CN210657855U - Filling type large-particle-size cement stabilized base asphalt pavement structure - Google Patents
Filling type large-particle-size cement stabilized base asphalt pavement structure Download PDFInfo
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- CN210657855U CN210657855U CN201921471204.8U CN201921471204U CN210657855U CN 210657855 U CN210657855 U CN 210657855U CN 201921471204 U CN201921471204 U CN 201921471204U CN 210657855 U CN210657855 U CN 210657855U
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Abstract
The utility model relates to a transportation road technical field, concretely relates to basic unit bituminous pavement structure is stabilized to big particle size cement of filled type. The cement stabilized macadam is a novel base layer structure between semi-rigid and flexible, not only respectively retains the outstanding advantages of a cement stabilized macadam semi-rigid base layer and a flexible base layer, but also overcomes the defects of the cement stabilized macadam semi-rigid base layer and the flexible base layer. The technical proposal of the utility model comprises a cement stabilized macadam base layer, a filling type large-particle size cement stabilized macadam base layer, a seal coat and an asphalt surface coat; the asphalt surface layer, the sealing layer, the filling type large-particle-size cement stabilized macadam base layer and the cement stabilized macadam base layer are sequentially arranged from top to bottom to form a pavement structure; the cement stabilized macadam base layer is a substance obtained by milling and planing an old asphalt pavement surface layer in a full-depth mode or a substance obtained by additionally paving a cement stabilized macadam base layer on an old road; the filling type large-particle-size cement stabilized macadam base layer is a framework formed by large-particle-size main aggregate, and gaps are filled with cement stabilized macadam filling materials; the seal layer is 1cm rubber asphalt macadam.
Description
Technical Field
The utility model relates to a transportation road technical field, concretely relates to basic unit bituminous pavement structure is stabilized to big particle size cement of filled type.
Background
In various grades of roads in China, the common pavement type is a combined structure of a semi-rigid base course and an asphalt surface course, cement stabilized macadam is used as a main bearing layer of the pavement, and the pavement has the advantages of good integrity, high strength, high rigidity, good water stability, low manufacturing cost and the like, but the traditional semi-rigid base course also has the following defects:
when the temperature or the humidity changes, the cement stabilized macadam base layer is easy to generate temperature shrinkage cracks and drying shrinkage cracks. The existence of the crack not only reduces the integrity and the strength of the cement stabilized macadam base layer, but also transmits and reflects upwards to form a penetrating crack from bottom to top, once rainwater seeps into the pavement, the rainwater is not easy to discharge, is retained on the top surface of the base layer for a long time, soaks the base layer to form mortar, and is sprayed out from gaps or gaps of the surface layer under the extrusion and pumping action of a driving load to form a pumping damage. If the treatment is not timely carried out, the net is cracked, loosened and pits can develop, and finally large-area damage is caused.
Besides the cement stabilized macadam semi-rigid base layer, flexible base layers such as asphalt stabilized macadam and graded macadam are adopted in a few road surfaces in China, the rigidity is relatively small, shrinkage cracking is not easy to generate, reflection cracks are not easy to generate on the surface layer, and the cement stabilized macadam semi-rigid base layer is insensitive to moisture change and is not easy to be damaged by water. However, the flexible base layer has obvious defects of small rigidity and large deflection value, which causes large deformation of a pavement structure, easy horizontal displacement, and diseases such as looseness, pitted surface, net crack, sinking and the like.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a basic unit bituminous pavement structure is stabilized to filled big particle size cement, it is the novel basic unit structure between semi-rigid and flexibility, has both kept cement stabilized macadam semi-rigid basic unit and flexible basic unit and has respectively had outstanding advantage, has overcome not enough between them simultaneously again.
For solving the problems existing in the prior art, the technical scheme of the utility model is that: the utility model provides a basic unit bituminous pavement structure is stabilized to filled formula large grain size cement which characterized in that: the cement stabilized macadam foundation comprises a cement stabilized macadam foundation layer, a filling type large-particle size cement stabilized macadam foundation layer, a seal coat and an asphalt surface layer;
the asphalt surface layer, the sealing layer, the filling type large-particle-size cement stabilized macadam base layer and the cement stabilized macadam base layer are sequentially arranged from top to bottom to form a pavement structure;
the cement stabilized macadam base layer is a substance obtained by milling and planing an old asphalt pavement surface layer in a full-depth mode or a substance obtained by additionally paving a cement stabilized macadam base layer on an old road;
the filling type large-particle-size cement stabilized macadam base layer is a framework formed by large-particle-size main aggregate, and gaps are filled with cement stabilized macadam filling materials;
the seal layer is 1cm rubber asphalt macadam.
The resilience modulus of the filling type large-particle-size cement stabilized macadam foundation is 900-1000 MPa.
The thickness of the asphalt surface layer is 9-12 cm, 7-10 cm or 4-8 cm.
Compared with the prior art, the utility model has the advantages as follows:
1. the utility model has good anti-rutting performance; the crack of the pavement base can be greatly reduced, the bearing capacity of the pavement base is improved, and the capacity of resisting heavy-duty vehicles is enhanced;
2. the utility model can reduce the influence on traffic during construction;
3. the utility model discloses the road surface structure can suitably attenuate pitch surface course thickness, prolongs road surface structure life by a wide margin, is showing and practices thrift the full life cycle cost.
Drawings
Fig. 1 is a schematic structural diagram of the pavement of the present invention.
Description of the drawings: 1-cement stabilized macadam foundation, 2-filling type large-particle size cement stabilized macadam foundation, 3-seal coat and 4-asphalt surface coat.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment is a filled type large-particle size cement stabilized base asphalt pavement structure, as shown in fig. 1: the cement stabilized macadam foundation comprises a cement stabilized macadam foundation layer 1, a filling type large-particle size cement stabilized macadam foundation layer 2, a seal coat 3 and an asphalt surface coat 4;
the asphalt surface layer 4, the seal layer 3, the filling type large-particle-size cement stabilized macadam foundation layer 2 and the cement stabilized macadam foundation layer 1 are sequentially arranged from top to bottom to form a pavement structure.
The cement stabilized macadam base course 1 is a substance obtained by milling and planing an old asphalt pavement surface layer in a full-depth mode or a cement stabilized macadam base course substance additionally paved on an old road.
The filling type large-particle-size cement stabilized macadam base layer 2 is a rigid-flexible composite material, a framework is formed by main aggregates with large particle sizes, gaps are filled with cement stabilized macadam filling materials, the strength mainly comes from the framework embedding and shrinking effect among the main aggregates, and the filling materials play a role in stabilizing the framework of the main aggregates.
The filling type large-particle-size cement stabilized macadam base layer 2 is arranged between graded macadam and cement stabilized macadam, has better crack resistance than common cement stabilized macadam, is a novel base layer between semi-rigidity and flexibility, and has the resilience modulus of 900-1000 MPa.
The seal coat 3 is 1cm rubber asphalt macadam.
The thickness of the asphalt surface layer 4 has 5 thicknesses according to the road grade and the traffic volume:
(1) first level highway (extra heavy, heavy traffic): 9-12 cm of asphalt surface layer 4;
(2) first-level highway (medium and light traffic): 7-10 cm of an asphalt surface layer 4;
(3) second and third level roads (extra heavy and heavy traffic): 7-10 cm of an asphalt surface layer 4;
(4) second and third level roads (medium and light traffic): 4-8 cm of an asphalt surface layer 4;
(5) level four road: 4-8 cm of asphalt surface layer 4.
The filling type large-particle size cement stabilized macadam base 2 is a rigid-flexible composite material,
the utility model discloses the range of application of road surface structure does: major and middle repair and extension projects of expressways, national roads, provincial roads and low-grade roads.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (3)
1. The utility model provides a basic unit bituminous pavement structure is stabilized to filled formula large grain size cement which characterized in that: comprises a cement-stabilized macadam base layer (1), a filling type large-particle-size cement-stabilized macadam base layer (2), a seal coat (3) and an asphalt surface coat (4);
the asphalt surface layer (4), the sealing layer (3), the filling type large-particle-size cement-stabilized macadam foundation layer (2) and the cement-stabilized macadam foundation layer (1) are sequentially arranged from top to bottom to form a pavement structure;
the cement stabilized macadam foundation (1) is a substance obtained by milling and planing an old asphalt pavement surface layer in a full-depth mode or a cement stabilized macadam foundation substance paved on an old road again;
the filling type large-particle-size cement stabilized macadam base layer (2) is a framework formed by large-particle-size main aggregate, and gaps are filled with cement stabilized macadam filling materials;
the seal layer (3) is 1cm rubber asphalt macadam.
2. The filled large-particle size cement stabilized base asphalt pavement structure as claimed in claim 1, wherein: the resilience modulus of the filling type large-particle-size cement stabilized macadam foundation (2) is 900-1000 MPa.
3. The filled large-particle size cement stabilized base asphalt pavement structure according to claim 1 or 2, characterized in that: the thickness of the asphalt surface layer (4) is 9-12 cm, 7-10 cm or 4-8 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921471204.8U CN210657855U (en) | 2019-09-05 | 2019-09-05 | Filling type large-particle-size cement stabilized base asphalt pavement structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921471204.8U CN210657855U (en) | 2019-09-05 | 2019-09-05 | Filling type large-particle-size cement stabilized base asphalt pavement structure |
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| CN210657855U true CN210657855U (en) | 2020-06-02 |
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| CN201921471204.8U Active CN210657855U (en) | 2019-09-05 | 2019-09-05 | Filling type large-particle-size cement stabilized base asphalt pavement structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111574133A (en) * | 2020-06-23 | 2020-08-25 | 江苏东交智控科技集团股份有限公司 | Cement-stabilized macadam base material, preparation method thereof and asphalt pavement |
| CN116043632A (en) * | 2022-12-19 | 2023-05-02 | 河南城建学院 | Functional layer used between semi-rigid base layer and asphalt pavement |
-
2019
- 2019-09-05 CN CN201921471204.8U patent/CN210657855U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111574133A (en) * | 2020-06-23 | 2020-08-25 | 江苏东交智控科技集团股份有限公司 | Cement-stabilized macadam base material, preparation method thereof and asphalt pavement |
| CN116043632A (en) * | 2022-12-19 | 2023-05-02 | 河南城建学院 | Functional layer used between semi-rigid base layer and asphalt pavement |
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