modified asphalt;
the filler is formed by mixing slag powder and montmorillonite in a weight ratio of 1: 1;
the aggregate is formed by mixing 0-5mm of first aggregate, 5-10mm of second aggregate, 10-17mm of third aggregate and 17-27mm of fourth aggregate according to the weight ratio of 1:1.75:2.75: 5.5;
the antifreezing agent is formed by mixing rubber powder and emulsified asphalt according to the weight ratio of 1: 0.5;
the particle size D97 of the rubber powder is 60 mu m, and the particle size D97 of the emulsified asphalt powder is 3 mu m;
the fiber filler is formed by mixing basalt fibers and polyacrylonitrile fibers according to the weight ratio of 1:1.
By adopting the technical scheme, the prepared anti-freezing asphalt mixture has better anti-freezing performance under the conditions of the use and the proportion of the components.
In a second aspect, the application provides a method for preparing an anti-freeze asphalt mixture, which adopts the following technical scheme:
the preparation method of the anti-freezing asphalt mixture comprises the following steps:
s1, stirring and mixing the aggregate, the filler and the fiber filler to obtain a mixture A;
s2, heating the modified asphalt, adding an antifreezing agent, and stirring and mixing to obtain a mixture B;
and S3, adding the mixture A into the mixture B, and stirring and mixing to obtain the material.
By adopting the technical scheme, the preparation process is simple in steps, raw materials are easy to obtain, requirements on conditions are low, and large-scale industrial production can be realized. Through stirring the raw material components step by step, the dispersibility of the raw material components in the mixed matrix is improved, so that the compactness of the prepared asphalt mixture is improved, and the frost resistance of the asphalt mixture is improved.
Preferably, in S2, before adding the antifreeze into the mixer, the antifreeze is also subjected to ultrasonic pretreatment.
By adopting the technical scheme, the rubber powder and the emulsified asphalt powder in the antifreezing agent are fully mixed by pretreating the antifreezing agent, and the dispersibility of the antifreezing agent is improved, so that the antifreezing agent can be uniformly dispersed in the modified asphalt when being added into the modified asphalt for mixing, the compactness of the prepared asphalt mixture is improved, and the freezing resistance of the asphalt mixture is improved.
In summary, the present application has the following beneficial effects:
1. according to the anti-freezing agent, the rubber powder and the emulsified asphalt powder are mixed to form the anti-freezing agent, so that on one hand, the water permeability of an asphalt mixture is reduced, the moisture content in the asphalt mixture is reduced, and the condition that the interior of the asphalt mixture is cracked due to the fact that water freezes in the cooling process is reduced, on the other hand, the rubber powder is extruded and deformed by the frozen water, a certain gap is formed between the rubber powder and the frozen water, and the emulsified asphalt formed by redispersing the emulsified asphalt powder can fill the gap to improve the compactness of an asphalt binder, so that the rubber powder and the emulsified asphalt powder have an obvious synergistic promotion effect on the aspect of improving the anti-freezing performance of the asphalt binder, and the anti-freezing performance of the asphalt binder is improved;
2. by adding the fiber filler, the asphalt can effectively resist shrinkage stress due to the good adsorption effect of the fiber on the asphalt, and the generation and development of internal cracks of the asphalt mixture at low temperature are reduced, so that the low-temperature crack resistance of the asphalt mixture is improved;
3. according to the method, the rubber powder and the emulsified asphalt powder are fully mixed by carrying out ultrasonic pretreatment on the antifreezing agent and are added into the mixed matrix, so that the dispersibility is good, the compactness of the prepared asphalt mixture is improved, and the frost resistance of the asphalt mixture is further improved.
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:
the modified asphalt is prepared from SBS modified asphalt, a science and technology development Co., Ltd, of a new material of Weike in Zhejiang;
the rubber powder is waste tire powder which is obtained from Xiamen Hongjin trade Co Ltd, and the granularity specification of the rubber powder is respectively D97-60 mu m and D97-100 mu m;
the emulsified asphalt powder is obtained from the Brand Hodgkin petrochemical company Limited and is SBS modified emulsified asphalt powder, and the particle sizes are respectively D97-3 μm and D97-10 μm;
the aggregate is basalt broken stone with the size specification of 0-5mm, 5-10mm, 10-17mm, 17-27mm and 5-16mm respectively;
the fly ash is collected from Hangzhou Chengxing calcium products, Inc., with a cargo number zc 001;
the slag powder is collected from a Lingshou county Jianshi mineral powder factory, grade S95 slag powder, a cargo number of 3021;
the montmorillonite is collected from Tuolin mineral product processing factory in Lingshan county, and is sodium montmorillonite;
the chopped glass fiber is obtained from Taian spring peak glass fiber Co., Ltd, and the specification is 8 mm;
the basalt fiber is obtained from Tai' an Hao pine fiber Co., Ltd, model xwy, and the specification is 8 mm;
the lignin fiber is collected from Shandong Sen Hong engineering materials Co Ltd, and has a specification of 8 mm;
the polyacrylonitrile fiber is obtained from Tai' an Zhi Rong engineering materials Co., Ltd, and has a specification of 8 mm.
Examples
Example 1
An anti-freeze asphalt mixture, which comprises the following components in parts by weight as shown in Table 1, and is prepared by the following steps:
s1, stirring and mixing the aggregate and the filler for 20min at 40 ℃ and 300r/min to obtain a mixture A;
s2, heating the modified asphalt to 150 ℃, adding an antifreezing agent, and stirring and mixing at a rotation speed of 200r/min for 40min to obtain a mixture B;
s3, adding the mixture A into the mixture B, and stirring and mixing for 60min at 170 ℃ at 200r/min to obtain the material.
Wherein the modified asphalt is SBS modified asphalt;
the filler is slag powder;
the aggregate is 5-20mm basalt macadam with continuous gradation; (ii) a
The antifreezing agent is formed by mixing rubber powder and emulsified asphalt powder according to the weight ratio of 1: 1;
the granularity D97 of the rubber powder in the antifreeze is 100 mu m, and the granularity D97 of the emulsified asphalt powder is 10 mu m.
Examples 2 to 6
An anti-freeze asphalt mixture, which differs from example 1 in that the components and their respective weights are shown in table 1.
TABLE 1 Components and weights (kg) thereof in examples 1-6
Example 7
An antifreeze asphalt mixture is different from the antifreeze asphalt mixture in the embodiment 3 in that an antifreeze agent is formed by mixing rubber powder and emulsified asphalt powder according to the weight ratio of 1: 0.2.
Example 8
An antifreeze asphalt mixture is different from the antifreeze asphalt mixture in the embodiment 3 in that an antifreeze agent is formed by mixing rubber powder and emulsified asphalt powder according to the weight ratio of 1: 0.4.
Example 9
An antifreeze asphalt mixture is different from the antifreeze asphalt mixture in the embodiment 3 in that an antifreeze agent is formed by mixing rubber powder and emulsified asphalt powder according to the weight ratio of 1: 0.5.
Example 10
An antifreeze asphalt mixture is different from the antifreeze asphalt mixture in the embodiment 3 in that an antifreeze agent is formed by mixing rubber powder and emulsified asphalt powder according to the weight ratio of 1: 0.6.
Example 11
An antifreeze asphalt mixture is different from the mixture of the embodiment 9 in that the granularity D97 of the rubber powder in the antifreeze agent is 60 mu m, and the granularity D97 of the emulsified asphalt powder is 30 mu m.
Example 12
An anti-freeze asphalt mixture is different from the embodiment 11 in that the filler is formed by mixing fly ash and slag powder according to the weight ratio of 1:1.
Example 13
An anti-freezing asphalt mixture is different from the embodiment 11 in that the filler is formed by mixing fly ash and montmorillonite according to the weight ratio of 1:1.
Example 14
An anti-freezing asphalt mixture is different from the embodiment 11 in that the filler is formed by mixing montmorillonite and slag powder according to the weight ratio of 1:1.
Example 15
An anti-freeze asphalt mixture, which is different from example 14 in that the aggregates are composed of 0-5mm of first aggregates, 5-10mm of second aggregates, 10-17mm of third aggregates and 17-27mm of fourth aggregates mixed in a weight ratio of 1:1:2: 4.
Example 16
An anti-freeze asphalt mixture, which is different from example 11 in that the aggregates are composed of 0-5mm of first aggregates, 5-10mm of second aggregates, 10-17mm of third aggregates and 17-27mm of fourth aggregates mixed in a weight ratio of 1:1.5:2.5: 5.
Example 17
An antifreeze asphalt mixture is different from the embodiment 11 in that the aggregates are mixed by 0-5mm of first aggregates, 5-10mm of second aggregates, 10-17mm of third aggregates and 17-27mm of fourth aggregates according to the weight ratio of 1:1.75:2.75: 5.5.
Example 18
An anti-freeze asphalt mixture, which is different from example 11 in that the aggregates are composed of 0-5mm of first aggregates, 5-10mm of second aggregates, 10-17mm of third aggregates and 17-27mm of fourth aggregates mixed in a weight ratio of 1:2:3: 6.
Example 19
An anti-freeze asphalt mixture, which is different from example 11 in that the aggregates are composed of 0-5mm of first aggregates, 5-10mm of second aggregates, 10-17mm of third aggregates and 17-27mm of fourth aggregates mixed in a weight ratio of 1:3:4: 7.
Example 20
The antifreeze asphalt mixture is different from the embodiment 17 in that 10kg of fiber filler which is chopped glass fiber is also added in the preparation step S1 of the antifreeze asphalt mixture.
Example 21
The antifreeze asphalt mixture is different from the antifreeze asphalt mixture in the step S1 of preparing the antifreeze asphalt mixture, wherein 15kg of fiber filler is also added, and the fiber filler is chopped glass fiber.
Example 22
The antifreeze asphalt mixture is different from the embodiment 17 in that 20kg of fiber filler which is chopped glass fiber is also added in the preparation step S1 of the antifreeze asphalt mixture.
Examples 23 to 29
An antifreeze asphalt mixture which is different from the example 21 in that the components and the use amount of the fiber filler are shown in the table 2.
TABLE 2 Components and component weights (kg) of the fibrous fillers of examples 21, 23-29
Example 30
An antifreeze asphalt mixture is different from the embodiment 27 in that in the preparation process of the antifreeze asphalt mixture, in S2, before an antifreeze agent is added and stirred, ultrasonic pretreatment is carried out for 8min at the frequency of 28 kHz.
Comparative example
Comparative example 1
An asphalt mixture was different from example 1 in that the amount of the antifreeze was only 5kg of rubber powder.
Comparative example 2
An asphalt mixture was different from example 1 in that the antifreezing agent was only 5kg of emulsified asphalt powder.
Comparative example 3
An asphalt mixture was different from example 1 in that an antifreezing agent was not added at the time of preparing the asphalt mixture.
Performance test
The asphalt mixtures prepared in examples 1-30 and comparative examples 1-3 were respectively used as test objects, and the-10 ℃ low-temperature bending failure strain of the asphalt concrete was tested by referring to GB/T38948-.
TABLE 3 test results of Low temperature crack resistance
The data in table 3 show that the anti-freezing asphalt mixture prepared by the method has higher low-temperature bending failure strain, which indicates that the anti-freezing performance is good, wherein in the example 30, the best example is shown, and the low-temperature bending failure strain of the prepared anti-freezing asphalt mixture can reach 3423. The low temperature bending strain of the asphalt mixtures prepared in comparative examples 1 to 3 was significantly reduced compared to the asphalt mixtures prepared in the examples.
Example 1 is different from comparative examples 1 to 3 in that the antifreeze shown in example 1 is composed of 2.5kg of rubber powder and 2.5kg of emulsified asphalt powder by mixing, the antifreeze in comparative example 1 was only 5kg of rubber powder, the antifreeze in comparative example 2 was only 5kg of emulsified asphalt powder, in comparative example 3, no anti-freezing agent was used, and it can be seen from the data in table 3 that the low-temperature bending failure strain of the asphalt mixture prepared in comparative example 1 was only 2723, the asphalt mixture prepared in comparative example 2 had a low temperature bending failure strain of 2772, the asphalt mixture prepared in comparative example 3 had a low temperature bending failure strain of 2559, therefore, the antifreeze agent can obviously improve the antifreeze performance of the prepared asphalt mixture, and the rubber powder and the emulsified asphalt powder have better synergistic promotion effect, so that the frost resistance of the prepared asphalt mixture can be further improved.
Example 4 is different from examples 7 to 10 in the weight ratio of the rubber powder to the emulsified asphalt powder in the antifreeze, and as can be seen from the data in Table 3, when the antifreeze is composed of a mixture of the rubber powder and the emulsified asphalt powder in the weight ratio of 1 (0.4 to 0.6), the antifreeze asphalt mixture obtained has better antifreeze performance.
The difference between example 9 and example 11 is that the particle sizes of the rubber powder and the emulsified asphalt powder in the antifreeze are different, and it can be seen from the data in table 3 that when the particle size D97 of the rubber powder is 60 μm and the particle size D97 of the emulsified asphalt powder is 3 μm, the prepared antifreeze asphalt mixture has better antifreeze performance, and the low temperature bending failure strain can reach 3359 after the low temperature crack resistance test.
The difference between example 11 and examples 12-14 is that the compositions of the filler are different, and it can be seen from the data in table 3 that when the filler is composed of any two of fly ash, slag powder and montmorillonite, the freeze resistant asphalt mixture has better freeze resistance, and particularly when the filler is composed of slag powder and montmorillonite mixed according to the weight ratio of 1:1, the freeze resistant asphalt mixture has a low temperature bending failure strain of 3373 after being subjected to a low temperature crack resistance test.
Example 14 differs from examples 15-19 in the composition of the aggregates, and it can be seen from the data in Table 3 that when the aggregates are composed of 0-5mm of first aggregates, 5-10mm of second aggregates, 10-17mm of third aggregates and 17-27mm of fourth aggregates in a weight ratio of 1 (1.5-2) to 2.5-3 to 5-6, the resulting freeze resistant asphalt mixture has better freeze resistance.
The difference between example 17 and examples 20-29 is that in examples 20-29, the fibrous filler was added during the process of preparing the anti-freezing asphalt mixture, but the components and the usage amount of the fibrous filler in examples 20-29 were different, and it can be seen from the data in table 3 that the anti-freezing performance of the anti-freezing asphalt mixture can be significantly improved by adding the fibrous filler, and when the fibrous filler is formed by mixing basalt fiber and polyacrylonitrile fiber, the anti-freezing performance of the asphalt mixture can be significantly improved.
The difference between example 27 and example 30 is that in example 30, before the antifreeze agent was added to the mixture, the antifreeze agent was subjected to ultrasonic pretreatment, and as can be seen from the data in table 3, the antifreeze performance of the resulting antifreeze asphalt mixture was significantly improved by ultrasonic pretreatment of the antifreeze agent, and the reason for this analysis was that the antifreeze agent was subjected to ultrasonic pretreatment, so that the rubber powder and the emulsified asphalt powder in the antifreeze agent were sufficiently mixed, the dispersibility of the antifreeze agent in the entire asphalt mixture system was improved, the degree of compaction of the asphalt mixture was improved, and the antifreeze performance of the asphalt mixture was adjusted.
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 (10)
1. The anti-freezing asphalt mixture is characterized by comprising the following components in parts by weight:
20-25 parts of modified asphalt;
50-60 parts of a filler;
550 portions of aggregate 450;
5-10 parts of an antifreezing agent;
the antifreezing agent is formed by mixing rubber powder and emulsified asphalt powder.
2. The antifreeze asphalt mixture as claimed in claim 1, wherein the weight ratio of the rubber powder to the emulsified asphalt powder in the antifreeze is 1 (0.4-0.6).
3. The freeze resistant asphalt mixture according to claim 1, wherein in the freeze point depressant, the particle size of the rubber powder D97=60 μm and the particle size of the emulsified asphalt powder D97=3 μm.
4. The antifreeze bituminous mixture of claim 1, wherein said filler is any two of fly ash, slag powder, and montmorillonite.
5. The freeze resistant asphalt mixture according to claim 1, wherein said aggregates are composed of 0-5mm of first aggregates, 5-10mm of second aggregates, 10-17mm of third aggregates, 17-27mm of fourth aggregates mixed in a weight ratio of 1 (1.5-2) (2.5-3): 5-6.
6. The freeze resistant asphalt mixture according to claim 1, further comprising 10-20 parts of a fibrous filler.
7. The freeze resistant asphalt mix according to claim 6, wherein said fibrous filler is one or more of basalt fiber, lignin fiber, polyacrylonitrile fiber.
8. The antifreeze asphalt mixture of claim 1, wherein the antifreeze asphalt mixture comprises the following components in parts by weight:
23 parts of modified asphalt;
56 parts of a filler;
510 parts of aggregate;
8 parts of an antifreezing agent;
15 parts of fiber filler;
the modified asphalt is SBS modified asphalt;
the filler is formed by mixing slag powder and montmorillonite in a weight ratio of 1: 1;
the aggregate is formed by mixing 0-5mm of first aggregate, 5-10mm of second aggregate, 10-17mm of third aggregate and 17-27mm of fourth aggregate according to the weight ratio of 1:1.75:2.75: 5.5;
the antifreezing agent is formed by mixing rubber powder and emulsified asphalt according to the weight ratio of 1: 0.5;
the particle size of the rubber powder D97=60 μm, the particle size of the emulsified asphalt powder D97=3 μm;
the fiber filler is formed by mixing basalt fibers and polyacrylonitrile fibers according to the weight ratio of 1:1.
9. The preparation method of the anti-freezing asphalt mixture is characterized by comprising the following steps of:
s1, stirring and mixing the aggregate, the filler and the fiber filler to obtain a mixture A;
s2, heating the modified asphalt, adding an antifreezing agent, and stirring and mixing to obtain a mixture B;
and S3, adding the mixture A into the mixture B, and stirring and mixing to obtain the material.
10. The method of preparing an anti-freeze asphalt mixture according to claim 9, wherein in S2, the anti-freeze agent is further subjected to ultrasonic pretreatment before being added to the mixture for stirring.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114315231A (en) * | 2021-12-10 | 2022-04-12 | 广东冠粤路桥有限公司 | Asphalt mastic macadam mixture and asphalt mastic macadam structure layer |
| CN116040988A (en) * | 2023-03-31 | 2023-05-02 | 中交四公局第六工程有限公司 | Anti-freezing asphalt pavement composition and pavement construction method |
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| CN105368075A (en) * | 2014-08-27 | 2016-03-02 | 天长市高新技术创业服务中心 | Modified asphalt additive |
| CN108101464A (en) * | 2018-01-11 | 2018-06-01 | 中国铁道科学研究院铁道建筑研究所 | A kind of asphalt powder modified concrete with good frost resistance |
| CN109354441A (en) * | 2018-12-13 | 2019-02-19 | 吉林大学 | A kind of environmentally protective water-permeating pitch mixed material in cold area and preparation method thereof |
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| CN101239796A (en) * | 2008-01-16 | 2008-08-13 | 武汉理工大学 | High-performance low-noise asphalt pavement conserving material and preparation method thereof |
| CN105368075A (en) * | 2014-08-27 | 2016-03-02 | 天长市高新技术创业服务中心 | Modified asphalt additive |
| CN108101464A (en) * | 2018-01-11 | 2018-06-01 | 中国铁道科学研究院铁道建筑研究所 | A kind of asphalt powder modified concrete with good frost resistance |
| CN109354441A (en) * | 2018-12-13 | 2019-02-19 | 吉林大学 | A kind of environmentally protective water-permeating pitch mixed material in cold area and preparation method thereof |
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| CN114315231A (en) * | 2021-12-10 | 2022-04-12 | 广东冠粤路桥有限公司 | Asphalt mastic macadam mixture and asphalt mastic macadam structure layer |
| CN116040988A (en) * | 2023-03-31 | 2023-05-02 | 中交四公局第六工程有限公司 | Anti-freezing asphalt pavement composition and pavement construction method |
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