CN213804694U - Anti-reflection crack bituminous pavement structure - Google Patents
Anti-reflection crack bituminous pavement structure Download PDFInfo
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- CN213804694U CN213804694U CN202021858284.5U CN202021858284U CN213804694U CN 213804694 U CN213804694 U CN 213804694U CN 202021858284 U CN202021858284 U CN 202021858284U CN 213804694 U CN213804694 U CN 213804694U
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Abstract
The utility model discloses an anti-reflection crack bituminous paving structure down includes from last in proper order: the waterproof roll material comprises a modified asphalt surface layer, a lower seal layer, a water-stable macadam base layer, a subbase layer, a waterproof roll material layer and a macadam cushion layer; the modified asphalt surface layer consists of an upper modified asphalt layer and a lower modified asphalt layer, the upper modified asphalt layer is basalt fiber reinforced fine particle type modified asphalt concrete, the thickness of the upper modified asphalt layer is 3-6 cm, and the length of basalt fiber is 6-15 mm; the lower layer is basalt fiber reinforced coarse grain type modified asphalt concrete, the thickness is 5-10 cm, and the length of basalt fiber is 15-30 mm. The utility model provides an anti-reflection crack bituminous paving structure, cohesiveness all has better effect between intensity and each layer, and delay that can be better alleviates and reduces the cracked appearance of road surface reflection, and road structure long service life and performance are good.
Description
Technical Field
The utility model relates to a bituminous paving structure especially relates to an anti-reflection crack bituminous paving structure.
Background
The crack of the asphalt pavement is caused by various reasons, and the main reasons for generating the pavement crack are that the material is shrunk due to the change of the humidity and the temperature, and the whole strength of the pavement is insufficient due to the damage of a base layer caused by the load, so that the generation of the reflection crack of the pavement is caused. The main factors influencing the degree of crack weight are as follows: the properties of the asphalt and asphalt mixture, the properties of the base material, the weather conditions, the traffic volume, the type of vehicle, the construction factors, and the like.
Most of asphalt pavements at present adopt the structure of asphalt pavement + semi-rigid base course, and the semi-rigid base course does not have the not enough production that leads to the load crack of confined strength of base course because of the load repetitive action of driving a vehicle, and in addition, water damage, drying shrinkage and temperature shrink also can lead to the damage of semi-rigid base course. Reflection cracks are a common disease of current asphalt pavements, and are mainly caused by cracks of a road base layer.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a reflection crack bituminous paving structure is provided, cohesiveness all has better effect between intensity and each layer, can be better delay and reduce the cracked appearance of road surface reflection, road structure long service life and performance are good.
The utility model discloses a solve above-mentioned technical problem and the technical scheme who adopts provides an anti-reflection crack bituminous paving structure, down includes from the last in proper order: modified asphalt surface course, lower seal coat, water-stable macadam base course, subbase course, waterproof coil material layer and macadam cushion course.
The anti-reflection crack asphalt pavement structure is characterized in that the modified asphalt surface layer consists of an upper modified asphalt layer and a lower modified asphalt layer, the upper modified asphalt layer is basalt fiber reinforced fine particle type modified asphalt concrete, the thickness of the upper modified asphalt layer is 3-6 cm, and the length of basalt fiber is 6-15 mm; the lower layer is basalt fiber reinforced coarse grain type modified asphalt concrete, the thickness is 5-10 cm, and the length of basalt fiber is 15-30 mm.
In the anti-reflection crack asphalt pavement structure, the aggregate nominal maximum particle size of the basalt fiber reinforced fine particle type modified asphalt concrete is 13.2mm, and the maximum particle size is 16 mm.
In the above asphalt pavement structure with the reflection cracks, the aggregate of the basalt fiber reinforced coarse-grained modified asphalt concrete has a nominal maximum grain size of 26.5mm and a maximum grain size of 31.5 mm.
The anti-reflection crack asphalt pavement structure is characterized in that the lower seal layer is a semi-flexible asphalt modified geopolymer lower seal layer, and the thickness of the lower seal layer is 0.5-1 cm.
The anti-reflection crack asphalt pavement structure is characterized in that the thickness of the water-stable macadam base layer is 15-30 cm.
The anti-reflection crack asphalt pavement structure is characterized in that the subbase layer is one of gravel, gravel and stabilized soil, and the thickness of the subbase layer is 30-50 cm.
The anti-reflection crack asphalt pavement structure is characterized in that the thickness of the waterproof coiled material layer is 1 cm.
In the anti-reflection crack asphalt pavement structure, the thickness of the gravel cushion is 7-15 cm.
The utility model discloses contrast prior art has following beneficial effect: the utility model provides an anti-reflection crack bituminous paving structure, cohesiveness all has better effect between intensity and each layer, and delay that can be better alleviates and reduces the cracked appearance of road surface reflection, and road structure long service life and performance are good.
Drawings
Figure 1 is the utility model discloses anti-reflection crack bituminous paving structure sketch map.
In the figure:
the concrete comprises, by weight, 1-a basalt reinforced modified fine particle type asphalt concrete layer, 2-a basalt reinforced modified coarse particle type asphalt concrete layer, 3-a semi-flexible asphalt modified geopolymer lower sealing layer, 4-a water-stable macadam base layer, 5-an underlayer, 6-a waterproof coil material layer, 7-a macadam cushion layer and 8-a roadbed.
Detailed Description
The invention is further described with reference to the following figures and examples.
Figure 1 is the utility model discloses anti-reflection crack bituminous paving structure sketch map.
Referring to fig. 1, the anti-reflection crack bituminous pavement structure provided by the present invention sequentially includes, from top to bottom: the basalt reinforced modified asphalt pavement, the lower sealing layer, the water-stable macadam base layer 4, the subbase layer 5, the waterproof coil material layer 6 and the macadam cushion layer 7, wherein a roadbed 8 is arranged below the macadam cushion layer 7.
In the structure, the modified asphalt surface layer consists of an upper layer and a lower layer of modified asphalt layers, the upper layer is a basalt fiber reinforced fine particle type modified asphalt concrete layer 1, the thickness is 3-6 cm, the nominal maximum particle size of aggregate is 13.2mm, the maximum particle size is 16mm, the length of basalt fiber is 6-15 mm, and the weight ratio is 0.5% -2%; the lower layer is a basalt fiber reinforced coarse grain type modified asphalt concrete layer 2, the thickness is 5-10 cm, the nominal maximum grain size of aggregate is 26.5mm, the maximum grain size is 31.5mm, the length of basalt fiber is 15-30 mm, and the weight ratio is 1% -3%.
In the structure, the lower seal layer is a semi-flexible asphalt modified geopolymer lower seal layer 3 which is used as a transition layer to protect the base layer and bond the base layer and the surface layer, and the thickness of the lower seal layer is 0.5-1 cm.
In the structure, the thickness of the water-stable macadam foundation 4 is 15-30 cm; the subbase layer 5 is one of crushed stone, gravel and stabilized soil, and the thickness is 30-50 cm; the thickness of the waterproof roll material layer 6 is 1 cm; the thickness of the gravel cushion layer 7 is 7-15 cm.
The utility model provides an anti-reflection crack bituminous paving structure has following advantage:
1. the utility model discloses a modified asphalt surface course of basalt reinforcing of bilayer structure is adopted to the pitch surface course, and basalt fiber reinforcing modified asphalt can improve the heat resistance of pitch surface course on the one hand, on the other hand can improve the anti-crack, the shearing resistance ability of pitch surface course more, delays and reduces the production of road surface crack; the semi-flexible asphalt modified geopolymer lower sealing layer 3 can prevent seeper from permeating, has good mechanical property and adhesive property of geopolymer materials and excellent toughness of asphalt materials, and can be used as a transition adhesive layer to ensure that a base layer and a surface layer have good adhesive effect, absorb stress generated by pavement load and temperature shrinkage and delay the generation of reflection cracks of asphalt pavements. The waterproof coiled material layer 6 is arranged between the subbase layer 5 and the gravel cushion layer 7, so that accumulated water can be prevented from permeating the roadbed 8, and the damage to the base layer and the reflection crack disease of the pavement, which are caused by uneven settlement of the roadbed, are avoided.
2. The utility model discloses anti reflection crack bituminous paving structure, it is rational in infrastructure, cohesiveness all has better effect between intensity and each layer, delay that can be better and reduce the cracked appearance of road surface reflection, road structure long service life and performance are good.
Although the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. The utility model provides an anti-reflection crack bituminous pavement structure which characterized in that from last down includes in proper order: the waterproof roll material comprises a modified asphalt surface layer, a lower seal layer, a water-stable macadam base layer, a subbase layer, a waterproof roll material layer and a macadam cushion layer; the modified asphalt surface layer consists of an upper modified asphalt layer and a lower modified asphalt layer, the upper layer is basalt fiber reinforced fine particle type modified asphalt concrete, and the lower layer is basalt fiber reinforced coarse particle type modified asphalt concrete.
2. The reflection crack resistant asphalt pavement structure as claimed in claim 1, wherein the thickness of the upper layer basalt fiber reinforced fine particle type modified asphalt concrete is 3 to 6cm, and the length of the basalt fiber is 6 to 15 mm; the thickness of the lower layer basalt fiber reinforced coarse grain type modified asphalt concrete is 5-10 cm, and the length of basalt fiber is 15-30 mm.
3. The reflection crack resistant asphalt pavement structure according to claim 2, wherein the aggregate of the basalt fiber-reinforced fine particle-type modified asphalt concrete has a nominal maximum particle diameter of 13.2mm and a maximum particle diameter of 16 mm.
4. The reflection crack resistant asphalt pavement structure according to claim 2, wherein the aggregate of the basalt fiber-reinforced coarse grain modified asphalt concrete has a nominal maximum particle size of 26.5mm and a maximum particle size of 31.5 mm.
5. The asphalt pavement structure with the reflection cracks as claimed in claim 1, wherein the lower sealing layer is a semi-flexible asphalt modified geopolymer lower sealing layer, and the thickness of the lower sealing layer is 0.5-1 cm.
6. The reflection crack resistant asphalt pavement structure as claimed in claim 1, wherein the thickness of said water-stable macadam base course is 15-30 cm.
7. The reflection crack resistant asphalt pavement structure according to claim 1, wherein the sub-base layer is one of crushed stone, gravel and stabilized soil, and has a thickness of 30 to 50 cm.
8. The reflection crack resistant asphalt pavement structure according to claim 1, wherein the waterproof roll layer is 1cm thick.
9. The asphalt pavement structure with the reflection cracks as claimed in claim 1, wherein the thickness of the gravel cushion is 7-15 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021858284.5U CN213804694U (en) | 2020-08-31 | 2020-08-31 | Anti-reflection crack bituminous pavement structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021858284.5U CN213804694U (en) | 2020-08-31 | 2020-08-31 | Anti-reflection crack bituminous pavement structure |
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| Publication Number | Publication Date |
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| CN213804694U true CN213804694U (en) | 2021-07-27 |
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| CN202021858284.5U Active CN213804694U (en) | 2020-08-31 | 2020-08-31 | Anti-reflection crack bituminous pavement structure |
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| CN (1) | CN213804694U (en) |
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- 2020-08-31 CN CN202021858284.5U patent/CN213804694U/en active Active
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