CN117988182A - Composite anti-cracking noise-reducing durable asphalt pavement structure and implementation method thereof - Google Patents
Composite anti-cracking noise-reducing durable asphalt pavement structure and implementation method thereof Download PDFInfo
- Publication number
- CN117988182A CN117988182A CN202211369693.2A CN202211369693A CN117988182A CN 117988182 A CN117988182 A CN 117988182A CN 202211369693 A CN202211369693 A CN 202211369693A CN 117988182 A CN117988182 A CN 117988182A
- Authority
- CN
- China
- Prior art keywords
- layer
- asphalt
- asphalt concrete
- rubber
- concrete layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010426 asphalt Substances 0.000 title claims abstract description 103
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000002131 composite material Substances 0.000 title claims abstract description 22
- 238000005336 cracking Methods 0.000 title claims abstract description 15
- 239000011384 asphalt concrete Substances 0.000 claims abstract description 98
- 229920001971 elastomer Polymers 0.000 claims abstract description 94
- 239000005060 rubber Substances 0.000 claims abstract description 94
- 239000002245 particle Substances 0.000 claims abstract description 84
- 238000010276 construction Methods 0.000 claims description 55
- 239000008187 granular material Substances 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 23
- 239000004568 cement Substances 0.000 claims description 19
- 230000003068 static effect Effects 0.000 claims description 10
- 239000004575 stone Substances 0.000 claims description 9
- 239000004567 concrete Substances 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 3
- 239000011230 binding agent Substances 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 9
- 230000009467 reduction Effects 0.000 abstract description 9
- 238000010521 absorption reaction Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 6
- 239000010920 waste tyre Substances 0.000 abstract description 6
- 238000005299 abrasion Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 119
- 239000004576 sand Substances 0.000 description 19
- 239000000843 powder Substances 0.000 description 17
- 229910052500 inorganic mineral Inorganic materials 0.000 description 16
- 239000011707 mineral Substances 0.000 description 16
- 239000000203 mixture Substances 0.000 description 15
- 239000003607 modifier Substances 0.000 description 13
- 238000003756 stirring Methods 0.000 description 12
- 235000019738 Limestone Nutrition 0.000 description 8
- 239000012790 adhesive layer Substances 0.000 description 8
- 239000006028 limestone Substances 0.000 description 8
- 238000005096 rolling process Methods 0.000 description 8
- 239000000654 additive Substances 0.000 description 7
- 238000005056 compaction Methods 0.000 description 7
- 239000000945 filler Substances 0.000 description 7
- 238000003892 spreading Methods 0.000 description 7
- 230000007480 spreading Effects 0.000 description 7
- 238000002156 mixing Methods 0.000 description 5
- 230000000996 additive effect Effects 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 239000003208 petroleum Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000013521 mastic Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007580 dry-mixing Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 230000002522 swelling effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
Landscapes
- Road Paving Structures (AREA)
Abstract
The invention discloses a composite anti-cracking noise-reduction durable asphalt pavement structure which comprises a base layer, a bonding layer, a rubber particle flexible asphalt concrete layer, a high-modulus asphalt concrete layer and a small-particle-size wearing layer which are sequentially covered from bottom to top. The large-particle rubber with the particle size of 3-8 mm is added into the rubber particle flexible asphalt concrete layer, so that the asphalt concrete flexibility is greatly improved, the asphalt concrete has larger deformability, on one hand, reflection cracks can be effectively prevented, on the other hand, the asphalt concrete has stronger absorption effect on vibration in the driving process of a vehicle, the driving noise is low, a large amount of waste tires can be consumed, and the environment is protected; the high-modulus asphalt concrete layer has high strength, strong load bearing capacity and high durability; the small-grain-size wearing layer has abrasion resistance, the advantages of each structural layer can be fully and comprehensively exerted, and the pavement structure has the advantages of crack resistance, noise reduction, durability and the like.
Description
Technical Field
The invention belongs to the technical field of pavements, and particularly relates to a composite anti-cracking noise-reduction durable asphalt pavement structure and an implementation method.
Background
The urban traffic is large and the noise problem is prominent. The low noise road surface can effectively reduce road surface noise, promotes citizen's experience of traveling. The prior low noise pavement technology mainly comprises porous drainage pavement, SMA pavement, ultrathin asphalt wearing layer and the like.
The porous drainage pavement utilizes the higher porosity to reduce the pumping effect of air, and the void structure enhances the absorption of noise, but the pavement void structure is easy to be blocked, has poor durability and difficult maintenance, and the noise reduction effect is fast to attenuate.
The SMA pavement is a pavement paved by asphalt mastic consisting of asphalt, mineral powder, fiber stabilizer and fine aggregate, and the asphalt mastic is filled in the skeleton gaps of the gap graded coarse aggregate to form a compact asphalt mixture. The SMA pavement utilizes the good surface structure to reduce noise, but has poor noise reduction effect and high manufacturing cost.
The rubber asphalt pavement utilizes the high elasticity of rubber to absorb vibration and reduce noise, the paving thickness is generally 4-5cm, the manufacturing cost is high, and the environmental protection problem exists; the ultrathin asphalt wearing layer reduces the noise by improving the surface flatness and reducing the vibration of the tire, but the noise reduction effect is not obvious.
In view of the above, there is an urgent need to develop a pavement structure with crack resistance, noise reduction, and durability to meet the use requirements.
Disclosure of Invention
The invention aims to provide a composite anti-cracking noise-reduction durable asphalt pavement structure and an implementation method thereof.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows:
The utility model provides a durable bituminous pavement structure of making an uproar falls in compound type anticracking, its includes basic unit, tie coat, rubber granule flexible asphalt concrete layer, high modulus asphalt concrete layer and small diameter wearing and tearing layer cover in proper order from down on the basic unit.
The implementation method of the composite anti-cracking noise-reduction durable asphalt pavement structure comprises the following steps:
s1: carrying out binder construction on the base layer to form a binding layer;
S2: carrying out construction of rubber particle flexible asphalt concrete materials on the bonding layer, and carrying out static pressure when the pavement is cooled to below 80 ℃ after paving is smooth to form a rubber particle flexible asphalt concrete layer, wherein the thickness of the rubber particle flexible asphalt concrete layer is 1-4 cm;
S3: after the rubber particle flexible 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 flexible asphalt concrete layer to form a high-modulus asphalt concrete layer, wherein the thickness of the high-modulus asphalt concrete layer is 4-10 cm;
S4: and in the step S3, the high-modulus asphalt concrete layer is cooled to below 50 ℃, and then the construction of a small-particle-size wearing layer is carried out on the high-modulus asphalt concrete layer, so that the composite anti-cracking noise-reduction durable asphalt pavement structure is obtained. The thickness of the small-particle-size wearing layer is 1.5-5 cm.
The rubber particle flexible asphalt concrete layer can absorb vibration and inhibit reflection cracks; the high-modulus asphalt concrete layer has high strength, strong load bearing capacity and high durability; the small-particle-size wearing layer has abrasion resistance, and the composite anti-cracking noise-reduction durable asphalt pavement structure can effectively exert the advantages of each layer and has the advantages of cracking resistance, noise reduction, durability and the like.
As a preferred embodiment of the present invention, the base layer may be a cement concrete layer, a cement stabilized crushed stone layer, an asphalt concrete layer, or the like. The bonding layer is a rubber asphalt layer, a modified asphalt waterproof bonding layer or a modified emulsified asphalt layer and the like. In particular, when the base layer is a cement concrete layer or an asphalt stabilized macadam 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 adhesive layer may preferably be a rubber asphalt (SBS modified asphalt) waterproof adhesive layer.
As a preferable scheme of the invention, the rubber particle flexible asphalt concrete material comprises coarse aggregate crushed stone, fine aggregate machine-made sand, filler mineral powder, asphalt, rubber particles and a modifier, wherein the coarse aggregate crushed stone with the particle size of 5-10 mm is adopted as aggregate, the weight of the rubber particles accounts for 5% -25% of the total weight of the rubber particle flexible asphalt concrete material, and the 15 ℃ elastic modulus of the rubber particle flexible asphalt concrete layer is less than 1500Mpa.
The coarse aggregate crushed stone, the fine aggregate machine-made 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 referenced to the AC grading, and the optimal asphalt dosage is determined by reference to the Marshall target mix test method.
The rubber particles are preferably colloidal particles which are obtained by crushing waste tires and are free of impurities such as metal, the particle size of the colloidal particles is 3-8 mm, preferably 5-8 mm, and the technical index requirements are shown in table 1. The rubber particles with coarser particle sizes have stronger absorption capacity to vibration than the rubber powder.
TABLE 1 rubber particle specification
| Test item | Index (I) |
| Raw materials | Tread rubber |
| Moisture content (%), no more than | 0.75 |
| Apparent density (t/m 3) < | 1.15 |
| Fiber content (%), -no more | 0.75 |
| Natural rubber content (%), | 15-30 |
| Elongated flat particle content (%), no more than | 10 |
| Shore hardness A, lower | 55 |
| Elastic modulus (MPa) > | 9.5 |
The modifier is a low-melting-point thermoplastic elastomer, and can improve the cohesiveness and strength of the rubber particle flexible asphalt concrete. The modifier plays a role in improving the binding property of the cementing material to the asphalt mixture and increasing the strength of the rubber particle flexible asphalt concrete, and the performance index of the modifier is shown in table 2.
TABLE 2 modifier Performance index
| Project | Unit (B) | Technical requirements | Experimental method |
| Appearance of | - | Granular, even and full | - |
| Mass of single granule | g | ≤0.015 | - |
| Density of | g/cm3 | 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 |
| Setting and stretching at 25 ℃ to 500 percent and rebound rate of 1min | ％ | >90 | - |
The thickness of the selected rubber particle flexible asphalt concrete material, the size of the rubber particle and the addition amount can ensure the balance of stress absorption, noise reduction and durability.
The flexible asphalt concrete material with rubber particles is produced by adding coarse aggregate broken stone, fine aggregate machine-made sand, rubber particles and a modifier according to the design grading, and dry-mixing for 5-20 s to enable the modifier to be fully melted, dispersed and partially combined with the rubber particles and the aggregates so as to fully exert the modification effect; then adding asphalt and filler mineral powder, uniformly mixing, and preserving heat for more than 1 h. Under the catalysis of high temperature, asphalt, rubber particles and additives fully react, the surface of the rubber particles and the asphalt generate swelling action, active ingredients such as cross-linking agent sulfur, anti-aging agent and other additives in the rubber particles enter the asphalt through interface exchange, so that the asphalt is more viscous, the modifier and the asphalt are fully fused, the binding force of the asphalt and the rubber particles is improved, the asphalt and the rubber particles are tightly combined together in microcosmic, a flexible asphalt concrete layer of the rubber particles with strong elasticity and large damping is formed, the rubber particles and the asphalt bonding layer can be greatly deformed when the structural layer is acted by external force, and the deformed rubber particles and the asphalt bonding material gradually recover to the original position when the external force is removed, so that vibration can be fully absorbed; when the base layer is cracked, the rubber particle flexible asphalt concrete layer can slowly release the stress caused by the base layer crack, so that the reflection crack of the pavement caused by stress concentration is avoided.
The construction of the rubber particle flexible asphalt concrete layer is approximately the same as that of a common asphalt mixture, the common asphalt mixture is firstly paved, then a double-steel-wheel road roller is used for vibration compaction, and the difference is that when the temperature is reduced to below 80 ℃, a large-tonnage tire road roller is used for secondary compaction, so that the compaction defect caused by elasticity of rubber particles is reduced.
The thickness of the rubber granule flexible asphalt concrete layer is set to be 1-4 cm, on one hand, the absorption of the flexible layer to the vibration of the vehicle and the absorption of the tiny strain of the base layer are ensured; on the other hand, the total deformation of the flexible asphalt concrete layer is limited within a certain range, so that fatigue cracking caused by larger strain of the whole pavement is prevented.
The high-modulus asphalt concrete layer is a bearing layer of the composite anti-cracking noise-reduction durable asphalt pavement structure and is used for bearing driving loads. The dynamic modulus at 15 ℃ is higher than 12000MPa, the dynamic modulus at 45 ℃ is higher than 2500MPa, the dynamic stability is higher than 8000 times/mm (60 ℃ and 0.7 MPa), and the technology of low-grade asphalt, high-modulus additives and the like can be adopted. And placing the high-modulus asphalt concrete layer with higher strength modulus on the rubber particle flexible asphalt concrete layer to ensure the main strength of the pavement.
And the construction of the high-modulus asphalt concrete layer is carried out after the rubber granule flexible asphalt concrete layer is completely cooled. The construction of the high-modulus asphalt concrete material is carried out according to normal requirements.
The small-particle-size wearing layer is preferably made of high-strength wear-resistant stone, and the crushing value is lower than 20%; the asphalt cement adopts modified asphalt, the softening point is higher than 65 ℃, and the ductility (5 ℃) is higher than 30cm, so that the sufficient cohesive force and the fatigue cracking resistance are ensured.
The beneficial effects of the invention are as follows: the invention provides a formula design of a composite anti-cracking noise-reducing durable asphalt pavement structure, wherein large-particle rubber with the particle size of 3-8 mm is added into a rubber particle flexible asphalt concrete layer, and can be filled into skeleton gaps of coarse aggregates; the high-modulus asphalt concrete layer has high strength, strong load bearing capacity and high durability; the small-grain-size wearing layer has abrasion resistance, the advantages of each structural layer can be fully and comprehensively exerted, and the pavement structure has the advantages of crack resistance, noise reduction, durability and the like.
The invention will be further described with reference to the drawings and examples.
Drawings
FIG. 1 is a schematic structural view of a composite crack-resistant noise-reducing durable asphalt pavement structure of the present invention.
Fig. 2 is a schematic structural view of a rubber granule flexible asphalt concrete layer in the present invention.
Detailed Description
Embodiment 1, this embodiment provides a compound crack-resistant noise-reducing durable asphalt pavement structure and implementation method, and the specific implementation steps are as follows:
S1: the adhesive layer is applied to the base layer 1. The base layer 1 is 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 broken stone with the grain diameter of 5-10 mm is 6-8 kg/m 2, and the coverage rate is 60-70%;
S2: and after the construction of the bonding layer 2 is completed, the construction of the rubber granule flexible asphalt concrete layer 3 is carried out after the next construction condition is provided. The rubber granule flexible asphalt concrete material selects basalt with the grain diameter of 5-10 mm as coarse aggregate and machine-made sand with the grain diameter of 0-3 mm as fine aggregate; limestone mineral powder is used as a filler; waste tire rubber particles with the particle size of 5-8 mm, wherein ZTA-VE is used as a mixture modifier; the 70A road petroleum asphalt is used as asphalt cement. Basalt: machine-made sand: mineral powder: rubber particles: ZTA-VE: the weight ratio of the asphalt is 70:15:5:10:0.4:6.
The mixing process is as follows: basalt and machine-made sand are heated to 180 ℃ and 70A asphalt is heated to 150 ℃; basalt, machine-made sand, ZTA-VE and rubber particles are added into a stirring pot, dry stirring is carried out for 5-30 s, asphalt and mineral powder are added, stirring is carried out for 30-60 s, and heat preservation is carried out for more than 1h after discharging.
And (3) paving the rubber granule flexible asphalt concrete material by adopting a common paver, wherein the thickness is 3cm, and the paving construction is the same as that of the common asphalt mixture. The method comprises the steps of rolling by adopting a double-steel-wheel road roller, wherein the rolling process is static pressure firstly, vibration compaction secondly, and static pressure again when the temperature is reduced to 60-80 ℃, so as to obtain the rubber particle flexible asphalt concrete layer, and the rubber particle flexible asphalt concrete layer is shown in fig. 2, wherein 31 is coarse aggregate, 32 is fine aggregate, 33 is rubber particle, and 34 is a mixture of modifier and asphalt cement.
S3: and after the rubber granule flexible asphalt concrete layer 3 is paved for 24 hours, the construction of the high modulus asphalt concrete layer 4 is carried out. The high modulus asphalt concrete material is AC-20 graded, each grade of aggregate adopts limestone meeting the standard requirement, and the high modulus additive is added to enable the index to meet the requirements of 15 ℃ dynamic modulus of >12000MPa,45 ℃ dynamic modulus of >2500MPa and dynamic stability of >8000 times/mm (60 ℃ and 0.7 MPa). The construction is carried out according to the technical requirement of high modulus asphalt concrete, the construction thickness is 6cm, and a high modulus asphalt concrete layer 4 is obtained;
S4: and when the temperature of the high-modulus asphalt concrete layer 4 is reduced to below 50 ℃, carrying out construction of the small-particle-size wearing layer 5. Basalt with the grain diameter of 5-10 mm is adopted in the small grain diameter wearing layer 5 so as to ensure the wear resistance of the pavement; and the high-viscosity modified asphalt is adopted, the construction process is carried out according to relevant industry standards, the construction thickness is 3cm, and the small-particle-size wearing layer 5 is obtained.
Embodiment 2, this embodiment provides a composite anti-crack noise-reducing durable asphalt pavement structure and implementation method, and the specific implementation steps are as follows:
S1: the adhesive layer 2 is applied to the base layer 1. The base layer 1 is cement concrete, the base layer 1 is 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 broken stone with the grain diameter of 5-10 mm is 6-8 kg/m 2, and the coverage rate is 60-70%;
S2: and after the construction of the bonding layer 2 is completed, the construction of the rubber granule flexible asphalt concrete layer 3 is carried out after the next construction condition is provided. The flexible asphalt concrete material with rubber particles adopts basalt with the particle size of 5-10 mm as coarse aggregate 31 and machine-made sand with the particle size of 0-3 mm as fine aggregate 32; limestone mineral powder is used as a filler; waste tire rubber particles with the particle size of 3-6 mm, wherein ZTA-VE is used as a mixture modifier; the 70A road petroleum asphalt is used as asphalt cement. Basalt: machine-made 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 is as follows: basalt and machine-made sand are heated to 180 ℃ and 70A asphalt is heated 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 preserving heat for more than 1 h.
And (3) paving the rubber granule flexible asphalt concrete material by adopting a common paver, wherein the thickness is 2cm, and the paving construction is the same as that of the common asphalt mixture. Rolling by adopting a double-steel-wheel road roller, wherein the rolling process is static pressure firstly, vibration compaction secondly, and static pressure again when the temperature is reduced to 60-80 ℃;
S3: and after the rubber granule flexible asphalt concrete layer 3 is paved for 24 hours, the construction of the high modulus asphalt concrete layer 4 is carried out. The high modulus asphalt concrete material is AC-16 graded, each grade of aggregate adopts limestone meeting the standard requirement, and the high modulus additive is added to enable the index to meet the requirements of 15 ℃ dynamic modulus of >12000MPa,45 ℃ dynamic modulus of >2500MPa and dynamic stability of >8000 times/mm (60 ℃ and 0.7 MPa). The construction is carried out according to the technical requirement of high modulus asphalt concrete, the construction thickness is 8cm, and a high modulus asphalt concrete layer 4 is obtained;
S4: and when the temperature of the high-modulus asphalt concrete layer 4 is reduced to below 50 ℃, carrying out construction of the small-particle-size wearing layer 5. Basalt with the grain diameter of 5-10 mm is adopted in the small grain diameter wearing layer 5 so as to ensure the wear resistance of the pavement; and the high-viscosity modified asphalt is adopted, the construction process is carried out according to relevant industry standards, the construction thickness is 2cm, and the small-particle-size wearing layer 5 is obtained.
Embodiment 3, this embodiment provides a composite anti-crack noise-reducing durable asphalt pavement structure and implementation method, and the specific implementation steps are as follows:
S1: the adhesive layer 2 is applied to the base layer 1. The base layer 1 is cement stabilized macadam, the bonding layer 2 is an SBS modified asphalt waterproof bonding layer, the spreading amount of SBS modified asphalt is 1.6-1.8kg/m 2, the spreading amount of macadam with the particle size of 5-10 mm is 6-8 kg/m 2, and the coverage rate is 60-70%;
S2: and after the construction of the bonding layer 2 is completed, the construction of the rubber granule flexible asphalt concrete layer 3 is carried out after the next construction condition is provided. The flexible asphalt concrete material with rubber particles adopts basalt with the particle size of 5-10 mm as coarse aggregate 31 and machine-made sand with the particle size of 0-3 mm as fine aggregate 32; limestone mineral powder is used as a filler; waste tire rubber particles with the particle size of 3-6 mm, wherein ZTA-VE is used as a mixture modifier; the 70A road petroleum asphalt is used as asphalt cement. Basalt: machine-made 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 is as follows: basalt and machine-made sand are heated to 180 ℃ and 70A asphalt is heated to 150 ℃; basalt, machine-made sand, ZTA-VE and rubber particles are added into a stirring pot, dry stirring is carried out for 15s, asphalt and mineral powder are added, stirring is carried out for 35s, and heat preservation is carried out for more than 1h after discharging.
And (3) paving the rubber granule flexible asphalt concrete material by adopting a common paver, wherein the thickness is 2cm, and the paving construction is the same as that of the common asphalt mixture. Rolling by adopting a double-steel-wheel road roller, wherein the rolling process is static pressure firstly, vibration compaction secondly, and static pressure again when the temperature is reduced to 60-80 ℃;
S3: and after the rubber granule flexible asphalt concrete layer 3 is paved for 24 hours, the construction of the high modulus asphalt concrete layer 4 is carried out. The high modulus asphalt concrete material is AC-16 graded, each grade of aggregate adopts limestone meeting the standard requirement, and the high modulus additive is added to enable the index to meet the requirements of 15 ℃ dynamic modulus of >12000MPa,45 ℃ dynamic modulus of >2500MPa and dynamic stability of >8000 times/mm (60 ℃ and 0.7 MPa). The construction is carried out according to the technical requirement of high modulus asphalt concrete, the construction thickness is 8cm, and a high modulus asphalt concrete layer 4 is obtained;
S4: and when the temperature of the high-modulus asphalt concrete layer 4 is reduced to below 50 ℃, carrying out construction of the small-particle-size wearing layer 5. Basalt with the grain diameter of 5-10 mm is adopted in the small grain diameter wearing layer 5 so as to ensure the wear resistance of the pavement; and the high-viscosity modified asphalt is adopted, the construction process is carried out according to relevant industry standards, the construction thickness is 2cm, and the small-particle-size wearing layer 5 is obtained.
Embodiment 4, this embodiment provides a composite anti-crack noise-reducing durable asphalt pavement structure and implementation method, and the specific implementation steps are as follows:
s1: the adhesive layer 2 is applied to the base layer 1. The base layer 1 is asphalt concrete AC-25, the bonding layer 2 adopts SBS modified emulsified asphalt (solid content is more than 50%), and the spreading amount is 0.5kg/m 2.
S2: and after the construction of the bonding layer 2 is completed, the construction of the rubber granule flexible asphalt concrete layer 3 is carried out after the next construction condition is provided. The flexible asphalt concrete material with rubber particles adopts basalt with the particle size of 5-10 mm as coarse aggregate 31 and machine-made sand with the particle size of 0-3 mm as fine aggregate 32; limestone mineral powder is used as a filler; waste tire rubber particles with the particle size of 3-8 mm, wherein ZTA-VE is used as a mixture modifier; the 70A road petroleum asphalt is used as asphalt cement. Basalt: machine-made sand: mineral powder: rubber particles: ZTA-VE: the weight ratio of asphalt is 63:5:7:20:1:7.
The mixing process is as follows: basalt and machine-made sand are heated to 180 ℃ and 70A asphalt is heated 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 preserving heat for more than 1 h.
The common paver is adopted to carry out paving construction of the rubber granule flexible asphalt concrete material, the thickness is 1.5cm, and the paving construction is the same as that of the common asphalt mixture. Rolling by adopting a double-steel-wheel road roller, wherein the rolling process is static pressure firstly, vibration compaction secondly, and static pressure again when the temperature is reduced to 60-80 ℃;
S3: and after the rubber granule flexible asphalt concrete layer 3 is paved for 24 hours, the construction of the high modulus asphalt concrete layer 4 is carried out. The high modulus asphalt concrete material is AC-16 graded, each grade of aggregate adopts limestone meeting the standard requirement, and the high modulus additive is added to enable the index to meet the requirements of 15 ℃ dynamic modulus of >12000MPa,45 ℃ dynamic modulus of >2500MPa and dynamic stability of >8000 times/mm (60 ℃ and 0.7 MPa). The construction is carried out according to the technical requirement of high modulus asphalt concrete, the construction thickness is 4cm, and a high modulus asphalt concrete layer 4 is obtained;
S4: and when the temperature of the high-modulus asphalt concrete layer 4 is reduced to below 50 ℃, carrying out construction of the small-particle-size wearing layer 5. Basalt with the grain diameter of 5-10 mm is adopted in the small grain diameter wearing layer 5 so as to ensure the wear resistance of the pavement; and the high-viscosity modified asphalt is adopted, the construction process is carried out according to relevant industry standards, the construction thickness is 2cm, and the small-particle-size wearing layer 5 is obtained.
Comparative example 1: the cement concrete base layer was the same as in examples 1 and 2, the adhesive layer was a rubber asphalt waterproof adhesive layer, and the surface layer was a modified asphalt SMA-13+8cm AC-25 having a thickness of 4cm, as in example 1.
Comparative example 2: the cement stabilized macadam base layer was the same as in example 3, the bonding layer was SBS modified asphalt, and the surface layer was modified asphalt SMA-13+8cm AC-25 having a thickness of 4cm, as in example 3.
Comparative example 3: the same asphalt stabilized macadam base as in example 4, the bonding layer was SBR modified emulsified asphalt, and the surface layer was modified asphalt SMA-13+5cmAC-16 with a thickness of 3cm as in example 4.
Table 3 pavement conditions of different pavement structures
Road surface PCI, road side driving noise (80 km) and the number of cracks were performed for each road section during driving, 2 years of driving and 4 years of driving, and the results are shown in Table 3. As can be seen from the data in Table 3, the pavement structure provided by the present invention has the characteristics of crack resistance, noise reduction and durability as compared with the conventional pavement structure.
Variations and modifications to the above would be obvious to persons skilled in the art to which the invention pertains from the foregoing description and teachings. Therefore, the invention is not limited to the specific embodiments disclosed and described above, but some modifications and changes of the invention should be also included in the scope of the claims of the invention. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not limit the present invention in any way. As described in the above embodiments of the present invention, other road surfaces and methods for implementing the same or similar methods and components are within the scope of the present invention.
Claims (10)
1. The utility model provides a durable bituminous pavement structure of making an uproar falls in compound type anticracking, its includes basic unit, and characterized in that, it still includes tie coat, rubber granule flexible asphalt concrete layer, high modulus asphalt concrete layer and small particle diameter wearing layer, tie coat, rubber granule flexible asphalt concrete layer, high modulus asphalt concrete layer and small particle diameter wearing layer cover in proper order from down on the basic unit, the particle diameter of rubber granule in the rubber granule flexible asphalt concrete layer is 3 ~ 8mm.
2. The composite crack-resistant noise-reducing durable asphalt pavement structure according to claim 1, wherein the rubber particle flexible asphalt concrete layer has a thickness of 1-4 cm.
3. The composite crack-resistant noise-reducing durable asphalt pavement structure of claim 1, wherein the high modulus asphalt concrete layer has a thickness of 4-10 cm.
4. The composite crack-resistant noise-reducing durable asphalt pavement structure of claim 1, wherein the small particle size wearing layer has a thickness of 1.5-5 cm.
5. The composite crack-resistant noise-reducing durable asphalt pavement structure of claim 1, wherein the small particle size wearing layer is a wear-resistant stone layer.
6. The composite crack-resistant noise-reducing durable asphalt pavement structure of any of claims 1-5, wherein the base layer is one of a cement concrete layer, a cement stabilized gravel layer, or an asphalt concrete layer.
7. The composite anti-crack noise-reducing durable asphalt pavement structure according to claim 5, wherein the bonding layer is a rubber asphalt layer, a modified asphalt waterproof bonding layer or a modified emulsified asphalt layer.
8. The implementation method of the composite anti-cracking noise-reduction durable asphalt pavement structure is characterized by comprising the following steps of:
s1: carrying out binder construction on the base layer to form a binding layer;
S2: carrying out construction of rubber particle flexible asphalt concrete materials on the bonding layer, and carrying out static pressure when the pavement is cooled to below 80 ℃ after paving is smooth to form a rubber particle flexible asphalt concrete layer;
S3: carrying out high-modulus asphalt concrete material construction on the rubber particle flexible asphalt concrete layer to form a high-modulus asphalt concrete layer;
S4: and carrying out construction of a small-grain-size wearing layer on the high-modulus asphalt concrete layer to obtain the composite anti-cracking noise-reduction durable asphalt pavement structure.
9. The method according to claim 8, wherein the rubber granule flexible asphalt concrete layer is cooled for 24 hours or more in step S2 before the construction of step S3.
10. The method according to claim 8, wherein the high modulus asphalt concrete layer is cooled to 50 ℃ or less in step S3 before the step S4 construction is performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211369693.2A CN117988182A (en) | 2022-11-03 | 2022-11-03 | Composite anti-cracking noise-reducing durable asphalt pavement structure and implementation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211369693.2A CN117988182A (en) | 2022-11-03 | 2022-11-03 | Composite anti-cracking noise-reducing durable asphalt pavement structure and implementation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117988182A true CN117988182A (en) | 2024-05-07 |
Family
ID=90900288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211369693.2A Pending CN117988182A (en) | 2022-11-03 | 2022-11-03 | Composite anti-cracking noise-reducing durable asphalt pavement structure and implementation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117988182A (en) |
-
2022
- 2022-11-03 CN CN202211369693.2A patent/CN117988182A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101239796A (en) | High-performance low-noise asphalt pavement conserving material and preparation method thereof | |
| CN102849987B (en) | Low-emission composite phase-change modified asphalt mixture and preparation method thereof | |
| CN107651887B (en) | High-modulus rubber asphalt mixture and preparation method thereof | |
| CN110593046A (en) | High-strength durable steel slag permeable asphalt pavement structure | |
| CN108947328B (en) | Steel slag permeable asphalt mixture based on waste rubber powder modified high-viscosity asphalt | |
| CN111622043A (en) | Drainage noise reduction type asphalt pavement paving structure | |
| CN113863082B (en) | BRT station heavy-load traffic road section paving structure and construction method | |
| CN110128070B (en) | Graded broken stone pouring type semi-flexible composite pavement mixture and pavement construction method | |
| CN109021595A (en) | A kind of hot recycling steel slag asphalt mixture | |
| CN115450086B (en) | Old cement concrete pavement reconstruction structure suitable for non-extra-heavy traffic grade and design method | |
| CN111320419A (en) | Ultrathin rubber asphalt wearing layer for pavement | |
| CN111304994A (en) | Semi-flexible functional composite structure recovery layer applied to asphalt pavement maintenance | |
| CN114855607B (en) | Cement concrete bridge deck asphalt pavement structure and pavement construction method | |
| CN117988182A (en) | Composite anti-cracking noise-reducing durable asphalt pavement structure and implementation method thereof | |
| CN217378443U (en) | Ultra-thin bituminous pavement of high-grade highway | |
| CN218596797U (en) | Composite anti-cracking noise-reducing durable asphalt pavement structure | |
| CN114775359A (en) | Pavement sealing structure and construction method thereof | |
| CN112759327B (en) | Micro-surfacing pavement material and preparation method thereof | |
| CN115045154A (en) | Cold-mixed cold-paved ultrathin asphalt wearing layer and preparation method thereof | |
| CN111138122B (en) | Framework compact type rubber asphalt ultrathin wearing layer and preparation method thereof | |
| CN113957761A (en) | Ultra-thin bituminous pavement of high-grade highway | |
| CN112300587A (en) | Composite rubber asphalt, mixture thereof and high-crack-resistant and anti-rutting three-layer rubber asphalt pavement structure containing mixture | |
| CN218373100U (en) | Additional paving structure of heavy-load traffic cement concrete pavement | |
| CN112250347A (en) | Asphalt concrete suitable for low-heat valley areas and preparation method thereof | |
| CN111501467A (en) | Method for improving initial anti-sliding performance of asphalt mastic macadam wearing layer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |