CN116161903A - Asphalt mixture suitable for heavy-duty traffic road surface and heavy-duty road surface construction method - Google Patents
Asphalt mixture suitable for heavy-duty traffic road surface and heavy-duty road surface construction method Download PDFInfo
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- CN116161903A CN116161903A CN202310462019.7A CN202310462019A CN116161903A CN 116161903 A CN116161903 A CN 116161903A CN 202310462019 A CN202310462019 A CN 202310462019A CN 116161903 A CN116161903 A CN 116161903A
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The application relates to the technical field of asphalt mixtures, and particularly discloses an asphalt mixture suitable for a heavy-duty traffic road surface and a heavy-duty road surface construction method. The asphalt mixture comprises the following raw materials in parts by weight: 12-15 parts of asphalt, 68-75 parts of coarse aggregate, 15-18 parts of fine aggregate, 8-12 parts of mineral powder, 3-6 parts of lignin fiber, 3-5 parts of transparent powder modified polyvinyl alcohol, 1-3 parts of polytetrafluoroethylene fiber, 1-2 parts of hollow glass microspheres, 3-5 parts of compatilizer, 0.8-1.2 parts of amine antioxidant and 1-2 parts of polyacrolein microspheres. The asphalt mixture suitable for the heavy-duty traffic road surface is suitable for heavy-duty traffic and meets the market demand.
Description
Technical Field
The invention relates to the technical field of asphalt mixtures, in particular to an asphalt mixture suitable for a heavy-duty traffic road surface and a heavy-duty road surface construction method.
Background
Along with the rapid development of national economy in China, the construction of expressways enters climax. The asphalt concrete pavement has the advantages of sufficient mechanical strength, stable and comfortable driving, convenience in maintenance and the like, and plays an important role in the construction of highways.
However, with the development of traffic industry in China, the traffic volume of roads is rapidly increasing. In order to meet the life demands of human beings, vehicles are developed to be large, so that the axle weight of the vehicles is gradually increased, the asphalt concrete pavement is frequently damaged in early stage, and diseases such as fatigue cracking and the like are caused in early stage, so that the service life and the traffic capacity of the asphalt concrete pavement are seriously influenced. At present, in order to alleviate the phenomenon of frequent early damage of asphalt concrete pavement, various pavement structures capable of enhancing the adaptability of asphalt concrete pavement to heavy traffic have been developed. The anti-fatigue and anti-cracking performances of the asphalt concrete pavement with the pavement structure are improved.
However, under the heavy load action, the phenomena of early fatigue cracking and the like still exist on the asphalt concrete pavement. Accordingly, it is urgent to develop an asphalt mixture suitable for heavy traffic road surfaces.
Disclosure of Invention
In order to improve the dynamic stability of the asphalt mixture and enable the asphalt mixture to be more suitable for heavy-duty traffic, the application provides the asphalt mixture suitable for a heavy-duty traffic road surface and a construction method of the heavy-duty road surface.
In a first aspect, the present application provides an asphalt mixture suitable for heavy traffic road surfaces, which adopts the following technical scheme:
an asphalt mixture suitable for a heavy-duty traffic road surface comprises the following raw materials in parts by weight: 12-15 parts of asphalt, 68-75 parts of coarse aggregate, 15-18 parts of fine aggregate, 8-12 parts of mineral powder, 3-6 parts of lignin fiber, 3-5 parts of transparent powder modified polyvinyl alcohol, 1-3 parts of polytetrafluoroethylene fiber, 1-2 parts of hollow glass microspheres, 3-5 parts of compatilizer, 0.8-1.2 parts of amine antioxidant and 1-2 parts of polyacrolein microspheres.
By adopting the technical scheme, the prepared asphalt mixture is more suitable for heavy traffic, and has higher density, dynamic stability, saturation and lower void ratio. Wherein, the range of dynamic stability of the asphalt mixture suitable for the heavy-duty traffic road surface is 4889-4950 times/mm; the density is in the range of 2.49-2.62g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the The range of void fraction is 2.91-3.2%; the saturation ranges from 64-67%. The asphalt mixture suitable for heavy-duty traffic road surface of the application is through the mutual synergistic effect between each raw material for the asphalt concrete road surface that the asphalt mixture of the application obtained after the construction is more suitable for heavy-duty traffic, accords with market demand.
In the application, the lignin fiber is added into the raw material of the asphalt mixture suitable for the heavy-duty traffic road surface, and has very excellent thickening and cracking resistance, and the lignin fiber is added into the asphalt mixture suitable for the heavy-duty traffic road surface, so that the cracking resistance and the dynamic stability of the asphalt mixture can be improved. Meanwhile, transparent powder modified polyvinyl alcohol is also added into the raw materials of the asphalt mixture suitable for the heavy-duty traffic road surface, the polyvinyl alcohol is easy to form a film, transparent powder is easy to disperse, and the transparent powder is high in stability and hardness, and the transparent powder is used for modifying the polyvinyl alcohol, so that the prepared transparent powder modified polyvinyl alcohol can improve the dynamic stability of the asphalt mixture suitable for the heavy-duty traffic road surface, and reduce the void ratio of the asphalt mixture. And interaction force exists between the transparent powder modified polyvinyl alcohol and the lignin fiber, so that the transparent powder modified polyvinyl alcohol and the lignin fiber are mutually cooperated, and the asphalt mixture suitable for heavy traffic pavement is more compact and is more suitable for heavy traffic.
In addition, the polyacrolein microsphere and the amine antioxidant are added into the raw materials of the asphalt mixture suitable for the heavy-duty traffic road surface, on one hand, the ultraviolet resistance of the asphalt mixture can be improved, and meanwhile, the amine antioxidant and the polyacrolein microsphere can be subjected to chemical reaction with lignin fibers to generate a polymer with a three-dimensional network structure, so that the asphalt mixture suitable for the heavy-duty traffic road surface is more compact, the density and the saturation are increased, the void ratio is reduced, and the asphalt mixture is more suitable for the heavy-duty traffic.
Optionally, the transparent powder modified polyvinyl alcohol comprises the following raw materials in parts by weight: 15-20 parts of polyvinyl alcohol, 5-8 parts of transparent powder, 1-2 parts of coupling agent and 25-35 parts of water.
By adopting the technical scheme, the coupling agent is used for enabling the transparent powder to be adsorbed on the polyvinyl alcohol through intermolecular force, so that the interaction force between the transparent powder and the polyvinyl alcohol is increased, and raw materials are easy to obtain.
Optionally, the transparent powder modified polyvinyl alcohol is prepared by the following method: adding polyvinyl alcohol into water, stirring for 15-20min, sequentially adding a coupling agent and transparent powder under stirring, continuously stirring for 5-10min, then performing ultrasonic treatment for 15-25min, and removing water to obtain the transparent powder modified lignin fiber.
By adopting the technical scheme, the preparation method of the transparent powder modified polyvinyl alcohol is simple and easy to operate.
Optionally, the amine antioxidant is one or two of N, N '-diphenyl-p-phenylenediamine and 4,4' -di (phenylisopropyl) diphenylamine.
Optionally, the polyacrolein microsphere comprises the following raw materials in parts by weight: 15-20 parts of acrolein and 20-25 parts of water;
the polyacrolein microsphere is prepared by the following method:
distilling the acrolein, adding the distilled acrolein into water, heating to 13-18 ℃ under the protection of inert gas, regulating the pH of the mixed solution of the acrolein and the water to 5-8, stirring for 4-4.5h under the constant temperature condition, filtering, washing to be neutral, and vacuum drying at 22-25 ℃ to obtain the polyacrolein microsphere.
Through adopting above-mentioned technical scheme for the preparation method of polypropylene microballon is simple, and makes the polyacrolein microballon particle size that obtains less, adds it to the asphalt mixture that is applicable to heavy traffic road surface, can be better fill in the gap between the filler, simultaneously the mutual reaction between polypropylene microballon and the lignin fiber, makes the asphalt mixture that is applicable to heavy traffic road surface more closely knit.
Optionally, the fine aggregate is one or two of river sand and quartz sand.
Optionally, the asphalt is SBS modified asphalt.
By adopting the technical scheme, the SBS is a styrene thermoplastic elastomer, which is beneficial to improving the compatibility among the raw materials of the asphalt mixture of the heavy-duty traffic road surface.
Optionally, the compatibilizer is tall oil.
In a second aspect, the present application provides a heavy-duty pavement construction method, which adopts the following technical scheme:
the heavy-load pavement construction method comprises the following steps of:
step A: digging a groove;
and (B) step (B): paving a layer of stone with the grain diameter of 30+/-1 cm at the bottom of the groove to form a base layer;
step C: paving broken stone with the grain diameter of 3+/-1 cm on the surface of the base layer to form a cushion layer with the thickness of 12-15 cm;
step D: backfilling soil on the surface of the cushion layer, compacting to form a transition layer with the thickness of 4+/-1 cm;
step E: paving the asphalt mixture suitable for the heavy-duty traffic pavement in any one of the first aspect on the surface of the transition layer, compacting, and forming a surface layer with the thickness of 7-10 cm.
By adopting the technical scheme, the asphalt concrete pavement obtained after construction is more suitable for heavy-load traffic.
In summary, the present application has at least the following beneficial effects:
according to the asphalt mixture suitable for the heavy-duty traffic road surface, through the mutual synergistic effect between the lignin fibers and the transparent powder modified polyvinyl alcohol, the density of the asphalt mixture is increased, and the void ratio is reduced;
the asphalt mixture suitable for the heavy-duty traffic road surface, through the mutual synergistic effect among the lignin fiber, the polypropylene microsphere and the amine antioxidant, the void ratio of the asphalt mixture is further reduced, the saturation and the dynamic stability are further improved, and the asphalt mixture is more suitable for heavy-duty traffic.
Detailed Description
The present invention will be described in further detail with reference to examples.
Raw materials
Ethylene methyl acrylate copolymer with the brand DY-301 and the active ingredient content of 99 percent; polyvinyl alcohol, model 2488, brand 1763; SBS modified asphalt with penetration of 10mm, ductility (25 ℃) of 148cm, softening point of 44 ℃ and flash point of 180 ℃; mineral powder with granularity of 600 meshes; river sand, product number of HS03, adsorption rate of 95%, porosity of 41%, tightness index of 7.65, compressive strength of 5.36MPa, and specific gravity of 1.76g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the The broken stone is made of gravel, the number of the broken stone is 0-9, the firmness index is 98, the compressive strength is 5MPa, and the specific gravity is 1.0g/cm 3 The bending strength is 5MPa; lignin fiber, model 4080120160 mesh; hollow glass microsphere with content of 99.8% and density of 0.46g/cm 3 Model M16K; polytetrafluoroethylene fiber with specification mesh number of 200 meshes and elongation at break of 80%; tall oil with density of 0.95-1.0g/cm 3 The content is 99%, and the grade is industrial grade.
Preparation example I
Preparation example I-1
The transparent powder modified polyvinyl alcohol is prepared by the following method:
adding 18kg of polyvinyl alcohol into 30kg of water, stirring for 20min, adding 1kg of silane coupling agent under the condition of continuous stirring, then adding 6kg of transparent powder under the condition of stirring, continuously stirring for 10min, then carrying out ultrasonic treatment for 20min, and removing water to obtain transparent powder modified polyvinyl alcohol; wherein the silane coupling agent is 3-aminopropyl triethoxysilane, and the model is KH-550; the transparent powder is An Mi Weina T316 anhydrous transparent powder, and the median particle size is 2500 meshes.
PREPARATION EXAMPLE I-2
A transparent powder modified polyvinyl alcohol is different from the preparation example I-1 in that a silane coupling agent is not added into the raw materials, and the rest is the same as the preparation example I-1.
Preparation example II
Preparation example II-1
The polyacrolein microsphere is prepared by the following method: distilling 18kg of acrolein to remove an antioxidant in the acrolein, adding distilled acrolein into 20kg of water, introducing nitrogen, heating to 15 ℃, regulating the pH of a mixed solution of the acrolein and the water to 6 by using 15wt% sodium hydroxide solution, stirring for 4 hours at constant temperature, filtering, and discarding filtrate to obtain a pre-product; washing the pre-product to neutrality with distilled water, and vacuum drying at 23 deg.c to obtain polyacrolein microsphere.
Examples
Example 1
An asphalt mixture suitable for heavy traffic road surface has the raw material content shown in table 1.
Wherein the asphalt is SBS modified asphalt; the mineral powder is S95-level high furnace slag micropowder; the fine aggregate is river sand; the coarse aggregate is crushed stone with the particle size of 8-12cm and continuous grading; the transparent powder modified polyvinyl alcohol is prepared from a preparation example I-2; the compatilizer is EMA (ethylene methyl acrylate copolymer); the amine antioxidant is N, N' -diphenyl-p-phenylenediamine; polyacrolein microspheres were prepared from preparation II-1.
An asphalt mixture suitable for a heavy-duty traffic road surface is prepared by the following method:
mixing coarse aggregate, fine aggregate and mineral powder uniformly, adding hollow glass microspheres, stirring for 10min, and heating to 185 ℃ to obtain a mixture;
heating modified asphalt to 175 ℃, adding the modified asphalt into the mixture, stirring until the mixture is uniformly mixed, continuously stirring, adding compatilizer and transparent powder modified polyvinyl alcohol under the condition of the temperature of 175 ℃, stirring for 5min, sequentially adding polypropylene microspheres, amine antioxidant and lignin fiber, and continuously stirring for 30min to obtain the asphalt mixture suitable for heavy traffic road surfaces.
Examples 2 to 4
The asphalt mixtures of examples 2 to 4, which are suitable for use in heavy-duty traffic road surfaces, are different from example 1 in the content of the raw materials, and the remainder are the same as in example 1.
Example 5
An asphalt mixture suitable for heavy traffic road surface is different from example 3 in that a transparent powder modified polyvinyl alcohol is prepared from preparation example I-1, and the rest is the same as example 3.
Example 6
An asphalt mixture suitable for use on heavy-duty traffic surfaces differs from example 5 in that the compatibilizer is an equivalent amount of tall oil, the remainder being the same as in example 5.
Example 7
An asphalt mixture suitable for use on heavy traffic surfaces differs from example 6 in that the SBS modified asphalt is replaced with an equivalent amount of matrix asphalt, the remainder being the same as in example 6.
Comparative example
Comparative example 1
An asphalt mixture suitable for use on heavy traffic road surfaces is distinguished from example 1 in that the same amount of polyvinyl alcohol is used instead of the transparent powder modified polyvinyl alcohol, and the remainder is the same as in example 1.
Comparative example 2
An asphalt mixture suitable for heavy traffic road surface is different from example 1 in that no transparent powder modified polyvinyl alcohol is added into the raw materials, and the rest is the same as example 1.
Comparative example 3
An asphalt mixture suitable for heavy traffic road surface is different from example 1 in that lignin fiber is not added in the raw materials, and the rest is the same as example 1.
Comparative example 4
An asphalt mixture suitable for heavy traffic road surface is different from example 1 in that no polyacrolein microspheres are added to the raw materials, and the rest is the same as example 1.
Comparative example 5
An asphalt mixture suitable for heavy traffic road surface is different from example 1 in that no amine antioxidant is added into the raw materials, and the rest is the same as example 1.
Comparative example 6
The asphalt mixture suitable for heavy traffic road surface is different from example 1 in that lignin fiber, polyacrolein microsphere and amine antioxidant are not added into the raw materials, and the rest are the same as example 1.
Performance test
The following performance tests were carried out on 13 asphalt mixtures suitable for heavy-duty traffic road surfaces prepared in examples 1 to 7 and comparative examples 1 to 6:
dynamic stability detection: according to T0719-2011 in JTG E20-2011, road engineering asphalt and asphalt mixture test procedure, the 13 asphalt mixture wheel-milled plate-shaped test pieces suitable for heavy traffic road surfaces are cooled and then wrapped by preservative films, the test pieces are placed in a ventilated and dried place, and then the preservative films are removed when a rutting test is carried out, the rutting depth is detected, the dynamic stability of the asphalt mixture rutting test suitable for the heavy traffic road surfaces is represented by the number of times that the rutting depth is reduced by 1mm of wheel-milled travel, and the higher the number of times is, the better the dynamic stability of the test pieces is represented;
asphalt density test: the 13 asphalt mixtures suitable for the heavy traffic road surface are wheel-milled to form plate-shaped test pieces, then 10000 rutting tests are respectively carried out at 60 ℃ and under the condition of 0.7MPa, and asphalt density experiment detection is carried out on the 13 asphalt mixtures obtained after the rutting tests, wherein the detection results are shown in table 2.
As can be seen from table 2, the range of dynamic stability of the asphalt mixture suitable for heavy-duty traffic road surface of the present application is 4889-4950 times/mm; the density is in the range of 2.49-2.62g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the The range of void fraction is 2.91-3.2%; saturation ofThe range is 64-67%. The asphalt mixture suitable for the heavy-duty traffic road surface of the application is through the mutual synergistic effect between each raw material, is remarkably improved in density, dynamic stability and saturation, and is reduced in void ratio, so that the asphalt mixture suitable for the heavy-duty traffic road surface is more compact, the asphalt concrete road surface obtained after construction is more suitable for heavy-duty traffic, and the market demand is met.
Comparing comparative example 1 with example 1, the dynamic stability of the asphalt mixture for heavy traffic road surface prepared in example 1 is 4889 times/mm; density of 2.49g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the Void fraction 3.2%; the saturation was 64%. The dynamic stability of the asphalt mixture suitable for the heavy-duty traffic road surface, which is prepared in comparative example 1, is 4571 times/mm; density of 2.14g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the Void fraction 3.7%; the saturation was 51%. Compared with the example 1, the transparent powder modified polyvinyl alcohol is replaced by the equivalent polyvinyl alcohol in the raw materials of the asphalt mixture suitable for the heavy-duty traffic road surface in the comparative example 1, so that the density, dynamic stability and saturation of the asphalt mixture suitable for the heavy-duty traffic road surface are reduced, the void ratio is increased, the modification of the polyvinyl alcohol by the transparent powder is illustrated, and the asphalt mixture suitable for the heavy-duty traffic road surface is more suitable for the heavy-duty traffic.
Comparing comparative example 2 with example 1, the dynamic stability of the asphalt mixture for heavy traffic road surface prepared in example 1 is 4889 times/mm; density of 2.49g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the Void fraction 3.2%; the saturation was 64%. The dynamic stability of the asphalt mixture suitable for the heavy-duty traffic road surface, which is prepared in comparative example 2, is 4508 times/mm; density of 2.01g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the The void fraction was 3.9%; the saturation was 45%. Compared with the example 1, the transparent powder modified polyvinyl alcohol is not added into the raw materials of the asphalt mixture suitable for the heavy-duty traffic road surface in the comparative example 2, so that the density, dynamic stability and saturation of the asphalt mixture suitable for the heavy-duty traffic road surface are reduced, the void ratio is increased, and the addition of the transparent powder modified polyvinyl alcohol is helpful for making the asphalt mixture suitable for the heavy-duty traffic road surface more suitable for the heavy-duty traffic.
Comparative example 3 and example1, comparing, wherein the dynamic stability of the asphalt mixture which is suitable for the heavy-duty traffic road surface and is prepared in the example 1 is 4889 times/mm; density of 2.49g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the Void fraction 3.2%; the saturation was 64%. The dynamic stability of the asphalt mixture suitable for the heavy-duty traffic road surface prepared in comparative example 3 is 4453 times/mm; density of 1.92g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the Void fraction 4.2%; the saturation was 39%. Compared with example 1, the asphalt mixture suitable for heavy-duty traffic road surface in comparative example 3 has no lignin fiber added to the raw material, so that the density, dynamic stability and saturation of the asphalt mixture suitable for heavy-duty traffic road surface are reduced, the void ratio is increased, and the addition of lignin fiber is helpful to make the asphalt mixture suitable for heavy-duty traffic road surface more suitable for heavy-duty traffic.
Comparing comparative example 4 with example 1, the dynamic stability of the asphalt mixture for heavy traffic road surface prepared in example 1 is 4889 times/mm; density of 2.49g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the Void fraction 3.2%; the saturation was 64%. The dynamic stability of the asphalt mixture suitable for the heavy-duty traffic road surface prepared in comparative example 4 is 4461 times/mm; density of 1.91g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the Void fraction 4.2%; the saturation was 38%. Compared with example 1, the asphalt mixture suitable for heavy-duty traffic road surface in comparative example 4 has no polyacrolein microspheres added to the raw materials, so that the density, dynamic stability and saturation of the asphalt mixture suitable for heavy-duty traffic road surface are reduced, and the void ratio is increased, which means that the addition of polyacrolein microspheres helps to make the asphalt mixture suitable for heavy-duty traffic road surface more suitable for heavy-duty traffic.
Comparing comparative example 5 with example 1, the dynamic stability of the asphalt mixture for heavy traffic road surface prepared in example 1 is 4889 times/mm; density of 2.49g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the Void fraction 3.2%; the saturation was 64%. The dynamic stability of the asphalt mixture suitable for the heavy-duty traffic road surface, which is prepared in comparative example 5, is 4486 times/mm; density of 1.98g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the Void fraction 4.0%; the saturation was 40%. Compared with the example 1, the asphalt mixture suitable for heavy traffic road surface in the comparative example 5 has no amine antioxidant added in the raw materials, so thatThe density, dynamic stability and saturation of the asphalt mixture suitable for the heavy-duty traffic road surface are reduced, the void ratio is increased, and the addition of the amine antioxidant is helpful for enabling the asphalt mixture suitable for the heavy-duty traffic road surface to be more suitable for heavy-duty traffic.
Comparing comparative example 6 with example 1, the dynamic stability of the asphalt mixture for heavy traffic road surface prepared in example 1 is 4889 times/mm; density of 2.49g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the Void fraction 3.2%; the saturation was 64%. The dynamic stability of the asphalt mixture suitable for the heavy-duty traffic road surface, which is prepared in comparative example 6, is 4310 times/mm; density of 1.82g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the Void fraction 4.7%; the saturation was 33%. Compared with the example 1, the asphalt mixture suitable for the heavy-duty traffic road surface in the comparative example 6 is not added with lignin fiber, polyacrolein microsphere and amine antioxidant, so that the density, dynamic stability and saturation of the asphalt mixture suitable for the heavy-duty traffic road surface are obviously reduced, and the void ratio is obviously increased. In combination with comparative examples 3 to 5, it can be seen that the asphalt mixture for heavy traffic road surface prepared in comparative example 6 has further reduced density, dynamic stability and saturation and further increased void fraction, compared with comparative examples 3 to 5. The mutual synergistic effect of the lignin fiber, the polyacrolein microsphere and the amine antioxidant is shown, and the mutual synergistic effect of the lignin fiber, the polyacrolein microsphere and the amine antioxidant enables the asphalt mixture suitable for heavy traffic pavement to be more suitable for heavy traffic.
Application example
Application examples 1 to 7
The pavement construction method of application examples 1-7 comprises the following steps:
step A: digging a groove by using an excavator according to a design drawing;
and (B) step (B): paving a layer of stone with the grain diameter of 35+/-1 cm at the bottom of the groove to form a base layer;
step C: paving broken stone with the grain diameter of 3+/-1 cm on the surface of the base layer to form a cushion layer with the thickness of 12 cm;
step D: backfilling soil on the surface of the cushion layer, compacting and flattening by a road roller to form a transition layer with the thickness of 4+/-1 cm;
step E: asphalt mixture suitable for heavy-duty traffic road surfaces is paved on the surface of the transition layer, compacted and flattened through a road roller to form a surface layer with the thickness of 8cm, and the asphalt mixture suitable for heavy-duty traffic road surfaces is prepared in sequence according to examples 1-7.
The present embodiment is only for explanation of the present invention and is not to be construed as limiting the present invention, and modifications to the present embodiment, which may not creatively contribute to the present invention as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present invention.
Claims (9)
1. The asphalt mixture suitable for the heavy-duty traffic pavement is characterized by comprising the following raw materials in parts by weight: 12-15 parts of asphalt, 68-75 parts of coarse aggregate, 15-18 parts of fine aggregate, 8-12 parts of mineral powder, 3-6 parts of lignin fiber, 3-5 parts of transparent powder modified polyvinyl alcohol, 1-3 parts of polytetrafluoroethylene fiber, 1-2 parts of hollow glass microspheres, 3-5 parts of compatilizer, 0.8-1.2 parts of amine antioxidant and 1-2 parts of polyacrolein microspheres.
2. The asphalt mixture for heavy traffic pavement according to claim 1, wherein the transparent powder modified polyvinyl alcohol comprises the following raw materials in parts by weight: 15-20 parts of polyvinyl alcohol, 5-8 parts of transparent powder, 1-2 parts of coupling agent and 25-35 parts of water.
3. The asphalt mixture for heavy traffic pavement according to claim 1, wherein the transparent powder modified polyvinyl alcohol is prepared by the following method:
adding polyvinyl alcohol into water, stirring for 15-20min, sequentially adding a coupling agent and transparent powder under stirring, continuously stirring for 5-10min, then performing ultrasonic treatment for 15-25min, and removing water to obtain the transparent powder modified lignin fiber.
4. The asphalt mixture for heavy traffic road surface according to claim 1, wherein the amine antioxidant is one or two of N, N '-diphenyl-p-phenylenediamine and 4,4' -di (phenylisopropyl) diphenylamine.
5. The asphalt mixture suitable for heavy traffic pavement according to claim 1, wherein the polyacrolein microspheres comprise the following raw materials in parts by weight: 15-20 parts of acrolein and 20-25 parts of water;
the polyacrolein microsphere is prepared by the following method:
distilling the acrolein, adding the distilled acrolein into water, heating to 13-18 ℃ under the protection of inert gas, regulating the pH of the mixed solution of the acrolein and the water to 5-8, stirring for 4-4.5h under the constant temperature condition, filtering, washing to be neutral, and vacuum drying at 22-25 ℃ to obtain the polyacrolein microsphere.
6. The asphalt mixture for heavy traffic pavement according to claim 1, wherein the fine aggregate is one or two of river sand and quartz sand.
7. The asphalt mixture for heavy traffic pavement according to claim 1, wherein the asphalt is SBS modified asphalt.
8. The asphalt mixture for heavy traffic pavement according to claim 1, wherein the compatibilizer is tall oil.
9. The heavy-load pavement construction method is characterized by comprising the following steps of:
step A: digging a groove;
and (B) step (B): paving a layer of stone with the grain diameter of 30+/-1 cm at the bottom of the groove to form a base layer;
step C: paving broken stone with the grain diameter of 3+/-1 cm on the surface of the base layer to form a cushion layer with the thickness of 12-15 cm;
step D: backfilling soil on the surface of the cushion layer, compacting to form a transition layer with the thickness of 4+/-1 cm;
step E: paving the asphalt mixture suitable for heavy-duty traffic pavement according to any one of claims 1-8 on the surface of the transition layer, compacting, and forming a surface layer with the thickness of 7-10 cm.
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| CN202310462019.7A CN116161903B (en) | 2023-04-26 | 2023-04-26 | Asphalt mixture suitable for heavy-duty traffic road surface and heavy-duty road surface construction method |
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| CN116161903A true CN116161903A (en) | 2023-05-26 |
| CN116161903B CN116161903B (en) | 2023-07-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108298875A (en) * | 2018-05-02 | 2018-07-20 | 金陵科技学院 | A kind of bituminous concrete and preparation method thereof |
| CN109761541A (en) * | 2019-01-28 | 2019-05-17 | 殷红平 | A kind of asphalt and its processing technology for Heavy Traffic road surface |
| CN113863082A (en) * | 2021-10-11 | 2021-12-31 | 上海市政工程设计研究总院（集团）有限公司 | BRT station heavy-load traffic road section paving structure and construction method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108298875A (en) * | 2018-05-02 | 2018-07-20 | 金陵科技学院 | A kind of bituminous concrete and preparation method thereof |
| CN109761541A (en) * | 2019-01-28 | 2019-05-17 | 殷红平 | A kind of asphalt and its processing technology for Heavy Traffic road surface |
| CN113863082A (en) * | 2021-10-11 | 2021-12-31 | 上海市政工程设计研究总院（集团）有限公司 | BRT station heavy-load traffic road section paving structure and construction method |
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