CN210507024U - Anti-cracking base cloth for asphalt pavement - Google Patents
Anti-cracking base cloth for asphalt pavement Download PDFInfo
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- CN210507024U CN210507024U CN201920951205.6U CN201920951205U CN210507024U CN 210507024 U CN210507024 U CN 210507024U CN 201920951205 U CN201920951205 U CN 201920951205U CN 210507024 U CN210507024 U CN 210507024U
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Abstract
The application discloses crack control base cloth for bituminous paving includes: the anti-cracking fabric comprises at least one layer of polypropylene base cloth and at least one layer of polypropylene flexible reinforcing layer, wherein the polypropylene flexible reinforcing layer is a surface layer or an inner layer of the anti-cracking base cloth, and the polypropylene base cloth and the polypropylene flexible reinforcing layer are connected in a sewing or needling composite mode. The thickness of the anti-cracking base cloth is 1.4-1.9 mm. The thickness of the polypropylene flexible reinforcing layer is 0.4-0.6 mm. The thickness of the polypropylene base cloth is 1.0-1.4 mm. The application provides an anti-cracking base cloth thickness is little, and the modulus is high, and tensile strength is high, uses under being particularly useful for the big adverse circumstances of high difference in temperature of altitude.
Description
Technical Field
The application relates to the technical field of pavement crack control, in particular to crack control base cloth for an asphalt pavement.
Background
As the sea level is high and the temperature difference is large in the Tibet and Xinjiang areas of China, road surfaces are constantly influenced by freeze-thaw cycles and the subgrade is not uniformly settled, asphalt road surfaces are easy to crack, water infiltration is formed, and further damage and serious damage of the road surfaces are caused, so that the anti-cracking base cloth is added into the reconstructed road and the newly-built road, the generation of semi-rigid base layer reflection cracks can be effectively reduced and delayed, and the water infiltration is prevented.
Traditional anti-cracking base cloth wholeness can be relatively poor, because thickness is thicker, in the work progress, hardly with pitch surface course closely bond, form the cavity easily, influence the effect of in-service use. In addition, in the areas with severe weather environments, the anti-cracking base cloth needs to provide larger tension in the process of resisting the formation of the reflection cracks of the road surface and the cracking of the road surface, so that the anti-cracking base cloth with better performance and higher strength needs to be provided under the condition of not increasing the construction difficulty and the implementation difficulty.
SUMMERY OF THE UTILITY MODEL
Therefore, the anti-cracking base cloth with better performance and higher strength is needed to solve the problem of pavement cracking in severe environment.
An anti-cracking base fabric for asphalt pavement, comprising: the anti-cracking fabric comprises at least one layer of polypropylene base cloth and at least one layer of polypropylene flexible reinforcing layer, wherein the polypropylene flexible reinforcing layer is a surface layer or an inner layer of the anti-cracking base cloth, and the polypropylene base cloth and the polypropylene flexible reinforcing layer are connected in a sewing or needling composite mode.
The application provides an anti-cracking base cloth is applicable to the asphalt surface course of rebuilding and expansion and newly-built road, the anti-cracking base cloth has flexible enhancement layer, can increase the tensile strength of polypropylene base cloth by a wide margin, effectively prevents the production of reflection crack and temperature contraction crack in the asphalt surface course, extension road life.
Several alternatives are provided below, but not as an additional limitation to the above general solution, but merely as a further addition or preference, each alternative being combinable individually for the above general solution or among several alternatives without technical or logical contradictions.
Optionally, the thickness of the anti-cracking base cloth is 1.4-1.9 mm.
Optionally, the thickness of the polypropylene flexible reinforcing layer is 0.4-0.6 mm.
Optionally, the thickness of the polypropylene base cloth is 1.0-1.4 mm.
Optionally, the anti-cracking base cloth is formed by sewing and connecting a layer of polypropylene base cloth and a layer of polypropylene flexible reinforcing layer, and the thickness of the anti-cracking base cloth is 1.7-1.9 mm.
Optionally, the anti-cracking base cloth is formed by needling and compounding a layer of polypropylene base cloth and a layer of polypropylene flexible reinforcing layer, the polypropylene base cloth comprises at least two layers of fibers, the polypropylene flexible reinforcing layer is located between the two layers of fibers, and the thickness of the anti-cracking base cloth is 1.4-1.7 mm.
Optionally, the polypropylene flexible reinforced layer is a polypropylene grid.
Optionally, the grid of the polypropylene grid is square, and the side length of the square is 10-20 mm.
Optionally, the grid bars of the polypropylene grid have a circular cross-section.
Optionally, the diameter of the grid bars is 0.4-0.6 mm.
The application provides an anti-cracking base cloth thickness is little, and the modulus is high, and tensile strength is high, uses under being particularly useful for the big adverse circumstances of high difference in temperature of altitude.
Drawings
FIG. 1 is a schematic view of a polypropylene substrate in an anti-chapping substrate according to the present application;
FIG. 2 is a schematic view of a polypropylene flexible reinforcing layer in the anti-cracking base fabric;
FIG. 3 is a schematic view of one embodiment of an anti-splitting scrim according to the present application;
fig. 4 is a schematic view of one embodiment of the anti-cracking base fabric.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
For a better description and illustration of embodiments of the application, reference may be made to one or more of the drawings, but additional details or examples for describing the drawings should not be construed as limiting the scope of any of the inventive concepts of the present application, the presently described embodiments, or the preferred versions.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
As shown in fig. 3 and 4, an anti-cracking base fabric for asphalt pavement comprises: the anti-cracking fabric comprises at least one layer of polypropylene base cloth 1 and at least one layer of polypropylene flexible reinforcing layer 2, wherein the polypropylene flexible reinforcing layer 2 is a surface layer or an inner layer of the anti-cracking base cloth, and the polypropylene base cloth 1 and the polypropylene flexible reinforcing layer 2 are connected in a sewing or needling composite mode.
The flexible reinforced layer of the anti-cracking base cloth can greatly increase the tensile strength of the polypropylene base cloth 1, is suitable for severe environment and delays the generation of reflection cracks of a rigid pavement.
The thickness of the anti-cracking base cloth is 1.4-1.9 mm. The tensile strength of the anti-cracking base cloth is 12-15 kN. The anti-cracking base cloth is small in thickness and high in modulus, can be completely bonded with the asphalt pavement, and maximally delays the generation of reflection cracks of the rigid pavement.
The thickness of the polypropylene base cloth 1 is 1.0-1.4 mm. The structure of the polypropylene base cloth 1 is shown in fig. 1, and the polypropylene base cloth 1 is made of polypropylene continuous filament geotextile. And (3) uniformly extruding the polypropylene slices, adding 8 +/-1% of lubricant when extruding the polypropylene, and forming uniform and continuous filaments through a spinning assembly to prepare the geotextile.
The polypropylene base cloth 1 is resistant to acid and alkali corrosion and can tolerate the acid and alkali range of pH 2-13. The tensile strength of the polypropylene base cloth 1 is 8-10 kN, and is greater than that of polyester geotextiles with the same mass.
The thickness of the polypropylene flexible reinforced layer 2 is 0.4-0.6 mm. The thickness of the polypropylene flexible reinforced layer 2 is smaller, and the thickness of the polypropylene base cloth 1 cannot be obviously increased, so that the anti-cracking base cloth can keep smaller thickness, and the construction and performance exertion are facilitated.
The tensile strength of the polypropylene flexible reinforcing layer 2 is 3-5 kN, the polypropylene flexible reinforcing layer is resistant to acid and alkali corrosion, the pH value in an acid-base tolerance range is 2-13, freeze-thaw cycle is resistant, and the temperature tolerance range is-60-165 ℃.
The anti-cracking base cloth is formed by connecting the polypropylene base cloth 1 and the polypropylene flexible reinforced layer 2 together in two modes of sewing or needling, the thickness and the strength of the anti-cracking base cloth obtained in different modes are different, and the concrete adopted form can be determined according to actual construction conditions.
In one embodiment, as shown in fig. 3, the anti-cracking base cloth is formed by sewing and connecting a layer of polypropylene base cloth 1 and a layer of polypropylene flexible reinforced layer 2, the thickness of the anti-cracking base cloth is 1.7-1.9 mm, and the tensile strength of the anti-cracking base cloth is 13-15 kN.
As shown in figure 3, the polypropylene base cloth 1 and the polypropylene flexible reinforced layer 2 are superposed, namely the polypropylene flexible reinforced layer 2 is positioned outside the polypropylene base cloth 1 and is formed by sewing and connecting the polypropylene flexible reinforced layer by the sewing threads 3, the trend of the sewing threads 3 comprises a longitudinal direction and a transverse direction which are perpendicular to each other, and the sewing strength is selected according to the requirement.
In another embodiment, as shown in fig. 4, the anti-cracking base cloth is formed by needling and compounding a layer of polypropylene base cloth 1 and a layer of polypropylene flexible reinforced layer 2, the polypropylene base cloth 1 comprises at least two layers of fibers, the polypropylene flexible reinforced layer 2 is positioned between the two layers of fibers, the thickness of the anti-cracking base cloth is 1.4-1.7 mm, and the tensile strength of the anti-cracking base cloth is 12-14 kN.
As shown in fig. 4, the polypropylene base cloth 1 comprises at least two layers of fibers, and the polypropylene flexible reinforced layer 2 is positioned between two layers of fibers, namely the polypropylene flexible reinforced layer 2 is positioned inside the polypropylene base cloth 1. The polypropylene base cloth 1 comprises an even number of layers of fibers, the polypropylene flexible reinforced layer 2 is positioned between the two layers of fibers at the middle, namely the polypropylene flexible reinforced layer 2 is the middle layer of the anti-cracking base cloth on the whole.
The polypropylene flexible reinforced layer 2 is a polypropylene grid. The polypropylene grid has various structural forms, and in one embodiment, as shown in fig. 2, the grid of the polypropylene grid is square, and the side length of the square is 10-20 mm. The size of the polypropylene grid is adjusted according to specific use conditions.
The polypropylene grating is connected with the grating strips 2a in the longitudinal direction and the transverse direction, longitudinal and transverse stress constraints are provided for the polypropylene base cloth 1, and the polypropylene grating and the polypropylene base cloth 1 are made of the same material, so that the deformation coordination can be ensured, and the integral stress requirement can be met.
The cross-sectional shape of the grid bars 2a of the polypropylene grid is not limited, and in one embodiment, the grid bars 2a of the polypropylene grid have a circular cross-section. The grid 2a of circular cross-section has rounded edges to prevent damage to the polypropylene base cloth 1.
The thickness of the polypropylene grating is determined by the diameter of the grid bars 2a of the polypropylene grating, and the diameter of the grid bars 2a is 0.4-0.6 mm.
Using scenario one: in the reconstructed or newly-built road, the asphalt surface layer is more than or equal to 10cm, the anti-cracking base cloth adopts a sewing connection mode, the thickness is about 1.7-1.9 mm, and the tensile strength is 13-15 kN.
Using scenario two: in the reconstructed or newly-built road, the asphalt surface layer is less than 10cm, the anti-cracking base cloth adopts a needling composite connection mode, the thickness is about 1.4-1.7 mm, and the tensile strength is 12-14 kN.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An anti-cracking base fabric for an asphalt pavement, comprising: the anti-cracking fabric comprises at least one layer of polypropylene base cloth and at least one layer of polypropylene flexible reinforcing layer, wherein the polypropylene flexible reinforcing layer is a surface layer or an inner layer of the anti-cracking base cloth, and the polypropylene base cloth and the polypropylene flexible reinforcing layer are connected in a sewing or needling composite mode.
2. An anti-cracking base cloth for an asphalt pavement as claimed in claim 1, wherein the thickness of the anti-cracking base cloth is 1.4-1.9 mm.
3. An anti-cracking base fabric for an asphalt pavement as claimed in claim 1, wherein the thickness of the polypropylene flexible reinforcing layer is 0.4-0.6 mm.
4. An anti-cracking base cloth for an asphalt pavement as claimed in claim 1, wherein the polypropylene base cloth has a thickness of 1.0-1.4 mm.
5. An anti-cracking base cloth for an asphalt pavement as claimed in claim 1, wherein the anti-cracking base cloth is formed by sewing and connecting a layer of polypropylene base cloth and a layer of polypropylene flexible reinforcing layer, and the thickness of the anti-cracking base cloth is 1.7-1.9 mm.
6. An anti-cracking base cloth for an asphalt pavement as claimed in claim 1, wherein the anti-cracking base cloth is formed by a layer of polypropylene base cloth and a layer of polypropylene flexible reinforcing layer through needling composite connection, the polypropylene base cloth comprises at least two layers of fibers, the polypropylene flexible reinforcing layer is located between the two layers of fibers, and the thickness of the anti-cracking base cloth is 1.4-1.7 mm.
7. An anti-cracking base cloth for an asphalt pavement as claimed in any one of claims 1 to 6, wherein the polypropylene flexible reinforcing layer is a polypropylene grid.
8. An anti-cracking base cloth for an asphalt pavement as claimed in claim 7, wherein the grid of the polypropylene grid is square, and the side length of the square is 10-20 mm.
9. An anti-cracking base fabric for asphalt pavement according to claim 7, wherein the grid bars of the polypropylene grid have a circular cross section.
10. An anti-cracking base fabric for an asphalt pavement as claimed in claim 9, wherein the diameter of the grid bars is 0.4-0.6 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920951205.6U CN210507024U (en) | 2019-06-21 | 2019-06-21 | Anti-cracking base cloth for asphalt pavement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920951205.6U CN210507024U (en) | 2019-06-21 | 2019-06-21 | Anti-cracking base cloth for asphalt pavement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210507024U true CN210507024U (en) | 2020-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920951205.6U Active CN210507024U (en) | 2019-06-21 | 2019-06-21 | Anti-cracking base cloth for asphalt pavement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210507024U (en) |
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2019
- 2019-06-21 CN CN201920951205.6U patent/CN210507024U/en active Active
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Effective date of registration: 20201105 Address after: 271000 east of Quxi road and south of yitianmen street, high tech Zone, Tai'an City, Shandong Province Patentee after: SHANDONG ROAD ENGINEERING MATERIALS Co.,Ltd. Address before: Room 601, unit 3, No. 358, Jingyi Road East Lane, shayiba District, Urumqi City, Xinjiang Uygur Autonomous Region Patentee before: Xinjiang bangteer Information Technology Co.,Ltd. |