CN120736848A - Rut-resistant asphalt concrete and preparation method thereof - Google Patents
Rut-resistant asphalt concrete and preparation method thereofInfo
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- CN120736848A CN120736848A CN202511241466.5A CN202511241466A CN120736848A CN 120736848 A CN120736848 A CN 120736848A CN 202511241466 A CN202511241466 A CN 202511241466A CN 120736848 A CN120736848 A CN 120736848A
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/46—Rock wool ; Ceramic or silicate fibres
- C04B14/4643—Silicates other than zircon
- C04B14/4656—Al-silicates, e.g. clay
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/18—Waste materials; Refuse organic
- C04B18/24—Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper, cork
- C04B18/26—Wood, e.g. sawdust, wood shavings
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/0076—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials characterised by the grain distribution
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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
- C04B2111/20—Resistance against chemical, physical or biological attack
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Dispersion Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Road Paving Structures (AREA)
Abstract
本发明公开了一种抗车辙的沥青混凝土及其制备方法，属于道路工程中所用的建筑材料技术领域，其中抗车辙的沥青混凝土，由以下重量份的原料制成：粗集料50‑60份、细集料34‑40份、水泥3‑8份、纤维素稳定剂0.2‑0.5份和基质沥青4.5‑5.5份，其中粗集料与细集料的重量比为1.4‑1.65:1。该抗车辙的沥青混凝土通过高比例粗骨架嵌挤结构、水泥复合胶浆硬化和纤维素空间约束，形成“三位一体”的抗车辙机制；仅通过常规材料的创新配比与物理作用即达到同等性能，且在长期老化与极端温度下稳定性更优，与相比采用改性沥青配制而成的抗车辙混凝土，该混凝土可以降低25元/吨以上的成本，具有良好的经济效益。
The invention discloses a rutting-resistant asphalt concrete and a preparation method thereof, which belong to the technical field of building materials used in road engineering. The rutting-resistant asphalt concrete is made of the following raw materials in parts by weight: 50-60 parts of coarse aggregate, 34-40 parts of fine aggregate, 3-8 parts of cement, 0.2-0.5 parts of cellulose stabilizer and 4.5-5.5 parts of matrix asphalt, wherein the weight ratio of coarse aggregate to fine aggregate is 1.4-1.65:1. The rutting-resistant asphalt concrete forms a "trinity" anti-rutting mechanism through a high-proportion coarse skeleton embedded structure, cement composite mortar hardening and cellulose space constraint; the same performance is achieved only through the innovative proportioning and physical action of conventional materials, and the stability is better under long-term aging and extreme temperature. Compared with the rutting-resistant concrete prepared with modified asphalt, the concrete can reduce the cost of more than 25 yuan/ton, with good economic benefits.
Description
Technical Field
The invention belongs to the technical field of building materials used in road engineering, and particularly relates to rut-resistant asphalt concrete and a preparation method thereof.
Background
Asphalt concrete coarse is called asphalt concrete, and mineral aggregate, gravels or crushed gravels, stone chips or sand, mineral powder and the like with a certain grading composition are manually selected, and the mixture is mixed with road asphalt materials with a certain proportion under the strict control condition, and can be divided into two main types of petroleum asphalt and coal asphalt according to the different binders, and also can be mixed with natural asphalt or mixed with the natural asphalt according to the different types of aggregates, and can be divided into the most common types of gravels, sandy and slag according to the most common types of gravels.
The rut is a permanent deformation generated on a track belt of a traffic lane, and consists of a concave track and bulges at two sides, the appearance of the rut seriously affects the service life and service quality of a road surface, and at present, most serious is that asphalt is easy to melt or soften when the high-temperature stability of asphalt mixture is insufficient, especially at the temperature higher than 50 ℃, and an asphalt road surface structural layer generates transverse displacement due to the flow of an internal material under the action of a wheel load to form a concave track.
Ruts bring a lot of harm to road surfaces and road surface users, seriously affect the safety of high-speed driving, and are extremely easy to run away when the direction of the vehicle is changed, so that the driving stability of the vehicle is affected. The prior common preventive technical measures mainly adopt coarser mineral aggregate grading, but the contradiction exists between the rut resistance and the water stability, the grading rough adjustment can improve the rut resistance, but segregation is easy to occur, and the residual void ratio is large, so that the water seepage is damaged.
At present, the prior art discloses and reports that the high-temperature stability of asphalt concrete is improved by adding high molecular polymers such as anti-rutting agents, anti-stripping agents or phase change materials, for example, CN 117447128A is a high-strength anti-rutting asphalt concrete and a preparation method thereof, and the high-strength anti-rutting asphalt concrete is prepared from the following raw materials, by weight, 6-10 parts of cement, 65-85 parts of coarse aggregate, 19-23 parts of fine aggregate, 18-27 parts of modified asphalt, 2-5 parts of fibers, 0.4-0.7 part of anti-rutting agents, 3-4 parts of epoxy resins and 3-4 parts of curing agents. Although the modification effect is better, the high-strength anti-rutting asphalt concrete needs to adopt modified asphalt and anti-rutting agents, so that the manufacturing cost is higher, and the popularization and the application are not facilitated.
Therefore, the existing raw material proportion and production process of the asphalt concrete need to be optimized, so that the rut resistance of the asphalt concrete is improved with low cost.
Disclosure of Invention
The invention aims to provide rut-resistant asphalt concrete with simple preparation process and low cost and a preparation method of the asphalt concrete, so as to solve the problems in the prior art.
The technical scheme adopted for solving the technical problems is as follows:
the rut-resistant asphalt concrete is prepared from the following raw materials, by weight, 50-60 parts of coarse aggregate, 34-40 parts of fine aggregate, 3-8 parts of cement, 0.2-0.5 part of cellulose stabilizer and 4.5-5.5 parts of matrix asphalt, wherein the weight ratio of the coarse aggregate to the fine aggregate is 1.4-1.65:1.
The rut-resistant asphalt concrete disclosed by the invention adopts the coarse aggregate and the fine aggregate with the weight ratio of 1.4-1.65:1 to construct a high-strength framework, wherein the coarse aggregate is mainly used for a compact framework embedding structure, the fine aggregate is used for filling gaps of the coarse framework, the compactness and the shear deformation resistance of the concrete are improved, the porosity is reduced, and the deformation resistance and rut resistance of the concrete are obviously improved by internal friction force generated by direct contact between the coarse aggregate and the fine aggregate particles; the ratio of coarse aggregate to fine aggregate is lower than 1.4:1, the coarse aggregate cannot provide stronger support for the surface layer, the fine aggregate cannot form a supporting network with the coarse aggregate, the fine aggregate is too high in proportion, the porosity of the asphalt concrete is smaller and cannot meet the thermal expansion of asphalt and is easy to form a general oil rutting, if the ratio of the coarse aggregate to the fine aggregate is higher than 1.65:1, the fine aggregate cannot be well filled between the coarse aggregates because of the partial proportion of the coarse aggregate, the porosity of the asphalt concrete is larger, the asphalt concrete deforms under heavy pressure, so that the weight ratio of the coarse aggregate to the fine aggregate is controlled to be between 1.4 and 1.65:1, the asphalt concrete reaches an equilibrium state after being mixed and compacted, the asphalt concrete has a little gap, the hydration gelation of cement is favorable for forming an alkaline interface on the surface of the asphalt concrete, the adhesion between the aggregate and the base asphalt is further improved, the hydration product of the cement forms a micro-skeleton in asphalt cement slurry, cellulose stabilizing agent such as wood fiber bundles are formed after the water absorption swelling, the asphalt stabilizing agent such as asphalt fiber bundles are further limited, the lateral flow of the asphalt concrete can be further limited, and the three-dimensional rutting effect can be further limited.
And secondly, the anti-rutting asphalt concrete adopts a concrete raw material with wide sources and low cost to replace high molecular polymers such as anti-rutting agents, anti-stripping agents or phase change materials in the existing anti-rutting asphalt concrete, so that the manufacturing cost of the asphalt concrete is reduced.
The coarse aggregate consists of stones with the grain diameters of 5-10mm respectively, and the fine aggregate consists of stone chips with the grain diameters of less than or equal to 3mm and stones with the grain diameters of 3-5mm according to the weight ratio of 2-2.2:1.
In a certain exemplary embodiment, the 3-5mm stone is a stone with a particle size of 3mm, the 5-10mm stone is a mixture of stones with particle sizes of 5mm and 10mm, and the weight ratio of stones with particle sizes of 5mm and 10mm is 4-6:1.
Preferably, the rut-resistant asphalt concrete is prepared from the following raw materials, by weight, 20-27 parts of stone dust, 10-18 parts of 3-5mm fine aggregate, 40-50 parts of 5mm coarse aggregate, 8-15 parts of 10mm coarse aggregate, 3-6 parts of cement, 0.2-0.3 part of cellulose stabilizer and 4.8-5.1 parts of matrix asphalt.
In one exemplary embodiment, the rut resistant asphalt concrete is prepared from the following raw materials, by weight, 22 parts of stone chips, 16 parts of 3-5mm fine aggregates, 48 parts of 5mm coarse aggregates, 10 parts of 10mm coarse aggregates, 4 parts of cement, 0.3 part of cellulose stabilizer and 5.0 parts of matrix asphalt.
Preferably, the cement is ordinary silicate 425 cement, the cellulose stabilizer is wood fiber powder or basalt mineral fiber powder, and the matrix asphalt is No. 70 asphalt.
Preferably, the thickness of the rut resistant asphalt concrete is less than or equal to 4cm. If the thickness of the asphalt concrete is too thick (the thickness is greater than 4 cm), coarse aggregates in the surface layer of the asphalt concrete cannot provide good support for the asphalt concrete, but rather, the asphalt concrete tends to collapse due to the excessive support strength, resulting in rutting.
In one exemplary embodiment, the rutting resistant asphalt concrete is used as the bottom layer of AC25 asphalt concrete, and the AC25 asphalt concrete has a maximum nominal particle size of 26.5cm.
The invention solves the technical problems by adopting the following technical scheme:
a preparation method of rut-resistant asphalt concrete comprises the following steps:
s1, respectively drying and preheating coarse aggregate and fine aggregate to 160-170 ℃, and screening for later use;
s2, adding the S1 standby aggregate into an asphalt mixture stirring cylinder according to a proportion, then adding cement and a cellulose stabilizer according to a proportion, and carrying out dry mixing for 10-12S;
And S3, heating the matrix asphalt to 150-160 ℃, adding the matrix asphalt into an asphalt mixture stirring cylinder, stirring and mixing for 30-42S until a discharge door of the stirring cylinder is automatically opened on a direct discharge material conveying vehicle.
The concrete operation of the S1 is that the coarse aggregate and the fine aggregate are screened according to the grading materials, then are sent into an air drying cylinder through a conveying belt and a cold aggregate lifting machine in sequence, the aggregate is heated to 160-180 ℃, and then is conveyed to a vibrating screen through a hot aggregate lifting machine to be screened and then enters a hot stock bin for storage for standby.
S2, adding the aggregate into the asphalt mixture stirring cylinder in proportion through a hot aggregate weighing system.
Compared with the prior art, the invention has the beneficial effects that:
The anti-rutting asphalt concrete forms a three-in-one anti-rutting mechanism through a high-proportion coarse framework embedded structure (anti-deformation foundation) +cement composite cement hardening (adhesion and rigidity improvement) +cellulose space constraint (fluidity inhibition), achieves the same performance only through innovative proportioning and physical action of conventional materials without depending on polymer modification or chemical additives, has better stability under long-term aging and extreme temperature, and overcomes the technical bias that a person in the prior art thinks that rutting of asphalt concrete needs to be modified by adding an anti-rutting agent or asphalt under high temperature.
Compared with the anti-rutting concrete prepared from modified asphalt, the anti-rutting asphalt concrete has the advantages that the cost is obviously reduced, the average cost per ton of concrete can be reduced by more than 25 yuan per ton, the construction cost of asphalt concrete roads is reduced by more than 8 percent, and the anti-rutting asphalt concrete has obvious economic benefit.
Drawings
FIG. 1 is a process flow diagram of a method of preparing rut resistant asphalt concrete of the present invention;
FIG. 2 is a sample graph of Marshall's test performed on anti-rutting asphalt concrete samples of example 1 of the present invention;
FIG. 3 is a real view of the asphalt concrete pavement after the asphalt concrete construction molding for rut resistance in example 1 of the present invention;
FIG. 4 is a sample graph of Marshall's test for anti-rutting asphalt concrete sampling in example 3 of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Comparative example 1
The rut-resistant asphalt concrete is prepared from the following raw materials, by weight, 1 part of stone dust, 42 parts of 3mm fine aggregate, 24 parts of 5mm coarse aggregate, 33 parts of 10mm coarse aggregate and 5.0 parts of matrix asphalt, wherein the weight ratio of the coarse aggregate to the fine aggregate is 1.326:1.
The marshall test result of the asphalt concrete of this embodiment is qualified, but the result of the rutting test (sample feeding to the middle and large intelligent technologies and technologies, inc.) of the asphalt concrete is shown in the following table 1, the dynamic stability is 1212 times/min, and the CV is 12.6%, which satisfies the national standard of the product, but cannot satisfy the requirements of the road administration on the high-strength rutting-resistant asphalt concrete.
Table 1 rut test results
Note that 1. Test piece size: 300x50mm, 2. The specification requires that dynamic stability should not be less than 1000 times/mm.
Example 1
Referring to FIGS. 1 to 3, the rut resistant asphalt concrete of the present embodiment is prepared from the following raw materials, by weight, 22 parts of stone dust, 16 parts of 3mm fine aggregate, 48 parts of 5mm coarse aggregate, 10 parts of 10mm coarse aggregate, 4 parts of cement, 0.3 part of cellulose stabilizer and 5.0 parts of matrix asphalt, wherein the weight ratio of the coarse aggregate to the fine aggregate is 1.526:1.
The cement is ordinary silicate 425 cement, the cellulose stabilizer is wood fiber powder, and the matrix asphalt is No. 70 asphalt.
The thickness of the rut resistant asphalt concrete is 4cm.
The bottom layer of the rut-resistant asphalt concrete adopts AC25 asphalt concrete, and the maximum nominal particle size of the AC25 asphalt concrete is 26.5cm.
The anti-rutting asphalt concrete realizes the solidification of the AC13 mixture, reduces the softening point of asphalt, achieves the effect of no rutting deformation of asphalt concrete under high temperature and heavy load, realizes the rigid-flexible combination of asphalt, maintains the excellent performances of the AC13 mixture such as water damage resistance, low temperature cracking resistance, fatigue resistance and anti-scattering while improving the rutting resistance, greatly improves the bearing capacity of asphalt pavement, keeps the rutting depth index above the design life period, and effectively solves the problem of easy rutting of overweight load road sections, intersections and the like. Meanwhile, the skid resistance, the comfort and the safety of the road surface can be improved, the production cost and the maintenance cost are reduced, and the service life of the road is prolonged.
The preparation method of the rut-resistant asphalt concrete comprises the following steps:
s1, respectively drying and preheating coarse aggregate and fine aggregate to 160-170 ℃, and screening for later use;
S2, adding the S1 standby aggregate into an asphalt mixture stirring cylinder according to a proportion through a hot aggregate weighing system, then adding cement and a cellulose stabilizer according to a proportion, and carrying out dry mixing for 10S;
And S3, heating the matrix asphalt to 150-160 ℃, adding the matrix asphalt into an asphalt mixture stirring cylinder, stirring and mixing for 40S until a discharge door of the stirring cylinder is automatically opened on a direct discharge material conveying vehicle.
The concrete operation of the S1 is that the coarse aggregate and the fine aggregate are screened according to the grading materials, then are sent into an air drying cylinder through a conveying belt and a cold aggregate lifting machine in sequence, the aggregate is heated to 160-180 ℃, and then is conveyed to a vibrating screen through a hot aggregate lifting machine to be screened and then enters a hot stock bin for storage for standby.
Marshall experiment is carried out on the rut-resistant asphalt concrete, and the concrete conditions are that the experiment temperature is 168 ℃, the weight of the mixture is 1200+/-5 g, the compaction times are 75 times respectively, the test piece specification is that the diameter is 101.6mm, the height is 63.5mm, the density is 2.40, and the experiment result is qualified.
The results of the rutting test (completed by sample-to-middle and large intelligent technologies, inc.) of the asphalt concrete of this example are shown in Table 2 below, with a dynamic stability of 2906 times/min and a CV of 1.5%, which is significantly improved over that of the asphalt concrete of the comparative example.
Table 2 rut test results
Note that 1. Test piece size: 300x50mm, 2. The specification requires that dynamic stability should not be less than 1000 times/mm.
The comparative analysis of the cost of the AC-13 asphalt concrete produced in this example and the AC-13 asphalt concrete produced in the conventional process is shown in Table 3 below.
TABLE 3 comparative analysis of the cost of AC-13 asphalt concrete from two different formulations and production Process
As shown in Table 1, the performance of the rut-resistant asphalt concrete is equivalent to that of AC-13 asphalt concrete originally adopted by the applicant, but the cost is reduced by 25.41 yuan/ton, and because the quantity of asphalt concrete used in road construction is larger, if roads with the length of 500 m and the width of 3.5 m are paved, the AC-13 is required to be about 161 tons, the new process cost is 44806.3 yuan, the traditional process cost is 48897.31 yuan, the new process saves 4091.01 yuan compared with the traditional process, if roads with the length of 500 m and the width of 14 m are paved, the AC-13 is required to be about 644 tons, the new process cost is 179225.2 yuan, the traditional process cost is 195589.24 yuan, compared with the traditional process, the new process saves 16364.04 yuan, and the cost is reduced by 8.37 percent on the basis of the traditional process per ton of asphalt concrete.
Example 2
Referring to FIG. 1, the rut resistant asphalt concrete of the present embodiment is prepared from the following raw materials, by weight, 20 parts of stone dust, 16 parts of 3mm fine aggregate, 48 parts of 5mm coarse aggregate, 10 parts of 10mm coarse aggregate, 4 parts of cement, 0.3 part of cellulose stabilizer and 5.0 parts of matrix asphalt, wherein the weight ratio of the coarse aggregate to the fine aggregate is 1.61:1.
The cement is ordinary silicate 425 cement, the cellulose stabilizer is wood fiber powder, and the matrix asphalt is No. 70 asphalt.
The thickness of the rut resistant asphalt concrete is 4cm.
The bottom layer of the rut-resistant asphalt concrete adopts AC25 asphalt concrete, and the maximum nominal particle size of the AC25 asphalt concrete is 26.5cm.
A preparation method of the rut-resistant asphalt concrete is the same as that of the embodiment 1, and a Marshall experiment is carried out on a sample of the concrete, wherein the concrete has the specific conditions that the experiment temperature is 168 ℃, the weight of a mixture is 1200 g, the compaction times are 75 times respectively, the test piece specification is 101.6mm in diameter, 64.1mm in height and 2.38 in density, and the experiment result is qualified.
The results of the rutting test (completed by sample-to-middle and large intelligent technologies, inc.) of the asphalt concrete of this example are shown in Table 4 below, with a dynamic stability of 4242 times/min and a CV of 2.6%, which is significantly improved over that of the asphalt concrete of comparative example 1.
Table 4 rut test results
Note that 1. Test piece size: 300x50mm, 2. The specification requires that dynamic stability should not be less than 1000 times/mm.
The manufacturing cost of the rut-resistant asphalt concrete is 276.94 yuan/ton, and compared with the manufacturing cost of the traditional AC-13 asphalt concrete, the rut-resistant asphalt concrete reduces 26.77 yuan/ton and has good economic benefit.
Example 3
Referring to fig. 1, the rut resistant asphalt concrete of the present embodiment is different from that of example 1 in that:
The rut-resistant asphalt concrete is prepared from the following raw materials, by weight, 22 parts of stone dust, 15 parts of 3mm fine aggregate, 47 parts of 5mm coarse aggregate, 8 parts of 10mm coarse aggregate, 4 parts of cement, 0.3 part of cellulose stabilizer and 5.0 parts of matrix asphalt, wherein the weight ratio of the coarse aggregate to the fine aggregate is 1.486:1.
A preparation method of the rut-resistant asphalt concrete is the same as that of the embodiment 1, and a Marshall experiment is carried out on a sample of the concrete, wherein the concrete has the specific conditions that the experiment temperature is 170 ℃, the weight of a mixture is 1200 g, the compaction times are 75 times respectively, the specification of a test piece is 101.6mm in diameter and 64mm in height, the density is 2.38, a Marshall experiment sample real object is shown in fig. 4, and the experiment result is qualified.
Compared with the traditional AC-13 asphalt concrete, the manufacturing cost of the rut-resistant asphalt concrete is 275.48 yuan/ton, the manufacturing cost of the rut-resistant asphalt concrete is reduced by 28.23 yuan/ton, the construction cost is obviously reduced, and the rut-resistant asphalt concrete has great economic benefit.
After the anti-rutting asphalt concrete is successfully researched and developed by the applicant, a plurality of Hunan Ningxiang municipal works such as wei east Dao construction site works (2024, 7 months construction, using the anti-rutting asphalt concrete described in example 3), long county road works, along river road works (2024, 10 months construction, using the anti-rutting asphalt concrete described in example 2), tianyi medical construction sites (2025, 7 months construction, using the anti-rutting asphalt concrete described in example 1) and the like are paved and practically used for verification, and the constructed roads do not appear rutting until now, so that the problem that the rutting is easy to form at high temperature existing in the conventional asphalt concrete is thoroughly solved.
The foregoing merely illustrates some of the features of the embodiments of this invention and is not intended to limit the scope of the invention, as any modifications or variations could be made using the disclosed techniques, which would still fall within the scope of the invention.
Claims (10)
1. The rut-resistant asphalt concrete is characterized by being prepared from the following raw materials, by weight, 50-60 parts of coarse aggregate, 34-40 parts of fine aggregate, 3-8 parts of cement, 0.2-0.5 part of cellulose stabilizer and 4.5-5.5 parts of matrix asphalt, wherein the weight ratio of the coarse aggregate to the fine aggregate is 1.4-1.65:1.
2. The rut resistant asphalt concrete according to claim 1, wherein said coarse aggregate is composed of stones with a particle size of 5-10mm, and said fine aggregate is composed of stones with a particle size of 3mm or less and stones with a particle size of 3-5mm in a weight ratio of 2-2.2:1.
3. The rut resistant asphalt concrete according to claim 2, wherein said 3-5mm stone is 3mm particle size stone, said 5-10mm stone is a mixture of 5mm particle size and 10mm particle size stone, and the weight ratio of 5mm particle size to 10mm particle size stone is 4-6:1.
4. The rut resistant asphalt concrete according to claim 1, wherein said rut resistant asphalt concrete is prepared from the following raw materials, by weight, 22 parts of stone chips, 16 parts of 3-5mm fine aggregate, 48 parts of 5mm coarse aggregate, 10 parts of 10mm coarse aggregate, 4 parts of cement, 0.3 part of cellulose stabilizer and 5.0 parts of matrix asphalt.
5. The rutting resistant asphalt concrete according to claim 2, wherein said cement is Portland cement 425, said cellulose stabilizer is wood fiber powder or basalt mineral fiber powder, and said matrix asphalt is asphalt No. 70.
6. The rut resistant asphalt concrete according to claim 1, wherein said rut resistant asphalt concrete has a surface layer thickness of 4cm or less.
7. The anti-rutting asphalt concrete according to claim 1-6, wherein said anti-rutting asphalt concrete is AC25 asphalt concrete as a bottom layer.
8. The preparation method of the rut-resistant asphalt concrete is characterized by comprising the following steps of:
s1, respectively drying and preheating coarse aggregate and fine aggregate to 160-170 ℃, and screening for later use;
s2, adding the S1 standby aggregate into an asphalt mixture stirring cylinder according to a proportion, then adding cement and a cellulose stabilizer according to a proportion, and carrying out dry mixing for 10-12S;
And S3, heating the matrix asphalt to 150-160 ℃, adding the matrix asphalt into an asphalt mixture stirring cylinder, stirring and mixing for 30-42S until a discharge door of the stirring cylinder is automatically opened on a direct discharge material conveying vehicle.
9. The method for preparing rut-resistant asphalt concrete according to claim 8, wherein S1 comprises the specific steps of screening coarse aggregate and fine aggregate according to a grading material, sequentially conveying the coarse aggregate and the fine aggregate into an air drying cylinder through a conveying belt and a cold aggregate lifting machine, heating the aggregate to 160-180 ℃, conveying the aggregate to a vibrating screen through a hot aggregate lifting machine, screening, and storing the aggregate in a hot storage bin for later use.
10. The method of claim 8, wherein S2 is the aggregate added to the asphalt mixture stirring cylinder in proportion by a hot aggregate weighing system.
Priority Applications (1)
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106904871A (en) * | 2017-02-15 | 2017-06-30 | 上海浦东路桥建设股份有限公司 | Draining reclaimed asphalt mixture and its mixing proportion design method |
| CN108623207A (en) * | 2018-06-11 | 2018-10-09 | 江苏金阳新材料科技有限公司 | A kind of asphalt anti-stripping agent and its application method of phosphate ester-containing salt |
| CN110078417A (en) * | 2019-06-06 | 2019-08-02 | 中国水利水电第七工程局有限公司 | A kind of anti-rutting asphalt mixture mixing proportion design method |
| CN112250347A (en) * | 2020-10-24 | 2021-01-22 | 中铁十六局集团路桥工程有限公司 | Asphalt concrete suitable for low-heat valley areas and preparation method thereof |
| CN112646321A (en) * | 2020-12-23 | 2021-04-13 | 镇江蓝舶科技股份有限公司 | Asphalt pavement rapid repairing reinforcing material and preparation method thereof |
| CN219308612U (en) * | 2023-03-09 | 2023-07-07 | 长沙西交建设工程有限公司 | Stirring device for manufacturing asphalt mixture |
-
2025
- 2025-09-02 CN CN202511241466.5A patent/CN120736848A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106904871A (en) * | 2017-02-15 | 2017-06-30 | 上海浦东路桥建设股份有限公司 | Draining reclaimed asphalt mixture and its mixing proportion design method |
| CN108623207A (en) * | 2018-06-11 | 2018-10-09 | 江苏金阳新材料科技有限公司 | A kind of asphalt anti-stripping agent and its application method of phosphate ester-containing salt |
| CN110078417A (en) * | 2019-06-06 | 2019-08-02 | 中国水利水电第七工程局有限公司 | A kind of anti-rutting asphalt mixture mixing proportion design method |
| CN112250347A (en) * | 2020-10-24 | 2021-01-22 | 中铁十六局集团路桥工程有限公司 | Asphalt concrete suitable for low-heat valley areas and preparation method thereof |
| CN112646321A (en) * | 2020-12-23 | 2021-04-13 | 镇江蓝舶科技股份有限公司 | Asphalt pavement rapid repairing reinforcing material and preparation method thereof |
| CN219308612U (en) * | 2023-03-09 | 2023-07-07 | 长沙西交建设工程有限公司 | Stirring device for manufacturing asphalt mixture |
Non-Patent Citations (2)
| Title |
|---|
| 李玫等: "水泥替代矿粉对水工沥青混凝土长期性能影响研究", 《岩土工程学报》, 31 May 2017 (2017-05-31), pages 74 - 78 * |
| 黄开宇等: "抗车辙骨架密实性沥青混合料配合比设计方法研究", 《公路工程》, 28 February 2010 (2010-02-28), pages 88 - 94 * |
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