CN218596797U - Composite anti-cracking noise-reducing durable asphalt pavement structure - Google Patents
Composite anti-cracking noise-reducing durable asphalt pavement structure Download PDFInfo
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- CN218596797U CN218596797U CN202222924096.3U CN202222924096U CN218596797U CN 218596797 U CN218596797 U CN 218596797U CN 202222924096 U CN202222924096 U CN 202222924096U CN 218596797 U CN218596797 U CN 218596797U
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Abstract
The utility model discloses a composite type is anti to split and is fallen durable bituminous paving structure of making an uproar, it includes base course, tie coat, rubber granule asphalt concrete layer, high-modulus asphalt concrete layer and the wearing and tearing layer that covers in proper order down according to supreme order. The rubber particle asphalt concrete layer contains large-particle rubber which can be filled into the skeleton gap of the coarse aggregate, and the vibration absorption capacity of the rubber particles is greatly increased compared with that of rubber asphalt, so that the flexibility of the asphalt concrete is greatly improved, and the asphalt concrete has large deformation capacity, so that the reflection cracks can be effectively prevented, and the rubber particle asphalt concrete layer has a strong absorption effect on vibration in the vehicle driving process, is low in driving noise, can consume a large amount of waste tires, and protects the environment; the high-modulus asphalt concrete layer has high strength, strong load bearing capacity and high durability; the wearing and tearing layer has wear-resisting loss, the utility model discloses can fully synthesize the advantage of each structural layer of performance, realize that the road surface structure has the advantage of anti splitting, falling the noise, durable etc..
Description
Technical Field
The utility model belongs to the technical field of the road surface, concretely relates to anti durable bituminous pavement structure of making an uproar that falls that splits of combined type.
Background
The urban traffic volume is large, and the noise problem is prominent. The low noise road surface can effectively reduce road surface noise, promotes citizen's trip and experiences. The current low-noise pavement technology mainly comprises a porous drainage pavement, an SMA pavement, an ultrathin asphalt wearing layer and the like.
The porous drainage pavement utilizes the higher porosity to reduce the air pumping effect, and meanwhile, the void structure enhances the noise absorption, but the pavement void structure is easy to block, poor in durability, difficult to maintain and fast in attenuation of the noise reduction effect.
The SMA pavement is a pavement paved by dense asphalt mixture formed by filling asphalt mastic composed of asphalt, mineral powder, fiber stabilizer and fine aggregate in the gap of the framework of the discontinuous-graded coarse aggregate. The SMA road surface utilizes the good surface structure to reduce noise, but the noise reduction effect is poor, and the manufacturing cost is high.
The rubber asphalt pavement utilizes the high elasticity of rubber to absorb vibration and reduce noise, the general pavement thickness is 4-5cm, the manufacturing cost is higher, and the environmental protection problem exists; the ultrathin asphalt wearing layer reduces the noise by improving the surface smoothness and reducing the vibration of the tire, but the noise reduction effect is not obvious.
In view of the above problems, it is urgently needed to develop a pavement structure with crack resistance, noise reduction and durability to meet the use requirements.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, an object of the present invention is to provide a composite anti-crack noise-reduction durable asphalt pavement structure and an implementation method thereof.
In order to achieve the above purpose, the utility model provides a technical scheme is:
the composite anti-cracking noise-reducing durable asphalt pavement structure comprises a base layer, a bonding layer, a rubber particle asphalt concrete layer, a high-modulus asphalt concrete layer and an abrasion layer, wherein the bonding layer, the rubber particle asphalt concrete layer, the high-modulus asphalt concrete layer and the abrasion layer are sequentially covered on the base layer from bottom to top.
The utility model discloses an implementation method of resistant bituminous paving structure of making an uproar falls in anticracking of combined type, it includes following step:
s1: performing bonding material construction on the base layer to form a bonding layer;
s2: carrying out rubber particle asphalt concrete material construction on the bonding layer, after paving and leveling, carrying out static pressure when the pavement is cooled to be below 80 ℃ to form a rubber particle asphalt concrete layer, wherein the thickness of the rubber particle asphalt concrete layer is preferably 1-4 cm;
s3: after the rubber particle asphalt concrete layer is cooled for more than 24 hours in the step S2, performing high-modulus asphalt concrete material construction on the rubber particle asphalt concrete layer to form a high-modulus asphalt concrete layer, wherein the thickness of the high-modulus asphalt concrete layer is preferably 4-10 cm;
s4: and (S3) cooling the high-modulus asphalt concrete layer to below 50 ℃, and then constructing an abrasion layer on the high-modulus asphalt concrete layer to obtain the composite anti-cracking noise-reducing durable asphalt pavement structure. The thickness of the wearing layer is preferably 1.5-5 cm.
The rubber particle asphalt concrete layer can absorb vibration and inhibit reflection cracks; the high-modulus asphalt concrete layer is high in strength, strong in load bearing capacity and high in durability; the wearing and tearing layer has wear-resisting loss, the utility model discloses the anti durable bituminous paving structure of making an uproar that falls of split of combined type can effectively exert each layer advantage, has the advantage of anti splitting, falling the noise, durable etc..
As an optimized scheme of the utility model, the basic unit can be cement concrete layer, cement stabilized rubble layer or asphalt concrete layer etc.. The bonding layer is a rubber asphalt layer, a modified asphalt waterproof bonding layer or a modified emulsified asphalt layer and the like. Specifically, when the base layer is a cement concrete layer or an asphalt stabilized rubble layer, the bonding layer is preferably modified emulsified asphalt; when the base layer is a cement concrete layer or a cement stabilized gravel layer, the bonding layer may preferably be a rubber asphalt (SBS modified asphalt) waterproof bonding layer.
As an optimal scheme of the utility model, rubber granule asphalt concrete material can directly purchase or oneself is prepared, and the batching is including the rubble of coarse aggregate, fine aggregate machine system sand, filler powdered ore, pitch, rubber granule and modifier, and the preferred rubble of coarse aggregate that adopts the particle diameter to be 5 ~ 10mm is the aggregate, and rubber granule's weight accounts for 5% ~ 25% of rubber granule asphalt concrete material total weight, rubber granule asphalt concrete layer's 15 ℃ elastic modulus <1500Mpa.
The coarse aggregate macadam, the fine aggregate machine sand, the filler mineral powder and the asphalt all meet the requirements of the current highway asphalt pavement construction technical specifications. The grading composition is referred to AC grading, and the optimal asphalt dosage is determined by referring to Marshall target mixing ratio test method.
The rubber particles are preferably rubber particles which are obtained by crushing waste tires and do not contain impurities such as metal and the like, the particle size of the rubber particles is 3-8 mm, preferably 5-8 mm, and the technical indexes are shown in the table 1. The rubber particles with the thicker particle size have stronger absorption capacity to vibration than rubber powder.
TABLE 1 rubber particle specifications
| Test items | Index (I) |
| Raw material | Tread rubber |
| Percent moisture content (percent) | 0.75 |
| Apparent density (t/m 3) < | 1.15 |
| Fiber content (%), (not higher) | 0.75 |
| The content (%) of natural rubber, | 15-30 |
| content (%) of elongated flat particles | 10 |
| Higher or lower Shore A hardness | 55 |
| Modulus of elasticity (MPa), > | 9.5 |
The modifier is a low-melting-point thermoplastic elastomer, and can improve the cohesiveness and the strength of the rubber particle flexible asphalt concrete. The modifier plays a role in improving the bonding performance of the cementing material to the asphalt mixture and increasing the strength of the rubber particle flexible asphalt concrete, and the performance indexes of the modifier are shown in table 2.
TABLE 2 modifier Performance index
| Item | Unit | Technical requirements | Experimental methods |
| Appearance of the product | - | Granular, uniform and full | - |
| Mass of single particle | g | ≤0.015 | - |
| Density of | g/cm 3 | 0.85～0.99 | GB1033 |
| Melt index (135 ℃,2.16 kg) | g/10min | ≥3 | GB/T3682 |
| Ash content | ％ | ≤1 | JTGE20T0614 |
| Elongation at break | ％ | >800 | GB/T1040 |
| 25 ℃, definite elongation of 500 percent and rebound resilience for 1min | ％ | >90 | - |
The thickness of the selected rubber particle asphalt concrete material, the size of the rubber particles and the addition amount can ensure the balance of stress absorption, noise reduction and durability.
The production method of the rubber particle asphalt concrete material comprises the following steps of firstly adding coarse aggregate crushed stone, fine aggregate machine sand making, rubber particles and a modifier according to design gradation for dry mixing for 5-20 s, so that the modifier is fully melted, dispersed and partially combined with the rubber particles and the aggregate to fully exert the modification effect; then adding asphalt and filler mineral powder, uniformly mixing, and keeping the temperature for more than 1 h. Under the catalytic action of high temperature, asphalt, rubber particles and additives fully react, the surface of the rubber particles and asphalt are subjected to swelling action, active ingredients such as crosslinking agents sulfur, anti-aging agents and other additives in the rubber particles enter the asphalt through interface exchange, so that the asphalt is more viscous, a modifier is fully fused with the asphalt, the binding force of the asphalt and the rubber particles is improved, the asphalt and the rubber particles are closely combined together in a microcosmic state, a rubber particle asphalt concrete layer with strong elasticity and large damping is formed, when the structural layer is acted by external force, the rubber particles and an asphalt binding layer can deform greatly, and when the external force is removed, the deformed rubber particles and asphalt binding material gradually recover in situ, and vibration can be fully absorbed; when cracks appear on the base layer, the rubber particle asphalt concrete layer can slowly release stress caused by the cracks on the base layer, and the reflection cracks of the pavement caused by stress concentration are avoided.
The construction of the rubber particle asphalt concrete layer is almost the same as that of a common asphalt mixture, the common asphalt mixture is firstly paved, and then a double-steel-wheel road roller is used for vibration compaction, wherein the difference is that when the temperature is reduced to be below 80 ℃, a large-tonnage tire road roller is used for secondary compaction so as to reduce the compaction deficiency caused by the elasticity of the rubber particles.
The thickness of the rubber particle asphalt concrete layer is set to be 1-4 cm, so that on one hand, the absorption of the flexible layer on vehicle vibration and the absorption of the base layer on micro strain are ensured; on the other hand, the total deformation of the flexible asphalt concrete layer is limited within a certain range, so that the whole pavement is prevented from generating fatigue cracking due to large strain.
High modulus asphalt concrete layer does the utility model discloses the load layer of the anti durable asphalt pavement structure of making an uproar that falls of combined type is split for bear the driving load. The dynamic modulus at 15 ℃ is required to be higher than 12000MPa, the dynamic modulus at 45 ℃ is required to be higher than 2500MPa, the dynamic stability is required to be higher than 8000 times/mm (60 ℃,0.7 MPa), and the method can be realized by adopting the technologies of low-grade asphalt, high-modulus additives and the like. The high-modulus asphalt concrete layer with higher strength modulus is arranged on the rubber particle asphalt concrete layer, so that the main body strength of the pavement can be ensured.
And the construction of the high modulus asphalt concrete layer needs to be carried out after the rubber particle asphalt concrete layer is completely cooled. The construction of the high modulus asphalt concrete material can be carried out according to normal requirements.
The wearing layer is preferably made of high-strength wear-resistant stones, and the crushing value is lower than 20%; the asphalt cementing material adopts modified asphalt, the softening point is higher than 65 ℃, and the ductility (5 ℃) is higher than 30cm, so as to ensure enough binding power and fatigue cracking resistance.
The utility model has the advantages that: the utility model provides a formula of the durable bituminous pavement structure of combined type anti splitting noise reduction reasonable in design, rubber granule asphalt concrete layer contains large granule rubber, can fill in the skeleton space of coarse aggregate, and rubber granule absorbs vibration ability and increases greatly than rubber asphalt, makes asphalt concrete flexibility promote by a wide margin, has great deformability, can effectively prevent reflection crack on the one hand, on the other hand has stronger absorption effect to the vibration in the vehicle driving process, and the driving noise is low, can consume a large amount of junked tires moreover, protects the environment; the high-modulus asphalt concrete layer has high strength, strong load bearing capacity and high durability; the wearing and tearing layer has wear-resisting loss, the utility model discloses can fully synthesize the advantage of each structural layer of performance, realize that the road surface structure has the advantage of anti splitting, falling the noise, durable etc..
The invention is further explained by the accompanying drawings and examples.
Drawings
Fig. 1 is the structural schematic diagram of the composite anti-cracking noise-reducing durable asphalt pavement structure.
Fig. 2 is the structure schematic diagram of the rubber particle asphalt concrete layer of the utility model.
Detailed Description
s1: the base layer 1 is provided with a bonding layer. The base layer 1 is made of cement concrete, and the bonding layer 2 is a rubber asphalt waterproof bonding layer. The spreading amount of the rubber asphalt is 1.8-2.2kg/m 2 The spreading amount of the crushed stone with the particle size of 5-10 mm is 6-8 kg/m 2 The coverage rate is 60-70%;
s2: and after the construction of the bonding layer 2 is completed, carrying out the construction of the rubber particle asphalt concrete layer 3 after the next construction condition is met. The rubber particle asphalt concrete material selects basalt with the particle size of 5-10 mm as a coarse aggregate and machine-made sand with the particle size of 0-3 mm as a fine aggregate; limestone mineral powder is used as a filler; waste tire rubber particles with the particle size of 5-8 mm, and ZTA-VE as a mixture modifier; 70A road petroleum asphalt is used as asphalt cementing material. Basalt: and (3) machining sand: mineral powder: rubber particles: ZTA-VE: the weight ratio of the asphalt is 70:15:5:10:0.4:6.
the mixing process comprises the following steps: heating basalt and machine-made sand to 180 ℃, and heating 70A asphalt to 150 ℃; adding basalt, machine-made sand, ZTA-VE and rubber particles into a mixing pot, dry mixing for 5-30 s, adding asphalt and mineral powder, mixing for 30-60 s, discharging, and keeping the temperature for more than 1 h.
The common paver is adopted to pave the rubber particle asphalt concrete material, the thickness is 3cm, and the paving construction is the same as that of the common asphalt mixture. And (2) rolling by adopting a double-steel-wheel road roller, wherein the rolling process comprises firstly carrying out static pressure, then carrying out vibration compaction, and then carrying out static pressure when the temperature is reduced to a range of 60-80 ℃ to obtain the rubber particle asphalt concrete layer, which is shown in figure 2, wherein 31 is a mixture of coarse aggregate, 32 is fine aggregate, 33 is rubber particles, and 34 is a modifier and an asphalt cementing material in figure 2.
S3: and after the rubber particle asphalt concrete layer 3 is paved for 24 hours, constructing the high modulus asphalt concrete layer 4. The high modulus asphalt concrete material is AC-20 gradation, limestone meeting the specification requirements is adopted for each grade of aggregate, and the high modulus additive is added to ensure that the index meets the requirements of 15 ℃ dynamic modulus of 12000MPa,45 ℃ dynamic modulus of 2500MPa and dynamic stability of 8000 times/mm (60 ℃,0.7 MPa). Constructing according to the technical requirement of the high-modulus asphalt concrete, wherein the construction thickness is 6cm, and obtaining a high-modulus asphalt concrete layer 4;
s4: and when the temperature of the high-modulus asphalt concrete layer 4 is reduced to below 50 ℃, constructing the wearing layer 5. The wearing layer 5 adopts basalt with the grain diameter of 5-10 mm to ensure the wear resistance of the pavement; and (3) adopting high-viscosity modified asphalt, executing the construction process according to related industrial standards, and obtaining the wearing layer 5 with the construction thickness of 3 cm.
Embodiment 2, this embodiment provides a composite anti-cracking noise-reducing durable asphalt pavement structure, which is the same as the structure in embodiment 1, and the specific implementation steps are as follows:
s1: the adhesive layer 2 is formed on the base layer 1. The base layer 1 is made of cement concrete, the base layer 1 is made of cement stabilized macadam, and the bonding layer 2 is a rubber asphalt waterproof bonding layer. The spreading amount of the rubber asphalt is 2.0-2.2 kg/m 2 The spreading amount of the crushed stones with the particle size of 5-10 mm is 6-8 kg/m 2 The coverage rate is 60-70%;
s2: and after the construction of the bonding layer 2 is completed, carrying out the construction of the rubber particle asphalt concrete layer 3 after the next construction condition is met. The rubber particle asphalt concrete material adopts basalt with the particle size of 5-10 mm as a coarse aggregate 31 and machine-made sand with the particle size of 0-3 mm as a fine aggregate 32; limestone mineral powder is used as a filler; waste tire rubber particles with the particle size of 3-6 mm, and ZTA-VE as a mixture modifier; 70A road petroleum asphalt is used as asphalt cementing material. Basalt: and (3) machining sand: mineral powder: rubber particles: ZTA-VE: the weight ratio of the asphalt is 70:8:5:15:0.4:6.5.
the mixing process comprises the following steps: heating basalt and machine-made sand to 180 ℃, and heating 70A asphalt to 150 ℃; adding basalt, machine-made sand, ZTA-VE and rubber particles into a stirring pot, dry-stirring for 30s, adding asphalt and mineral powder, stirring for 40s, discharging, and keeping the temperature for more than 1 h.
The common paver is adopted to pave rubber particle asphalt concrete materials with the thickness of 2cm, and the paving construction is the same as that of common asphalt mixtures. Rolling by a double-steel-wheel road roller, wherein the rolling process comprises static pressure, vibration compaction and static pressure when the temperature is reduced to 60-80 ℃;
s3: and after the rubber particle asphalt concrete layer 3 is paved for 24 hours, constructing the high modulus asphalt concrete layer 4. The high modulus asphalt concrete material is AC-16 graded, limestone meeting the specification requirements is adopted for each grade of aggregate, and the high modulus additive is added to ensure that the index meets the requirements of 15 ℃ dynamic modulus of 12000MPa,45 ℃ dynamic modulus of 2500MPa and dynamic stability of 8000 times/mm (60 ℃,0.7 MPa). Constructing according to the technical requirement of the high-modulus asphalt concrete, wherein the construction thickness is 8cm, and obtaining a high-modulus asphalt concrete layer 4;
s4: and when the temperature of the high-modulus asphalt concrete layer 4 is reduced to below 50 ℃, constructing the wearing layer 5. The wearing layer 5 adopts basalt with the grain diameter of 5-10 mm to ensure the wear resistance of the pavement; and (3) adopting high-viscosity modified asphalt, executing the construction process according to related industrial standards, and obtaining the wearing layer 5 with the construction thickness of 2 cm.
Embodiment 3, this embodiment provides a composite anti-cracking noise-reducing durable asphalt pavement structure, which is the same as the structure in embodiment 1, and the specific implementation steps are as follows:
s1: the adhesive layer 2 is formed on the base layer 1. The base layer 1 is cement stabilized macadam, the bonding layer 2 is SBS modified asphalt waterproof bonding layer, the spraying amount of SBS modified asphalt is 1.6-1.8kg/m 2 The spreading amount of the crushed stone with the particle size of 5-10 mm is 6-8 kg/m 2 The coverage rate is 60-70%;
s2: and after the construction of the bonding layer 2 is completed, carrying out the construction of the rubber particle asphalt concrete layer 3 after the next construction condition is met. The rubber particle asphalt concrete material adopts basalt with the particle size of 5-10 mm as a coarse aggregate 31 and machine-made sand with the particle size of 0-3 mm as a fine aggregate 32; limestone mineral powder is used as a filler; waste tire rubber particles with the particle size of 3-6 mm, and ZTA-VE as a mixture modifier; 70A road petroleum asphalt is used as asphalt cementing material. Basalt: and (3) machining sand: mineral powder: rubber particles: ZTA-VE: the weight ratio of the asphalt is 70:5:5:15:0.6:6.5.
the mixing process comprises the following steps: heating basalt and machine-made sand to 180 ℃, and heating 70A asphalt to 150 ℃; adding basalt, machine-made sand, ZTA-VE and rubber particles into a stirring pot, dry-stirring for 15s, adding asphalt and mineral powder, stirring for 35s, discharging, and keeping the temperature for more than 1 h.
The common paver is adopted to pave the rubber particle asphalt concrete material with the thickness of 2cm, and the paving construction is the same as that of the common asphalt mixture. Rolling by a double-steel-wheel road roller, wherein the rolling process comprises static pressure, vibration compaction and static pressure when the temperature is reduced to 60-80 ℃;
s3: and after the rubber particle asphalt concrete layer 3 is paved for 24 hours, constructing the high modulus asphalt concrete layer 4. The high modulus asphalt concrete material is AC-16 graded, limestone meeting the specification requirements is adopted for each grade of aggregate, and the high modulus additive is added to ensure that the index meets the requirements of 15 ℃ dynamic modulus of 12000MPa,45 ℃ dynamic modulus of 2500MPa and dynamic stability of 8000 times/mm (60 ℃,0.7 MPa). Constructing according to the technical requirement of the high-modulus asphalt concrete, wherein the construction thickness is 8cm, and obtaining a high-modulus asphalt concrete layer 4;
s4: and when the temperature of the high-modulus asphalt concrete layer 4 is reduced to below 50 ℃, constructing the wearing layer 5. The wearing layer 5 adopts basalt with the grain diameter of 5-10 mm to ensure the wear resistance of the pavement; and (3) adopting high-viscosity modified asphalt, executing the construction process according to related industrial standards, and obtaining the wearing layer 5 with the construction thickness of 2 cm.
s1: the adhesive layer 2 is formed on the base layer 1. The base layer 1 is asphalt concrete AC-25, and the bonding layer 2 is SBS modified emulsified asphalt (solid content)>50%) and the amount of sprinkling was 0.5kg/m 2 。
S2: and after the construction of the bonding layer 2 is completed, carrying out the construction of the rubber particle asphalt concrete layer 3 after the next construction condition is met. The rubber particle asphalt concrete material adopts basalt with the particle size of 5-10 mm as a coarse aggregate 31 and machine-made sand with the particle size of 0-3 mm as a fine aggregate 32; limestone mineral powder is used as a filler; waste tire rubber particles with the particle size of 3-8 mm, and ZTA-VE as a mixture modifier; 70A road petroleum asphalt is used as asphalt cementing material. Basalt: and (3) machining sand: mineral powder: rubber particles: ZTA-VE: the weight ratio of the asphalt is 63:5:7:20:1:7.
the mixing process comprises the following steps: heating basalt and machine-made sand to 180 ℃, and heating 70A asphalt to 150 ℃; adding basalt, machine-made sand, ZTA-VE and rubber particles into a stirring pot, dry-stirring for 20s, adding asphalt and mineral powder, stirring for 50s, discharging, and keeping the temperature for more than 1 h.
The common paver is adopted to pave the rubber particle asphalt concrete material with the thickness of 1.5cm, and the paving construction is the same as that of the common asphalt mixture. Rolling by a double-steel-wheel road roller, wherein the rolling process comprises firstly carrying out static pressure, then carrying out vibration compaction, and carrying out static pressure when the temperature is reduced to the range of 60-80 ℃;
s3: and after the rubber particle asphalt concrete layer 3 is paved for 24 hours, constructing the high modulus asphalt concrete layer 4. The high modulus asphalt concrete material is AC-16 graded, limestone meeting the specification requirements is adopted for each grade of aggregate, and the high modulus additive is added to ensure that the index meets the requirements of 15 ℃ dynamic modulus of 12000MPa,45 ℃ dynamic modulus of 2500MPa and dynamic stability of 8000 times/mm (60 ℃,0.7 MPa). Constructing according to the technical requirement of the high-modulus asphalt concrete, wherein the construction thickness is 4cm, and obtaining a high-modulus asphalt concrete layer 4;
s4: and when the temperature of the high-modulus asphalt concrete layer 4 is reduced to below 50 ℃, constructing the wearing layer 5. The wearing layer 5 adopts basalt with the grain diameter of 5-10 mm to ensure the wear resistance of the pavement; and (3) adopting high-viscosity modified asphalt, executing the construction process according to related industrial standards, and obtaining the wearing layer 5 with the construction thickness of 2 cm.
Comparative example 1: the cement concrete base layer same as the embodiments 1 and 2 is a rubber asphalt waterproof bonding layer, the bonding layer is the same as the embodiment 1, and the surface layer is modified asphalt SMA-13+8cmAC-25 with the thickness of 4cm.
Comparative example 2: the same cement stabilized macadam foundation as the embodiment 3, the bonding layer is SBS modified asphalt, the same as the embodiment 3, and the surface layer is modified asphalt SMA-13+8cm AC-25 with the thickness of 4cm.
Comparative example 3: the asphalt stabilized macadam foundation layer is the same as the asphalt stabilized macadam foundation layer in example 4, the bonding layer is SBR modified emulsified asphalt, the bonding layer is the same as the asphalt stabilized macadam foundation layer in example 4, and the surface layer is modified asphalt SMA-13+5cmAC-16 with the thickness of 3 cm.
TABLE 3 road surface conditions of different road surface structures
The results of the road surface PCI, the road side running noise (80 km), and the number of cracks were obtained for each road section, for 2 years of traffic, and for 4 years of traffic, respectively, and are shown in table 3. It can be seen from the data of table 3 that the utility model provides a road surface structure compares with conventional road surface structure, has anti, falls the noise and durable characteristics of splitting.
Variations and modifications to the above-described embodiments may occur to those skilled in the art, in light of the above teachings and teachings. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should fall within the protection scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation. If the utility model discloses above-mentioned embodiment, adopt rather than the same or similar structure and other road surface structures that obtain, all be in the utility model discloses protection scope.
Claims (8)
1. The composite anti-cracking noise-reducing durable asphalt pavement structure comprises a base layer and is characterized by further comprising a bonding layer, a rubber particle asphalt concrete layer, a high-modulus asphalt concrete layer and an abrasion layer, wherein the bonding layer, the rubber particle asphalt concrete layer, the high-modulus asphalt concrete layer and the abrasion layer are sequentially covered on the base layer from bottom to top.
2. The composite anti-cracking noise-reducing durable asphalt pavement structure according to claim 1, wherein the thickness of the rubber particle asphalt concrete layer is 1-4 cm.
3. The composite anti-cracking noise-reducing durable asphalt pavement structure according to claim 1 or 2, wherein the rubber particles in the rubber particle asphalt concrete layer have a particle size of 3-8 mm.
4. The composite anti-cracking noise-reducing durable asphalt pavement structure according to claim 1, wherein the thickness of the high-modulus asphalt concrete layer is 4-10 cm.
5. The composite anti-cracking noise-reducing durable asphalt pavement structure according to claim 1, wherein the wearing layer is a wear-resistant stone layer.
6. The composite anti-cracking noise-reducing durable asphalt pavement structure according to claim 1 or 5, wherein the wearing layer has a thickness of 1.5-5 cm.
7. The composite anti-cracking noise-reducing durable asphalt pavement structure according to claim 1, wherein the base layer is one of a cement concrete layer, a cement stabilized gravel layer or an asphalt concrete layer.
8. The composite anti-cracking noise-reducing durable asphalt pavement structure according to claim 7, wherein the bonding layer is a rubber asphalt layer, a modified asphalt waterproof bonding layer or a modified emulsified asphalt layer.
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