Structure for additionally paving asphalt surface layer on old concrete pavement
By setting up a combined structure of concrete base course, bonding layer, asphalt surface course and fixed anchor on old concrete pavement, the problems of reflective cracking and delamination in the reconstruction of old cement concrete pavement were solved, and the structural resistance and comfort were improved.
Patent Information
- Application Number
- CN202520323034.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-02-27
AI Technical Summary
Reflective cracks and delamination are prone to occur during the renovation of old cement concrete pavements, and existing technologies lack effective structural forms and design methods.
The structure employs a combination of concrete base layer, bonding layer, asphalt surface layer, waterproof layer, fixing anchors and drainage holes, using fiber-reinforced asphalt mixture as stress-absorbing layer, combined with carbon structural steel materials, to form a strong and low-cost overlay structure.
It effectively solves the problems of reflective cracking and delamination, improves interlayer bonding strength, increases the service life of the device, and provides anti-slip properties, smoothness, and driving comfort.
Smart Images
Figure CN223907279U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to old concrete pavement overlay technical field, concretely relates to a kind of structures of old concrete pavement overlay asphalt surface course. BACKGROUND
[0002] In old cement concrete pavement reconstruction, the currently commonly used method is directly overlaying asphalt surface course, but due to the original cement concrete slab joint, crack under load and temperature, humidity change will produce relative displacement, cannot avoid the emergence of reflection crack, and between old cement and newly laid surface course, under the condition of different temperature, also can produce delamination and other problems, the regeneration of old cement concrete pavement is currently in the exploratory stage, has not formed a set of mature structure form and design method applicable to cement concrete pavement reconstruction overlaying;
[0003] Therefore, the utility model provides a kind of structures of old concrete pavement overlay asphalt surface course to make up and improve the deficiency of prior art. UTILITY MODEL CONTENT
[0004] To solve the above technical problem, the technical scheme adopted by the utility model is as follows: a kind of structures of old concrete pavement overlay asphalt surface course, including concrete base layer, a kind of structures of old concrete pavement overlay asphalt surface course includes: the upper portion of concrete base layer is provided with bonding layer, the upper portion of bonding layer is provided with asphalt surface course, the lower portion of concrete base layer is provided with waterproof layer, waterproof layer is provided with drainage hole at equal intervals, and fixed anchor is provided between adjacent drainage holes.
[0005] As preferred, the asphalt surface course includes a lower layer bonded to the bonding layer, the upper portion of the lower layer is provided with a stress absorbing layer, and the upper portion of the stress absorbing layer is provided with an upper layer.
[0006] As preferred, the stress absorbing layer is made of fiber reinforced asphalt mixture, and the thickness of the stress absorbing layer is 2mm-4mm.
[0007] As preferred, the upper layer is made of fine-grained asphalt concrete, and the lower layer is made of medium-grained asphalt concrete.
[0008] As preferred, the bonding layer is made of emulsified asphalt, and the thickness of the bonding layer is 0.5mm-1mm.
[0009] As preferred, the material of the fixed anchor is ordinary carbon structural steel.
[0010] Compared with the prior art, the utility model has the beneficial effects that:
[0011] The fixed anchor can effectively solve the problem that the old concrete surface and the newly laid layer are easy to be delaminated, the carbon structural steel material structure has good resistance, the material is simple to obtain, the cost is reduced and the service life of the device is increased, the asphalt surface layer composed of the lower layer, the stress absorbing layer and the upper layer can provide structural strength and load dispersion capacity, the stress absorbing layer can reduce reflection cracks and improve interlayer adhesion, and the upper layer can provide skid resistance, flatness and driving comfort. BRIEF DESCRIPTION OF DRAWINGS
[0012] Figure 1 is a whole structure schematic view of a preferred embodiment shown in the utility model;
[0013] Figure 2 is a whole structure profile view shown in the utility model;
[0014] Figure 3 is a whole structure profile view shown in the utility model; Figure 2 is an enlarged structure schematic view of A in the middle.
[0015] Reference numerals in the drawing are:
[0016] 1, concrete base layer; 2, bonding layer; 3, asphalt surface layer; 4, waterproof layer; 5, fixed anchor; 6, drainage hole;
[0017] 31, upper layer; 32, stress absorbing layer; 33, lower layer. DETAILED DESCRIPTION
[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model, obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model.
[0019] Embodiments of the utility model
[0020] Please refer to Figures 1 to 3As shown, an old concrete pavement asphalt overlay structure, including concrete base 1, an old concrete pavement asphalt overlay structure includes: the upper part of concrete base 1 is provided with bonding layer 2, the upper part of bonding layer 2 is provided with asphalt surface layer 3, the lower part of concrete base 1 is provided with waterproof layer 4, waterproof layer 4 is provided with drainage hole 6 at equal intervals, and fixed anchor 5 is arranged between adjacent drainage holes 6; asphalt surface layer 3 includes lower layer 33 bonded with bonding layer 2, the upper part of lower layer 33 is provided with stress absorbing layer 32, and the upper part of stress absorbing layer 32 is provided with upper layer 31; stress absorbing layer 32 adopts fiber reinforced asphalt mixture, and the thickness of stress absorbing layer 32 is 2mm-4mm; upper layer 31 adopts fine-grained asphalt concrete, and lower layer 33 adopts medium-grained asphalt concrete; bonding layer 2 adopts emulsified asphalt, and the thickness of bonding layer 2 is 0.5mm-1mm; the material of fixed anchor 5 is ordinary carbon structural steel;
[0021] The working principle of the utility model is: when an old concrete pavement asphalt overlay structure is added, first, the old concrete pavement is taken as concrete base 1, and the lower layer 33, stress absorbing layer 32 and upper layer 31 are firmly bonded through bonding layer 2 above the concrete base 1, then the fixed anchor 5 is penetrated through the waterproof layer 4, and is fixedly installed below the concrete base 1, and the drainage hole 6 is opened on the waterproof layer 4 at equal intervals.
[0022] It should be noted that in this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.
[0023] Although the embodiments of the utility model have been shown and described, it should be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.
Claims
1. A structure of an old concrete pavement overlaid with an asphalt surface layer, comprising a concrete base layer (1), characterized in that, The structure of the old concrete pavement asphalt overlay layer comprises: the upper part of the concrete base (1) is provided with a bonding layer (2), the upper part of the bonding layer (2) is provided with an asphalt surface layer (3), the lower part of the concrete base (1) is provided with a waterproof layer (4), the waterproof layer (4) is provided with drainage holes (6) at equal intervals, and the adjacent drainage holes (6) are provided with fixed anchors (5).
2. The structure of the old concrete pavement overlaid with asphalt according to claim 1, characterized in that, The asphalt surface layer (3) comprises a lower layer (33) bonded with the bonding layer (2), the upper part of the lower layer (33) is provided with a stress absorbing layer (32), and the upper part of the stress absorbing layer (32) is provided with an upper layer (31).
3. The structure of old concrete pavement overlaid with asphalt surface course according to claim 2, characterized in that, The stress absorbing layer (32) is made of fiber reinforced asphalt mixture, and the thickness of the stress absorbing layer (32) is 2mm-4mm.
4. The structure of the old concrete pavement overlaid with the asphalt surface course according to claim 2, characterized by, The upper layer (31) is made of fine-grained asphalt concrete, and the lower layer (33) is made of medium-grained asphalt concrete.
5. The structure of the old concrete pavement overlaid with asphalt according to claim 1, wherein The bonding layer (2) is made of emulsified asphalt, and the thickness of the bonding layer (2) is 0.5mm-1mm.
6. The structure of old concrete pavement overlaid with asphalt according to claim 1, wherein The material of the fixed anchor (5) is ordinary carbon structural steel.